/**
 * Soul创业派对 - 扫码解析页
 * 扫描二维码/条形码，展示解析内容
 */
const app = getApp()

Page({
  data: {
    statusBarHeight: 44,
    // 最近一次解析结果
    lastResult: null,
    scanType: '',
    charSet: '',
    // 小程序码解析（路径、参数）
    parsedPath: null,
    parsedQuery: [],
    canNavigate: false,
    // 历史记录
    history: []
  },

  onLoad() {
    this.setData({
      statusBarHeight: app.globalData.statusBarHeight || 44
    })
    this.loadHistory()
  },

  loadHistory() {
    try {
      const history = wx.getStorageSync('scanHistory') || []
      this.setData({ history })
    } catch (e) {
      console.log('加载扫码历史失败:', e)
    }
  },

  saveToHistory(result, scanType, charSet) {
    const item = { result, scanType, charSet, time: new Date().toLocaleString() }
    let history = wx.getStorageSync('scanHistory') || []
    history = [item, ...history].slice(0, 10)
    wx.setStorageSync('scanHistory', history)
    this.setData({ history })
  },

  // 解析小程序码内容：path?key=val 或 path
  parseMiniProgramCode(result) {
    if (!result || typeof result !== 'string') return { path: null, query: [], canNavigate: false }
    const idx = result.indexOf('?')
    let path = idx >= 0 ? result.slice(0, idx) : result
    const qs = idx >= 0 ? result.slice(idx + 1) : ''
    path = path.replace(/^\//, '').trim()
    const query = []
    if (qs) {
      qs.split('&').forEach(pair => {
        const eq = pair.indexOf('=')
        const k = eq >= 0 ? pair.slice(0, eq) : pair
        const v = eq >= 0 ? pair.slice(eq + 1) : ''
        try {
          if (k) query.push({ key: decodeURIComponent(k), value: decodeURIComponent(v) })
        } catch (_) {
          if (k) query.push({ key: k, value: v })
        }
      })
    }
    const isMiniProgramPath = /^pages\/[\w-]+\/[\w-]+$/.test(path)
    return { path: path || null, query, canNavigate: isMiniProgramPath }
  },

  // 发起扫码（支持小程序码）
  doScan() {
    wx.scanCode({
      onlyFromCamera: false,
      scanType: ['qrCode', 'barCode'],
      success: (res) => {
        const { result, scanType, charSet } = res
        const parsed = this.parseMiniProgramCode(result)
        this.setData({
          lastResult: result,
          scanType: scanType || '未知',
          charSet: charSet || '',
          parsedPath: parsed.path,
          parsedQuery: parsed.query,
          canNavigate: parsed.canNavigate
        })
        this.saveToHistory(result, scanType, charSet)
      },
      fail: (err) => {
        if (err.errMsg && err.errMsg.includes('cancel')) {
          return
        }
        wx.showToast({ title: err.errMsg || '扫码失败', icon: 'none' })
      }
    })
  },

  // 复制内容
  copyResult() {
    const { lastResult } = this.data
    if (!lastResult) {
      wx.showToast({ title: '暂无解析内容', icon: 'none' })
      return
    }
    wx.setClipboardData({
      data: lastResult,
      success: () => wx.showToast({ title: '已复制', icon: 'success' })
    })
  },

  // 清空当前结果
  clearResult() {
    this.setData({
      lastResult: null, scanType: '', charSet: '',
      parsedPath: null, parsedQuery: [], canNavigate: false
    })
  },

  // 打开解析出的小程序页面
  openParsedPage() {
    const { parsedPath, parsedQuery } = this.data
    if (!parsedPath || !this.data.canNavigate) {
      wx.showToast({ title: '非本小程序页面', icon: 'none' })
      return
    }
    const queryStr = parsedQuery.length
      ? '?' + parsedQuery.map(q => `${encodeURIComponent(q.key)}=${encodeURIComponent(q.value)}`).join('&')
      : ''
    const url = `/${parsedPath}${queryStr}`
    const tabPages = ['pages/index/index', 'pages/chapters/chapters', 'pages/match/match', 'pages/my/my']
    if (tabPages.includes(parsedPath)) {
      wx.switchTab({ url: `/${parsedPath}` })
    } else {
      wx.navigateTo({ url })
    }
  },

  // 清空历史
  clearHistory() {
    wx.setStorageSync('scanHistory', [])
    this.setData({ history: [], lastResult: null, scanType: '', charSet: '' })
    wx.showToast({ title: '已清空', icon: 'success' })
  },

  // 点击历史项复制
  onHistoryItemTap(e) {
    const result = e.currentTarget.dataset.result
    if (!result) return
    wx.setClipboardData({
      data: result,
      success: () => wx.showToast({ title: '已复制', icon: 'success' })
    })
  },

  goBack() {
    wx.navigateBack()
  }
})