import { ChevronDown, ChevronRight, Download, MoonStar, PackageOpen, ShieldCheck, Sparkles, Square, UserRoundMinus, UserRoundPlus, WandSparkles } from "lucide-react";
import { type FormEvent, useCallback, useEffect, useMemo, useState } from "react";

import { platformApiClient } from "../api/client";
import type {
  ConfigDiffLineResponse,
  ArtifactDownloadReferenceResponse,
  ArtifactResponse,
  GamePluginResponse,
  JobResponse,
  LogEntryBody,
  LogStreamResponse,
  ServerConfigDiffPreviewResponse,
  ServerConfigResponse,
  ServerInstanceResponse,
  ServerMemberResponse,
  ServerMetricsResponse
} from "../api/types";
import { ConfirmDialog, DiffView, UsageMeter } from "../components/OperationControls";
import { DiagnosticSummary, EmptyState, ErrorState, LoadingState, ResultBadge } from "../components/StateViews";
import type { PageComponentProps } from "../contracts/page";
import type { PluginBridgeAction, PluginBridgeManifestContract } from "../contracts/pluginBridge";
import { canStartServer, canStopServer, pluginLabel } from "../contracts/serverManagement";
import {
  serverDetailSections,
  serverIsOnline,
  type ConfigDiffView,
  type LlmSuggestionView,
  type PluginControlDescriptor,
  type PluginControlGroupView,
  type ServerDetailSection
} from "../contracts/workspace";
import { serverLifecycleCommandRequest } from "../schemas/serverManagement";
import { buildConfigDiff, diffHasChanges } from "../utils/diff";
import { createPluginBridgeDispatcher, createPluginBridgeHostContext, parsePluginArtifactReference } from "../utils/pluginBridgeHost";
import { cx } from "../utils/classes";
import { stateLabel, statusClass } from "./ServersPage";

type LoadState<T> = { status: "loading" } | { status: "error"; reason: string } | { status: "ready"; data: T };

const fallbackConfig = "# server.properties\nmax-players=20\nmotd=Welcome to the server\npvp=true\nview-distance=8\n";
const defaultConfigKey = "server.properties";

export function ServerDetailPage({ session, params, operations, onNavigate }: PageComponentProps) {
  const serverId = params.serverId ?? "";
  const [section, setSection] = useState<ServerDetailSection>("overview");
  const [instance, setInstance] = useState<LoadState<ServerInstanceResponse>>({ status: "loading" });
  const [metrics, setMetrics] = useState<ServerMetricsResponse | null>(null);
  const [plugins, setPlugins] = useState<GamePluginResponse[]>([]);
  const [jobs, setJobs] = useState<JobResponse[]>([]);
  const [artifacts, setArtifacts] = useState<ArtifactResponse[]>([]);
  const [confirm, setConfirm] = useState<null | { title: string; description: string; danger?: boolean; run: () => Promise<void> }>(null);
  const [confirmBusy, setConfirmBusy] = useState(false);

  const refresh = useCallback(async () => {
    if (!serverId) {
      setInstance({ status: "error", reason: "缺少服务器 ID" });
      return;
    }
    setInstance({ status: "loading" });
    try {
      const [detail, pluginResponse, jobResponse] = await Promise.all([
        platformApiClient.getServerInstance(serverId),
        platformApiClient.listGamePlugins(),
        platformApiClient.listJobs(serverId)
      ]);
      setInstance({ status: "ready", data: detail });
      setPlugins(pluginResponse.items);
      setJobs(jobResponse.items);
      const artifactLists = await Promise.all(
        jobResponse.items.slice(0, 20).map((job) =>
          platformApiClient
            .listArtifacts({ ownerKind: "job", ownerId: job.id, state: "available" })
            .then((response) => response.items)
            .catch(() => [] as ArtifactResponse[])
        )
      );
      setArtifacts(uniqueArtifacts(artifactLists.flat()));
    } catch (error) {
      setInstance({ status: "error", reason: error instanceof Error ? error.message : "加载失败" });
      setArtifacts([]);
    }
    try {
      const metricsResponse = await platformApiClient.listServerMetrics();
      setMetrics(metricsResponse.items.find((item) => item.serverInstanceId === serverId) ?? null);
    } catch {
      setMetrics(null);
    }
  }, [serverId]);

  useEffect(() => {
    void refresh();
  }, [refresh]);

  const serverOperations = useMemo(
    () => operations.operations.filter((operation) => operation.targetId === serverId || operation.targetId.startsWith(`${serverId}:`)),
    [operations.operations, serverId]
  );

  function requestLifecycle(current: ServerInstanceResponse, action: "start" | "stop") {
    setConfirm({
      title: action === "start" ? "启动服务器" : "停止服务器",
      description:
        action === "start"
          ? `确认启动服务器 ${current.name}（${current.id}）？`
          : `停止服务器 ${current.name}（${current.id}）会断开所有在线玩家，确认继续？`,
      danger: action === "stop",
      run: async () => {
        const operationId = operations.begin({
          intent: action === "start" ? "启动服务器" : "停止服务器",
          targetKind: "server",
          targetId: current.id,
          requester: session.displayName
        });
        try {
          const result =
            action === "start"
              ? await platformApiClient.startServerInstance(current.id, serverLifecycleCommandRequest(current, "start"))
              : await platformApiClient.stopServerInstance(current.id, serverLifecycleCommandRequest(current, "stop"));
          operations.succeed(operationId, `任务 ${result.job.id}（${result.job.capability}）已派发`, result.job);
          await refresh();
        } catch (error) {
          operations.fail(operationId, error instanceof Error ? error.message : "操作失败", operationId);
        }
      }
    });
  }

  if (!serverId) {
    return (
      <EmptyState title="未选择服务器" description="请从服务器列表进入详情页。" actionLabel="返回服务器列表" onAction={() => onNavigate("servers")} />
    );
  }

  return (
    <section className="server-detail-page" aria-labelledby="server-detail-title">
      <div className="action-strip">
        <button type="button" className="icon-command" onClick={() => onNavigate("servers")}>
          <MoonStar size={16} />
          <span>返回列表</span>
        </button>
        <button type="button" className="icon-command" onClick={() => void refresh()}>
          <Sparkles size={16} />
          <span>刷新</span>
        </button>
      </div>

      {instance.status === "loading" && <LoadingState label="正在加载服务器详情…" />}
      {instance.status === "error" && (
        <ErrorState title="服务器详情加载失败" reason={instance.reason} diagnosticId={`server-detail:${serverId}`} onRetry={() => void refresh()} />
      )}

      {instance.status !== "ready" && (
        <nav className="section-tabs" aria-label="server sections">
          {serverDetailSections.map((entry) => (
            <button
              key={entry.id}
              type="button"
              className={cx("section-tab", section === entry.id && "section-tab-active")}
              aria-current={section === entry.id ? "page" : undefined}
              onClick={() => setSection(entry.id)}
            >
              {entry.label}
            </button>
          ))}
        </nav>
      )}

