const Timer = require('../../utils/timer')
const storage = require('../../utils/storage')
const planMod = require('../../utils/plan')
const themeMod = require('../../utils/theme')
const iconsMod = require('../../utils/icons')
const voice = require('../../utils/voice')
const { countUp } = require('../../utils/countUp')
const config = require('../../config')
Page({
  data: {
    theme: { primary: '#FF6B35', primaryLight: '#FF8C5A', primaryBg: '#FFF3ED', primaryRgb: '255,107,53' },
    themeStyle: themeMod.BASE_VARS,
    duration: 60,
    remaining: 0,
    status: 'idle',
    isRunning: false,
    isPaused: false,
    isCompleted: false,
    elapsed: 0,
    goalReached: false,
    hintTip: (config.postureTips && config.postureTips[0]) || '',
    todayTarget: 0,
    planDay: 1,
    isFreeMode: false,
    celebrationLevel: 'normal',  // normal / first / milestone / record
    celebrationMessage: '',
    confettiPieces: [],
    // Completion modal (full-screen summary after training ends)
    showCompletion: false,
    showStopConfirm: false,  // 自定义"结束训练"确认弹窗,替代 wx.showModal
    completionElapsed: 0,
    completionTarget: 0,
    completionOvertime: 0,
    completionStreak: 0,
    completionLevel: 'normal',
    completionMessage: '',
    icons: iconsMod.build()
  },

  onLoad(options) {
    themeMod.applyThemeToPage(this)
    this._init(options)
    // 预载语音到本地缓存,训练开始时即可即时播放(仅语音引导开启时)
    const s = storage.getSettings()
    if (s.voiceGuide !== false) voice.preload()
    // countUp: 数字从 0 滚到目标秒数
    const target = this.data.duration
    if (this._countUpTask) this._countUpTask.cancel()
    this._countUpTask = countUp({
      from: 0,
      to: target,
      duration: 600,
      onUpdate: (v) => this.setData({ remaining: v }),
      onComplete: () => { this._countUpTask = null }
    })
  },

  onShow() {
    themeMod.applyThemeToPage(this)
    const theme = themeMod.getCurrentTheme()
    this.setData({ theme, icons: iconsMod.build(theme) })
  },

  _init(options) {
    let target
    let planDay = 1
    let isFreeMode = false

    if (options && options.free) {
      const parsed = parseInt(options.free)
      target = parsed > 0 ? parsed : 60
      isFreeMode = true
    } else {
      const settings = storage.getSettings()
      const allRecords = Object.values(storage.getRecords()).flat()
      const customPlans = storage.getCustomPlans()
      const plan = planMod.getPlan(settings.planId, customPlans)
      planDay = planMod.getPlanDay(settings.planId, allRecords, settings.planStartDate, customPlans)
      target = planMod.getTodayTarget(settings.planId, Math.min(planDay, plan.totalDays), customPlans)
    }

    this.setData({
      duration: target,
      remaining: target,
      todayTarget: target,
      planDay: isFreeMode ? 0 : planDay,
      isFreeMode,
      goalReached: false,
      elapsed: 0
    })

    if (this._timer) {
      this._timer.stop()
      this._timer = null
    }

    // Reset reminder state
    this._halfwaySignaled = false
    this._last30Signaled = false
    this._last10Signaled = false
    this._lastMinuteAt = 0
    this._lastCountdown = 0
    this._saving = false
    this._lastTipIndex = -1
    this._clearVibrateTimers()

    this._timer = new Timer({
      onTick: (tick) => {
        this.setData({
          remaining: tick.remaining > 0 ? tick.remaining : 0,
          elapsed: tick.elapsed
        })
        this._updateHintTip(tick)
        this._remind(tick)
      },
      onGoalReached: () => {
        // Target hit - don't end. Voice prompt only (no vibration, per
        // design); keep counting so the user can train to failure.
        const s = storage.getSettings()
        if (s.voiceGuide !== false) {
          voice.play('goal')
        }
        this.setData({ goalReached: true })
      }
    })
  },

  /**
   * Rotate the posture cue in the hint area every config.tipInterval seconds.
   * Only runs while still under the target (after goalReached the hint
   * switches to the "goal reached" line). Skips setData when the index
   * hasn't changed to avoid per-second re-renders.
   */
  _updateHintTip(tick) {
    if (tick.remaining <= 0) return
    const tips = config.postureTips || []
    if (tips.length === 0) return
    const interval = config.tipInterval || 12
    const idx = Math.floor(tick.elapsed / interval) % tips.length
    if (idx !== this._lastTipIndex) {
      this._lastTipIndex = idx
      this.setData({ hintTip: tips[idx] })
    }
  },

