import { useEffect, useMemo, useState, useRef } from "react";
import { useNavigate, useParams } from "react-router-dom";
import {
  Image,
  Video,
  type VideoAnchor,
  type VideoRef,
  LetterToLuxun,
  StudyGuideModal,
} from "@/components";
import { getBackgroundImage, getPublicPath, getStaticImage } from "@/lib/utils";
import { SuccessAlert } from "@/components/layout";
import {
  MultipleChoiceQuizPanel,
  SingleChoiceQuizPanel,
} from "@/components/layout/quiz";
import { GuideSteps, GuideStepsItem } from "@/components";

type QuizOption = {
  value: string;
  label: string;
  isCorrect?: boolean;
  explanation?: string;
};

type QuizAnchor = {
  id: string;
  time: number;
  title: string;
  prompt: string;
  type: "single" | "multiple";
  options: QuizOption[];
  explanation?: string;
};

const starName = "luxun";

// 锚点数据：根据视频时长调整 time
const QUIZ_ANCHORS: QuizAnchor[] = [
  {
    id: "quiz-1",
    time: 155, // 2:35
    title: "题目1",
    prompt: "以下属于鲁迅先生作品的是( )。",
    type: "multiple",
    options: [
      { value: "A", label: "孔乙己", isCorrect: true },
      { value: "B", label: "药", isCorrect: true },
      { value: "C", label: "狂人日记", isCorrect: true },
      { value: "D", label: "阿Q正传", isCorrect: true },
    ],
  },
  {
    id: "quiz-2",
    time: 355, // 5:55
    title: "题目2",
    prompt: "对于鼓励和培养青年一代，鲁迅先生的做法是( )。",
    type: "multiple",
    options: [
      { value: "A", label: "组织文学社团", isCorrect: true },
      { value: "B", label: "木刻运动", isCorrect: true },
      { value: "C", label: "写纪念烈士文章", isCorrect: true },
      {
        value: "D",
        label: "让青年都去参军",
      },
    ],
    explanation:
      "虽然鲁迅热爱革命，但他主要通过文学社团、木刻艺术和纪念文章来教育和启发青年，而不是通过参军来培养青年。",
  },
  {
    id: "quiz-3",
    time: 420, // 7:00
    title: "题目3",
    prompt: "以下那句诗出自鲁迅的作品( )。",
    type: "single",
    options: [
      { value: "A", label: "寄意寒星荃不察，我以我血荐轩辕", isCorrect: true },
      {
        value: "B",
        label: "我自横刀向天笑，去留肝胆两昆仑",
        explanation: "出自谭嗣同《狱中题壁》",
      },
      {
        value: "C",
        label: "此去泉台招旧部，旌旗十万斩阎罗",
        explanation: "出自陈毅《梅岭三章》",
      },
      {
        value: "D",
        label: "雄关漫道真如铁，而今迈步从头越",
        explanation: "出自毛泽东《忆秦娥·娄山关》",
      },
    ],
  },
];

const LuxunInternalization = () => {
  const navigate = useNavigate();
  const { moduleName } = useParams<{ moduleName: string }>();
  const [activeSuccess, setActiveSuccess] = useState<string | null>(null);
  const [successContent, setSuccessContent] = useState<string>("");
  const [resumeCallback, setResumeCallback] = useState<(() => void) | null>(
    null
  );
  const [visible, setVisible] = useState(false);
  const [showVideo, setShowVideo] = useState(false);
  const [postGuideVisible, setPostGuideVisible] = useState(false);
  const [showLetter, setShowLetter] = useState(false);
  const [showStudyGuide, setShowStudyGuide] = useState(false);
  const videoRef = useRef<VideoRef>(null);

  useEffect(() => {
    setVisible(true);
  }, []);

  const handleVideoCanPlay = () => {
    if (showVideo && videoRef.current) {
      videoRef.current.play().catch((error) => {
        console.warn("视频播放失败:", error);
      });
    }
  };

  const anchors: VideoAnchor[] = useMemo(
    () =>
      QUIZ_ANCHORS.map((item) => {
        const correctAnswers = item.options
          .filter((opt) => opt.isCorrect)
          .map((opt) => opt.value);

        // 单选题处理
        if (item.type === "single") {
          return {
            id: item.id,
            time: item.time,
            once: true,
            afterResume: "remove",
            render: ({ resume }) => (
              <>
                <SingleChoiceQuizPanel
                  visible={activeSuccess !== item.id}
                  zIndex={10000}
                  title={`${item.title}（单选题）：${item.prompt}`}
                  options={item.options.map((opt) => ({
                    value: opt.value,
                    label: `${opt.value}. ${opt.label}`,
                  }))}
                  correctAnswer={correctAnswers[0]}
                  errorMessage="再思考一下，选择正确答案。"
                  onSubmit={(value: string, isCorrect: boolean) => {
                    if (isCorrect) {
                      setActiveSuccess(item.id);
                      setSuccessContent("回答正确，请继续探索。");
                      setResumeCallback(() => resume);
                    }
                  }}
                />
                <SuccessAlert
                  visible={activeSuccess === item.id}
                  title="恭喜你, 选择正确!"
                  content={successContent}
                  onContinue={() => {
                    setActiveSuccess(null);
                    setSuccessContent("");
                    const cb = resumeCallback;
                    setResumeCallback(null);
                    cb?.();
                  }}
                />
              </>
            ),
          };
        }

