import { closeToast, showToast } from "vant";
import { nextTick, reactive } from "vue";
import { OpenSheetMusicDisplay } from "../osmd-extended/src";
import { metronomeData } from "./helpers/metronome";
import { GradualNote, GradualTimes, GradualVersion } from "./type";
import { handleEndEvaluat, handleStartEvaluat } from "./view/evaluating";
import { IFingering } from "src/view/fingering/fingering-config";
import { handleStartTick } from "./view/tick";
import { audioListStart, getAudioCurrentTime, getAudioDuration, setAudioCurrentTime, setAudioPlaybackRate } from "./view/audio-list";
import { toggleFollow } from "./view/follow-practice";
import { browser, setStorageSpeed } from "./utils";
import { api_createMusicPlayer } from "./helpers/communication";
import { verifyCanRepeat } from "./helpers/formateMusic";

/** 入门 | 进阶 | 大师 */
export type IDifficulty = "BEGINNER" | "ADVANCED" | "PERFORMER";
/** 渲染类型: 五线谱,简谱 */
export enum EnumMusicRenderType {
  /** 五线谱 */
  staff = "staff",
  /** 简谱 */
  firstTone = "firstTone",
  /** 固定音高 */
  fixedTone = "fixedTone",
}
export const musicscoresettingKey = "musicscoresetting";
/** 有声音的是那个音源 */
export type IPlayState = "music" | "background";
/** 播放状态 */
export type IAudioState = "play" | "paused";

