// 自由创作·任务卡:生成中(shimmer+平滑进度) / 失败(中文错误+重试) / 完成(悬停播放+操作)。
import { useRef } from "react";
import { Download, Heart, RotateCcw, Trash2 } from "lucide-react";
import type { FreeVideoTask } from "../../types";
import { MODE_LABELS, STATUS_LABELS, isInFlight, modelLabel } from "./constants";
import { isPublicGenerationError, presentGenerationError } from "../../generation-error";

function ratioStyle(ratio: string) {
  const [w, h] = ratio.split(":").map(Number);
  return { aspectRatio: w && h ? `${w} / ${h}` : "16 / 9" };
}

function ratioCopy(ratio: string) {
  const [w, h] = ratio.split(":").map(Number);
  if (!w || !h) return ratio;
  if (w === h) return `方形 ${ratio}`;
  return `${w > h ? "横屏" : "竖屏"} ${ratio}`;
}

function statusTag(status: string) {
  if (status === "succeeded") return { cls: "green", label: "已完成" };
  if (status === "failed" || status === "cancelled") return { cls: "danger", label: status === "cancelled" ? "已取消" : "失败" };
  return { cls: "blue", label: STATUS_LABELS[status] || "生成中" };
}

export function GenerationCard({ task, progress, onOpen, onRetry, onToggleFavorite, onDelete, onDownload }: {
  task: FreeVideoTask;
  progress: number;
  onOpen: () => void;
  onRetry: () => void;
  onToggleFavorite: () => void;
  onDelete: () => void;
  onDownload: () => void;
}) {
  const videoRef = useRef<HTMLVideoElement>(null);
  const inFlight = isInFlight(task.status);
  const failed = task.status === "failed" || task.status === "cancelled";
  const done = task.status === "succeeded" && !!task.video_url;
  const tag = statusTag(task.status);
  const errorText = isPublicGenerationError(task.error)
    ? (() => { const presentation = presentGenerationError(task.error); return `${presentation.title}：${presentation.description}`; })()
    : task.error_message || "视频生成失败，请重试";

  return (
    <article className={`fc-card${done ? " done" : ""}`}>
      <div
        className="fc-card-media"
        style={ratioStyle(task.aspect_ratio)}
        role={done ? "button" : undefined}
        tabIndex={done ? 0 : undefined}
        onClick={done ? onOpen : undefined}
        onKeyDown={done ? (event) => { if (event.key === "Enter") onOpen(); } : undefined}
        onMouseEnter={() => { if (done) void videoRef.current?.play().catch(() => undefined); }}
        onMouseLeave={() => { videoRef.current?.pause(); if (videoRef.current) videoRef.current.currentTime = 0; }}
      >
        {inFlight && (
          <div className="fc-card-generating">
            <span className="spinner" />
            <div className="fc-progress"><span style={{ width: `${Math.min(progress, 95)}%` }} /></div>
            <span>{STATUS_LABELS[task.status] || "生成中"} · {Math.round(Math.min(progress, 95))}%</span>
          </div>
        )}
        {failed && (
          <div className="fc-card-failed">
            <span className="fc-tag danger">失败</span>
            <p>{errorText}</p>
            <div className="fc-failed-actions">
              <button type="button" className="fc-mini" onClick={(event) => { event.stopPropagation(); onRetry(); }}>
                <RotateCcw size={13} /> 重试
              </button>
              <button type="button" className="fc-mini" title="删除" onClick={(event) => { event.stopPropagation(); onDelete(); }}>
                <Trash2 size={13} /> 删除
              </button>
            </div>
          </div>
        )}
        {done && (
          <>
            <video
              ref={videoRef}
              src={task.video_url}
              poster={task.thumbnail_url || undefined}
              muted
              loop
              playsInline
              preload="metadata"
            />
            <span className="fc-dur">{task.duration}s</span>
            <div className="fc-card-hover">
              <button type="button" className="fc-hover-btn" title="下载" onClick={(event) => { event.stopPropagation(); onDownload(); }}>
                <Download size={14} />
              </button>
              <button type="button" className={`fc-hover-btn${task.is_favorited ? " fav" : ""}`} title={task.is_favorited ? "取消收藏" : "收藏"} onClick={(event) => { event.stopPropagation(); onToggleFavorite(); }}>
                <Heart size={14} fill={task.is_favorited ? "currentColor" : "none"} />
              </button>
              <button type="button" className="fc-hover-btn danger" title="删除" onClick={(event) => { event.stopPropagation(); onDelete(); }}>
                <Trash2 size={14} />
              </button>
            </div>
          </>
        )}
        {task.status === "succeeded" && !task.video_url && (
          <div className="fc-card-failed">
            <p>视频链接已失效{task.fallback_note ? `(${task.fallback_note})` : ""}</p>
          </div>
        )}
      </div>
      <div className="fc-card-meta">
        <h3 title={task.prompt}>{task.prompt || "未命名视频"}</h3>
        <p>{MODE_LABELS[task.mode] || task.mode} · {task.duration} 秒 · {ratioCopy(task.aspect_ratio)}</p>
        <div className="fc-card-line">
          <span className={`fc-tag ${tag.cls}`}>{tag.label}</span>
          <span className="fc-tag">{modelLabel(task.model)}</span>
        </div>
        {inFlight && (
          <div className="fc-progress-mini"><span style={{ width: `${Math.min(progress, 95)}%` }} /></div>
        )}
      </div>
    </article>
  );
}