const app = getApp()

Page({
  data: {
    progress: 0,
    current: 1,
    total: 0,
    word: '',
    meaning: '',
    answer: '',
    feedback: '',
    showFeedback: false,
    completed: false,
    masterHint: false,
    questions: [],
  },
  onLoad() {
    this.loadQuestions()
  },
  loadQuestions() {
    const session = app.globalData.reviewSessionMeta
    if (!session) return
    wx.request({
      url: `${app.globalData.baseUrl}/api/v1/review/questions?session_id=${session.id}`,
      header: { 'X-OpenID': app.globalData.openid || '' },
      success: (res) => {
        const questions = res.data || []
        app.globalData.reviewSession = { deck: questions, currentIndex: 0, correctCount: 0, wrongCount: 0, completed: false, currentAnswer: '' }
        this.setData({ questions })
        this.syncSession()
      },
    })
  },
  syncSession() {
    const session = app.globalData.reviewSession
    const current = session.deck[session.currentIndex]
    const total = session.deck.length || 1
    this.setData({
      progress: Math.round((session.currentIndex / total) * 100),
      current: session.currentIndex + 1,
      total,
      word: current?.prompt || '',
      meaning: current?.answer_hint || '',
      answer: session.currentAnswer || '',
      feedback: '',
      showFeedback: false,
      completed: session.completed,
      masterHint: false,
    })
  },
  onAnswerInput(e) {
    const answer = e.detail.value
    app.globalData.reviewSession.currentAnswer = answer
    this.setData({ answer })
  },
  checkAnswer() {
    const session = app.globalData.reviewSession
    const current = session.deck[session.currentIndex]
    if (!current) return
    wx.request({
      url: `${app.globalData.baseUrl}/api/v1/review/submit`,
      method: 'POST',
      header: { 'Content-Type': 'application/json', 'X-OpenID': app.globalData.openid || '' },
      data: {
        session_id: app.globalData.reviewSessionMeta.id,
        entry_id: current.entry_id,
        question_mode: current.question_mode,
        user_answer: this.data.answer,
      },
      success: (res) => {
        const result = res.data || {}
        session.correctCount += result.is_correct ? 1 : 0
        session.wrongCount += result.is_correct ? 0 : 1
        this.setData({
          feedback: result.is_correct ? '回答正确' : `正确答案：${result.correct_answer}`,
          showFeedback: true,
        })
      },
    })
  },
  nextQuestion() {
    const session = app.globalData.reviewSession
    if (!session.deck.length) return
    if (session.currentIndex >= session.deck.length - 1) {
      session.completed = true
      wx.request({
        url: `${app.globalData.baseUrl}/api/v1/review/finish?session_id=${app.globalData.reviewSessionMeta.id}`,
        method: 'POST',
        header: { 'X-OpenID': app.globalData.openid || '' },
        success: () => wx.navigateTo({ url: '/pages/review-result/review-result' }),
      })
      return
    }
    session.currentIndex += 1
    session.currentAnswer = ''
    this.syncSession()
  },
  markMastered() {
    this.setData({ masterHint: true })
    wx.showToast({ title: '已标记', icon: 'success' })
  },
})