const app = getApp()

const difficultyOptions = [
  { label: '简单', value: 'easy' },
  { label: '普通', value: 'normal' },
  { label: '困难', value: 'hard' },
]

const reviewOrderOptions = [
  { label: '顺序复习', value: 'sequential' },
  { label: '随机复习', value: 'shuffle' },
]

Page({
  data: {
    settings: null,
    loading: false,
    error: '',
    difficultyOptions,
    reviewOrderOptions,
    difficultyIndex: 1,
    reviewOrderIndex: 0,
    difficultyLabel: '普通',
    reviewOrderLabel: '顺序复习',
  },
  onShow() {
    this.loadSettings()
  },
  syncDerivedState(settings) {
    const difficultyIndex = Math.max(0, difficultyOptions.findIndex((item) => item.value === settings.blank_difficulty))
    const reviewOrderIndex = Math.max(0, reviewOrderOptions.findIndex((item) => item.value === settings.review_order))
    this.setData({
      settings,
      difficultyIndex: difficultyIndex >= 0 ? difficultyIndex : 1,
      difficultyLabel: difficultyOptions[difficultyIndex >= 0 ? difficultyIndex : 1].label,
      reviewOrderIndex: reviewOrderIndex >= 0 ? reviewOrderIndex : 0,
      reviewOrderLabel: reviewOrderOptions[reviewOrderIndex >= 0 ? reviewOrderIndex : 0].label,
    })
  },
  loadSettings() {
    if (!app.globalData.openid) {
      this.setData({ error: '请先登录' })
      return
    }
    this.setData({ loading: true, error: '' })
    wx.request({
      url: `${app.globalData.baseUrl}/api/v1/settings`,
      header: { 'X-OpenID': app.globalData.openid },
      success: (res) => {
        this.syncDerivedState(res.data?.data || null)
      },
      fail: () => this.setData({ error: '设置加载失败' }),
      complete: () => this.setData({ loading: false }),
    })
  },
  onBlankCountInput(e) {
    const value = Number(e.detail.value || 0)
    this.setData({
      settings: {
        ...this.data.settings,
        blank_count: Number.isFinite(value) ? value : 0,
      },
    })
  },
  onDifficultyChange(e) {
    const index = Number(e.detail.value)
    const option = difficultyOptions[index] || difficultyOptions[1]
    this.setData({
      difficultyIndex: index,
      difficultyLabel: option.label,
      settings: {
        ...this.data.settings,
        blank_difficulty: option.value,
      },
    })
  },
  onReviewOrderChange(e) {
    const index = Number(e.detail.value)
    const option = reviewOrderOptions[index] || reviewOrderOptions[0]
    this.setData({
      reviewOrderIndex: index,
      reviewOrderLabel: option.label,
      settings: {
        ...this.data.settings,
        review_order: option.value,
      },
    })
  },
  toggleSetting(e) {
    const key = e.currentTarget.dataset.key
    const settings = { ...this.data.settings }
    settings[key] = settings[key] ? 0 : 1
    this.setData({ settings })
  },
  save() {
    if (!app.globalData.openid) {
      wx.showToast({ title: '请先登录', icon: 'none' })
      return
    }
    const settings = this.data.settings || {}
    wx.request({
      url: `${app.globalData.baseUrl}/api/v1/settings`,
      method: 'PUT',
      header: { 'Content-Type': 'application/json', 'X-OpenID': app.globalData.openid },
      data: settings,
      success: () => wx.showToast({ title: '已保存', icon: 'success' }),
      fail: () => wx.showToast({ title: '保存失败', icon: 'none' }),
    })
  },
})