      {instance.status === "ready" && (
        <>
          <header className="server-detail-header">
            <div className="server-detail-title-row">
              <div>
                <h1 id="server-detail-title">{instance.data.name}</h1>
                <span className="provider-id">
                  {instance.data.id} · 插件 {instance.data.pluginId}@{instance.data.pluginVersion} · 节点 {instance.data.runEndpointId}
                </span>
              </div>
              <div className="action-strip">
                <span className={cx("status-pill", statusClass(instance.data.state))}>{stateLabel(instance.data.state)}</span>
                <button
                  type="button"
                  className="icon-command"
                  disabled={!canStartServer(instance.data.state) || operations.isPending(instance.data.id, "启动服务器")}
                  onClick={() => requestLifecycle(instance.data, "start")}
                >
                  <WandSparkles size={15} />
                  <span>启动</span>
                </button>
                <button
                  type="button"
                  className="icon-command danger-command"
                  disabled={!canStopServer(instance.data.state) || operations.isPending(instance.data.id, "停止服务器")}
                  onClick={() => requestLifecycle(instance.data, "stop")}
                >
                  <Square size={15} />
                  <span>停止</span>
                </button>
              </div>
            </div>
            <div className="server-detail-stat-strip">
              <HeaderStat label="状态" value={serverIsOnline(instance.data.state) ? "在线" : "离线"} />
              <HeaderStat label="玩家" value={metrics?.playerCount !== undefined ? `${metrics.playerCount}${metrics.maxPlayers ? `/${metrics.maxPlayers}` : ""}` : "--"} />
              <HeaderStat label="TPS" value={metrics?.tps !== undefined ? metrics.tps.toFixed(1) : "--"} />
              <HeaderStat label="延迟" value={metrics?.latencyMs !== undefined ? `${Math.round(metrics.latencyMs)}ms` : "--"} />
              <HeaderStat label="CPU" value={metrics?.cpuPercent !== undefined ? `${Math.round(metrics.cpuPercent)}%` : "--"} />
              <HeaderStat label="内存" value={metrics?.memoryPercent !== undefined ? `${Math.round(metrics.memoryPercent)}%` : "--"} />
              <HeaderStat label="磁盘" value={metrics?.diskPercent !== undefined ? `${Math.round(metrics.diskPercent)}%` : "--"} />
            </div>
          </header>

          <nav className="section-tabs" aria-label="server sections">
            {serverDetailSections.map((entry) => (
              <button
                key={entry.id}
                type="button"
                className={cx("section-tab", section === entry.id && "section-tab-active")}
                aria-current={section === entry.id ? "page" : undefined}
                onClick={() => setSection(entry.id)}
              >
                {entry.label}
              </button>
            ))}
          </nav>

          {section === "overview" && <OverviewSection instance={instance.data} metrics={metrics} jobs={jobs} onOpenLogs={() => setSection("logs")} />}
          {section === "overview" && <ServerAdministratorsSection instance={instance.data} session={session} onChanged={(next) => setInstance({ status: "ready", data: next })} />}
          {section === "logs" && <LogsSection serverId={serverId} />}
          {section === "config" && <ConfigSection serverId={serverId} instance={instance.data} session={session} operations={operations} />}
          {section === "plugins" && <PluginControlsSection serverId={serverId} instance={instance.data} plugins={plugins} artifacts={artifacts} session={session} operations={operations} />}
          {section === "llm" && <LlmSection serverId={serverId} instance={instance.data} session={session} operations={operations} />}
          {section === "history" && <HistorySection serverId={serverId} serverOperations={serverOperations} jobs={jobs} artifacts={artifacts} />}
        </>
      )}

      <ConfirmDialog
        open={confirm !== null}
        title={confirm?.title ?? ""}
        description={confirm?.description ?? ""}
        confirmLabel="确认执行"
        danger={confirm?.danger}
        busy={confirmBusy}
        onCancel={() => setConfirm(null)}
        onConfirm={() => {
          if (!confirm) {
            return;
          }
          setConfirmBusy(true);
          void confirm.run().finally(() => {
            setConfirmBusy(false);
            setConfirm(null);
          });
        }}
      />
    </section>
  );
}

function uniqueArtifacts(artifacts: ArtifactResponse[]): ArtifactResponse[] {
  const byID = new Map<string, ArtifactResponse>();
  for (const artifact of artifacts) {
    byID.set(artifact.id, artifact);
  }
  return [...byID.values()];
}

interface ServerAdministratorsSectionProps {
  instance: ServerInstanceResponse;
  session: PageComponentProps["session"];
  onChanged: (instance: ServerInstanceResponse) => void;
}

function ServerAdministratorsSection({ instance, session, onChanged }: ServerAdministratorsSectionProps) {
  const [candidates, setCandidates] = useState<LoadState<ServerMemberResponse[]>>({ status: "loading" });
  const [selectedUserId, setSelectedUserId] = useState("");
  const [busyUserId, setBusyUserId] = useState<string | null>(null);
  const [result, setResult] = useState<{ status: "succeeded" | "failed"; label: string } | null>(null);
  const isOwner = instance.ownerUserId === session.id;

  const refreshCandidates = useCallback(async () => {
    if (!isOwner) {
      setCandidates({ status: "ready", data: [] });
      return;
    }
    setCandidates({ status: "loading" });
    try {
      const response = await platformApiClient.listServerAdministratorCandidates(instance.id);
      setCandidates({ status: "ready", data: response.items });
      setSelectedUserId((current) => (response.items.some((user) => user.id === current) ? current : response.items[0]?.id ?? ""));
    } catch (error) {
      setCandidates({ status: "error", reason: error instanceof Error ? error.message : "加载候选管理员失败" });
    }
  }, [instance.id, isOwner]);

  useEffect(() => {
    void refreshCandidates();
  }, [refreshCandidates]);

  async function addAdministrator(event: FormEvent<HTMLFormElement>) {
    event.preventDefault();
    if (!selectedUserId) {
      return;
    }
    setBusyUserId(selectedUserId);
    setResult(null);
    try {
      const next = await platformApiClient.addServerAdministrator(instance.id, { userId: selectedUserId });
      onChanged(next);
      setResult({ status: "succeeded", label: "已添加服务器管理员" });
      await refreshCandidates();
    } catch (error) {
      setResult({ status: "failed", label: error instanceof Error ? error.message : "添加管理员失败" });
    } finally {
      setBusyUserId(null);
    }
  }

  async function removeAdministrator(userId: string) {
    setBusyUserId(userId);
    setResult(null);
    try {
      const next = await platformApiClient.removeServerAdministrator(instance.id, userId);
      onChanged(next);
      setResult({ status: "succeeded", label: "已移除服务器管理员" });
      await refreshCandidates();
    } catch (error) {
      setResult({ status: "failed", label: error instanceof Error ? error.message : "移除管理员失败" });
    } finally {
      setBusyUserId(null);
    }
  }

