# Gitea Actions Workflow for Next.js Blog Application
# This workflow builds a Docker image and deploys it to production
#
# Workflow triggers:
#   - Push to master branch (automatic deployment)
#   - Manual trigger via workflow_dispatch
#
# Required Secrets (configure in Gitea repository settings):
#   - PRODUCTION_HOST: IP address or hostname of production server
#   - PRODUCTION_USER: SSH username (e.g., 'deployer')
#   - SSH_PRIVATE_KEY: Private SSH key for authentication
#   - REGISTRY_USERNAME: Docker registry username (optional, if registry requires auth)
#   - REGISTRY_PASSWORD: Docker registry password (optional, if registry requires auth)
#
# Environment Variables (configured below):
#   - REGISTRY: Docker registry URL
#   - IMAGE_NAME: Docker image name

name: Build and Deploy Next.js Blog to Production

on:
  push:
    branches:
      - master # Trigger on push to master branch
  workflow_dispatch: # Allow manual trigger from Gitea UI

env:
  # Docker registry configuration
  # Update this to match your private registry URL
  REGISTRY: repository.workspace:5000
  IMAGE_NAME: mypage

jobs:
  # ============================================
  # Job 1: Code Quality Checks (Linting)
  # ============================================
  lint:
    name: 🔍 Code Quality Checks
    runs-on: node-latest

    steps:
      - name: 🔎 Checkout code
        uses: actions/checkout@v4

      - name: 📥 Install dependencies
        run: npm ci

      - name: 🔍 Run ESLint
        run: npm run lint

      - name: 💅 Check code formatting (Prettier)
        run: npm run format:check

      - name: 🔤 TypeScript type checking
        run: npx tsc --noEmit

      - name: ✅ All quality checks passed
        run: |
          echo "✅ All code quality checks passed successfully!"
          echo "  - ESLint: No linting errors"
          echo "  - Prettier: Code is properly formatted"
          echo "  - TypeScript: No type errors"

  # ============================================
  # Job 2: Build and Push Docker Image
  # ============================================
  build-and-push:
    name: 🏗️ Build and Push Docker Image
    runs-on: ubuntu-latest
    needs: [lint] # Wait for lint job to complete successfully

    steps:
      - name: 🔎 Checkout code
        uses: actions/checkout@v4

      - name: 🔐 Log in to Docker Registry (if credentials provided)
        run: |
          if [ -n "${{ secrets.REGISTRY_USERNAME }}" ] && [ -n "${{ secrets.REGISTRY_PASSWORD }}" ]; then
            echo "Logging into ${{ env.REGISTRY }} with credentials..."
            echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login ${{ env.REGISTRY }} -u "${{ secrets.REGISTRY_USERNAME }}" --password-stdin
            echo "✅ Login successful"
          else
            echo "⚠️ No registry credentials provided - using insecure/public registry"
          fi

      - name: 🏗️ Build Docker image
        timeout-minutes: 30
        env:
          DOCKER_BUILDKIT: 1 # Enable BuildKit for faster builds and better caching
        run: |
          echo "Building Next.js Docker image with BuildKit..."
          echo "Build context size:"
          du -sh . 2>/dev/null || echo "Cannot measure context size"

          # Build the Docker image
          # - Uses Dockerfile.nextjs from project root
          # - Tags image with both 'latest' and commit SHA
          # - Enables inline cache for faster subsequent builds
          # -t ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }} ❗ do this if deploying on PR creation
          docker build \
            --progress=plain \
            --build-arg BUILDKIT_INLINE_CACHE=1 \
            -t ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest \
            -f Dockerfile.nextjs \
            .

          echo "✅ Build successful"
          echo "Image size:"
          docker images ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest

      - name: 🚀 Push Docker image to registry
        run: |
          echo "Pushing image to registry..."

