const app = getApp()

Page({
  data: {
    userId: '',
    connected: false,
    activeTab: 'conv',
    conversations: [],
    friends: [],
    messages: [],
    currentTarget: '',
    currentChatType: 'SINGLE',
    inputText: '',
  },

  onLoad() {
    const sdk = app.globalData.sdk
    const userId = app.globalData.userId
    this.setData({ userId })

    sdk.on('connected', () => this.setData({ connected: true }))
    sdk.on('disconnected', () => this.setData({ connected: false }))
    sdk.on('message', (msg) => this.handleMessage(msg))
    sdk.on('revoke', ({ msgId }) => this.handleRevoke(msgId))

    this.loadConversations()
    this.loadFriends()
  },

  onUnload() {
    app.globalData.sdk?.disconnect()
  },

  handleMessage(msg) {
    const messages = [...this.data.messages, msg]
    this.setData({ messages })
  },

  handleRevoke(msgId) {
    const messages = this.data.messages.map(m =>
      m.id === msgId ? { ...m, revoked: true, content: '' } : m
    )
    this.setData({ messages })
  },

  async loadConversations() {
    try {
      const conversations = await app.globalData.sdk.listConversations()
      this.setData({ conversations })
    } catch (err) {
      console.error('loadConversations failed', err)
    }
  },

  async loadFriends() {
    try {
      const friends = await app.globalData.sdk.listFriends()
      this.setData({ friends })
    } catch (err) {
      console.error('loadFriends failed', err)
    }
  },

  switchTab(e) {
    this.setData({ activeTab: e.currentTarget.dataset.tab })
  },

  selectConv(e) {
    const { id, type } = e.currentTarget.dataset
    this.setData({ currentTarget: id, currentChatType: type, messages: [] })
    this.loadHistory(id, type)
  },

  startChat(e) {
    const id = e.currentTarget.dataset.id
    this.setData({ currentTarget: id, currentChatType: 'SINGLE', messages: [] })
    this.loadHistory(id, 'SINGLE')
  },

  async loadHistory(targetId, chatType) {
    try {
      const result = await app.globalData.sdk.fetchHistory(targetId, { page: 0, size: 50 })
      this.setData({ messages: result.content || [] })
    } catch (err) {
      console.error('loadHistory failed', err)
    }
  },

  onInput(e) {
    this.setData({ inputText: e.detail.value })
  },

  sendText() {
    const { inputText, currentTarget, currentChatType } = this.data
    if (!inputText.trim() || !currentTarget) return
    app.globalData.sdk.send({
      toId: currentTarget,
      chatType: currentChatType,
      msgType: 'TEXT',
      content: inputText.trim(),
    })
    this.setData({ inputText: '' })
  },
})