"use client";

import { useState } from "react";
import {
  BookOpenText,
  Play,
  Star,
  Video,
} from "lucide-react";

import { ScoreBar } from "@/components/display";
import {
  EmptyState,
  ErrorBanner,
  Loading,
  PageHeading,
} from "@/components/feedback";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { UsageGuide } from "@/components/usage-guide";
import { ApiError } from "@/lib/api";
import { skillVideoApi } from "@/lib/services";

const CATEGORIES = [
  { value: "suture", label: "缝合技术" },
  { value: "catheter", label: "导尿管置入" },
  { value: "venipuncture", label: "静脉穿刺" },
  { value: "intubation", label: "气管插管" },
  { value: "cpr", label: "心肺复苏" },
  { value: "physical-exam", label: "体格检查" },
  { value: "aseptic", label: "无菌操作" },
  { value: "surgical-scrub", label: "外科刷手" },
];

export default function SkillVideoPage() {
  const [videos, setVideos] = useState<any[]>([]);
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const [query, setQuery] = useState("");

  async function search() {
    setLoading(true);
    setError(null);
    try {
      const res = await skillVideoApi.search({ query: query || undefined });
      setVideos(Array.isArray(res) ? res : []);
    } catch (err) {
      setError(err instanceof ApiError ? err.message : "加载失败");
    } finally {
      setLoading(false);
    }
  }

  return (
    <div className="space-y-6">
      <PageHeading
        icon={<Video className="size-5" />}
        title="技能视频"
        description="手术与操作技能视频学习，支持分段自评与关键点标记。"
      />

      <UsageGuide
        steps={[
          { title: "选择技能类型", detail: "浏览或搜索缝合、穿刺、插管等临床操作视频。" },
          { title: "观看学习", detail: "视频支持分段播放，关键步骤自动高亮提示。" },
          { title: "标记要点", detail: "在关键时间点添加个人笔记与操作要点。" },
          { title: "自我评估", detail: "观看后根据视频标准进行自评，记录能力成长。" },
        ]}
        tip="建议结合临床模拟模块进行反复练习，视频学习后尽早到模拟环境或临床场景中实操。"
      />

      <Card>
        <CardHeader>
          <CardTitle>视频检索</CardTitle>
        </CardHeader>
        <CardContent>
          <div className="flex flex-wrap gap-2">
            {CATEGORIES.map((c) => (
              <Button
                key={c.value}
                variant="outline"
                size="sm"
                onClick={() => {
                  setQuery(c.label);
                  search();
                }}
              >
                {c.label}
              </Button>
            ))}
          </div>
          <div className="mt-4 flex gap-2">
            <Input
              value={query}
              onChange={(e) => setQuery(e.target.value)}
              placeholder="搜索技能名称，如：清创缝合"
              className="max-w-md"
            />
            <Button onClick={search} disabled={loading}>
              {loading ? "搜索中…" : "搜索"}
            </Button>
          </div>
          {error && <div className="mt-4"><ErrorBanner message={error} /></div>}
        </CardContent>
      </Card>

      <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-3">
        {loading ? (
          <Loading />
        ) : videos.length === 0 ? (
          <div className="sm:col-span-2 lg:col-span-3">
            <EmptyState message="暂无视频记录，请先添加视频或搜索。" />
          </div>
        ) : (
          videos.map((v: any, i: number) => (
            <Card key={v.id ?? i} className="overflow-hidden">
              <div className="relative aspect-video bg-muted">
                <div className="absolute inset-0 flex items-center justify-center">
                  <Button size="icon" variant="secondary" className="rounded-full">
                    <Play className="size-5" />
                  </Button>
                </div>
                {v.duration && (
                  <Badge variant="secondary" className="absolute bottom-2 right-2">
                    {v.duration}
                  </Badge>
                )}
              </div>
              <CardContent className="p-4">
                <p className="text-sm font-semibold text-foreground">{v.title ?? `视频 ${i + 1}`}</p>
                <p className="mt-1 text-xs text-muted-foreground">
                  {v.category && (
                    <Badge variant="outline" className="mr-1">
                      {CATEGORIES.find((c) => c.value === v.category)?.label ?? v.category}
                    </Badge>
                  )}
                  {v.description}
                </p>
                {v.myScore != null && (
                  <div className="mt-3">
                    <ScoreBar label="我的自评" score={v.myScore} tone="primary" />
                  </div>
                )}
                <div className="mt-3 flex items-center gap-1 text-xs text-muted-foreground">
                  <BookOpenText className="size-3" />
                  {v.noteCount ?? 0} 条笔记
                  <Star className="ml-2 size-3" />
                  {v.favorite ? "已收藏" : "未收藏"}
                </div>
              </CardContent>
            </Card>
          ))
        )}
      </div>
    </div>
  );
}