import { insertReturning, queryOne } from '../../../utils/db'
import { getWeekInfo } from '../../../utils/week-calc'

interface CreateReportBody {
  projectId: number
  reportYear?: number
  reportWeek?: number
  workDescription?: string
  planDescription?: string
  issueDescription?: string
  remarkDescription?: string
  workHours?: number
}

/**
 * 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)
  
  if (!body.projectId) {
    throw createError({ statusCode: 400, message: '프로젝트를 선택해주세요.' })
  }
  
  // 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 queryOne(`
    SELECT report_id FROM wr_weekly_report_detail
    WHERE project_id = $1 AND author_id = $2 AND report_year = $3 AND report_week = $4
  `, [body.projectId, parseInt(userId), year, week])
  
  if (existing) {
    throw createError({ statusCode: 409, message: '이미 해당 주차 보고서가 존재합니다.' })
  }
  
  // 주차 날짜 계산
  const dates = getWeekInfo(new Date(year, 0, 4 + (week - 1) * 7))
  
  const report = await insertReturning(`
    INSERT INTO wr_weekly_report_detail (
      project_id, author_id, report_year, report_week,
      week_start_date, week_end_date,
      work_description, plan_description, issue_description, remark_description,
      work_hours, report_status
    ) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, 'DRAFT')
    RETURNING *
  `, [
    body.projectId,
    parseInt(userId),
    year,
    week,
    dates.startDateStr,
    dates.endDateStr,
    body.workDescription || null,
    body.planDescription || null,
    body.issueDescription || null,
    body.remarkDescription || null,
    body.workHours || null
  ])
  
  return {
    success: true,
    reportId: report.report_id
  }
})