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

/**
 * 내 주간 커밋 조회 (주간보고 작성용)
 * GET /api/commits/my-weekly
 * 
 * Query params:
 * - projectId: 프로젝트 ID (필수)
 * - startDate: 주 시작일 (YYYY-MM-DD)
 * - endDate: 주 종료일 (YYYY-MM-DD)
 */
export default defineEventHandler(async (event) => {
  const employeeId = await requireAuth(event)
  const queryParams = getQuery(event)
  
  const projectId = queryParams.projectId ? parseInt(queryParams.projectId as string) : null
  const startDate = queryParams.startDate as string
  const endDate = queryParams.endDate as string
  
  if (!projectId) {
    throw createError({ statusCode: 400, message: '프로젝트 ID가 필요합니다.' })
  }
  
  // 조건 빌드
  const conditions = [
    'r.project_id = $1',
    'c.employee_id = $2'
  ]
  const values: any[] = [projectId, employeeId]
  let paramIndex = 3
  
  if (startDate) {
    conditions.push(`c.commit_date >= $${paramIndex++}`)
    values.push(startDate)
  }
  
  if (endDate) {
    conditions.push(`c.commit_date <= $${paramIndex++}::date + INTERVAL '1 day'`)
    values.push(endDate)
  }
  
  const whereClause = conditions.join(' AND ')
  
  // 내 커밋 목록
  const commits = await query(`
    SELECT 
      c.commit_id, c.commit_hash, c.commit_message, c.commit_date,
      c.files_changed, c.insertions, c.deletions,
      r.repo_id, r.repo_name,
      s.server_type
    FROM wr_commit_log c
    JOIN wr_repository r ON c.repo_id = r.repo_id
    JOIN wr_vcs_server s ON r.server_id = s.server_id
    WHERE ${whereClause}
    ORDER BY c.commit_date DESC
    LIMIT 100
  `, values)
  
  // 통계
  const statsResult = await query(`
    SELECT 
      COUNT(*) as commit_count,
      COALESCE(SUM(c.insertions), 0) as total_insertions,
      COALESCE(SUM(c.deletions), 0) as total_deletions
    FROM wr_commit_log c
    JOIN wr_repository r ON c.repo_id = r.repo_id
    WHERE ${whereClause}
  `, values)
  
  return {
    commits: commits.map(c => ({
      commitId: c.commit_id,
      commitHash: c.commit_hash?.substring(0, 8),
      commitMessage: c.commit_message,
      commitDate: c.commit_date,
      filesChanged: c.files_changed,
      insertions: c.insertions,
      deletions: c.deletions,
      repoId: c.repo_id,
      repoName: c.repo_name,
      serverType: c.server_type
    })),
    stats: {
      commitCount: parseInt(statsResult[0]?.commit_count || '0'),
      totalInsertions: parseInt(statsResult[0]?.total_insertions || '0'),
      totalDeletions: parseInt(statsResult[0]?.total_deletions || '0')
    }
  }
})