name: Build and Deploy

on:
  release:
    types: [published]

env:
  APP_NAME: delta-force-guide-server
  IMAGE_REGISTRY: ${{ vars.GITLAB_REGISTRY }}
  IMAGE_NAME: ${{ vars.GITLAB_IMAGE_NAME }}

jobs:
  # ================================================================
  # Job 1 — Package: build the JAR with Gradle
  # ================================================================
  package:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Set up JDK 21 (Corretto)
        uses: actions/setup-java@v4
        with:
          java-version: 21
          distribution: corretto
          cache: gradle

      - name: Set up Gradle
        uses: gradle/actions/setup-gradle@v4

      - name: Build with Gradle
        run: ./gradlew build

      - name: Upload JAR artifact
        uses: actions/upload-artifact@v4
        with:
          name: app-jar
          path: build/libs/delta-force-guide-server-*.jar
          retention-days: 1

  # ================================================================
  # Job 2 — Build & push Docker image to GitHub Container Registry
  # ================================================================
  build-and-push:
    needs: package
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v4

      - name: Download JAR artifact
        uses: actions/download-artifact@v4
        with:
          name: app-jar
          path: build/libs

      - name: Resolve JAR file path
        id: jar
        run: echo "file=$(ls build/libs/delta-force-guide-server-*.jar | head -1)" >> "$GITHUB_OUTPUT"

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

      - name: Log in to GitLab Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.IMAGE_REGISTRY }}
          username: ${{ vars.GITLAB_REGISTRY_USER }}
          password: ${{ secrets.GITLAB_REGISTRY_PASSWORD }}

      - name: Generate image tags
        id: meta
        run: |
          echo "version=${{ env.IMAGE_NAME }}:${{ github.event.release.tag_name }}" >> "$GITHUB_OUTPUT"
          echo "latest=${{ env.IMAGE_NAME }}:latest" >> "$GITHUB_OUTPUT"

      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          file: Dockerfile.ci
          build-args: JAR_FILE=${{ steps.jar.outputs.file }}
          push: true
          tags: |
            ${{ steps.meta.outputs.version }}
            ${{ steps.meta.outputs.latest }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  # ================================================================
  # Job 3 — Deploy on the target server via SSH
  # ================================================================
  deploy:
    needs: build-and-push
    runs-on: ubuntu-latest
    steps:
      - name: Deploy via SSH
        uses: appleboy/ssh-action@v1.2.0
        with:
          host: ${{ secrets.DEPLOY_HOST }}
          username: ${{ secrets.DEPLOY_USER }}
          key: ${{ secrets.DEPLOY_SSH_KEY }}
          script: |
            set -e

            echo '=== Pulling image ==='
            echo '${{ secrets.GITLAB_REGISTRY_PASSWORD }}' | docker login ${{ env.IMAGE_REGISTRY }} \
              -u ${{ vars.GITLAB_REGISTRY_USER }} --password-stdin
            docker pull ${{ env.IMAGE_NAME }}:${{ github.event.release.tag_name }}

            echo '=== Stopping old container ==='
            docker stop ${{ env.APP_NAME }} || true
            docker rm ${{ env.APP_NAME }} || true

            echo '=== Starting new container ==='
            docker run -d \
              --name ${{ env.APP_NAME }} \
              --restart unless-stopped \
              -p ${DEPLOY_PORT:-8080}:8080 \
              ${{ env.IMAGE_NAME }}:${{ github.event.release.tag_name }}

            echo '=== Cleaning up old images ==='
            docker image prune -f

            echo '=== Deployment complete ==='