# Ubuntu 서버 nginx 설정 자동 배포 워크플로우 (Gitea Actions)
#
# 성공 조건:
# - Gitea Actions 활성화
# - admin 사용자 sudo NOPASSWD 설정 완료
# - nginx 서비스 실행 중
#
# 실패 조건:
# - sudo 권한 없음
# - nginx 설정 문법 오류
# - 시스템 서비스 오류
#
# 주요 작업:
# 1. 소스 코드 체크아웃
# 2. nginx 설정 백업
# 3. 새 설정 적용 (/etc/nginx/sites-available/default)
# 4. nginx 설정 검증 (nginx -t)
# 5. nginx 서비스 reload
# 6. 배포 결과 확인

name: Deploy Nginx Config to Ubuntu Server

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  deploy:
    runs-on: self-hosted
    
    steps:
      - name: Checkout source code
        uses: actions/checkout@v4
        
      - name: Backup current nginx config
        run: |
          echo "📋 Creating backup of current nginx configuration..."
          sudo cp /etc/nginx/sites-available/default /etc/nginx/sites-available/default.backup.$(date +%Y%m%d_%H%M%S)
          echo "✅ Backup created successfully"
          
      - name: Validate new nginx configuration
        run: |
          echo "🔍 Validating new nginx configuration syntax..."
          # Backup current config and test with new one
          sudo cp /etc/nginx/sites-available/default /etc/nginx/sites-available/default.temp.backup
          sudo cp server-nginx-default /etc/nginx/sites-available/default
          sudo nginx -t || {
            echo "❌ New nginx configuration has syntax errors!"
            # Restore backup
            sudo cp /etc/nginx/sites-available/default.temp.backup /etc/nginx/sites-available/default
            exit 1
          }
          # Restore backup for now (will apply later)
          sudo cp /etc/nginx/sites-available/default.temp.backup /etc/nginx/sites-available/default
          echo "✅ New configuration syntax is valid"
          
      - name: Apply new nginx configuration
        run: |
          echo "📋 Applying new nginx configuration..."
          sudo cp server-nginx-default /etc/nginx/sites-available/default
          echo "✅ Configuration file updated"
          
      - name: Test nginx configuration
        run: |
          echo "🔍 Testing nginx configuration with current setup..."
          sudo nginx -t
          echo "✅ Configuration test passed"
          
      - name: Reload nginx service
        run: |
          echo "🔄 Reloading nginx service..."
          sudo systemctl reload nginx
          echo "✅ Nginx service reloaded successfully"
          
      - name: Verify deployment
        run: |
          echo "🚀 Verifying deployment status..."
          # Check nginx service status
          sudo systemctl is-active nginx || {
            echo "❌ Nginx service is not running!"
            # Rollback on failure
            echo "🔄 Rolling back to previous configuration..."
            BACKUP_FILE=$(ls -t /etc/nginx/sites-available/default.backup.* 2>/dev/null | head -1)
            if [ -n "$BACKUP_FILE" ]; then
              sudo cp "$BACKUP_FILE" /etc/nginx/sites-available/default
              sudo systemctl reload nginx
              echo "✅ Rollback completed"
            fi
            exit 1
          }
          
          # Test HTTP response
          curl -f -s -I http://localhost:80 > /dev/null || {
            echo "⚠️  Warning: HTTP response test failed, but nginx is running"
          }
          
          echo "✅ Deployment completed successfully!"
          echo "📊 Deployment Summary:"
          echo "  - Configuration: Applied"
          echo "  - Service: Running"
          echo "  - Status: Success"
          
      - name: Cleanup old backups
        run: |
          echo "🧹 Cleaning up old backup files (keeping last 5)..."
          cd /etc/nginx/sites-available/
          sudo ls -t default.backup.* 2>/dev/null | tail -n +6 | sudo xargs rm -f
          echo "✅ Cleanup completed"