        // 多选题处理
        if (item.type === "multiple") {
          return {
            id: item.id,
            time: item.time,
            once: true,
            afterResume: "remove",
            render: ({ resume }) => (
              <>
                <MultipleChoiceQuizPanel
                  visible={activeSuccess !== item.id}
                  zIndex={10000}
                  title={`${item.title}（多选题）：${item.prompt}`}
                  options={item.options.map((opt) => ({
                    value: opt.value,
                    label: `${opt.value}. ${opt.label}`,
                  }))}
                  correctAnswer={correctAnswers}
                  errorMessage={
                    item.explanation || "再思考一下，注意选择所有正确答案。"
                  }
                  onSubmit={(values: string[], isCorrect: boolean) => {
                    if (isCorrect) {
                      setActiveSuccess(item.id);
                      setSuccessContent("回答正确，请继续探索。");
                      setResumeCallback(() => resume);
                    }
                  }}
                />
                <SuccessAlert
                  visible={activeSuccess === item.id}
                  title="恭喜你, 选择正确!"
                  content={successContent}
                  onContinue={() => {
                    setActiveSuccess(null);
                    setSuccessContent("");
                    const cb = resumeCallback;
                    setResumeCallback(null);
                    cb?.();
                  }}
                />
              </>
            ),
          };
        }

        return {
          id: item.id,
          time: item.time,
          once: true,
          afterResume: "remove",
          render: () => null,
        };
      }),
    [activeSuccess, resumeCallback, successContent]
  );

  if (!moduleName) return null;

  return (
    <div
      className="relative h-full w-full bg-black"
      style={{
        backgroundImage: getBackgroundImage("components/internalization/bg"),
      }}
    >
      {/* 离开按钮 */}
      <Image
        className="absolute right-8 top-8 z-10"
        src={getStaticImage("components/离开")}
        button
        onClick={() => navigate(`/${moduleName}/${starName}/home`)}
      />

      {showVideo && (
        <Video
          ref={videoRef}
          src={getPublicPath("video/luxun/luxun_neihua.mp4")}
          className="h-full w-full"
          anchors={anchors}
          playsInline
          controls
          onCanPlay={handleVideoCanPlay}
          onEnded={() => {
            setShowVideo(false);
            setPostGuideVisible(true);
          }}
        />
      )}

      {/* 引导 */}
      <GuideSteps
        visible={visible}
        onVisibleChange={(visible) => {
          setVisible(visible);
          if (!visible) {
            setShowVideo(true);
            handleVideoCanPlay();
          }
        }}
        showMask={false}
      >
        <GuideStepsItem speaker="guide">
          小沪，关于"首在立人"走进上海鲁迅故居的红砖小楼，解锁了先生从绍兴到上海的文学足迹，我们读懂了他以笔为刃的战斗姿态，也见证了他与进步人士的革命情谊。
        </GuideStepsItem>
        <GuideStepsItem speaker="guide">
          那些针砭时弊的杂文、借古讽今的篇章，还有藏在6平方米客房里的红色坚守，都在诉说着先生的热忱。
        </GuideStepsItem>
        <GuideStepsItem speaker="guide">
          1907年，鲁迅先生在《文化偏至论》里写到：“是故将生存两间，角逐列国是务，其首在立人，人立而后凡事举；若其道术，乃必尊个性而张精神。”
        </GuideStepsItem>
        <GuideStepsItem speaker="guide">
          先生认为，中华民族要屹立于世界民族之林，“首在立人”，“立人”思想从此贯穿在鲁迅先生的人生和作品中。”先生认为，中华民族要屹立于世界民族之林，“首在立人”，“立人”思想从此贯穿在鲁迅先生的人生和作品中。
        </GuideStepsItem>
        <GuideStepsItem speaker="student">
          小沪，关于"首在立人"这四个字我还是有些不理解，立人为什么这么重要？
        </GuideStepsItem>
        <GuideStepsItem speaker="guide">
          "首在立人"这四个字，可以说是鲁迅先生一生的价值观。今天我们有幸邀请到了上海鲁迅纪念馆研究馆员施晓燕。关于你的问题，我想施老师会给你指点迷津！
        </GuideStepsItem>
      </GuideSteps>

      {/* 视频结束后的引导 */}
      <GuideSteps
        visible={postGuideVisible}
        onVisibleChange={(visible) => {
          setPostGuideVisible(visible);
          if (!visible) {
            setShowLetter(true);
          }
        }}
        showMask={false}
        zIndex={60}
      >
        <GuideStepsItem speaker="guide">
          听完施老师的讲解，相信你对鲁迅先生的"立人"精神有了更深的理解。现在，就请你把这份感悟写下来，既总结参观的收获，也给自己未来许下一个承诺吧！
        </GuideStepsItem>
      </GuideSteps>

      {/* 信件组件 */}
      <LetterToLuxun
        visible={showLetter}
        onSubmit={(values: string[]) => {
          console.log("提交信件", values);
          setShowLetter(false);
          setShowStudyGuide(true);
        }}
      />

      <StudyGuideModal
        visible={showStudyGuide}
        onContinue={() => {
          setShowStudyGuide(false);
          navigate(`/${moduleName}/${starName}/home`);
        }}
      >
        恭喜你已经顺利完成了鲁迅故居的学习，至此，你已经完成了本课程所有故居的学习，
        希望你能有所收获，学习八位名人的优秀品质和精神，在新时代为中华民族伟大复兴发光发热！
      </StudyGuideModal>
    </div>
  );
};

export default LuxunInternalization;