  /**
   * Per-tick reminders: vibration + voice prompts at 4 fixed points.
   * - halfway: once when elapsed reaches half of duration
   * - 30s: once when remaining hits 30
   * - 10s: once when remaining hits 10
   * - complete: fired in finishTraining when the user ends the session
   *
   * Vibration and voice are independently gated by `vibrate` / `voiceGuide`
   * settings — user can mute haptics but keep voice (e.g. in office) or vice versa.
   */
  _remind(tick) {
    const s = storage.getSettings()
    const { remaining, elapsed, duration } = tick
    const vibrate = (n, ms) => {
      // `=== false` (not `!s.vibrate`) so an undefined field (legacy users
      // whose settings predate the toggle) is treated as ON, matching the
      // voiceGuide check below. `!s.vibrate` used to see undefined as falsy
      // and silently skip vibration until the user toggled the switch.
      if (s.vibrate === false) return
      const intensity = s.vibrateIntensity || 'heavy'
      // light/medium = vibrateShort(type); heavy = vibrateLong(400ms).
      // vibrateLong is the most reliable on iOS real devices; the short
      // types are nicer but may be silent on some devices - user picks.
      const doVibrate = () => {
        const fail = (err) => console.warn('[vibrate] failed:', err.errMsg || err)
        if (intensity === 'light') wx.vibrateShort({ type: 'light', fail })
        else if (intensity === 'medium') wx.vibrateShort({ type: 'medium', fail })
        else wx.vibrateLong({ fail })
      }
      try {
        for (let i = 0; i < n; i++) {
          // Track timers so pause/stop/unload can cancel pending bursts
          // instead of firing vibrations on a page that's already torn down.
          const id = setTimeout(() => {
            doVibrate()
            const idx = this._vibrateTimers.indexOf(id)
            if (idx > -1) this._vibrateTimers.splice(idx, 1)
          }, i * (ms + 30))
          this._vibrateTimers.push(id)
        }
      } catch (e) {}
    }

    // Each prompt is gated on a minimum duration so short free-mode
    // trainings don't trigger them at nonsensical times (e.g. firing
    // "最后30秒" on the first tick of a 30s session because remaining
    // happens to equal 30 at elapsed=0).
    //
    // Thresholds chosen so prompts fire in the right ORDER for any
    // duration: halfway first, then last30, then last10.

    // 1. Halfway: needs >=10s total so the midpoint is at least 5s in
    if (duration >= 10 && !this._halfwaySignaled && elapsed >= Math.floor(duration / 2)) {
      this._halfwaySignaled = true
      if (s.voiceGuide !== false) voice.play('halfway')
      vibrate(2, 150)
    }

    // 2. Last 30 seconds: only if duration > 60s so halfway has already passed
    if (duration > 60 && remaining === 30 && !this._last30Signaled) {
      this._last30Signaled = true
      if (s.voiceGuide !== false) voice.play('last30')
    }

    // 3. Last 10 seconds: only if duration > 20s so we have at least 10s of training
    if (duration > 20 && remaining === 10 && !this._last10Signaled) {
      this._last10Signaled = true
      if (s.voiceGuide !== false) voice.play('last10')
    }

    // 4. Countdown buzzes at 5..1: only if duration >= 6s (so we can reach them)
    if (duration >= 6 && remaining <= 5 && remaining > 0 && remaining !== this._lastCountdown) {
      this._lastCountdown = remaining
      vibrate(1, 100)
    }
  },

  /**
   * Cancel any pending vibration timers. Tracked so pause/stop/unload can
   * abort scheduled bursts instead of firing on a torn-down page.
   */
  _clearVibrateTimers() {
    if (!this._vibrateTimers) {
      this._vibrateTimers = []
      return
    }
    this._vibrateTimers.forEach((id) => clearTimeout(id))
    this._vibrateTimers = []
  },

