var api = require('../../utils/api')
var i18n = require('../../i18n/index')

Page({
  data: {
    statusBarHeight: 44,
    planName: '',
    expiryDate: ''
  },

  onBack: function () {
    wx.navigateBack({
      fail: function () {
        wx.reLaunch({ url: '/pages/index/index' })
      }
    })
  },

  onShow: function () {
    i18n.bind(this)
    this.render()
  },

  // Recompute locale-dependent display strings from stored raw values.
  render: function () {
    this.setData({
      planName: this.planNameFor(this._plan),
      expiryDate: this._expireTime ? this.formatDate(this._expireTime) : ''
    })
  },

  planNameFor: function (plan) {
    if (plan === 'trial') return i18n.t('subSuccess.planTrial')
    if (plan === 'monthly') return i18n.t('subSuccess.planMonthly')
    if (plan === 'yearly') return i18n.t('subSuccess.planYearly')
    return i18n.t('subSuccess.planDefault')
  },

  formatDate: function (raw) {
    var date = new Date(raw)
    var y = date.getFullYear()
    var m = ('0' + (date.getMonth() + 1)).slice(-2)
    var d = ('0' + date.getDate()).slice(-2)
    if (i18n.getLocale() === 'en') return y + '-' + m + '-' + d
    return y + '年' + m + '月' + d + '日'
  },

  onLoad: function (options) {
    var self = this
    var app = getApp()
    self.setData({ statusBarHeight: app.globalData.statusBarHeight })

    var plan = options.plan || 'yearly'
    self._plan = plan

    // Fetch actual subscription expiry from server instead of computing client-side
    api.getSubscription().then(function (res) {
      if (res && res.expire_time) {
        self._expireTime = res.expire_time
      }
      self.render()
    }).catch(function () {
      // Fallback: compute from current date if server call fails
      var durationMap = { yearly: 365, monthly: 30, trial: 7 }
      var now = new Date()
      now.setDate(now.getDate() + (durationMap[plan] || 365))
      self._expireTime = now.getTime()
      self.render()
    })
  },

  onStartSmart: function () {
    wx.navigateTo({ url: '/pages/wear-check/wear-check' })
  },

  onBackHome: function () {
    wx.switchTab({ url: '/pages/index/index' })
  }
})