  return (
    <article className="console-panel" aria-label="server administrators">
      <div className="panel-header">
        <h2>
          <ShieldCheck size={16} style={{ verticalAlign: "-2px" }} /> 管理成员
        </h2>
        <span className="page-status">{isOwner ? "服主可邀请/移除管理员" : "仅服主可调整成员"}</span>
      </div>
      {result && (
        <div style={{ marginBottom: 10 }}>
          <ResultBadge status={result.status} label={result.label} />
        </div>
      )}
      <div className="action-list">
        <span>服主：{instance.ownerUserId || "未绑定"}</span>
        <span>服务器管理员：{instance.adminUserIds.length > 0 ? instance.adminUserIds.join(" / ") : "暂无"}</span>
      </div>
      {isOwner && (
        <>
          <form className="provider-form" style={{ marginTop: 12 }} onSubmit={(event) => void addAdministrator(event)} aria-label="邀请服务器管理员">
            <div className="form-grid">
              <label>
                邀请管理员
                <select value={selectedUserId} onChange={(event) => setSelectedUserId(event.target.value)} disabled={candidates.status !== "ready" || candidates.data.length === 0}>
                  {candidates.status === "ready" && candidates.data.length === 0 && <option value="">暂无可邀请用户</option>}
                  {candidates.status === "ready" &&
                    candidates.data.map((user) => (
                      <option key={user.id} value={user.id}>
                        {user.displayName}（{user.email ?? user.id}）
                      </option>
                    ))}
                </select>
              </label>
            </div>
            {candidates.status === "loading" && <LoadingState label="正在加载可邀请用户…" compact />}
            {candidates.status === "error" && (
              <ErrorState title="候选管理员加载失败" reason={candidates.reason} diagnosticId={`server-admin-candidates:${instance.id}`} onRetry={() => void refreshCandidates()} compact />
            )}
            <button type="submit" className="primary-command" disabled={!selectedUserId || busyUserId !== null}>
              <UserRoundPlus size={14} />
              <span>{busyUserId === selectedUserId ? "邀请中…" : "邀请为管理员"}</span>
            </button>
          </form>
          {instance.adminUserIds.length > 0 && (
            <div className="resource-list" style={{ marginTop: 12 }}>
              {instance.adminUserIds.map((userId) => (
                <article key={userId} className="resource-list-item">
                  <span>
                    <strong>{userId}</strong>
                    <span className="provider-id">服务器管理员</span>
                  </span>
                  <button type="button" className="theme-upload" disabled={busyUserId !== null} onClick={() => void removeAdministrator(userId)}>
                    <UserRoundMinus size={13} />
                    <span>{busyUserId === userId ? "移除中…" : "移除"}</span>
                  </button>
                </article>
              ))}
            </div>
          )}
        </>
      )}
    </article>
  );
}

function HeaderStat({ label, value }: { label: string; value: string }) {
  return (
    <span className="server-card-stat">
      <span>{label}</span>
      <strong>{value}</strong>
    </span>
  );
}

interface OverviewSectionProps {
  instance: ServerInstanceResponse;
  metrics: ServerMetricsResponse | null;
  jobs: JobResponse[];
  onOpenLogs: () => void;
}

function OverviewSection({ instance, metrics, jobs, onOpenLogs }: OverviewSectionProps) {
  const pending = jobs.filter((job) => job.state === "queued" || job.state === "accepted" || job.state === "running");
  const failed = jobs.filter((job) => job.state === "failed");
  return (
    <div className="overview-two-col">
      <article className="console-panel">
        <div className="panel-header">
          <h2>资源使用</h2>
          <span className="page-status">{metrics ? new Date(metrics.collectedAt).toLocaleTimeString() : "暂无指标"}</span>
        </div>
        <div className="server-card-meters">
          <UsageMeter label="CPU" percent={metrics?.cpuPercent} />
          <UsageMeter label="内存" percent={metrics?.memoryPercent} />
          <UsageMeter label="磁盘" percent={metrics?.diskPercent} />
        </div>
      </article>
      <article className="console-panel">
        <div className="panel-header">
          <h2>需要关注</h2>
          <button type="button" className="icon-command" onClick={onOpenLogs}>
            查看日志
          </button>
        </div>
        <div className="action-list">
          {instance.state === "failed" && <span>⚠ 服务器处于异常状态，建议查看日志与操作历史。</span>}
          {failed.length > 0 && <span>⚠ 最近有 {failed.length} 个任务失败。</span>}
          {pending.length > 0 ? (
            <span>
              进行中任务：{pending[0].capability}（{pending[0].state}，{pending[0].progress.percent}%）
            </span>
          ) : (
            <span>当前没有进行中的任务。</span>
          )}
          <span>配置版本：v{instance.configVersion}，最近更新 {new Date(instance.updatedAt).toLocaleString()}</span>
        </div>
      </article>
    </div>
  );
}

interface LogsSectionProps {
  serverId: string;
}

interface LogFilterState {
  level: string;
  keyword: string;
  source: string;
  sinceMinutes: string;
}

function LogsSection({ serverId }: LogsSectionProps) {
  const [streams, setStreams] = useState<LoadState<LogStreamResponse[]>>({ status: "loading" });
  const [entries, setEntries] = useState<Array<LogEntryBody & { source: string }>>([]);
  const [filter, setFilter] = useState<LogFilterState>({ level: "all", keyword: "", source: "all", sinceMinutes: "all" });
  const [selected, setSelected] = useState<(LogEntryBody & { source: string }) | null>(null);

  const refresh = useCallback(async () => {
    setStreams({ status: "loading" });
    try {
      const response = await platformApiClient.listLogStreams();
      const serverStreams = response.items.filter((stream) => stream.serverInstanceId === serverId);
      setStreams({ status: "ready", data: serverStreams });
      const collected: Array<LogEntryBody & { source: string }> = [];
      for (const stream of serverStreams) {
        try {
          const cursor = await platformApiClient.queryLogStream({ logStreamId: stream.id, afterSeq: 0, limit: 200 });
          collected.push(...cursor.entries.map((entry) => ({ ...entry, source: stream.source || stream.streamKey })));
        } catch {
          // one unreadable stream should not blank the rest
        }
      }
      collected.sort((a, b) => (a.timestamp < b.timestamp ? 1 : -1));
      setEntries(collected);
    } catch (error) {
      setStreams({ status: "error", reason: error instanceof Error ? error.message : "加载失败" });
    }
  }, [serverId]);

  useEffect(() => {
    void refresh();
  }, [refresh]);

  const sources = useMemo(() => [...new Set(entries.map((entry) => entry.source))], [entries]);

  const visible = useMemo(() => {
    const keyword = filter.keyword.trim().toLowerCase();
    const sinceMs = filter.sinceMinutes === "all" ? null : Date.now() - Number(filter.sinceMinutes) * 60_000;
    return entries.filter((entry) => {
      if (filter.level !== "all" && (entry.level ?? "info").toLowerCase() !== filter.level) {
        return false;
      }
      if (filter.source !== "all" && entry.source !== filter.source) {
        return false;
      }
      if (keyword && !entry.line.toLowerCase().includes(keyword)) {
        return false;
      }
      if (sinceMs !== null && new Date(entry.timestamp).getTime() < sinceMs) {
        return false;
      }
      return true;
    });
  }, [entries, filter]);

