import { ThumbsUp, X } from "lucide-react";
import { useState } from "react";
import type { Comment, User } from "../types";
import { formatRelativeTime, formatAbsoluteUTC } from "../utils";
import { CommentText } from "./CommentText";

interface CommentListProps {
  author: User;
  createdAt: string | Date;
  comments: Comment[];
}

export function CommentList({ author, createdAt, comments }: CommentListProps) {
  const [previewImage, setPreviewImage] = useState<string | null>(null);

  return (
    <>
      <header className="flex items-center gap-4 mb-5">
        <div className="size-10 rounded-full overflow-hidden bg-zinc-700/60">
          {author.avatar_url ? (
            <img src={author.avatar_url} alt="avatar" className="w-full h-full object-cover" />
          ) : null}
        </div>
        <div>
          <div className="font-medium text-white/95 text-sm sm:text-base">{author.nickname}</div>
          <div className="text-xs text-white/50" title={formatAbsoluteUTC(createdAt)}>
            发布于 {formatRelativeTime(createdAt)}
          </div>
        </div>
      </header>

      <ul className="space-y-4 sm:space-y-5">
        {comments.map((c) => (
          <li key={c.cid} className="flex items-start gap-3 sm:gap-4">
            <div className="size-8 rounded-full overflow-hidden bg-zinc-700/60 shrink-0">
              {c.user.avatar_url ? (
                <img src={c.user.avatar_url} alt="avatar" className="w-full h-full object-cover" />
              ) : null}
            </div>
            <div className="min-w-0 flex-1">
              <div className="flex items-center gap-2">
                <span className="font-medium text-white/95 text-sm">{c.user.nickname}</span>
                <span className="text-xs text-white/50">{formatRelativeTime(c.created_at)}</span>
              </div>
              <p className="mt-1 text-sm leading-relaxed text-white/90 break-words">
                <CommentText text={c.text} />
              </p>
              {c.images && c.images.length > 0 ? (
                <div className="mt-2 grid grid-cols-3 gap-1.5 sm:gap-2">
                  {c.images.map((img, idx) => (
                    <button
                      key={idx}
                      type="button"
                      onClick={() => setPreviewImage(img.url)}
                      className="block overflow-hidden rounded-md bg-zinc-800/60 cursor-pointer hover:opacity-80 transition-opacity"
                      title="点击预览大图"
                    >
                      {/* 以真实比例显示：利用 width/height 属性提供固有尺寸，CSS 设定宽度 100% 高度自适应 */}
                      <img
                        src={img.url}
                        alt="comment-image"
                        width={img.width}
                        height={img.height}
                        className="w-full h-auto"
                        loading="lazy"
                      />
                    </button>
                  ))}
                </div>
              ) : null}
              <div className="mt-2 inline-flex items-center gap-1 text-xs text-white/70">
                <ThumbsUp size={14} />
                <span>{c.digg_count}</span>
              </div>
            </div>
          </li>
        ))}
        {comments.length === 0 ? <li className="text-sm text-white/60">暂无评论</li> : null}
      </ul>

      {/* 图片预览灯箱 */}
      {previewImage && (
        <div
          className="fixed inset-0 z-[100] flex items-center justify-center bg-black/90 backdrop-blur-sm"
          onClick={() => setPreviewImage(null)}
        >
          {/* 关闭按钮 */}
          <button
            type="button"
            className="absolute top-4 right-4 w-10 h-10 rounded-full bg-white/15 text-white border border-white/20 hover:bg-white/25 transition-colors flex items-center justify-center"
            onClick={() => setPreviewImage(null)}
            aria-label="关闭预览"
          >
            <X size={20} />
          </button>

          {/* 大图 */}
          <img
            src={previewImage}
            alt="preview"
            className="max-w-[90vw] max-h-[90vh] object-contain"
            onClick={(e) => e.stopPropagation()}
          />
        </div>
      )}
    </>
  );
}