import request from './request'

// 报表统计API

export interface DashboardStats {
  unpaidReceivable: number
  pendingExpense: number
  todayIncome: number
  todayExpense: number
  pendingApprovalCount: number
  overdueReceivableCount: number
}

export interface TrendItem {
  date: string
  income: number
  expense: number
}

export interface DistributionItem {
  name: string
  count: number
  value: number | string
}

// 项目收支分析DTO
export interface ProjectFinance {
  projectId: number
  projectCode: string
  projectName: string
  customerName: string
  status: string
  receivableAmount: number
  receivedAmount: number
  unreceivedAmount: number
  receiveRate: number
  expenseAmount: number
  profit: number
  profitRate: number
}

// 获取仪表盘统计数据
export function getDashboardStats() {
  return request.get<DashboardStats>('/report/dashboard/stats')
}

// 获取收支趋势
export function getTrend(period: 'week' | 'month' | 'quarter' = 'week') {
  return request.get<TrendItem[]>('/report/trend', { params: { period } })
}

// 获取项目状态分布
export function getProjectStatusDistribution() {
  return request.get<DistributionItem[]>('/report/project/status-distribution')
}

// 获取支出类型分布
export function getExpenseTypeDistribution() {
  return request.get<DistributionItem[]>('/report/expense/type-distribution')
}

// 获取项目收支分析
export function getProjectFinance(params?: { status?: string; customerId?: number }) {
  return request.get<ProjectFinance[]>('/report/project/finance', { params })
}

// 导出项目收支分析Excel
export function exportProjectFinance(params?: { status?: string; customerId?: number }) {
  const baseUrl = import.meta.env.VITE_API_URL || ''
  const token = localStorage.getItem('token')
  const tenantId = localStorage.getItem('tenantId') || '1'
  
  // 构建查询参数
  const queryParams = new URLSearchParams()
  if (params?.status) queryParams.append('status', params.status)
  if (params?.customerId) queryParams.append('customerId', String(params.customerId))
  
  const queryString = queryParams.toString()
  const url = `${baseUrl}/report/project/finance/export${queryString ? '?' + queryString : ''}`
  
  // 使用fetch下载
  return fetch(url, {
    headers: {
      Authorization: `Bearer ${token}`,
      'X-Tenant-Id': tenantId
    }
  }).then(response => {
    if (!response.ok) throw new Error('导出失败')
    
    // 获取文件名
    const contentDisposition = response.headers.get('Content-Disposition')
    let filename = '项目收支分析报表.xlsx'
    if (contentDisposition) {
      const match = contentDisposition.match(/filename\*=utf-8''(.+)/i)
      if (match && match[1]) {
        filename = decodeURIComponent(match[1])
      }
    }
    
    return response.blob().then(blob => ({ blob, filename }))
  })
}