import axios from 'axios'
import { ElNotification, ElMessageBox, ElMessage, ElLoading } from 'element-plus'
import { getToken } from '@/utils/auth'
import { tansParams, blobValidate } from '@/utils/ruoyi'
import cache from '@/plugins/cache'
import { saveAs } from 'file-saver'
import useUserStore from '@/store/modules/user'

let downloadLoadingInstance;

// 数字债权服务系统专用请求配置
const digitalCreditRequest = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: process.env.VUE_APP_BASE_API,
  // 超时
  timeout: 30000
})

// 请求拦截器
digitalCreditRequest.interceptors.request.use(config => {
  // 是否需要设置 token
  const isToken = (config.headers || {}).isToken === false
  // 是否需要防止数据重复提交
  const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
  
  if (getToken() && !isToken) {
    config.headers['Authorization'] = 'Bearer ' + getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
  }
  
  // 添加数字债权业务标识
  config.headers['X-Business-Module'] = 'digital-credit'
  
  // 添加用户角色信息到请求头
  const userStore = useUserStore()
  if (userStore.roles && userStore.roles.length > 0) {
    config.headers['X-User-Roles'] = userStore.roles.join(',')
  }
  
  // 添加数据范围权限到请求头
  if (userStore.permissions && userStore.permissions.dataScope) {
    config.headers['X-Data-Scope'] = userStore.permissions.dataScope
  }
  
  // get请求映射params参数
  if (config.method === 'get' && config.params) {
    let url = config.url + '?' + tansParams(config.params);
    url = url.slice(0, -1);
    config.params = {};
    config.url = url;
  }
  
  if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
    const requestObj = {
      url: config.url,
      data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
      time: new Date().getTime()
    }
    const sessionObj = cache.session.getJSON('sessionObj')
    if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
      cache.session.setJSON('sessionObj', requestObj)
    } else {
      const s_url = sessionObj.url;                  // 请求地址
      const s_data = sessionObj.data;                // 请求数据
      const s_time = sessionObj.time;                // 请求时间
      const interval = 1000;                         // 间隔时间(ms)，小于此时间视为重复提交
      if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
        const message = '数据正在处理，请勿重复提交';
        console.warn(`[${s_url}]: ` + message)
        return Promise.reject(new Error(message))
      } else {
        cache.session.setJSON('sessionObj', requestObj)
      }
    }
  }
  return config
}, error => {
    console.log(error)
    Promise.reject(error)
})

// 响应拦截器
digitalCreditRequest.interceptors.response.use(res => {
    // 未设置状态码则默认成功状态
    const code = res.data.code || 200;
    // 获取错误信息
    const msg = res.data.msg || res.data.message || '系统未知错误'
    
    // 数字债权业务特定错误处理
    if (code === 'B001') {
      ElMessage({ message: '权限不足，请联系管理员', type: 'error' })
      return Promise.reject(new Error(msg))
    } else if (code === 'B002') {
      ElMessage({ message: '数据不存在或已被删除', type: 'error' })
      return Promise.reject(new Error(msg))
    } else if (code === 'B003') {
      ElMessage({ message: '当前操作不被允许', type: 'error' })
      return Promise.reject(new Error(msg))
    } else if (code === 'B004') {
      ElMessage({ message: '数据已存在，请勿重复操作', type: 'warning' })
      return Promise.reject(new Error(msg))
    }
    
    // 二进制数据则直接返回
    if (res.request.responseType ===  'blob' || res.request.responseType ===  'arraybuffer') {
      return res.data
    }
    
    if (code === 401) {
      if (!isRelogin.show) {
        isRelogin.show = true;
        ElMessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', { confirmButtonText: '重新登录', cancelButtonText: '取消', type: 'warning' }).then(() => {
          isRelogin.show = false;
          useUserStore().logOut().then(() => {
            location.href = '/index';
          })
        }).catch(() => {
          isRelogin.show = false;
        });
      }
      return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
    } else if (code === 500) {
      ElMessage({ message: msg, type: 'error' })
      return Promise.reject(new Error(msg))
    } else if (code === 601) {
      ElMessage({ message: msg, type: 'warning' })
      return Promise.reject(new Error(msg))
    } else if (code !== 200) {
      ElNotification.error({ title: msg })
      return Promise.reject('error')
    } else {
      return Promise.resolve(res.data)
    }
  },
  error => {
    console.log('err' + error)
    let { message } = error;
    if (message == "Network Error") {
      message = "后端接口连接异常";
    } else if (message.includes("timeout")) {
      message = "系统接口请求超时";
    } else if (message.includes("Request failed with status code")) {
      message = "系统接口" + message.substr(message.length - 3) + "异常";
    }
    ElMessage({ message: message, type: 'error', duration: 5 * 1000 })
    return Promise.reject(error)
  }
)

