import { query, insertReturning, execute } from '../../../utils/db'
import { getWeekInfo } from '../../../utils/week-calc'
import { getClientIp } from '../../../utils/ip'
import { getCurrentUserEmail } from '../../../utils/user'

interface ProjectItem {
  projectId: number
  workDescription?: string
  planDescription?: string
}

interface CreateReportBody {
  reportYear?: number
  reportWeek?: number
  projects: ProjectItem[]
  issueDescription?: string
  vacationDescription?: string
  remarkDescription?: string
}

/**
 * 주간보고 작성
 * POST /api/report/weekly/create
 */
export default defineEventHandler(async (event) => {
  const userId = getCookie(event, 'user_id')
  if (!userId) {
    throw createError({ statusCode: 401, message: '로그인이 필요합니다.' })
  }
  
  const body = await readBody<CreateReportBody>(event)
  const clientIp = getClientIp(event)
  const userEmail = await getCurrentUserEmail(event)
  
  if (!body.projects || body.projects.length === 0) {
    throw createError({ statusCode: 400, message: '최소 1개 이상의 프로젝트를 추가해주세요.' })
  }
  
  // 주차 정보 (기본값: 이번 주)
  const weekInfo = getWeekInfo()
  const year = body.reportYear || weekInfo.year
  const week = body.reportWeek || weekInfo.week
  
  // 중복 체크
  const existing = await query(`
    SELECT report_id FROM wr_weekly_report
    WHERE author_id = $1 AND report_year = $2 AND report_week = $3
  `, [parseInt(userId), year, week])
  
  if (existing.length > 0) {
    throw createError({ statusCode: 409, message: '이미 해당 주차 보고서가 존재합니다.' })
  }
  
  // 주차 날짜 계산
  const dates = getWeekInfo(new Date(year, 0, 4 + (week - 1) * 7))
  
  // 마스터 생성
  const report = await insertReturning(`
    INSERT INTO wr_weekly_report (
      author_id, report_year, report_week,
      week_start_date, week_end_date,
      issue_description, vacation_description, remark_description,
      report_status, created_ip, created_email, updated_ip, updated_email
    ) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, 'DRAFT', $9, $10, $9, $10)
    RETURNING *
  `, [
    parseInt(userId),
    year,
    week,
    dates.startDateStr,
    dates.endDateStr,
    body.issueDescription || null,
    body.vacationDescription || null,
    body.remarkDescription || null,
    clientIp,
    userEmail
  ])
  
  // 프로젝트별 실적 저장
  for (const proj of body.projects) {
    await execute(`
      INSERT INTO wr_weekly_report_project (
        report_id, project_id, work_description, plan_description,
        created_ip, created_email, updated_ip, updated_email
      ) VALUES ($1, $2, $3, $4, $5, $6, $5, $6)
    `, [
      report.report_id,
      proj.projectId,
      proj.workDescription || null,
      proj.planDescription || null,
      clientIp,
      userEmail
    ])
  }
  
  return {
    success: true,
    reportId: report.report_id
  }
})