const { request } = require('../../utils/request')

const app = getApp()

Page({
  data: {
    userName: '',
    userSub: '',
    avatarChar: '?',
    question: '',
    quickPrompts: [
      { key: 'policy', icon: '📖', label: '政策解读', prompt: '请解读一下最新的财税政策要点。' },
      { key: 'rule',   icon: '📋', label: '制度问答', prompt: '我想了解报销制度的具体流程。' }
    ],
    drawerOpen: false,
    sessions: [],
    sessionsLoading: false
  },

  onLoad() {
    const token = app.globalData.token || wx.getStorageSync('token')
    if (!token) {
      wx.redirectTo({ url: '/pages/login/login' })
      return
    }
    const user = app.globalData.user || wx.getStorageSync('user') || {}
    const userName = user.name || user.phone || ''
    const userSub = user.name && user.phone ? user.phone : ''
    const avatarChar = (userName || '?').trim().charAt(0).toUpperCase() || '?'
    this.setData({ userName, userSub, avatarChar })
  },

  onQuestionInput(e) {
    this.setData({ question: e.detail.value })
  },

  onQuickTap(e) {
    const key = e.currentTarget.dataset.key
    const hit = (this.data.quickPrompts || []).find((q) => q.key === key)
    if (!hit) return
    this._toChat({ question: hit.prompt })
  },

  submit() {
    const text = (this.data.question || '').trim()
    if (!text) return
    this._toChat({ question: text })
  },

  goChatAttach() {
    this._toChat({ attach: 1 })
  },
  goChatVoice() {
    this._toChat({ voice: 1 })
  },

  _toChat(payload) {
    app.globalData.chatPending = payload || {}
    wx.navigateTo({ url: '/pages/chat/chat' })
  },

  // ---------------- 抽屉 ----------------
  openDrawer() {
    this.setData({ drawerOpen: true })
    this._loadSessions()
  },
  closeDrawer() {
    this.setData({ drawerOpen: false })
  },
  async _loadSessions() {
    this.setData({ sessionsLoading: true })
    try {
      const list = await request('/api/chat/sessions')
      const items = (list || []).map((s) => Object.assign({}, s, { _time: this._formatTime(s.last_message_at || s.created_at) }))
      this.setData({ sessions: items })
    } catch (e) {
      wx.showToast({ title: '历史加载失败：' + e.message, icon: 'none' })
    } finally {
      this.setData({ sessionsLoading: false })
    }
  },
  _formatTime(iso) {
    if (!iso) return ''
    const d = new Date(iso)
    if (isNaN(d.getTime())) return ''
    const pad = (n) => (n < 10 ? '0' + n : '' + n)
    const now = new Date()
    if (d.getFullYear() === now.getFullYear() && d.getMonth() === now.getMonth() && d.getDate() === now.getDate()) {
      return `${pad(d.getHours())}:${pad(d.getMinutes())}`
    }
    return `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())}`
  },
  onSelectSession(e) {
    const id = e.detail && e.detail.id
    if (!id) return
    this.setData({ drawerOpen: false })
    app.globalData.chatPending = { sid: id }
    wx.navigateTo({ url: '/pages/chat/chat?sid=' + id })
  },

  logout() {
    wx.showModal({
      title: '提示',
      content: '确定退出登录？',
      success: (res) => {
        if (!res.confirm) return
        app.globalData.token = ''
        app.globalData.user = null
        wx.removeStorageSync('token')
        wx.removeStorageSync('user')
        wx.redirectTo({ url: '/pages/login/login' })
      }
    })
  }
})