  /**
   * Detect which celebration level to show. Called from _saveAndShowCompletion
   * (runs in finishTraining, BEFORE saveRecord), so stats reflect pre-save state.
   *  - first:     user's very first training ever
   *  - milestone: streak will hit a memorable number after this save
   *  - record:    this duration beats the user's previous max
   *  - normal:    everything else
   */
  _detectCelebrationLevel(elapsed) {
    const stats = storage.getTotalStats()
    const streak = storage.getStreak()
    const nextStreak = (streak.lastDate && streak.count >= 1) ? streak.count + 1 : 1

    if (stats.totalSessions === 0) {
      return { level: 'first', message: '第一次训练!坚持就是胜利' }
    }
    if ([7, 14, 30, 50, 100, 365].includes(nextStreak)) {
      return { level: 'milestone', message: `连续打卡 ${nextStreak} 天!` }
    }
    if (elapsed > stats.maxDuration) {
      return { level: 'record', message: `新纪录!${elapsed}秒` }
    }
    return { level: 'normal', message: '完成!' }
  },

  /**
   * Build the confetti piece list. More pieces + more colors for higher
   * celebration levels. Pieces are pre-positioned so the layout doesn't
   * shift when wx:for renders them.
   */
  _buildConfettiPieces(level) {
    const counts = { normal: 12, record: 24, milestone: 32, first: 40 }
    const count = counts[level] || counts.normal
    const palette = ['#FF6B35', '#FFD93D', '#4CAF50', '#2979FF', '#EC407A', '#7E57C2', '#FF8C5A', '#5C9CFF', '#6EC072', '#A08AD6']
    const pieces = []
    for (let i = 0; i < count; i++) {
      pieces.push({
        left: Math.round((i / count) * 96 + 2),
        color: palette[i % palette.length],
        delay: Math.round(Math.random() * 300) / 1000,
        rotate: Math.round((Math.random() * 90) - 45),
        size: level === 'first' ? 40 : level === 'milestone' ? 36 : 32
      })
    }
    return pieces
  },

  onUnload() {
    voice.stop()
    voice.destroy()
    this._clearVibrateTimers()
    if (this._timer) {
      this._timer.stop()
      this._timer = null
    }
    if (this._countUpTask) {
      this._countUpTask.cancel()
      this._countUpTask = null
    }
    if (this._completionCountUp) {
      this._completionCountUp.cancel()
      this._completionCountUp = null
    }
  },

  onStart() {
    if (this.data.isPaused) {
      this._timer.resume()
      this.setData({ isRunning: true, isPaused: false, status: 'running' })
      return
    }
    if (this.data.isRunning) return
    // 取消可能还在滚的 countUp,确保 remaining = duration
    if (this._countUpTask) {
      this._countUpTask.cancel()
      this._countUpTask = null
      this.setData({ remaining: this.data.duration })
    }
    this._timer.start(this.data.duration)
    this.setData({ isRunning: true, status: 'running' })
    const s = storage.getSettings()
    if (s.voiceGuide !== false) voice.play('start')
  },

  onPause() {
    if (!this.data.isRunning || this.data.isPaused) return
    this._timer.pause()
    voice.stop()
    this._clearVibrateTimers()
    this.setData({ isPaused: true, status: 'paused' })
  },

  onStop() {
    // 用自定义确认弹窗替代 wx.showModal:
    // 系统原生 modal 在 WebView stacking context 下 hit-test 偶发不稳,
    // 自定义 modal + catchtouchmove 与现有 completion-mask 同模式,行为更可靠。
    // 弹窗停留期间暂停计时,避免犹豫时间被计入训练时长
    this._stopWasPaused = this.data.isPaused
    const patch = { showStopConfirm: true }
    if (this.data.isRunning && !this.data.isPaused) {
      this._timer.pause()
      patch.isPaused = true
      patch.status = 'paused'
    }
    this.setData(patch)
  },

  onStopCancel() {
    this.setData({ showStopConfirm: false })
    // 弹窗前若正在计时(被 onStop 暂停),取消后恢复
    if (!this._stopWasPaused && this.data.isRunning) {
      this._timer.resume()
      this.setData({ isRunning: true, isPaused: false, status: 'running' })
    }
  },

  onStopConfirm() {
    this.setData({ showStopConfirm: false })
    this.finishTraining()
  },

  finishTraining() {
    // Guard against double-tap: completion modal shows immediately, so
    // a second tap on the underlying 结束 button is harmless — but we
    // still need to guard the save itself.
    if (this._saving) return

    const elapsed = this._timer.stop()
    this._clearVibrateTimers()
    if (elapsed < 3) {
      wx.showToast({ title: '训练时间太短', icon: 'none', duration: 1500 })
      setTimeout(() => { wx.navigateBack() }, 1500)
      return
    }
    // Completion voice (replaces the old auto-onComplete cue). No vibration.
    const s = storage.getSettings()
    if (s.voiceGuide !== false) {
      voice.play('complete')
    }
    this._saveAndShowCompletion(elapsed)
  },