          # Push both tags (latest and commit SHA)
          docker push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
          # docker push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}

          echo "✅ Image pushed successfully"
          echo "  - ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest"
          # echo "  - ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}"

  # ============================================
  # Job 2: Deploy to Production Server
  # ============================================
  deploy-production:
    name: 🚀 Deploy to Production
    runs-on: ubuntu-latest
    needs: [build-and-push] # Wait for build job to complete
    environment:
      name: production
      url: http://192.168.1.54:3030 # Update with your actual production URL

    steps:
      - name: 🔎 Checkout code (for docker-compose file)
        uses: actions/checkout@v4

      - name: 🔐 Validate Registry Access on Production Server
        uses: appleboy/ssh-action@v1.0.3
        env:
          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
          REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
          REGISTRY_URL: ${{ env.REGISTRY }}
        with:
          host: ${{ vars.PRODUCTION_HOST }}
          username: ${{ vars.PRODUCTION_USER }}
          key: ${{ secrets.SSH_PRIVATE_KEY }}
          port: 22
          envs: REGISTRY_PASSWORD,REGISTRY_USERNAME,REGISTRY_URL
          script: |
            echo "=== Validating Docker Registry access ==="
            if [ -n "$REGISTRY_USERNAME" ] && [ -n "$REGISTRY_PASSWORD" ]; then
              echo "Logging into $REGISTRY_URL with credentials..."
              echo "$REGISTRY_PASSWORD" | docker login "$REGISTRY_URL" -u "$REGISTRY_USERNAME" --password-stdin
              echo "✅ Registry authentication successful"
            else
              echo "⚠️ No registry credentials - using insecure/public registry"
              echo "Testing registry connectivity..."
              curl -f "http://$REGISTRY_URL/v2/" || { echo "❌ Registry not accessible"; exit 1; }
              echo "✅ Registry is accessible"
            fi

      - name: 📁 Ensure application directory structure
        uses: appleboy/ssh-action@v1.0.3
        with:
          host: ${{ vars.PRODUCTION_HOST }}
          username: ${{ vars.PRODUCTION_USER }}
          key: ${{ secrets.SSH_PRIVATE_KEY }}
          port: 22
          script: |
            echo "=== Ensuring application directory structure ==="

            # Verify base directory exists and is writable
            # Update /opt/mypage to match your deployment directory
            if [ ! -d /opt/mypage ]; then
              echo "❌ /opt/mypage does not exist!"
              echo "Please run manually on production server:"
              echo "  sudo mkdir -p /opt/mypage"
              echo "  sudo chown -R deployer:docker /opt/mypage"
              echo "  sudo chmod -R 775 /opt/mypage"
              exit 1
            fi

            if [ ! -w /opt/mypage ]; then
              echo "❌ /opt/mypage is not writable by $USER user"
              echo "Please run manually on production server:"
              echo "  sudo chown -R deployer:docker /opt/mypage"
              echo "  sudo chmod -R 775 /opt/mypage"
              exit 1
            fi

            # Create data directories for logs
            mkdir -p /opt/mypage/data/logs || { echo "❌ Failed to create logs directory"; exit 1; }

            echo "✅ Directory structure ready"
            ls -la /opt/mypage

      - name: 📦 Copy docker-compose.prod.yml to server
        uses: appleboy/scp-action@v0.1.7
        with:
          host: ${{ vars.PRODUCTION_HOST }}
          username: ${{ vars.PRODUCTION_USER }}
          key: ${{ secrets.SSH_PRIVATE_KEY }}
          port: 22
          source: "docker-compose.prod.yml"
          target: "/opt/mypage/"
          overwrite: true

      - name: 🐳 Deploy application via Docker Compose
        uses: appleboy/ssh-action@v1.0.3
        env:
          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD || '' }}
          REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME || '' }}
          REGISTRY_URL: ${{ env.REGISTRY }}
          IMAGE_FULL: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
        with:
          host: ${{ vars.PRODUCTION_HOST }}
          username: ${{ vars.PRODUCTION_USER }}
          key: ${{ secrets.SSH_PRIVATE_KEY }}
          port: 22
          envs: REGISTRY_PASSWORD,REGISTRY_USERNAME,REGISTRY_URL,IMAGE_FULL
          script_stop: true # Stop execution on any error
          script: |
            echo "=== Starting deployment to production server ==="
            cd /opt/mypage