// 通用下载方法
export function download(url, params, filename, config) {
  downloadLoadingInstance = ElLoading.service({ text: "正在下载数据，请稍候", background: "rgba(0, 0, 0, 0.7)", })
  return digitalCreditRequest.post(url, params, {
    transformRequest: [(params) => { return tansParams(params) }],
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
    responseType: 'blob',
    ...config
  }).then(async (data) => {
    const isBlob = blobValidate(data);
    if (isBlob) {
      const blob = new Blob([data])
      saveAs(blob, filename)
    } else {
      const resText = await data.text();
      const rspObj = JSON.parse(resText);
      const errMsg = rspObj.msg || '下载文件出现错误，请联系管理员！';
      ElMessage.error(errMsg);
    }
    downloadLoadingInstance.close();
  }).catch((r) => {
    console.error(r)
    ElMessage.error('下载文件出现错误，请联系管理员！')
    downloadLoadingInstance.close();
  })
}

// 权限验证辅助方法
export function checkApiPermission(apiPath, method = 'GET') {
  const userStore = useUserStore()
  const permissions = userStore.permissions || []
  
  // 数字债权API权限映射
  const apiPermissionMap = {
    // 合同管理
    'POST:/api/credit/contracts': ['contract_create'],
    'PUT:/api/credit/contracts': ['contract_edit'],
    'DELETE:/api/credit/contracts': ['contract_delete'],
    'PUT:/api/credit/contracts/*/confirm': ['contract_confirm'],
    
    // 债权管理
    'POST:/api/credit/credits': ['credit_generate'],
    'PUT:/api/credit/credits/*/transfer': ['credit_transfer'],
    
    // 融资管理
    'POST:/api/credit/financing': ['financing_apply'],
    'PUT:/api/credit/financing/*/approve': ['financing_approve'],
    'POST:/api/credit/financing/*/risk-assess': ['risk_assess'],
    
    // 支付结算
    'POST:/api/payment/process': ['payment_process'],
    'PUT:/api/payment/escrow/*/distribute': ['fund_distribute'],
    
    // 区块链集成
    'POST:/api/blockchain/store': ['data_store'],
    'POST:/api/blockchain/contract/execute': ['blockchain_manage'],
    
    // 报表分析
    'POST:/api/reports/generate': ['report_generate'],
    'GET:/api/reports/*/export': ['report_export'],
    
    // 安全管理
    'GET:/api/security/audit-logs': ['security_manage'],
    'PUT:/api/security/policies': ['security_manage'],
    
    // 通知服务
    'POST:/api/notification/send': ['message_send'],
    'POST:/api/notification/templates': ['template_manage']
  }
  
  const key = `${method.toUpperCase()}:${apiPath}`
  const requiredPermissions = apiPermissionMap[key] || []
  
  if (requiredPermissions.length === 0) {
    return true // 无特殊权限要求
  }
  
  return requiredPermissions.some(permission => permissions.includes(permission))
}

// 数据范围过滤方法
export function applyDataScopeFilter(params, dataScope, userInfo) {
  if (!dataScope || dataScope === 'all') {
    return params
  }
  
  const filteredParams = { ...params }
  
  switch (dataScope) {
    case 'own_company':
      filteredParams.companyId = userInfo.companyId
      break
    case 'related_contracts':
      filteredParams.relatedUserId = userInfo.userId
      break
    case 'financing_related':
      filteredParams.financingRelated = true
      if (userInfo.roleKey === 'financial_institution') {
        filteredParams.institutionId = userInfo.companyId
      }
      break
    case 'platform_level':
      // 平台级数据，无需额外过滤
      break
  }
  
  return filteredParams
}

// 重新登录标识
let isRelogin = { show: false };

export default digitalCreditRequest