import type { ReactNode } from "react";

interface ConfirmDialogProps {
  open: boolean;
  title: string;
  description: ReactNode;
  confirmLabel: string;
  danger?: boolean;
  busy?: boolean;
  onConfirm: () => void;
  onCancel: () => void;
  children?: ReactNode;
}

export function ConfirmDialog({ open, title, description, confirmLabel, danger, busy, onConfirm, onCancel, children }: ConfirmDialogProps) {
  if (!open) {
    return null;
  }
  return (
    <div className="confirm-backdrop" role="presentation" onClick={onCancel}>
      <div className="confirm-panel" role="dialog" aria-modal="true" aria-label={title} onClick={(event) => event.stopPropagation()}>
        <h2>{title}</h2>
        <p>{description}</p>
        {children}
        <div className="confirm-actions">
          <button type="button" onClick={onCancel} disabled={busy}>
            取消
          </button>
          <button type="button" className={danger ? "confirm-danger" : "confirm-primary"} onClick={onConfirm} disabled={busy}>
            {busy ? "提交中…" : confirmLabel}
          </button>
        </div>
      </div>
    </div>
  );
}

interface UsageMeterProps {
  label: string;
  percent?: number;
}

export function UsageMeter({ label, percent }: UsageMeterProps) {
  const known = typeof percent === "number" && Number.isFinite(percent);
  const clamped = known ? Math.max(0, Math.min(100, percent)) : 0;
  return (
    <div className="usage-meter">
      <span>{label}</span>
      <span className="usage-meter-track" role="img" aria-label={known ? `${label} ${Math.round(clamped)}%` : `${label} 暂无数据`}>
        {known && <span className={`usage-meter-fill${clamped >= 85 ? " usage-high" : ""}`} style={{ width: `${clamped}%` }} />}
      </span>
      <span className="usage-meter-value">{known ? `${Math.round(clamped)}%` : "--"}</span>
    </div>
  );
}

interface DiffViewProps {
  lines: Array<{ kind: "same" | "added" | "removed"; text: string }>;
}

export function DiffView({ lines }: DiffViewProps) {
  return (
    <div className="diff-view" role="figure" aria-label="配置变更对比">
      {lines.map((line, index) => (
        <span key={`${index}-${line.text}`} className={`diff-line diff-line-${line.kind}`}>
          <span aria-hidden="true">{line.kind === "added" ? "+" : line.kind === "removed" ? "-" : " "}</span>
          <span>{line.text || " "}</span>
        </span>
      ))}
    </div>
  );
}