/** 来源 */
export enum IPlatform {
  APP = "APP",
  PC = "PC",
}

const state = reactive({
  /** 来源 : PC , app */
  platform: "" as IPlatform,
  appName: "" as "GYM" | "COLEXIU",
  musicRenderType: EnumMusicRenderType.staff as EnumMusicRenderType,
  /**曲谱是否渲染完成 */
  musicRendered: false,
  /** 当前曲谱数据ID, 和曲谱ID不一致 */
  detailId: "",
  /** 曲谱资源URL */
  xmlUrl: "",
  /** 声部ID */
  subjectId: 0 as number,
  trackId: 0 as string | number,
  /** 分类ID */
  categoriesId: 0,
  /** 分类名称 */
  categoriesName: "",
  /** 是否支持评测 */
  enableEvaluation: true,
  /** 是否支持转谱 */
  enableNotation: false,
  /** 曲谱ID */
  examSongId: "",
  /** 曲谱名称 */
  examSongName: "",
  /** 曲谱封面 */
  coverImg: "",
  /** 扩展字段 */
  extConfigJson: {} as any,
  /** 扩展样式字段 */
  extStyleConfigJson: {} as any,
  /** 是否开启节拍器 */
  isOpenMetronome: false,
  /** 是否显示指法 */
  isShowFingering: false,
  /** 原音 */
  music: "",
  /** 伴奏 */
  accompany: "",
  /** midiURL */
  midiUrl: "",
  /** 父分ID */
  parentCategoriesId: 0,
  /** 分类ID */
  musicSheetCategoriesId: 0,
  /** 资源类型: mp3 | midi */
  playMode: "MP3" as "MP3" | "MIDI",
  /** 设置的速度 */
  speed: 0,
  /** 曲谱音频正常的速度 */
  originSpeed: 0,
  /** 分轨名称 */
  track: "",
  /** 当前显示声部索引 */
  partIndex: 0,
  /** 是否需要节拍器 */
  needTick: false,
  /** 曲谱实例 */
  osmd: null as unknown as OpenSheetMusicDisplay,
  /**是否是特殊乐谱类型, 主要针对管乐迷  */
  isSpecialBookCategory: false,
  /** 播放状态 */
  playState: "paused" as IAudioState,
  /** 播放结束状态 */
  playEnd: false,
  /** 播放那个: 原音,伴奏 */
  playSource: "music" as IPlayState,
  /** 播放进度 */
  playProgress: 0,
  /** 激活的note index */
  activeNoteIndex: 0,
  /** 激活的小节 */
  activeMeasureIndex: 0,
  /** 选段状态 */
  sectionStatus: false,
  /** 选段数据 */
  section: [] as any[],
  /** 选段背景 */
  sectionBoundingBoxs: [] as any[],
  /** 开启选段预备 */
  isOpenPrepare: false,
  /** 选段预备 */
  sectionFirst: null as any,
  /** 音符数据 */
  times: [] as any[],
  /** 播放模式 */
  modeType: "practise" as "practise" | "follow" | "evaluating",
  /** 设置 */
  setting: {
    /** 效音提醒 */
    soundEffect: true,
    /** 护眼模式 */
    eyeProtection: false,
    /** 摄像头 */
    camera: false,
    /** 摄像头透明度 */
    cameraOpacity: 70,
    /** 循环播放 */
    repeatAutoPlay: true,
    /** 显示指法 */
    displayFingering: true,
    /** 显示光标 */
    displayCursor: true,
    /** 频率 */
    frequency: 442,
    /** 评测难度 */
    evaluationDifficulty: "ADVANCED" as IDifficulty,
    /** 保存到相册 */
    saveToAlbum: true,
    /** 开启伴奏 */
    enableAccompaniment: true,
    /** 反应时间 */
    reactionTimeMs: 0,
  },
  /** 节拍器的时间 */
  fixtime: 0,
  /** 指法信息 */
  fingeringInfo: {} as IFingering,
  /** 滚动容器的ID */
  scrollContainer: "musicAndSelection",
  /** 是否是打击乐 */
  isPercussion: false,
  /** 是否重复节拍器的时间 */
  repeatedBeats: 0,
  /**当前曲谱中所有声部名字 */
  partListNames: [] as any,
  /** 渐变速度信息 */
  gradual: [] as GradualNote[],
  /** 渐变速度版本 */
  gradualVersion: GradualVersion.BASE as GradualVersion,
  /** 渐变时间信息 */
  gradualTimes: null as GradualTimes,
  /** 单声部多声轨 */
  multitrack: 0,
  /** 缩放 */
  zoom: 0.8,
  /** 渲染曲谱比例 */
  musicZoom: 1,
  /** 练习,评测是否是选段模式 */
  isSelectMeasureMode: false,
  /** 是否是评分显示 */
  isReport: false,
  /** 是否隐藏评测报告弹窗，保存演奏按钮，默认不隐藏 */
  isHideEvaluatReportSaveBtn: false,
  /** 是否是合奏 */
  isConcert: false,
  /** 用户选择的结束小节数 */
  userChooseEndIndex: 0,
  /** 重播小节集合信息 */
  repeatInfo: [],  
});
const browserInfo = browser();
let offset_duration = 0;
/** 自定义数据 */
export const customData = reactive({
  /** 自定义音符时值 */
  customNoteRealValue: [] as any,
  /** 自定义音符按读取到的时值 */
  customNoteCurrentTime: false,
});
/** 在渲染前后计算光标应该走到的音符 */
const setStep = () => {
  if (state.playState !== "play") {
    console.log("暂停播放");
    return;
  }
  let startTime = Date.now();
  requestAnimationFrame(() => {
    const endTime = Date.now();
    // 渲染时间大于16.6,就会让页面卡顿, 如果渲染时间大与16.6就下一个渲染帧去计算
    if (endTime - startTime < 16.7) {
      handlePlaying();
      setStep();
    } else {
      setTimeout(() => {
        handlePlaying();
        setStep();
      }, 16.7);
    }
  });
};
/** 开始播放 */
export const onPlay = () => {
  console.log("开始播放");
  state.playEnd = false;
  offset_duration = browserInfo.xiaomi ? 0.2 : 0.08;
  setStep();
};

/** 播放模式结束自动重播 */
const autoResetPlay = () => {
  if (state.modeType !== "practise") return;
  skipNotePlay(0, true);
  // 没有开启自动重播, 不是练习模式
  if (!state.setting.repeatAutoPlay) return;
  scrollViewNote();
  setTimeout(() => {
    togglePlay("play");
  }, 1000);
};

/** 播放完成事件 */
export const onEnded = () => {
  console.log("音频播放结束");
  // 修改状态为结束
  state.playEnd = true;
  state.playState = "paused";
  // 结束播放
  audioListStart(state.playState);
  // 调用结束评测
  handleEndEvaluat(true);
  // 调用自动重复播放
  autoResetPlay();
};

