const app = getApp()

Page({
  data: {
    timeRanges: ['今日', '本周', '本月'],
    activeTimeRange: 0,
    contentTypes: ['单词', '句子'],
    activeContentType: 0,
    modes: ['中文 -> 英文拼写', '英文 -> 中文释义', '英文挖空填空'],
    activeMode: 0,
    onlyReview: true,
    shuffle: false,
    reviewOrder: 'sequential',
    questionCount: 30,
    loading: false,
    error: '',
  },
  onLoad() {
    const plan = app.globalData.reviewPlan
    this.setData({
      activeTimeRange: plan.timeRangeIndex,
      activeContentType: plan.contentTypeIndex,
      activeMode: plan.modeIndex,
      onlyReview: plan.onlyReview,
      shuffle: plan.reviewOrder === 'shuffle' || plan.shuffle,
      reviewOrder: plan.reviewOrder || (plan.shuffle ? 'shuffle' : 'sequential'),
      questionCount: plan.questionCount,
    })
  },
  persistPatch(patch) {
    app.globalData.reviewPlan = { ...app.globalData.reviewPlan, ...patch }
  },
  setTimeRange(e) {
    const activeTimeRange = Number(e.currentTarget.dataset.index)
    this.setData({ activeTimeRange })
    this.persistPatch({ timeRangeIndex: activeTimeRange })
  },
  setContentType(e) {
    const activeContentType = Number(e.currentTarget.dataset.index)
    this.setData({ activeContentType })
    this.persistPatch({ contentTypeIndex: activeContentType })
  },
  setMode(e) {
    const activeMode = Number(e.currentTarget.dataset.index)
    this.setData({ activeMode })
    this.persistPatch({ modeIndex: activeMode })
  },
  toggleOnlyReview() {
    const onlyReview = !this.data.onlyReview
    this.setData({ onlyReview })
    this.persistPatch({ onlyReview })
  },
  toggleShuffle() {
    const shuffle = !this.data.shuffle
    this.setData({ shuffle, reviewOrder: shuffle ? 'shuffle' : 'sequential' })
    this.persistPatch({ shuffle, reviewOrder: shuffle ? 'shuffle' : 'sequential' })
  },
  onQuestionCountInput(e) {
    const questionCount = Number(e.detail.value || 0)
    this.setData({ questionCount })
    this.persistPatch({ questionCount })
  },
  startReview() {
    const scopeTypeMap = ['today', 'week', 'month']
    const contentTypeMap = ['word', 'sentence']
    const questionModeMap = ['A', 'B', 'C']
    const scope_type = scopeTypeMap[this.data.activeTimeRange]
    const content_type = contentTypeMap[this.data.activeContentType]
    const question_mode = questionModeMap[this.data.activeMode]
    const scope_config = {}
    this.setData({ loading: true, error: '' })
    app.ensureLogin().then((authToken) => {
      if (!authToken) {
        this.setData({ loading: false, error: '请先登录后再开始复习' })
        return
      }
      wx.request({
        url: `${app.globalData.baseUrl}/api/v1/review/generate`,
        method: 'POST',
        header: { 'Content-Type': 'application/json', 'X-Auth-Token': authToken },
        data: {
          scope_type,
          scope_config,
          content_type,
          question_mode,
          review_strategy: this.data.onlyReview ? 'review_only' : 'all',
          sort_mode: this.data.reviewOrder === 'shuffle' ? 'shuffle' : 'sequential',
          total_count: this.data.questionCount,
        },
        success: (res) => {
          const session = res.data?.data || null
          if (res.statusCode < 200 || res.statusCode >= 300 || !session?.id) {
            const message = res.data?.detail || res.data?.message || '生成复习会话失败'
            this.setData({ error: message })
            wx.showToast({ title: message, icon: 'none' })
            return
          }
          if (!session.record_ids?.length) {
            const message = '当前条件下没有可复习题目，请切换时间范围或关闭仅复习'
            this.setData({ error: message })
            wx.showToast({ title: message, icon: 'none' })
            return
          }
          app.globalData.reviewSessionMeta = session
          wx.setStorageSync('reviewSessionMeta', session)
          wx.navigateTo({ url: '/pages/review-session/review-session' })
        },
        fail: () => this.setData({ error: '生成复习会话失败' }),
        complete: () => this.setData({ loading: false }),
      })
    })
  },
  goHome() {
    wx.reLaunch({ url: '/pages/index/index' })
  },
  goToReview() {},
  goToMe() {
    wx.navigateTo({ url: '/pages/me/me' })
  },
})