import { getClientIp } from '../../utils/ip'
import { createSession, setSessionCookie } from '../../utils/session'

interface SelectUserBody {
  employeeId: number
}

/**
 * 기존 사용자 선택 로그인
 * POST /api/auth/select-user
 */
export default defineEventHandler(async (event) => {
  const body = await readBody<SelectUserBody>(event)
  const clientIp = getClientIp(event)
  const userAgent = getHeader(event, 'user-agent') || null
  
  if (!body.employeeId) {
    throw createError({ statusCode: 400, message: '사용자를 선택해주세요.' })
  }
  
  // 사원 조회
  const employee = await queryOne<any>(`
    SELECT * FROM wr_employee_info 
    WHERE employee_id = $1 AND is_active = true
  `, [body.employeeId])
  
  if (!employee) {
    throw createError({ statusCode: 404, message: '사용자를 찾을 수 없습니다.' })
  }
  
  // 로그인 이력 추가
  const loginHistory = await insertReturning(`
    INSERT INTO wr_login_history (employee_id, login_ip, login_email) 
    VALUES ($1, $2, $3)
    RETURNING history_id
  `, [employee.employee_id, clientIp, employee.employee_email])
  
  // DB 기반 세션 생성
  const sessionId = await createSession(
    employee.employee_id,
    loginHistory.history_id,
    clientIp,
    userAgent
  )
  
  // 세션 쿠키 설정
  setSessionCookie(event, sessionId)
  
  return {
    success: true,
    user: {
      employeeId: employee.employee_id,
      employeeName: employee.employee_name,
      employeeEmail: employee.employee_email,
      employeePosition: employee.employee_position
    }
  }
})