/**
 * 播放一直触发的事件
 */
const handlePlaying = () => {
  const currentTime = getAudioCurrentTime();
  const duration = getAudioDuration();
  state.playProgress = (currentTime / duration) * 100;
  let item = getNote(currentTime);
  // console.log(11111,currentTime,duration,state.playSource, item.i)
  if (item) {
    // 选段状态下
    if (state.sectionStatus && state.section.length === 2) {
      // 如果开启了预备拍
      const selectStartItem = state.sectionFirst ? state.sectionFirst : state.section[0];
      const selectEndItem = state.section[1];

      if (Math.abs(selectEndItem.endtime - currentTime) < offset_duration) {
        console.log("选段播放结束");
        // 如果为选段评测模式
        if (state.modeType === "evaluating" && state.isSelectMeasureMode) {
          onEnded();
          return;
        }
        // #8698 bug修复
        if (state.modeType === "practise" && state.sectionStatus && !state.setting.repeatAutoPlay) {
          onEnded();
          resetPlaybackToStart();
          return;
        }
        item = selectStartItem;
        setAudioCurrentTime(selectStartItem.time, selectStartItem.i);
      }
    }
    gotoNext(item);
  }

  metronomeData.metro?.sound(currentTime);
};
/** 跳转到指定音符开始播放 */
export const skipNotePlay = (itemIndex: number, isStart = false) => {
  const item = state.times[itemIndex];
  let itemTime = item.time;
  if (isStart) {
    itemTime = 0;
  }
  if (item) {
    setAudioCurrentTime(itemTime, itemIndex);
    gotoNext(item);
    metronomeData.metro?.sound(itemTime);
  }
};

/**
 * 切换曲谱播放状态
 * @param playState 可选: 默认 undefined, 需要切换的状态 play:播放, paused: 暂停
 */
export const togglePlay = async (playState?: "play" | "paused") => {
  state.playState = playState ? playState : state.playState === "paused" ? "play" : "paused";
  if (state.playState === "play" && state.sectionStatus && state.section.length == 2 && state.playProgress === 0) {
    resetPlaybackToStart();
  }
  // 设置为开始播放时, 如果需要节拍,先播放节拍器
  if (state.playState === "play" && state.needTick) {
    const tickend = await handleStartTick();
    // console.log("🚀 ~ tickend:", tickend)
    // 节拍器返回false, 取消播放
    if (!tickend) {
      state.playState = "paused";
      return false;
    }
  }
  // 如果选段没有结束, 直接开始播放,清空选段状态
  if (state.playState == "play") {
    if (state.sectionStatus && state.section.length < 2) {
      clearSelection();
    }
  }
  audioListStart(state.playState);
  return true;
};
/** 结束播放 */
export const handleStopPlay = () => {
  state.playState = "paused";
  audioListStart(state.playState);
};

/** 重置播放为开始 */
export const resetPlaybackToStart = () => {
  // 如果为选段状态
  if (state.sectionStatus && state.section.length === 2) {
    state.section = formateSelectMearure(state.section);
    return;
  }
  skipNotePlay(0, true);
};

/** 跳转到指定音符 */
export const gotoCustomNote = (index: number) => {
  try {
    state.osmd.cursor.reset();
  } catch (error) {}
  for (let i = 0; i < index; i++) {
    state.osmd.cursor.next();
  }
};
const setCursorPosition = (note: any, cursor: any) => {
  if (state.musicRenderType === EnumMusicRenderType.firstTone || state.musicRenderType === EnumMusicRenderType.fixedTone) {
    nextTick(() => {
      let bbox = note.bbox;
      if (!bbox) {
        const musicContainer = document.getElementById("musicAndSelection")?.getBoundingClientRect() || {
          x: 0,
          y: 0,
        };
        const parentLeft = musicContainer.x || 0;
        const noteEle = document.querySelector(`#vf-${note.svgElement?.attrs?.id}`);
        if (noteEle) {
          const noteHead = noteEle.querySelector(".vf-numbered-note-head");
          const noteHeadBbox = noteHead?.getBoundingClientRect?.();
          if (noteHeadBbox) {
            note.bbox = {
              left: noteHeadBbox.x - parentLeft - noteHeadBbox.width / 4,
              width: noteHeadBbox.width * 1.5,
            };
            bbox = note.bbox;
          }
        }
      }
      if (!bbox) return;
      const baseW = state.platform === IPlatform.PC ? 29 : 18;
      const width = (bbox.width - baseW) / 3;
      // console.log(555555,bbox.left,width)
      cursor.cursorElement.style.left = bbox.left + "px";
      cursor.cursorElement.style.transform = `translateX(${width}px)`;
    });
  }
};
/** 跳转到下一个音符 */
export const gotoNext = (note: any) => {
  // console.log(33333333333,state.activeNoteIndex,note.i)
  const num = note.i;