  return (
    <article className="console-panel" aria-label="server logs">
      <div className="panel-header">
        <h2>日志</h2>
        <button type="button" className="icon-command" onClick={() => void refresh()}>
          <Sparkles size={14} />
          <span>刷新</span>
        </button>
      </div>
      <div className="log-filter-bar">
        <select value={filter.level} aria-label="按级别过滤" onChange={(event) => setFilter((current) => ({ ...current, level: event.target.value }))}>
          <option value="all">全部级别</option>
          <option value="error">error</option>
          <option value="warn">warn</option>
          <option value="info">info</option>
          <option value="debug">debug</option>
        </select>
        <select value={filter.source} aria-label="按来源过滤" onChange={(event) => setFilter((current) => ({ ...current, source: event.target.value }))}>
          <option value="all">全部来源</option>
          {sources.map((source) => (
            <option key={source} value={source}>
              {source}
            </option>
          ))}
        </select>
        <select
          value={filter.sinceMinutes}
          aria-label="按时间过滤"
          onChange={(event) => setFilter((current) => ({ ...current, sinceMinutes: event.target.value }))}
        >
          <option value="all">全部时间</option>
          <option value="15">最近 15 分钟</option>
          <option value="60">最近 1 小时</option>
          <option value="1440">最近 24 小时</option>
        </select>
        <input
          type="search"
          value={filter.keyword}
          placeholder="关键字"
          aria-label="按关键字过滤"
          onChange={(event) => setFilter((current) => ({ ...current, keyword: event.target.value }))}
        />
      </div>
      {streams.status === "loading" && <LoadingState label="正在加载日志…" compact />}
      {streams.status === "error" && <ErrorState title="日志加载失败" reason={streams.reason} diagnosticId={`logs:${serverId}`} onRetry={() => void refresh()} compact />}
      {streams.status === "ready" && entries.length === 0 && (
        <EmptyState title="暂无日志" description="该服务器还没有已入库的日志流，或运行端尚未上报日志。" actionLabel="刷新" onAction={() => void refresh()} />
      )}
      {streams.status === "ready" && entries.length > 0 && visible.length === 0 && (
        <EmptyState title="没有匹配的日志" description="调整级别、来源、时间范围或关键字后再试。" />
      )}
      {visible.length > 0 && (
        <div className="log-list" role="list">
          {visible.map((entry) => (
            <button key={`${entry.source}-${entry.seq}`} type="button" className="log-line" role="listitem" onClick={() => setSelected(entry)}>
              <time>{new Date(entry.timestamp).toLocaleTimeString()}</time>
              <span className={cx("log-level", levelClass(entry.level))}>{(entry.level ?? "info").toUpperCase()}</span>
              <span>{entry.line}</span>
            </button>
          ))}
        </div>
      )}

      {selected && (
        <div className="drawer-backdrop" role="presentation" onClick={() => setSelected(null)}>
          <div className="drawer-panel" role="dialog" aria-modal="true" aria-label="日志详情" onClick={(event) => event.stopPropagation()}>
            <div className="panel-header">
              <h2>日志详情</h2>
              <button type="button" className="drawer-close" onClick={() => setSelected(null)}>
                关闭
              </button>
            </div>
            <dl className="detail-list">
              <div>
                <dt>时间</dt>
                <dd>{new Date(selected.timestamp).toLocaleString()}</dd>
              </div>
              <div>
                <dt>级别</dt>
                <dd>{(selected.level ?? "info").toUpperCase()}</dd>
              </div>
              <div>
                <dt>来源</dt>
                <dd>{selected.source}</dd>
              </div>
              <div>
                <dt>序号</dt>
                <dd>{selected.seq}</dd>
              </div>
              <div>
                <dt>内容</dt>
                <dd>{selected.line}</dd>
              </div>
              {selected.fields && Object.keys(selected.fields).length > 0 && (
                <div>
                  <dt>字段</dt>
                  <dd>
                    {Object.entries(selected.fields)
                      .map(([key, value]) => `${key}=${value}`)
                      .join(" ")}
                  </dd>
                </div>
              )}
            </dl>
            <DiagnosticSummary diagnosticId={`log:${serverId}:${selected.source}:${selected.seq}`} detail={selected.line} />
          </div>
        </div>
      )}
    </article>
  );
}

function levelClass(level?: string): string {
  const normalized = (level ?? "info").toLowerCase();
  if (normalized === "error" || normalized === "fatal") {
    return "log-level-error";
  }
  if (normalized === "warn" || normalized === "warning") {
    return "log-level-warn";
  }
  return "log-level-info";
}

interface ConfigSectionProps {
  serverId: string;
  instance: ServerInstanceResponse;
  session: PageComponentProps["session"];
  operations: PageComponentProps["operations"];
}

function ConfigSection({ serverId, instance, session, operations }: ConfigSectionProps) {
  const [config, setConfig] = useState<LoadState<{ content: string; source: "api" | "local" }>>({ status: "loading" });
  const [draft, setDraft] = useState("");
  const [diff, setDiff] = useState<ConfigDiffView | null>(null);
  const [previewBusy, setPreviewBusy] = useState(false);
  const [previewError, setPreviewError] = useState<string | null>(null);

  const refresh = useCallback(async () => {
    setConfig({ status: "loading" });
    try {
      const response: ServerConfigResponse = await platformApiClient.getServerConfig(serverId);
      setConfig({ status: "ready", data: { content: response.content, source: "api" } });
      setDraft(response.content);
    } catch {
      setConfig({ status: "ready", data: { content: fallbackConfig, source: "local" } });
      setDraft(fallbackConfig);
    }
  }, [serverId]);

  useEffect(() => {
    void refresh();
  }, [refresh]);

  async function prepareDiff(event: FormEvent<HTMLFormElement>) {
    event.preventDefault();
    if (config.status !== "ready") {
      return;
    }
    setPreviewBusy(true);
    setPreviewError(null);
    try {
      const preview = await platformApiClient.previewServerConfigDiff(serverId, {
        expectedConfigVersion: instance.configVersion,
        key: defaultConfigKey,
        proposedContent: draft
      });
      setDiff(configDiffViewFromPreview(preview));
    } catch (error) {
      setPreviewError(error instanceof Error ? error.message : "配置差异预览失败");
    } finally {
      setPreviewBusy(false);
    }
  }

  async function submitDiff() {
    if (!diff || config.status !== "ready") {
      return;
    }
    const operationId = operations.begin({ intent: "写入配置", targetKind: "config", targetId: serverId, requester: session.displayName });
    try {
      const dispatch = await platformApiClient.approveServerConfigWrite(serverId, {
        expectedConfigVersion: diff.configVersion ?? instance.configVersion,
        key: diff.key ?? defaultConfigKey,
        proposedContent: diff.nextContent,
        proposedContentInputRef: diff.proposedContentInputRef,
        idempotencyKey: `web:config.write:${serverId}:${Date.now()}`
      });
      const job = dispatch.job;
      operations.succeed(operationId, `配置写入任务 ${job.id} 已派发`, job);
      setDiff(null);
    } catch (error) {
      operations.fail(operationId, error instanceof Error ? error.message : "配置写入任务派发失败", operationId);
    }
  }

  const writeOperation = operations.operations.find((operation) => operation.intent === "写入配置" && operation.targetId === serverId);

  return (
    <article className="console-panel" aria-label="server configuration">
      <div className="panel-header">
        <h2>配置</h2>
        {config.status === "ready" && (
          <span className="page-status">{config.data.source === "api" ? `配置版本 v${instance.configVersion}` : "本地示例配置（配置读取接口未提供）"}</span>
        )}
      </div>
      {writeOperation && (
        <div style={{ marginBottom: 10 }}>
          <ResultBadge
            status={writeOperation.status}
            label={
              writeOperation.status === "pending"
                ? "配置写入中…"
                : writeOperation.status === "succeeded"
                  ? (writeOperation.message ?? "写入任务已派发")
                  : `写入失败：${writeOperation.errorReason}（诊断 ${writeOperation.diagnosticId}）`
            }
          />
        </div>
      )}
      {config.status === "loading" && <LoadingState label="正在加载配置…" compact />}
      {previewError && <ErrorState title="配置差异预览失败" reason={previewError} compact />}
      {config.status === "ready" && (
        <form className="provider-form" style={{ border: 0, padding: 0 }} onSubmit={(event) => void prepareDiff(event)}>
          <label>
            配置内容
            <textarea value={draft} onChange={(event) => setDraft(event.target.value)} rows={10} aria-label="配置编辑器" />
          </label>
          <button type="submit" className="primary-command" disabled={previewBusy || draft === config.data.content}>
            {previewBusy ? "预览中…" : "预览变更"}
          </button>
        </form>
      )}