  /**
   * Persist the just-finished training and pop the big completion modal.
   * Called from finishTraining (the user manually ends; the timer keeps
   * running past the goal until they stop). Detection of "first / record
   * / milestone" uses pre-save stats so the level is decided before the
   * data changes.
   */
  _saveAndShowCompletion(elapsed) {
    // Re-entry guard: protects the finishTraining path so the save never
    // runs twice even if the user double-taps end.
    if (this._saving) return
    this._saving = true

    const { level, message } = this._detectCelebrationLevel(elapsed)
    const confettiPieces = this._buildConfettiPieces(level)

    // Save record + streak
    const today = storage.getToday()
    storage.saveRecord({
      date: today,
      duration: elapsed,
      planId: storage.getSettings().planId,
      day: this.data.planDay
    })
    storage.updateStreak(today)

    // Flag for the index page's "训练完成" highlight
    try { wx.setStorageSync('_last_train_at', Date.now()) } catch (e) {}

    const finalStreak = storage.getStreak().count

    this.setData({
      // Background effects keep playing behind the modal
      status: 'completed',
      isCompleted: true,
      celebrationLevel: level,
      celebrationMessage: message,
      confettiPieces,
      // Modal state
      showCompletion: true,
      completionElapsed: 0,
      completionActualElapsed: elapsed,
      completionTarget: this.data.duration,
      completionOvertime: Math.max(0, elapsed - this.data.duration),
      completionStreak: finalStreak,
      completionLevel: level,
      completionMessage: message
    })

    // Animate the big number from 0 to elapsed
    if (this._completionCountUp) this._completionCountUp.cancel()
    this._completionCountUp = countUp({
      from: 0,
      to: elapsed,
      duration: 1200,
      onUpdate: (v) => this.setData({ completionElapsed: v }),
      onComplete: () => { this._completionCountUp = null }
    })
  },

  onCloseCompletion() {
    if (this._completionCountUp) {
      this._completionCountUp.cancel()
      this._completionCountUp = null
    }
    this.setData({ showCompletion: false })
    setTimeout(() => { wx.navigateBack() }, 280)
  },

  onViewRecords() {
    if (this._completionCountUp) {
      this._completionCountUp.cancel()
      this._completionCountUp = null
    }
    this.setData({ showCompletion: false })
    setTimeout(() => {
      wx.navigateBack({
        success: () => {
          setTimeout(() => wx.switchTab({ url: '/pages/records/records' }), 100)
        }
      })
    }, 280)
  },

  onTrainAgain() {
    // Reset the timer to idle so the user can start a new session right
    // here (no need to navigate back and re-tap 开始).
    if (this._completionCountUp) {
      this._completionCountUp.cancel()
      this._completionCountUp = null
    }
    // Reset per-session state so the next run fires reminders/saves
    // correctly (previously these stayed set, muting cues on the 2nd run).
    this._saving = false
    this._halfwaySignaled = false
    this._last30Signaled = false
    this._last10Signaled = false
    this._lastMinuteAt = 0
    this._lastCountdown = 0
    this._lastTipIndex = -1
    this._clearVibrateTimers()
    this._countUpTask = null
    this.setData({
      showCompletion: false,
      isCompleted: false,
      status: 'idle',
      isRunning: false,
      isPaused: false,
      remaining: this.data.duration,
      elapsed: 0,
      goalReached: false
    })
  },

  // No-op handler for catchtouchmove. Swallows move events that would
  // otherwise bubble to underlying timer page controls (causing missed
  // taps on the completion modal).
  onNoop() { /* swallow */ },

  /**
   * 分享给朋友。训练完成弹窗里的分享按钮会走到这里,标题里拼上用户
   * 刚才撑了多久,转化率更高;右上角"···"菜单也共用同一份文案。
   */
  onShareAppMessage() {
    const elapsed = this.data.completionActualElapsed || this.data.duration
    const s = config.share.timer
    return {
      title: s.titleTemplate.replace('{elapsed}', elapsed),
      path: s.path
    }
  },

  /**
   * 分享到朋友圈,同样带上刚完成的时长晒成绩。
   */
  onShareTimeline() {
    const elapsed = this.data.completionActualElapsed || this.data.duration
    return {
      title: config.share.timer.timelineTitleTemplate.replace('{elapsed}', elapsed)
    }
  }
})