  if (state.activeNoteIndex === note.i) {
    try {
      setCursorPosition(note, state.osmd.cursor);
    } catch (error) {
      console.log(error);
    }
    return;
  }
  
  const osmd = state.osmd;
  let prev = state.activeNoteIndex;
  state.activeNoteIndex = num;
  state.activeMeasureIndex = note.MeasureNumberXML;

  if (prev && num - prev === 1) {
    osmd.cursor.next();
  } else if (prev && num - prev > 0) {
    while (num - prev > 0) {
      prev++;
      osmd.cursor.next();
    }
  } else {
    gotoCustomNote(num);
  }
  try {
    setCursorPosition(note, state.osmd.cursor);
  } catch (error) {
    console.log(error);
  }

  scrollViewNote();
};
/** 获取指定音符 */
export const getNote = (currentTime: number) => {
  const times = state.times;
  const len = state.times.length;
  /** 播放超过了最后一个音符的时间,直接结束, 2秒误差 */
  if (currentTime > times[len - 1].endtime + 2) {
    onEnded();
    return;
  }
  let _item = null as any;
  for (let i = state.activeNoteIndex; i < len; i++) {
    const item = times[i];
    const prevItem = times[i - 1];
    if (currentTime >= item.time) {
      if (!prevItem || item.time != prevItem.time) {
        _item = item;
      }
    } else {
      break;
    }
  }
  // console.log("activeNoteIndex", currentTime, state.activeNoteIndex, _item.i);
  return _item;
};

/** 重播 */
export const handleResetPlay = () => {
  resetPlaybackToStart();
  // 如果是暂停, 直接播放
  togglePlay("play");
};
/** 设置速度 */
export const handleSetSpeed = (speed: number) => {
  setStorageSpeed(state.examSongId, speed);
  state.speed = speed;
};
/** 清除选段状态 */
export const clearSelection = () => {
  state.sectionStatus = false;
  state.section = [];
  closeToast();
};

/** 开启选段 */
export const handleChangeSection = () => {
  // 如果开启了选段,再次点击取消选段
  if (state.sectionStatus) {
    togglePlay("paused");
    skipNotePlay(0, true);
    clearSelection();
    return;
  }
  state.sectionStatus = true;
  // 开启
  if (state.sectionStatus) {
    togglePlay("paused");
  }
  showToast({
    message: "请选择开始小节",
    duration: 0,
    position: "top",
    className: "selectionToast",
  });
};

/** 效验并格式化选段小节 */
const formateSelectMearure = (_list: any[]): any[] => {
  if (!_list.length) return [];
  const list = _list.sort((a, b) => a.time - b.time);
  const startXml = list[0]?.measureOpenIndex;
  const endXml = list.last()?.measureOpenIndex;
  const selectStartMeasure = state.times.filter((n: any) => startXml === n.measureOpenIndex) || [];
  const selectEndMeasure = state.times.filter((n: any) => endXml === n.measureOpenIndex) || [];
  // 没有找到选段小节
  if (!selectStartMeasure.length || !selectEndMeasure.length) {
    clearSelection();
    return [];
  }
  list[0] = selectStartMeasure[0];
  list[1] = selectEndMeasure.last();
  let startItemINdex = list[0].i;
  // 开启预备拍
  if (state.isOpenPrepare) {
    const startXmlIndex = list[0].MeasureNumberXML;
    state.sectionFirst = state.times.find((n: any) => startXmlIndex - n.MeasureNumberXML === 1);
    startItemINdex = state.sectionFirst ? state.sectionFirst.i : startItemINdex;
  }
  skipNotePlay(startItemINdex, startItemINdex === 0);
  return list;
};