      {diff && (
        <div className="drawer-backdrop" role="presentation" onClick={() => setDiff(null)}>
          <div className="drawer-panel" role="dialog" aria-modal="true" aria-label="配置变更确认" onClick={(event) => event.stopPropagation()}>
            <div className="panel-header">
              <h2>确认配置变更</h2>
              <span className="page-status">{diff.summary}</span>
            </div>
            <p style={{ margin: 0, color: "var(--ink-soft)", fontSize: 14 }}>
              目标服务器：<strong>{instance.name}</strong>（{serverId}）。请检查平台返回的差异，确认后才会派发写入任务。
            </p>
            <DiffView lines={diff.lines} />
            <div className="confirm-actions">
              <button type="button" onClick={() => setDiff(null)}>
                取消
              </button>
              <button type="button" className="confirm-primary" disabled={!diffHasChanges(diff)} onClick={() => void submitDiff()}>
                确认并派发写入任务
              </button>
            </div>
          </div>
        </div>
      )}
    </article>
  );
}

interface PluginControlsSectionProps {
  serverId: string;
  instance: ServerInstanceResponse;
  plugins: GamePluginResponse[];
  artifacts: ArtifactResponse[];
  session: PageComponentProps["session"];
  operations: PageComponentProps["operations"];
}

function controlsForPlugin(plugin: GamePluginResponse): PluginControlDescriptor[] {
  const controls: PluginControlDescriptor[] = [];
  for (const [action] of Object.entries(plugin.lifecycleActions)) {
    if (action === "install" || action === "restart" || action === "status") {
      continue;
    }
    if (action !== "start" && action !== "stop") {
      continue;
    }
    controls.push({
      key: `lifecycle:${action}`,
      label: lifecycleControlLabel(action),
      description: `通过平台生命周期 API 执行插件声明的 ${action} 动作`,
      capability: `process.${action}`,
      lifecycleAction: action,
      dangerous: action === "stop"
    });
  }
  for (const bridgeAction of plugin.bridgeActions) {
    if (bridgeAction === "jobs.dispatch") {
      controls.push({
        key: "bridge:gift",
        label: "发送礼物",
        description: "通过插件任务向在线玩家发放礼物",
        capability: "plugin.gift.send",
        dangerous: false
      });
      controls.push({
        key: "bridge:activity",
        label: "调整活动",
        description: "修改插件当前的活动配置",
        capability: "plugin.activity.update",
        dangerous: false
      });
    }
    if (bridgeAction === "logs.query") {
      controls.push({
        key: "bridge:module-restart",
        label: "重启插件模块",
        description: "重启该插件在此服务器上的运行模块",
        capability: "plugin.module.restart",
        dangerous: true
      });
    }
  }
  const unique = new Map(controls.map((control) => [control.key, control]));
  return [...unique.values()];
}

function lifecycleControlLabel(action: string): string {
  switch (action) {
    case "start":
      return "启动进程";
    case "stop":
      return "停止进程";
    case "restart":
      return "重启进程";
    default:
      return action;
  }
}

function PluginControlsSection({ serverId, instance, plugins, artifacts, session, operations }: PluginControlsSectionProps) {
  const [collapsed, setCollapsed] = useState<Set<string>>(new Set());
  const [confirmControl, setConfirmControl] = useState<null | { plugin: PluginControlGroupView; control: PluginControlDescriptor }>(null);
  const [confirmBusy, setConfirmBusy] = useState(false);

  const groups = useMemo<PluginControlGroupView[]>(() => {
    const installed = plugins.filter((plugin) => plugin.id === instance.pluginId || plugin.status === "installed");
    const relevant = installed.some((plugin) => plugin.id === instance.pluginId)
      ? installed.filter((plugin) => plugin.id === instance.pluginId)
      : installed;
    return relevant.map((plugin) => ({
      pluginId: plugin.id,
      pluginName: pluginLabel(plugin, plugin.id),
      version: plugin.version,
      status: plugin.status,
      controls: controlsForPlugin(plugin)
    }));
  }, [plugins, instance.pluginId]);

  function toggleGroup(pluginId: string) {
    setCollapsed((current) => {
      const next = new Set(current);
      if (next.has(pluginId)) {
        next.delete(pluginId);
      } else {
        next.add(pluginId);
      }
      return next;
    });
  }

  async function dispatchControl(group: PluginControlGroupView, control: PluginControlDescriptor) {
    const operationId = operations.begin({
      intent: control.label,
      targetKind: "plugin",
      targetId: `${serverId}:${group.pluginId}`,
      requester: session.displayName
    });
    try {
      if (control.lifecycleAction === "start" || control.lifecycleAction === "stop") {
        const result =
          control.lifecycleAction === "start"
            ? await platformApiClient.startServerInstance(instance.id, serverLifecycleCommandRequest(instance, "start"))
            : await platformApiClient.stopServerInstance(instance.id, serverLifecycleCommandRequest(instance, "stop"));
        operations.succeed(operationId, `平台生命周期任务 ${result.job.id} 已派发（${result.job.capability}）`, result.job);
        return;
      }
      const job = await platformApiClient.createJob({
        id: `job-${control.capability.replaceAll(".", "-")}-${serverId}-${Date.now()}`,
        serverInstanceId: serverId,
        runEndpointId: instance.runEndpointId,
        capability: control.capability,
        idempotencyKey: `web:${control.capability}:${serverId}:${group.pluginId}:${Date.now()}`
      });
      operations.succeed(operationId, `任务 ${job.id} 已派发（${control.capability}）`, job);
    } catch (error) {
      operations.fail(operationId, error instanceof Error ? error.message : "插件操作派发失败", operationId);
    }
  }

  return (
    <div className="operation-list" aria-label="plugin controls">
      {groups.length === 0 && (
        <EmptyState title="该服务器没有可控制的插件" description="安装插件后，这里会按插件分组显示可用的日常操作。" />
      )}
      {groups.map((group) => {
        const isCollapsed = collapsed.has(group.pluginId);
        return (
          <article key={group.pluginId} className="plugin-group">
            <button type="button" className="plugin-group-header" aria-expanded={!isCollapsed} onClick={() => toggleGroup(group.pluginId)}>
              <span>
                <strong>{group.pluginName}</strong>
                <span className="provider-id">
                  {group.pluginId}@{group.version} · 作用于 {serverId}
                </span>
              </span>
              {isCollapsed ? <ChevronRight size={18} /> : <ChevronDown size={18} />}
            </button>
            {!isCollapsed && (
              <div className="plugin-group-body">
                {plugins.find((plugin) => plugin.id === group.pluginId) && (
                  <PluginBridgeExecutionPanel
                    plugin={plugins.find((plugin) => plugin.id === group.pluginId)!}
                    serverId={serverId}
                    serverInstance={instance}
                    artifacts={artifacts}
                  />
                )}
                {group.controls.length === 0 && <span className="provider-id">该插件未声明可用控制项。</span>}
                {group.controls.map((control) => {
                  const targetId = `${serverId}:${group.pluginId}`;
                  const latest = operations.operations.find((operation) => operation.targetId === targetId && operation.intent === control.label);
                  const pending = latest?.status === "pending";
                  return (
                    <div key={control.key} className="plugin-control-row">
                      <span>
                        <strong>{control.label}</strong>
                        <p>{control.description}</p>
                        {latest && (
                          <ResultBadge
                            status={latest.status}
                            label={
                              latest.status === "pending"
                                ? "执行中…"
                                : latest.status === "succeeded"
                                  ? (latest.message ?? "已完成")
                                  : `失败：${latest.errorReason}（诊断 ${latest.diagnosticId}）`
                            }
                          />
                        )}
                      </span>
                      <button
                        type="button"
                        className={cx("icon-command", control.dangerous && "danger-command")}
                        disabled={pending}
                        onClick={() => setConfirmControl({ plugin: group, control })}
                      >
                        {pending ? "执行中…" : "执行"}
                      </button>
                    </div>
                  );
                })}
              </div>
            )}
          </article>
        );
      })}

