name: Deploy Next.js to Raspberry Pi

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

jobs:
  deploy:
    runs-on: self-hosted # Der Runner sollte auf dem Raspberry Pi laufen

    steps:
      - name: Checkout Code
        uses: actions/checkout@v3

      - 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: Build Docker Image
        run: |
          IMAGE_NAME="my-nextjs-app:$DEPLOY_ENV"
          docker build -t $IMAGE_NAME .

      - name: Deploy on Raspberry Pi (Zero-Downtime)
        run: |
          CONTAINER_NAME="nextjs-$DEPLOY_ENV"
          IMAGE_NAME="my-nextjs-app:$DEPLOY_ENV"
          NEW_CONTAINER_NAME="$CONTAINER_NAME-new"

          # Prüft, ob der alte Container existiert und entfernt ihn
          if [ $(docker ps -aq -f name=$NEW_CONTAINER_NAME) ]; then
            echo "Removing existing new container ($NEW_CONTAINER_NAME)..."
            docker rm -f "$NEW_CONTAINER_NAME" || true
          fi

          # Führt den neuen Container auf einem temporären internen Port aus
          docker run -d --name "$NEW_CONTAINER_NAME" -p 40000:3000 $IMAGE_NAME

          # Warten, um sicherzustellen, dass der neue Container läuft
          sleep 10

          # Prüfen, ob der neue Container erfolgreich läuft
          if [ $(docker inspect --format='{{.State.Running}}' $NEW_CONTAINER_NAME) == "true" ]; then
            # Stoppt und entfernt den alten Container, falls vorhanden
            if [ $(docker ps -aq -f name=$CONTAINER_NAME) ]; then
              docker stop "$CONTAINER_NAME" || true
              docker rm "$CONTAINER_NAME" || true
            fi

            # Benennt den neuen Container zum alten Namen um und weist den gewünschten Port zu
            docker rename "$NEW_CONTAINER_NAME" "$CONTAINER_NAME"
            docker run -d --name "$CONTAINER_NAME" -p $PORT:3000 $IMAGE_NAME
          else
            echo "New container failed to start."
            docker logs $NEW_CONTAINER_NAME
            exit 1
          fi