const app = getApp()

const deckTemplate = [
  { word: 'prosperity', meaning: 'n. 繁荣, 兴旺', answer: 'pe' },
  { word: 'sustainable', meaning: 'adj. 可持续的', answer: 'sus' },
  { word: 'acquire', meaning: 'v. 获取, 获得', answer: 'ac' },
  { word: 'abstract', meaning: 'adj. 抽象的', answer: 'ab' },
  { word: 'benevolent', meaning: 'adj. 仁慈的', answer: 'be' },
]

Page({
  data: {
    progress: 0,
    current: 1,
    total: 0,
    word: '',
    meaning: '',
    answer: '',
    feedback: '',
    showFeedback: false,
    completed: false,
    masterHint: false,
  },
  onLoad() {
    if (!app.globalData.reviewSession.deck.length) {
      const { questionCount, shuffle } = app.globalData.reviewPlan
      let deck = deckTemplate.slice(0, Math.max(1, Math.min(questionCount, deckTemplate.length)))
      if (shuffle) deck = deck.slice().sort(() => Math.random() - 0.5)
      app.globalData.reviewSession = {
        deck,
        currentIndex: 0,
        correctCount: 0,
        wrongCount: 0,
        completed: false,
        currentAnswer: '',
      }
    }
    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?.word || '',
      meaning: current?.meaning || '',
      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
    const correct = (this.data.answer || '').trim().toLowerCase() === current.answer.toLowerCase()
    session.correctCount += correct ? 1 : 0
    session.wrongCount += correct ? 0 : 1
    this.setData({
      feedback: correct ? '回答正确' : `正确答案：${current.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.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' })
  },
})