      <ConfirmDialog
        open={confirmControl !== null}
        title={`执行「${confirmControl?.control.label ?? ""}」`}
        description={`目标：服务器 ${serverId} 的插件 ${confirmControl?.plugin.pluginName ?? ""}。该操作只影响当前服务器实例。`}
        confirmLabel="确认执行"
        danger={confirmControl?.control.dangerous}
        busy={confirmBusy}
        onCancel={() => setConfirmControl(null)}
        onConfirm={() => {
          if (!confirmControl) {
            return;
          }
          setConfirmBusy(true);
          void dispatchControl(confirmControl.plugin, confirmControl.control).finally(() => {
            setConfirmBusy(false);
            setConfirmControl(null);
          });
        }}
      />
    </div>
  );
}

interface PluginBridgeExecutionPanelProps {
  plugin: GamePluginResponse;
  serverId: string;
  serverInstance: ServerInstanceResponse;
  artifacts: ArtifactResponse[];
}

function PluginBridgeExecutionPanel({ plugin, serverId, serverInstance, artifacts }: PluginBridgeExecutionPanelProps) {
  const [pendingAction, setPendingAction] = useState<PluginBridgeAction | null>(null);
  const [result, setResult] = useState<{ status: "succeeded" | "failed" | "pending"; label: string } | null>(null);
  const page = plugin.pages[0];
  if (!page || plugin.bridgeActions.length === 0) {
    return null;
  }
  const contract: PluginBridgeManifestContract = {
    id: plugin.id,
    declaredPermissions: plugin.declaredPermissions as PluginBridgeManifestContract["declaredPermissions"],
    bridgeActions: plugin.bridgeActions as PluginBridgeAction[],
    pages: plugin.pages.map((item) => ({
      key: item.key,
      title: item.title,
      path: item.path,
      permissions: item.permissions as PluginBridgeManifestContract["declaredPermissions"],
      bridgeActions: item.bridgeActions as PluginBridgeAction[] | undefined
    })),
    aiPurposes: plugin.aiPurposes
  };
  const context = createPluginBridgeHostContext({
    plugin: contract,
    routeKey: page.key,
    serverInstanceId: serverId,
    themeTokens: { colorScheme: "dark", accentColor: "#7dd3fc" }
  });
  const executableActions = context.bridgeActions.filter(
    (action) => action === "server.instances.read" || action === "files.request" || action === "artifacts.open" || action === "ai.invoke"
  );

  async function execute(action: PluginBridgeAction) {
    setPendingAction(action);
    setResult({ status: "pending", label: "桥接请求执行中" });
    const dispatch = createPluginBridgeDispatcher(context, platformApiClient);
    const response = await dispatch({
      requestId: `web:bridge:${serverId}:${plugin.id}:${action}:${Date.now()}`,
      action,
      aiPurpose: action === "ai.invoke" ? plugin.aiPurposes[0] : undefined,
      payload: bridgePayloadForAction(action, serverInstance, artifacts[0])
    });
    setPendingAction(null);
    if (response.status === "ok" || response.status === "queued") {
      setResult({ status: "succeeded", label: bridgeResultLabel(response.status, response.result) });
      return;
    }
    setResult({ status: "failed", label: response.error?.message ?? "桥接执行被拒绝" });
  }

  return (
    <div className="plugin-control-row" aria-label="plugin bridge execution">
      <span>
        <strong>{page.title} 桥接执行</strong>
        <p>{context.permissions.join(" / ") || "无可用权限"}</p>
        {result && <ResultBadge status={result.status} label={result.label} />}
      </span>
      <div className="action-strip">
        {executableActions.slice(0, 3).map((action) => (
          <button
            key={action}
            type="button"
            className="icon-command"
            disabled={pendingAction !== null || (action === "artifacts.open" && artifacts.length === 0)}
            onClick={() => void execute(action)}
            title={`执行 ${action}`}
          >
            <Sparkles size={14} />
            <span>{pendingAction === action ? "执行中" : bridgeActionLabel(action)}</span>
          </button>
        ))}
      </div>
    </div>
  );
}

function bridgePayloadForAction(action: PluginBridgeAction, serverInstance: ServerInstanceResponse, artifact?: ArtifactResponse): Record<string, string> | undefined {
  if (action === "files.request") {
    return { operation: "read", key: "logs/latest.log", expectedConfigVersion: String(serverInstance.configVersion) };
  }
  if (action === "artifacts.open" && artifact) {
    return { artifactId: artifact.id };
  }
  return undefined;
}

function bridgeActionLabel(action: PluginBridgeAction): string {
  switch (action) {
    case "server.instances.read":
      return "读取上下文";
    case "files.request":
      return "请求文件";
    case "ai.invoke":
      return "AI 调用";
    case "artifacts.open":
      return "打开制品";
    default:
      return action;
  }
}

function bridgeResultLabel(status: string, result?: Record<string, string>): string {
  if (status === "queued") {
    return `已派发任务 ${result?.jobId ?? ""}`.trim();
  }
  if (result?.recommendation) {
    return "AI 建议已返回";
  }
  if (parsePluginArtifactReference(result)) {
    return "制品引用已返回";
  }
  return result?.serverInstanceId ? `服务器上下文 ${result.serverInstanceId} 已返回` : "桥接请求已完成";
}

interface LlmSectionProps {
  serverId: string;
  instance: ServerInstanceResponse;
  session: PageComponentProps["session"];
  operations: PageComponentProps["operations"];
}

function LlmSection({ serverId, instance, session, operations }: LlmSectionProps) {
  const [prompt, setPrompt] = useState("");
  const [currentConfig, setCurrentConfig] = useState<string>(fallbackConfig);
  const [suggestion, setSuggestion] = useState<LlmSuggestionView | null>(null);
  const [confirming, setConfirming] = useState(false);
  const [busy, setBusy] = useState(false);

  useEffect(() => {
    let cancelled = false;
    void platformApiClient
      .getServerConfig(serverId)
      .then((response) => {
        if (!cancelled) {
          setCurrentConfig(response.content);
        }
      })
      .catch(() => {
        // keep the local fallback config
      });
    return () => {
      cancelled = true;
    };
  }, [serverId]);

