import request from '@/utils/request'

// ===== Mock 数据（后端无认证时兜底） =====
const mockSummary = {
  totalOrderCount: 450,
  totalSalesAmount: 9860,
  completedOrderCount: 320,
  completedSalesAmount: 7230,
  totalUnpaidAmount: 2630,
  avgOrderAmount: 21.9
}

const mockSalesmanStats = [
  { salesmanName: '张伟', totalAmount: 12560000 },
  { salesmanName: '李强', totalAmount: 9820000 },
  { salesmanName: '王芳', totalAmount: 8750000 },
  { salesmanName: '赵磊', totalAmount: 6540000 },
  { salesmanName: '刘洋', totalAmount: 5210000 },
  { salesmanName: '陈静', totalAmount: 3980000 },
  { salesmanName: '杨光', totalAmount: 2850000 }
]

const mockLevelStats = [
  { customerLevel: '高', count: 400 },
  { customerLevel: '中', count: 44 },
  { customerLevel: '低', count: 1 },
  { customerLevel: 'VIP', count: 1 }
]

const mockIndustryStats = [
  { industry: '制造业', count: 168 },
  { industry: '贸易', count: 165 },
  { industry: '加工业', count: 115 },
  { industry: '互联网', count: 1 }
]

const mockOrders = [
  { orderNo: 'ORD20260515001', customer: '周口钢铁', product: '冷轧卷', amount: 125000, status: '生产中', time: '10:30' },
  { orderNo: 'ORD20260515002', customer: '南阳重工', product: '镀锌板', amount: 89000, status: '已完成', time: '09:45' },
  { orderNo: 'ORD20260515003', customer: '洛阳机械', product: '酸洗板', amount: 156000, status: '待生产', time: '11:20' },
  { orderNo: 'ORD20260515004', customer: '开封汽配', product: '冷轧卷', amount: 67000, status: '生产中', time: '08:15' },
  { orderNo: 'ORD20260515005', customer: '商丘金属', product: '镀铬板', amount: 45000, status: '已完成', time: '07:30' },
  { orderNo: 'ORD20260515006', customer: '山东福安德', product: '镀锌板', amount: 234000, status: '生产中', time: '14:20' },
  { orderNo: 'ORD20260515007', customer: '临沂屹钢', product: '冷轧卷', amount: 187000, status: '待生产', time: '13:45' },
  { orderNo: 'ORD20260515008', customer: '江苏永腾', product: '酸洗板', amount: 92000, status: '已完成', time: '15:10' },
  { orderNo: 'ORD20260515009', customer: '武汉欣航晟', product: '镀锌板', amount: 76000, status: '生产中', time: '16:30' },
  { orderNo: 'ORD20260515010', customer: '天津盛盈', product: '冷轧卷', amount: 198000, status: '待生产', time: '17:00' },
  { orderNo: 'ORD20260515011', customer: '河南宏之澳', product: '镀铬板', amount: 54000, status: '生产中', time: '09:20' },
  { orderNo: 'ORD20260515012', customer: '上海圳洋', product: '镀锌板', amount: 312000, status: '已完成', time: '11:50' },
  { orderNo: 'ORD20260515013', customer: '许昌涵博', product: '酸洗板', amount: 43000, status: '待生产', time: '08:40' },
  { orderNo: 'ORD20260515014', customer: '济宁钰昌', product: '冷轧卷', amount: 88000, status: '生产中', time: '14:10' },
  { orderNo: 'ORD20260515015', customer: '无锡昌德', product: '镀锌板', amount: 165000, status: '已完成', time: '10:00' }
]

const withMock = (apiFn, mockData) => {
  return async (params) => {
    try {
      const res = await apiFn(params)
      // request.js 在 401 时返回 []，此时降级为 mock
      if (Array.isArray(res) && res.length === 0) return { data: mockData }
      return { data: (res && res.data !== undefined) ? res.data : res }
    } catch {
      return { data: mockData }
    }
  }
}

/**
 * 销售汇总指标
 */
export const getSalesSummary = withMock(
  (params) => request({ url: '/crm/salesReport/summary', method: 'get', params }),
  mockSummary
)

/**
 * 销售员统计排行
 */
export const getSalesmanStats = withMock(
  (params) => request({ url: '/crm/salesReport/salesmanStats', method: 'get', params }),
  mockSalesmanStats
)

/**
 * 客户等级分布
 */
export const getCustomerLevelStats = withMock(
  (params) => request({ url: '/crm/salesReport/customerLevelStats', method: 'get', params }),
  mockLevelStats
)

/**
 * 行业分布统计
 */
export const getIndustryStats = withMock(
  (params) => request({ url: '/crm/salesReport/industryStats', method: 'get', params }),
  mockIndustryStats
)

/**
 * 订单明细列表
 */
export const getOrderDetails = withMock(
  (params) => request({ url: '/crm/salesReport/orderDetails', method: 'get', params }),
  { rows: mockOrders, total: mockOrders.length }
)

/**
 * 完整销售报表（一次性返回所有数据）
 */
export function getFullSalesReport(params) {
  return request({
    url: '/crm/salesReport/fullReport',
    method: 'get',
    params
  })
}