name: Docker Image CI

on:
  push:
    tags:
      - '*'

jobs:
  docker-releases:
    runs-on: ubuntu-latest

    steps:
    - name: Get release version
      run: echo "RELEASE_VERSION=${GITHUB_REF#refs/tags/}" >> $GITHUB_ENV

    - name: Downcase username
      run: echo "lower_actor=${GITHUB_ACTOR,,}" >> $GITHUB_ENV

    - name: Checkout
      uses: actions/checkout@v4

    - name: Set up QEMU
      uses: docker/setup-qemu-action@v3

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v3

    - name: Login to GitHub Container Registry
      uses: docker/login-action@v3
      with:
        registry: ghcr.io
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}

    - name: Build and push Docker images
      uses: docker/build-push-action@v6.9.0
      with:
        context: ./
        push: true
        tags: |
          ghcr.io/${{ env.lower_actor }}/aperisolve:${{ env.RELEASE_VERSION }}
          ghcr.io/${{ env.lower_actor }}/aperisolve:latest

  deploy:
    runs-on: ubuntu-latest
    needs: docker-releases
    environment: prod

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check if tag is from prod branch
        id: check
        run: |
          TAG_REF="${GITHUB_REF#refs/tags/}"
          echo "Tag: $TAG_REF"
          echo "Commit SHA: $GITHUB_SHA"

          # Get branches containing this commit
          BRANCHES=$(git branch -r --contains HEAD)
          echo "Branches containing this commit: $BRANCHES"

          # Check if commit is on prod branch
          if echo "$BRANCHES" | grep -q "origin/prod"; then
            # Additional check: ensure this commit is at the HEAD of prod
            # This prevents deployment if the same commit exists on multiple branches
            PROD_HEAD=$(git rev-parse origin/prod)
            TAG_COMMIT=$(git rev-parse HEAD)
            
            echo "Prod HEAD: $PROD_HEAD"
            echo "Tag commit: $TAG_COMMIT"
            
            if [ "$PROD_HEAD" = "$TAG_COMMIT" ]; then
              echo "is_prod=true" >> $GITHUB_OUTPUT
              echo "✅ Tag is at prod branch HEAD - will deploy"
            else
              echo "is_prod=false" >> $GITHUB_OUTPUT
              echo "⚠️ Commit is on prod but not at HEAD - skipping deployment"
            fi
          else
            echo "is_prod=false" >> $GITHUB_OUTPUT
            echo "❌ Tag is not from prod branch - skipping deployment"
          fi

      # wait for 30 seconds 
      - name: Wait for image propagation
        if: steps.check.outputs.is_prod == 'true'
        run: |
          echo "Waiting 30 seconds for image to propagate in registry..."
          sleep 30

      - name: Deploy to production server
        if: steps.check.outputs.is_prod == 'true'
        uses: appleboy/ssh-action@v1.0.3
        with:
          host: ${{ secrets.PROD_SSH_HOST }}
          username: ${{ secrets.PROD_SSH_USER }}
          key: ${{ secrets.PROD_SSH_KEY }}
          script: |
            set -e
            cd /root/AperiSolve

            # update code
            git pull

            # create .env
            cat <<EOF > .env
            MAX_CONTENT_LENGTH=${{ vars.MAX_CONTENT_LENGTH }}
            MAX_PENDING_TIME=${{ vars.MAX_PENDING_TIME }}
            MAX_STORE_TIME=${{ vars.MAX_STORE_TIME }}
            CLEAR_AT_RESTART=${{ vars.CLEAR_AT_RESTART }}
            SKIP_IHDR_FILL=${{ vars.SKIP_IHDR_FILL }}

            FLASK_DEBUG=${{ vars.FLASK_DEBUG }}
            FLASK_ENV=${{ vars.FLASK_ENV }}

            RQ_DASHBOARD_REDIS_URL=${{ secrets.REDIS_URL }}

            POSTGRES_USER=${{ secrets.POSTGRES_USER }}
            POSTGRES_PASSWORD=${{ secrets.POSTGRES_PASSWORD }}
            POSTGRES_DB=${{ secrets.POSTGRES_DB }}
            DB_URI=${{ secrets.DATABASE_URL }}

            SENTRY_DSN=${{ secrets.SENTRY_DSN }}
            SENTRY_TRACES_SAMPLE_RATE=${{ secrets.SENTRY_TRACES_SAMPLE_RATE }}
            SENTRY_PROFILES_SAMPLE_RATE=${{ secrets.SENTRY_PROFILES_SAMPLE_RATE }}
            SENTRY_RELEASE=${{ secrets.SENTRY_RELEASE }}
            SENTRY_ENVIRONMENT=${{ secrets.SENTRY_ENVIRONMENT }}
            EOF

            # Pull images and deploy
            docker compose pull
            docker compose down
            docker compose up -d
            docker image prune -f