/**
 * 权限检查和引导工具
 * 专门用于检查Android设备的网络和位置权限
 */

/**
 * 检查网络相关权限
 */
export async function checkNetworkPermissions() {
  console.log('🔍 开始检查网络权限...')
  
  const permissionStatus = {
    location: null,
    wifi: null,
    network: null,
    recommendations: []
  }
  
  try {
    // 检查位置权限
    permissionStatus.location = await checkLocationPermission()
    
    // 检查WiFi信息获取能力
    permissionStatus.wifi = await checkWifiInfoAccess()
    
    // 检查网络连接状态
    permissionStatus.network = await checkNetworkAccess()
    
    // 生成权限建议
    permissionStatus.recommendations = generatePermissionRecommendations(permissionStatus)
    
  } catch (error) {
    console.error('❌ 权限检查异常:', error)
    permissionStatus.error = error
  }
  
  return permissionStatus
}

/**
 * 检查位置权限
 */
async function checkLocationPermission() {
  try {
    const result = await new Promise((resolve) => {
      uni.getLocation({
        type: 'wgs84',
        success: (res) => {
          console.log('✅ 位置权限正常')
          resolve({
            granted: true,
            message: '位置权限已授权'
          })
        },
        fail: (err) => {
          console.log('❌ 位置权限被拒绝:', err.errMsg)
          resolve({
            granted: false,
            message: err.errMsg,
            error: err
          })
        }
      })
    })
    
    return result
    
  } catch (error) {
    return {
      granted: false,
      message: '位置权限检查失败',
      error
    }
  }
}

/**
 * 检查WiFi信息获取能力
 */
async function checkWifiInfoAccess() {
  try {
    const result = await new Promise((resolve) => {
      uni.getConnectedWifi({
        success: (res) => {
          console.log('✅ WiFi信息获取正常:', res.SSID)
          resolve({
            accessible: true,
            ssid: res.SSID,
            bssid: res.BSSID,
            message: `已连接WiFi: ${res.SSID}`
          })
        },
        fail: (err) => {
          console.log('❌ WiFi信息获取失败:', err.errMsg)
          resolve({
            accessible: false,
            message: err.errMsg,
            error: err
          })
        }
      })
    })
    
    return result
    
  } catch (error) {
    return {
      accessible: false,
      message: 'WiFi信息检查失败',
      error
    }
  }
}

/**
 * 检查网络连接状态
 */
async function checkNetworkAccess() {
  try {
    const networkType = await uni.getNetworkType()
    
    console.log(`📶 网络类型: ${networkType.networkType}`)
    console.log(`🔗 连接状态: ${networkType.isConnected ? '已连接' : '未连接'}`)
    
    // 测试实际网络连接
    const internetTest = await testInternetConnection()
    
    return {
      type: networkType.networkType,
      connected: networkType.isConnected,
      internetAccess: internetTest.success,
      message: `网络: ${networkType.networkType}, 连接: ${networkType.isConnected ? '是' : '否'}, 互联网: ${internetTest.success ? '正常' : '异常'}`
    }
    
  } catch (error) {
    return {
      type: 'unknown',
      connected: false,
      internetAccess: false,
      message: '网络状态检查失败',
      error
    }
  }
}

/**
 * 测试互联网连接
 */
async function testInternetConnection() {
  try {
    const result = await new Promise((resolve) => {
      uni.request({
        url: 'https://www.baidu.com',
        method: 'HEAD',
        timeout: 3000,
        success: () => {
          resolve({ success: true })
        },
        fail: (err) => {
          resolve({ success: false, error: err.errMsg })
        }
      })
    })
    
    return result
    
  } catch (error) {
    return { success: false, error: error.message }
  }
}

/**
 * 生成权限建议
 */
function generatePermissionRecommendations(status) {
  const recommendations = []
  
  // 位置权限建议
  if (!status.location?.granted) {
    recommendations.push({
      type: 'location',
      priority: 'high',
      title: '需要开启位置权限',
      description: 'Android 13+获取WiFi信息必须有位置权限',
      actions: [
        '打开手机设置 → 应用管理 → StillSense',
        '点击权限管理 → 位置信息',
        '选择"仅在使用中允许"'
      ]
    })
  }
  
  // WiFi信息访问建议
  if (!status.wifi?.accessible) {
    recommendations.push({
      type: 'wifi',
      priority: 'high',
      title: '无法获取WiFi信息',
      description: '可能被小米手机的隐私保护限制',
      actions: [
        '打开设置 → 隐私保护 → 权限管理',
        '找到局域网访问 → StillSense → 允许',
        '关闭"局域网设备防追踪"功能'
      ]
    })
  }
  
  // 网络连接建议
  if (!status.network?.internetAccess) {
    recommendations.push({
      type: 'network',
      priority: 'medium',
      title: '网络连接异常',
      description: '无法访问互联网，可能影响局域网功能',
      actions: [
        '检查WiFi连接是否正常',
        '尝试重新连接WiFi',
        '检查是否需要WiFi认证'
      ]
    })
  }
  
  // 小米手机特殊建议
  const systemInfo = uni.getSystemInfoSync()
  if (systemInfo.brand?.toLowerCase().includes('xiaomi') || 
      systemInfo.brand?.toLowerCase().includes('redmi')) {
    recommendations.push({
      type: 'xiaomi',
      priority: 'high',
      title: '小米手机特殊设置',
      description: '小米MIUI需要额外的权限设置',
      actions: [
        '设置 → 省电与电池 → 关闭省电模式',
        '或将APP添加到省电白名单',
        '设置 → 隐私保护 → 防追踪 → 关闭局域网设备防追踪'
      ]
    })
  }
  
  return recommendations
}

/**
 * 显示权限设置指南
 */
export function showPermissionGuide(recommendations) {
  if (recommendations.length === 0) {
    uni.showToast({
      title: '权限检查通过',
      icon: 'success'
    })
    return
  }
  
  // 构建指南内容
  let guideContent = '📱 权限设置指南:\n\n'
  
  recommendations.forEach((rec, index) => {
    guideContent += `${index + 1}. ${rec.title}\n`
    guideContent += `${rec.description}\n`
    if (rec.actions.length > 0) {
      guideContent += '操作步骤:\n'
      rec.actions.forEach(action => {
        guideContent += `• ${action}\n`
      })
    }
    guideContent += '\n'
  })
  
  uni.showModal({
    title: '权限设置指南',
    content: guideContent,
    confirmText: '我知道了',
    success: (res) => {
      if (res.confirm) {
        console.log('📋 权限设置指南已显示')
      }
    }
  })
}

/**
 * 一键权限检查和指导
 */
export async function runPermissionDiagnosis() {
  console.log('🔍 开始权限诊断...')
  
  uni.showLoading({ title: '检查权限中...' })
  
  try {
    const status = await checkNetworkPermissions()
    uni.hideLoading()
    
    console.log('📋 权限检查结果:', status)
    
    if (status.recommendations.length > 0) {
      showPermissionGuide(status.recommendations)
    } else {
      uni.showToast({
        title: '权限设置正常',
        icon: 'success'
      })
    }
    
    return status
    
  } catch (error) {
    uni.hideLoading()
    console.error('❌ 权限诊断异常:', error)
    uni.showToast({
      title: '权限检查失败',
      icon: 'none'
    })
    return null
  }
}

export default {
  checkNetworkPermissions,
  showPermissionGuide,
  runPermissionDiagnosis
}