import { PackageCheck, RotateCw } from "lucide-react";
import { useCallback, useEffect, useMemo, useState } from "react";

import { platformApiClient } from "../api/client";
import type { PluginLifecycleInstallationResponse, PluginLifecycleOperation, ServerInstanceResponse } from "../api/types";
import { ErrorState, LoadingState, ResultBadge } from "./StateViews";

interface PluginLifecycleWorkbenchProps {
  pluginId: string;
  pluginName: string;
  operations?: PluginLifecycleOperation[];
  serverId?: string;
  disabled?: boolean;
}

export function PluginLifecycleWorkbench({ pluginId, pluginName, operations = lifecycleOperations, serverId, disabled = false }: PluginLifecycleWorkbenchProps) {
  const [servers, setServers] = useState<ServerInstanceResponse[]>([]);
  const [installations, setInstallations] = useState<PluginLifecycleInstallationResponse[]>([]);
  const [selectedServerId, setSelectedServerId] = useState(serverId ?? "");
  const [operation, setOperation] = useState<PluginLifecycleOperation>(operations[0] ?? "install");
  const [targetVersion, setTargetVersion] = useState("");
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState("");
  const [busy, setBusy] = useState(false);
  const [result, setResult] = useState<{ status: "succeeded" | "failed" | "pending"; label: string } | null>(null);

  const refresh = useCallback(async () => {
    setLoading(true);
    setError("");
    try {
      const [serverResponse, lifecycleResponse] = await Promise.all([
        platformApiClient.listServerInstances(),
        platformApiClient.listPluginLifecycles({ pluginId, ...(serverId ? { serverInstanceId: serverId } : {}) })
      ]);
      const compatibleServers = serverResponse.items.filter((server) => server.pluginId === pluginId && (!serverId || server.id === serverId));
      setServers(compatibleServers);
      setInstallations(lifecycleResponse.items);
      setSelectedServerId((current) => current || compatibleServers[0]?.id || "");
    } catch (caught) {
      setError(caught instanceof Error ? caught.message : "插件生命周期加载失败");
    } finally {
      setLoading(false);
    }
  }, [pluginId, serverId]);

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

  const installation = useMemo(() => installations.find((item) => item.serverInstanceId === selectedServerId), [installations, selectedServerId]);

  async function submit() {
    if (!selectedServerId || busy) return;
    setBusy(true);
    setResult({ status: "pending", label: `${lifecycleOperationLabel(operation)}提交中…` });
    try {
      const response = await platformApiClient.runPluginLifecycle(pluginId, {
        serverInstanceId: selectedServerId,
        operation,
        targetVersion: targetVersion.trim() || undefined,
        idempotencyKey: `web:plugin.lifecycle:${pluginId}:${selectedServerId}:${operation}:${Date.now()}`
      });
      const evidence = [response.job?.id && `任务 ${response.job.id}`].filter(Boolean).join(" · ");
      setResult({ status: response.status === "queued" || response.status === "accepted" ? "succeeded" : response.status === "deferred" ? "pending" : "failed", label: `${lifecycleOperationLabel(operation)}：${response.status}${evidence ? ` · ${evidence}` : ""}` });
      await refresh();
    } catch (caught) {
      setResult({ status: "failed", label: caught instanceof Error ? caught.message : "插件生命周期操作失败" });
    } finally {
      setBusy(false);
    }
  }

  return (
    <div className="plugin-lifecycle-workbench" aria-label={`${pluginName} production lifecycle`}>
      <div className="panel-header">
        <h3><PackageCheck size={15} /> 生产生命周期</h3>
        <button type="button" className="icon-command" disabled={loading || busy} onClick={() => void refresh()} title="刷新插件生命周期"><RotateCw size={14} /><span>刷新</span></button>
      </div>
      {result && <ResultBadge status={result.status} label={result.label} />}
      {loading && <LoadingState label="正在同步插件生命周期…" compact />}
      {!loading && error && <ErrorState title="插件生命周期不可用" reason={error} diagnosticId={`plugin-lifecycle:${pluginId}`} onRetry={() => void refresh()} compact />}
      {!loading && !error && (
        <>
          <div className="server-toolbar plugin-lifecycle-controls">
            <select aria-label="生命周期服务器" value={selectedServerId} disabled={Boolean(serverId) || busy} onChange={(event) => setSelectedServerId(event.target.value)}>
              {servers.length === 0 && <option value="">暂无匹配服务器</option>}
              {servers.map((server) => <option key={server.id} value={server.id}>{server.name} · {server.id}</option>)}
            </select>
            <select aria-label="生命周期操作" value={operation} disabled={busy} onChange={(event) => setOperation(event.target.value as PluginLifecycleOperation)}>
              {operations.map((item) => <option key={item} value={item}>{lifecycleOperationLabel(item)}</option>)}
            </select>
            {(operation === "install" || operation === "upgrade") && <input aria-label="目标版本" placeholder="目标版本" value={targetVersion} disabled={busy} onChange={(event) => setTargetVersion(event.target.value)} />}
            <button type="button" className="primary-command" disabled={disabled || busy || !selectedServerId} onClick={() => void submit()}>{busy ? "提交中…" : "执行"}</button>
          </div>
          {installation ? (
            <div className="console-record plugin-lifecycle-state">
              <div className="console-record-head"><strong>{installation.currentState} → {installation.desiredState}</strong><span className="status-pill status-active">{installation.compatibility || "pending"}</span></div>
              <div className="console-record-meta">
                <span>当前 {installation.currentVersion || "--"}</span><span>目标 {installation.targetVersion || "--"}</span><span>依赖 {installation.dependencyState || "unknown"}</span>
                {installation.jobId && <span>任务 {installation.jobId}</span>}
              </div>
              {installation.failureReason && <p className="operation-error">{installation.failureReason}</p>}
            </div>
          ) : <p className="console-empty-note">该服务器尚无插件生命周期记录。</p>}
        </>
      )}
    </div>
  );
}

const lifecycleOperations: PluginLifecycleOperation[] = ["install", "enable", "disable", "upgrade", "rollback", "retire", "dependency-check"];
function lifecycleOperationLabel(operation: PluginLifecycleOperation) {
  return ({ install: "安装", enable: "启用", disable: "停用", upgrade: "升级", rollback: "回滚", retire: "退役", "dependency-check": "依赖检查" } as Record<PluginLifecycleOperation, string>)[operation];
}