  async function requestSuggestion(event: FormEvent<HTMLFormElement>) {
    event.preventDefault();
    if (!prompt.trim()) {
      return;
    }
    setBusy(true);
    setSuggestion(null);
    try {
      const response = await platformApiClient.suggestServerConfig({ serverInstanceId: serverId, prompt: prompt.trim(), currentConfig });
      const preview = response.suggestedConfig
        ? await platformApiClient.previewServerConfigDiff(serverId, {
            expectedConfigVersion: instance.configVersion,
            key: defaultConfigKey,
            proposedContent: response.suggestedConfig
          })
        : undefined;
      setSuggestion({
        serverInstanceId: serverId,
        source: "api",
        recommendation: response.recommendation,
        diff: preview ? configDiffViewFromPreview(preview) : undefined
      });
    } catch {
      setSuggestion(buildLocalSuggestion(serverId, prompt.trim(), currentConfig));
    } finally {
      setBusy(false);
    }
  }

  async function applySuggestion() {
    if (!suggestion?.diff) {
      return;
    }
    const operationId = operations.begin({ intent: "应用 AI 配置建议", targetKind: "llm", targetId: serverId, requester: session.displayName });
    try {
      const dispatch = await platformApiClient.approveServerConfigWrite(serverId, {
        expectedConfigVersion: suggestion.diff.configVersion ?? instance.configVersion,
        key: suggestion.diff.key ?? defaultConfigKey,
        proposedContent: suggestion.diff.nextContent,
        proposedContentInputRef: suggestion.diff.proposedContentInputRef,
        idempotencyKey: `web:config.write.llm:${serverId}:${Date.now()}`
      });
      const job = dispatch.job;
      operations.succeed(operationId, `AI 建议已确认，写入任务 ${job.id} 已派发`, job);
      setSuggestion(null);
      setConfirming(false);
    } catch (error) {
      operations.fail(operationId, error instanceof Error ? error.message : "写入任务派发失败", operationId);
      setConfirming(false);
    }
  }

  const llmOperation = operations.operations.find((operation) => operation.intent === "应用 AI 配置建议" && operation.targetId === serverId);

  return (
    <article className="console-panel" aria-label="llm configuration assistance">
      <div className="panel-header">
        <h2>
          <Sparkles size={16} style={{ verticalAlign: "-2px" }} /> AI 配置助手
        </h2>
        <span className="page-status">建议仅作用于 {serverId}</span>
      </div>
      <p style={{ margin: "0 0 12px", color: "var(--ink-soft)", fontSize: 13.5 }}>
        AI 建议会先生成推荐说明和配置差异，<strong>不会自动写入</strong>。只有你确认差异后，平台才会派发写入任务。前端不会接触任何 AI 提供商密钥。
      </p>
      {llmOperation && (
        <div style={{ marginBottom: 10 }}>
          <ResultBadge
            status={llmOperation.status}
            label={
              llmOperation.status === "pending"
                ? "写入中…"
                : llmOperation.status === "succeeded"
                  ? (llmOperation.message ?? "已派发")
                  : `失败：${llmOperation.errorReason}（诊断 ${llmOperation.diagnosticId}）`
            }
          />
        </div>
      )}
      <form className="provider-form" style={{ border: 0, padding: 0 }} onSubmit={(event) => void requestSuggestion(event)}>
        <label>
          想让 AI 帮你调整什么？
          <textarea
            value={prompt}
            rows={3}
            placeholder="例如：把最大玩家数提高到 40，并关闭 PVP"
            onChange={(event) => setPrompt(event.target.value)}
          />
        </label>
        <button type="submit" className="primary-command" disabled={busy || !prompt.trim()}>
          {busy ? "生成建议中…" : "生成建议"}
        </button>
      </form>

      {suggestion && (
        <div style={{ display: "grid", gap: 12, marginTop: 14 }}>
          <div className="panel-header" style={{ marginBottom: 0 }}>
            <h3>AI 建议</h3>
            <span className="page-status">{suggestion.source === "api" ? "平台 LLM" : "本地建议（LLM 接口未提供）"}</span>
          </div>
          <p style={{ margin: 0, color: "var(--ink-soft)", fontSize: 14 }}>{suggestion.recommendation}</p>
          {suggestion.diff ? (
            <>
              <DiffView lines={suggestion.diff.lines} />
              <div className="confirm-actions">
                <button type="button" onClick={() => setSuggestion(null)}>
                  放弃建议
                </button>
                <button type="button" className="confirm-primary" onClick={() => setConfirming(true)}>
                  确认差异并写入
                </button>
              </div>
            </>
          ) : (
            <span className="provider-id">该建议没有生成可应用的配置差异，仅供参考。</span>
          )}
        </div>
      )}

      <ConfirmDialog
        open={confirming}
        title="确认应用 AI 配置建议"
        description={`即将向服务器 ${instance.name}（${serverId}）派发配置写入任务。写入内容以上方差异为准。`}
        confirmLabel="确认写入"
        busy={llmOperation?.status === "pending"}
        onCancel={() => setConfirming(false)}
        onConfirm={() => void applySuggestion()}
      />
    </article>
  );
}

function buildLocalSuggestion(serverId: string, prompt: string, currentConfig: string): LlmSuggestionView {
  const lines = currentConfig.split("\n");
  const next = [...lines];
  const changed: string[] = [];
  const playerMatch = prompt.match(/(\d+)\s*(?:人|名玩家|players?)/i) ?? prompt.match(/玩家[^\d]*(\d+)/);
  if (playerMatch) {
    const index = next.findIndex((line) => line.startsWith("max-players="));
    if (index >= 0) {
      next[index] = `max-players=${playerMatch[1]}`;
      changed.push(`max-players 调整为 ${playerMatch[1]}`);
    }
  }
  if (/关闭\s*pvp|禁用\s*pvp|pvp.*(off|false|关)/i.test(prompt)) {
    const index = next.findIndex((line) => line.startsWith("pvp="));
    if (index >= 0) {
      next[index] = "pvp=false";
      changed.push("pvp 关闭");
    }
  }
  if (/开启\s*pvp|pvp.*(on|true|开)/i.test(prompt)) {
    const index = next.findIndex((line) => line.startsWith("pvp="));
    if (index >= 0) {
      next[index] = "pvp=true";
      changed.push("pvp 开启");
    }
  }
  const nextContent = next.join("\n");
  if (changed.length === 0) {
    return {
      serverInstanceId: serverId,
      source: "local",
      recommendation: `暂时无法为“${prompt}”生成配置差异。平台 LLM 建议接口尚未提供；本地建议引擎只支持常见字段（如 max-players、pvp）。`
    };
  }
  return {
    serverInstanceId: serverId,
    source: "local",
    recommendation: `根据请求“${prompt}”，建议：${changed.join("；")}。请确认差异后再写入。`,
    diff: buildConfigDiff(serverId, currentConfig, nextContent)
  };
}

export function configDiffViewFromPreview(preview: ServerConfigDiffPreviewResponse): ConfigDiffView {
  const lines = preview.diff.map(configDiffLineFromPreviewLine);
  const added = lines.filter((line) => line.kind === "added").length;
  const removed = lines.filter((line) => line.kind === "removed").length;
  return {
    serverInstanceId: preview.serverInstanceId,
    configVersion: preview.configVersion,
    key: preview.key,
    source: preview.source,
    summary: `+${added} / -${removed} 行变更`,
    lines,
    nextContent: preview.proposedContent ?? "",
    proposedContentInputRef: preview.proposedContentInputRef
  };
}

function configDiffLineFromPreviewLine(line: ConfigDiffLineResponse): ConfigDiffView["lines"][number] {
  return {
    kind: line.kind === "context" ? "same" : line.kind,
    text: line.content
  };
}

