name: CI and Deploy to Raspberry Pi

on:
  push:
    branches:
      - production
      - dev
      - preview

jobs:
  test_and_build:
    runs-on: ubuntu-latest
    steps:
      - name: Check Out Code
        uses: actions/checkout@v4

      - name: Set up Node
        uses: actions/setup-node@v3
        with:
          node-version: '22'

      - name: Install Dependencies
        run: npm install

      - name: Run Tests
        run: npm run test

      - name: Log in to GHCR
        run: |
          echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.repository_owner }} --password-stdin

      - name: Build and Push Multi-Arch Docker Image
        run: |
          IMAGE_NAME="ghcr.io/${{ github.repository_owner }}/my-nextjs-app:${{ github.ref_name }}"
          IMAGE_NAME=$(echo "$IMAGE_NAME" | tr '[:upper:]' '[:lower:]')
          docker buildx create --use
          docker buildx build \
            --platform linux/arm64,linux/amd64 \
            -t "$IMAGE_NAME" \
            --push \
            .

  deploy:
    runs-on: self-hosted
    needs: test_and_build
    steps:
      - name: Check Out Code
        uses: actions/checkout@v4

      - name: Set Environment Variables
        run: |
          if [[ "${{ github.ref_name }}" == "production" ]]; then
            echo "DEPLOY_ENV=production" >> $GITHUB_ENV
            echo "PORT=4000" >> $GITHUB_ENV
          elif [[ "${{ github.ref_name }}" == "dev" ]]; then
            echo "DEPLOY_ENV=dev" >> $GITHUB_ENV
            echo "PORT=4001" >> $GITHUB_ENV
          elif [[ "${{ github.ref_name }}" == "preview" ]]; then
            echo "DEPLOY_ENV=preview" >> $GITHUB_ENV
            echo "PORT=4002" >> $GITHUB_ENV
          fi

      - name: Log in to GHCR
        run: |
          echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.repository_owner }} --password-stdin

      - name: Pull Docker Image
        run: |
          IMAGE_NAME="ghcr.io/${{ github.repository_owner }}/my-nextjs-app:${{ github.ref_name }}"
          IMAGE_NAME=$(echo "$IMAGE_NAME" | tr '[:upper:]' '[:lower:]')
          docker pull "$IMAGE_NAME"

      - name: Deploy on Raspberry Pi (Zero-Downtime)
        run: |
          IMAGE_NAME="ghcr.io/${{ github.repository_owner }}/my-nextjs-app:${{ github.ref_name }}"
          IMAGE_NAME=$(echo "$IMAGE_NAME" | tr '[:upper:]' '[:lower:]')
          CONTAINER_NAME="nextjs-$DEPLOY_ENV"
          NEW_CONTAINER_NAME="$CONTAINER_NAME-new"

          # Remove existing temporary container, if any
          if [ "$(docker ps -aq -f name=$NEW_CONTAINER_NAME)" ]; then
            docker rm -f "$NEW_CONTAINER_NAME" || true
          fi

          # Start new container on a temporary internal port
          docker run -d --name "$NEW_CONTAINER_NAME" -p 40000:3000 \
            -e GHOST_API_KEY="${{ secrets.GHOST_API_KEY }}" \
            -e NEXT_PUBLIC_BASE_URL="${{ secrets.NEXT_PUBLIC_BASE_URL }}" \
            -e MY_EMAIL="${{ secrets.MY_EMAIL }}" \
            -e MY_PASSWORD="${{ secrets.MY_PASSWORD }}" \
            -e GHOST_API_URL="${{ secrets.GHOST_API_URL }}" \
            "$IMAGE_NAME"

          # Wait for the new container to start
          sleep 10

          if [ "$(docker inspect --format='{{.State.Running}}' $NEW_CONTAINER_NAME)" = "true" ]; then
            # Stop/remove the old container
            if [ "$(docker ps -aq -f name=$CONTAINER_NAME)" ]; then
              docker stop "$CONTAINER_NAME" || true
              docker rm   "$CONTAINER_NAME" || true
            fi

            # Replace the new container with final name/port
            docker stop  "$NEW_CONTAINER_NAME" || true
            docker rm    "$NEW_CONTAINER_NAME" || true
            docker run -d --name "$CONTAINER_NAME" -p $PORT:3000 \
              -e GHOST_API_KEY="${{ secrets.GHOST_API_KEY }}" \
              -e NEXT_PUBLIC_BASE_URL="${{ secrets.NEXT_PUBLIC_BASE_URL }}" \
              -e MY_EMAIL="${{ secrets.MY_EMAIL }}" \
              -e MY_PASSWORD="${{ secrets.MY_PASSWORD }}" \
              -e GHOST_API_URL="${{ secrets.GHOST_API_URL }}" \
              "$IMAGE_NAME"
          else
            echo "New container failed to start."
            docker logs "$NEW_CONTAINER_NAME"
            exit 1
          fi