/** 选择选段 */
export const handleSelection = (item: any) => {
  if (!state.sectionStatus || state.section.length > 1) return;
  if (state.section.length !== 2 && item) {
    state.section.push(item);
    if (state.section.length === 2) {
      state.section = formateSelectMearure(state.section);
      closeToast();
    }
  }
  if (state.section.length === 1) {
    showToast({
      message: "请选择结束小节",
      duration: 0,
      position: "top",
      className: "selectionToast",
    });
  }
};

/** 阶段练习、阶段评测设置选段小节 */
export const setSection = (start: number, end: number, userSpeed?: number) => {
  const startNotes = state.times.filter(
    (n: any) => n.noteElement.sourceMeasure.MeasureNumberXML == start
  )
  const endNotes = state.times.filter(
    (n: any) => n.noteElement.sourceMeasure.MeasureNumberXML == end
  )

  const lastEndId = endNotes[endNotes.length - 1].noteId
  let lastEndNotes = endNotes.filter((n: any) => n.noteId === lastEndId)
  // 是否符合重播规则
  const canRepeatInfo = verifyCanRepeat(start, end)
  const isCanRepeat = canRepeatInfo.canRepeat
  // 如果符合重播规则，但是lastEndNotes长度为1，则需要向前找，直到找到lastEndNotes长度为2
  let currentEndNum: number = end
  const lastEndIndex = state.repeatInfo[canRepeatInfo.repeatIdx]?.end || 0
  while (isCanRepeat && lastEndNotes.length === 1 && lastEndNotes[0].MeasureNumberXML <= lastEndIndex) {
    currentEndNum = currentEndNum - 1
    const newEndNotes = state.times.filter(
      (n: any) => n.noteElement.sourceMeasure.MeasureNumberXML == currentEndNum
    )
    const newLastEndId = newEndNotes[newEndNotes.length - 1].noteId
    lastEndNotes = newEndNotes.filter((n: any) => n.noteId === newLastEndId)
  }

  const endIdx: any = isCanRepeat ? lastEndNotes.length - 1 : 0
  const startNote = startNotes[0]
  // const endNote = endNotes[endNotes.length - 1]
  const endNote = lastEndNotes[endIdx]			
  
  if (startNote && endNote) {
    state.isSelectMeasureMode = true;
    // 设置小节
    hanldeDirectSelection([startNote, endNote]);

    //设置速度
    if (userSpeed) {
      handleSetSpeed(userSpeed);
    }
  }
}	


/** 直接设置选段 */
export const hanldeDirectSelection = (list: any[]) => {
  if (!Array.isArray(list) || list.length !== 2) return;
  state.sectionStatus = true;
  setTimeout(() => {
    state.section = formateSelectMearure(list);
    console.log(333333333,state.section)
  }, 500);
};
let offsetTop = 0;
/**
 * 窗口内滚动到音符的区域
 * @param isScroll 可选: 强制滚动到顶部, 默认: false
 * @returns void
 */
export const scrollViewNote = () => {
  const cursorElement = document.getElementById("cursorImg-0")!;
  const musicAndSelection = document.getElementById(state.scrollContainer)!;
  if (!cursorElement || !musicAndSelection || offsetTop === cursorElement.offsetTop) return;
  offsetTop = cursorElement.offsetTop;
  if (offsetTop > 50) {
    musicAndSelection.scrollTo({
      top: (offsetTop - 50) * state.musicZoom,
      behavior: "smooth",
    });
  } else {
    musicAndSelection.scrollTo({
      top: 0,
      behavior: "smooth",
    });
  }
};

/** 检测是否是节奏练习 */
export const isRhythmicExercises = () => {
  return state.examSongName.indexOf("节奏练习") > -1;
};

/** 重置状态 */
export const handleRessetState = () => {
  if (state.modeType === "evaluating") {
    handleStartEvaluat();
  } else if (state.modeType === "practise") {
    togglePlay("paused");
  } else if (state.modeType === "follow") {
    toggleFollow(false);
  }
};
export default state;

/** 初始化评测音频 */
export const evaluatCreateMusicPlayer = () => {
  return api_createMusicPlayer({
    musicSrc: state.accompany || state.music, // 曲谱音频url
    tuneSrc: "https://oss.dayaedu.com/cloud-coach/1686725501654check_music1_(1).mp3", //效音音频url
  });
};