            # Log in to Docker registry (if credentials are configured)
            if [ -n "$REGISTRY_USERNAME" ] && [ -n "$REGISTRY_PASSWORD" ]; then
              echo "=== Logging in to Docker registry ==="
              echo "$REGISTRY_PASSWORD" | docker login "$REGISTRY_URL" -u "$REGISTRY_USERNAME" --password-stdin
              echo "✅ Registry login successful"
            else
              echo "⚠️ No registry credentials - using insecure/public registry (no login required)"
            fi

            # Pull latest image from registry
            echo "=== Pulling latest Docker image ==="
            docker pull "$IMAGE_FULL"

            if [ $? -ne 0 ]; then
              echo "❌ Failed to pull image, aborting deployment"
              exit 1
            fi

            # Deploy new container
            # - Stops old container
            # - Removes old container
            # - Creates and starts new container with fresh image
            echo "=== Deploying new container ==="
            docker compose -f docker-compose.prod.yml up -d --force-recreate

            if [ $? -ne 0 ]; then
              echo "❌ Failed to deploy new container"
              echo "Check logs above for errors"
              exit 1
            fi

            # Check container status
            echo "=== Container Status ==="
            docker compose -f docker-compose.prod.yml ps

            # Show recent logs for debugging
            echo "=== Recent application logs ==="
            docker compose -f docker-compose.prod.yml logs --tail=50

            # Clean up old/unused images to save disk space
            echo "=== Cleaning up old Docker images ==="
            docker image prune -f

            echo "✅ Deployment completed successfully ==="

      - name: ❤️ Health check
        uses: appleboy/ssh-action@v1.0.3
        with:
          host: ${{ vars.PRODUCTION_HOST }}
          username: ${{ vars.PRODUCTION_USER }}
          key: ${{ secrets.SSH_PRIVATE_KEY }}
          port: 22
          script: |
            echo "=== Performing health check ==="
            cd /opt/mypage
            max_attempts=15
            attempt=1

            # Wait for container to be healthy (respect start_period from health check)
            echo "Waiting for application to start (40s start period)..."
            sleep 40

            # Retry health check up to 15 times
            while [ $attempt -le $max_attempts ]; do
              # Check if application responds at port 3030
              if curl -f http://localhost:3030/ > /dev/null 2>&1; then
                echo "✅ Health check passed!"
                echo "Application is healthy and responding to requests"
                exit 0
              fi
              echo "Attempt $attempt/$max_attempts: Health check failed, retrying in 5s..."
              sleep 5
              attempt=$((attempt + 1))
            done

            # Health check failed - gather diagnostic information
            echo "❌ Health check failed after $max_attempts attempts"
            echo ""
            echo "=== Container Status ==="
            docker compose -f docker-compose.prod.yml ps
            echo ""
            echo "=== Container Health ==="
            docker inspect mypage-prod --format='{{.State.Health.Status}}' 2>/dev/null || echo "No health status"
            echo ""
            echo "=== Recent Application Logs ==="
            docker compose -f docker-compose.prod.yml logs --tail=100

            exit 1

      - name: 📊 Deployment summary
        if: always() # Run even if previous steps fail
        run: |
          echo "### 🚀 Deployment Summary" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "- **Environment**: Production" >> $GITHUB_STEP_SUMMARY
          echo "- **Image**: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest" >> $GITHUB_STEP_SUMMARY
          echo "- **Commit**: \`${{ github.sha }}\`" >> $GITHUB_STEP_SUMMARY
          echo "- **Workflow Run**: #${{ github.run_number }}" >> $GITHUB_STEP_SUMMARY
          echo "- **Triggered By**: ${{ github.actor }}" >> $GITHUB_STEP_SUMMARY
          echo "- **Status**: ${{ job.status }}" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "**Next Steps:**" >> $GITHUB_STEP_SUMMARY
          echo "1. Verify application is accessible at production URL" >> $GITHUB_STEP_SUMMARY
          echo "2. Check application logs for any errors" >> $GITHUB_STEP_SUMMARY
          echo "3. Monitor resource usage and performance" >> $GITHUB_STEP_SUMMARY