import { query } from '../../utils/db'

/**
 * 사업 목록 조회
 * GET /api/business/list
 * 
 * Query params:
 * - status: 상태 필터 (active, completed, suspended)
 * - businessName: 사업명 검색
 * - businessCode: 사업코드 검색
 * - clientName: 발주처 검색
 */
export default defineEventHandler(async (event) => {
  const params = getQuery(event)
  
  const status = params.status as string | null
  const businessName = params.businessName as string | null
  const businessCode = params.businessCode as string | null
  const clientName = params.clientName as string | null
  
  const conditions: string[] = []
  const values: any[] = []
  let paramIndex = 1
  
  if (status) {
    conditions.push(`b.business_status = $${paramIndex++}`)
    values.push(status)
  }
  
  if (businessName) {
    conditions.push(`b.business_name ILIKE $${paramIndex++}`)
    values.push(`%${businessName}%`)
  }
  
  if (businessCode) {
    conditions.push(`b.business_code ILIKE $${paramIndex++}`)
    values.push(`%${businessCode}%`)
  }
  
  if (clientName) {
    conditions.push(`b.client_name ILIKE $${paramIndex++}`)
    values.push(`%${clientName}%`)
  }
  
  const whereClause = conditions.length > 0 ? `WHERE ${conditions.join(' AND ')}` : ''
  
  const sql = `
    SELECT 
      b.*,
      e.employee_name as created_by_name,
      (SELECT COUNT(*) FROM wr_project_info WHERE business_id = b.business_id) as project_count
    FROM wr_business b
    LEFT JOIN wr_employee_info e ON b.created_by = e.employee_id
    ${whereClause}
    ORDER BY b.created_at DESC
  `
  
  const businesses = await query(sql, values)
  
  return {
    businesses: businesses.map((b: any) => ({
      businessId: b.business_id,
      businessName: b.business_name,
      businessCode: b.business_code,
      clientName: b.client_name,
      contractStartDate: b.contract_start_date,
      contractEndDate: b.contract_end_date,
      businessStatus: b.business_status,
      description: b.description,
      projectCount: Number(b.project_count),
      createdBy: b.created_by,
      createdByName: b.created_by_name,
      createdAt: b.created_at,
      updatedAt: b.updated_at
    }))
  }
})