interface HistorySectionProps {
  serverId: string;
  serverOperations: PageComponentProps["operations"]["operations"];
  jobs: JobResponse[];
  artifacts: ArtifactResponse[];
}

function HistorySection({ serverId, serverOperations, jobs, artifacts }: HistorySectionProps) {
  return (
    <div className="overview-two-col" aria-label="operation history">
      <article className="console-panel">
        <div className="panel-header">
          <h2>本次会话操作</h2>
        </div>
        {serverOperations.length === 0 ? (
          <EmptyState title="暂无操作记录" description="在本页发起启动、停止、插件控制或配置写入后，这里会显示完整的操作生命周期。" />
        ) : (
          <div className="operation-list">
            {serverOperations.map((operation) => (
              <div key={operation.id} className="operation-item">
                <div className="operation-item-head">
                  <strong>{operation.intent}</strong>
                  <ResultBadge
                    status={operation.status}
                    label={operation.status === "pending" ? "进行中" : operation.status === "succeeded" ? "成功" : "失败"}
                  />
                </div>
                <div className="operation-meta">
                  <span>
                    操作 <code>{operation.id}</code>
                  </span>
                  {operation.jobId && (
                    <span>
                      任务 <code>{operation.jobId}</code>
                      {operation.jobState ? `（${operation.jobState}）` : ""}
                    </span>
                  )}
                  <span>目标 {operation.targetId}</span>
                  <span>发起人 {operation.requester}</span>
                  <span>{new Date(operation.updatedAt).toLocaleString()}</span>
                </div>
                {operation.message && <span className="provider-id">{operation.message}</span>}
                {operation.status === "failed" && operation.errorReason && (
                  <span className="provider-id">
                    失败原因：{operation.errorReason}
                    {operation.diagnosticId ? `（诊断 ${operation.diagnosticId}）` : ""}
                  </span>
                )}
              </div>
            ))}
          </div>
        )}
      </article>
      <article className="console-panel">
        <div className="panel-header">
          <h2>平台任务记录</h2>
        </div>
        {jobs.length === 0 ? (
          <EmptyState title="暂无任务" description="该服务器还没有平台侧任务记录。" />
        ) : (
          <div className="operation-list">
            {jobs.slice(0, 20).map((job) => (
              <div key={job.id} className="operation-item">
                <div className="operation-item-head">
                  <strong>{job.capability}</strong>
                  <span className={cx("status-pill", job.state === "succeeded" ? "status-active" : job.state === "failed" ? "status-error" : "status-disabled")}>
                    {job.state}
                  </span>
                </div>
                <div className="operation-meta">
                  <span>
                    任务 <code>{job.id}</code>
                  </span>
                  <span>进度 {job.progress.percent}%</span>
                  <span>{new Date(job.updatedAt).toLocaleString()}</span>
                </div>
                {job.progress.message && <span className="provider-id">{job.progress.message}</span>}
              </div>
            ))}
          </div>
        )}
      </article>
      <ArtifactDownloadPanel serverId={serverId} artifacts={artifacts} />
    </div>
  );
}

interface ArtifactDownloadPanelProps {
  serverId: string;
  artifacts: ArtifactResponse[];
}

function ArtifactDownloadPanel({ serverId, artifacts }: ArtifactDownloadPanelProps) {
  const [activeId, setActiveId] = useState<string | null>(null);
  const [result, setResult] = useState<Record<string, { status: "pending" | "succeeded" | "failed"; label: string; progress?: number }>>({});

  async function downloadArtifact(artifact: ArtifactResponse) {
    setActiveId(artifact.id);
    setResult((current) => ({ ...current, [artifact.id]: { status: "pending", label: "正在打开制品", progress: 0 } }));
    try {
      const reference = await platformApiClient.openArtifactDownload(artifact.id);
      const chunks: ArrayBuffer[] = [];
      let offset = 0;
      while (offset < reference.sizeBytes) {
        const chunk = await platformApiClient.readArtifactContent(reference.artifactId, offset, reference.chunkSizeBytes);
        chunks.push(chunk.payload);
        offset += chunk.payload.byteLength;
        const progress = Math.min(100, Math.round((offset / reference.sizeBytes) * 100));
        setResult((current) => ({ ...current, [artifact.id]: { status: "pending", label: `传输 ${progress}%`, progress } }));
        if (chunk.payload.byteLength === 0) {
          break;
        }
      }
      openArtifactBlob(reference, chunks);
      setResult((current) => ({ ...current, [artifact.id]: { status: "succeeded", label: `已打开 ${safeArtifactFilename(reference.filename)}`, progress: 100 } }));
    } catch (error) {
      setResult((current) => ({ ...current, [artifact.id]: { status: "failed", label: safeArtifactError(error) } }));
    } finally {
      setActiveId(null);
    }
  }

  return (
    <article className="console-panel">
      <div className="panel-header">
        <h2>
          <PackageOpen size={16} />
          浏览器制品传输
        </h2>
      </div>
      {artifacts.length === 0 ? (
        <EmptyState title="暂无可下载制品" description="该服务器当前没有已完成的可用制品。" />
      ) : (
        <div className="operation-list">
          {artifacts.slice(0, 12).map((artifact) => {
            const itemResult = result[artifact.id];
            return (
              <div key={artifact.id} className="operation-item">
                <div className="operation-item-head">
                  <strong>{artifact.id}</strong>
                  <ResultBadge status={itemResult?.status ?? "pending"} label={itemResult?.label ?? artifact.state} />
                </div>
                <div className="operation-meta">
                  <span>服务器 {serverId}</span>
                  <span>{formatBytes(artifact.sizeBytes)}</span>
                  <span>{artifact.checksum}</span>
                </div>
                {itemResult?.progress !== undefined && <UsageMeter label="传输" percent={itemResult.progress} />}
                <div className="action-strip">
                  <button type="button" className="icon-command" disabled={activeId !== null} onClick={() => void downloadArtifact(artifact)}>
                    <Download size={14} />
                    <span>{activeId === artifact.id ? "传输中" : "打开"}</span>
                  </button>
                </div>
              </div>
            );
          })}
        </div>
      )}
    </article>
  );
}

function openArtifactBlob(reference: ArtifactDownloadReferenceResponse, chunks: ArrayBuffer[]) {
  if (typeof document === "undefined" || typeof URL === "undefined") {
    return;
  }
  const blob = new Blob(chunks, { type: reference.contentType });
  const url = URL.createObjectURL(blob);
  const anchor = document.createElement("a");
  anchor.href = url;
  anchor.download = safeArtifactFilename(reference.filename);
  anchor.rel = "noopener";
  document.body.append(anchor);
  anchor.click();
  anchor.remove();
  URL.revokeObjectURL(url);
}

function safeArtifactFilename(filename: string): string {
  const cleaned = filename.replace(/[\\/]/g, "").trim();
  return cleaned || "artifact.bin";
}

function safeArtifactError(error: unknown): string {
  const message = error instanceof Error ? error.message : "制品传输失败";
  return message.replace(/\/Users\/[^\s]+/g, "[path]").replace(/Bearer\s+[^\s]+/gi, "[token]").replace(/sk-[A-Za-z0-9_-]+/g, "[secret]");
}

function formatBytes(value: number): string {
  if (value < 1024) {
    return `${value} B`;
  }
  if (value < 1024 * 1024) {
    return `${(value / 1024).toFixed(1)} KiB`;
  }
  return `${(value / (1024 * 1024)).toFixed(1)} MiB`;
}