name: Pipeline

on:
  push:
    branches: ['*']
    tags: ['v*']
  pull_request:
    branches: [main]

env:
  REGISTRY: git.holo-grid.bar
  IMAGE_TONGO: git.holo-grid.bar/costap/quarkshologridledger/tongo-core
  IMAGE_WEB: git.holo-grid.bar/costap/quarkshologridledger/web-terminal

jobs:
  # ── JOB 1: CI (LINT & TEST) ─────────────────────────────────
  ci-backend:
    runs-on: docker
    steps:
      - uses: actions/checkout@v4

      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          go-version: '1.23'

      - name: Lint
        working-directory: tongo-core
        run: |
          go install github.com/golangci/golangci-lint/cmd/golangci-lint@latest
          golangci-lint run ./...

      - name: Test
        working-directory: tongo-core
        run: go test -race -coverprofile=coverage.out ./...

  ci-frontend:
    runs-on: docker
    steps:
      - uses: actions/checkout@v4

      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: '22'

      - name: Install
        working-directory: web-terminal
        run: npm ci

      - name: Lint & Format Check
        working-directory: web-terminal
        run: npm run format

      - name: Type Check
        working-directory: web-terminal
        run: npx tsc --noEmit

  # ── JOB 2: INFRASTRUCTURE PLAN ──────────────────────────────
  infra-plan:
    runs-on: docker
    steps:
      - uses: actions/checkout@v4

      - name: Setup OpenTofu
        uses: opentofu/setup-opentofu@v1

      - name: Set environment target
        id: target
        run: |
          if [[ "${{ github.ref }}" == refs/tags/v* ]]; then
            echo "env_name=production" >> $GITHUB_OUTPUT
          else
            echo "env_name=staging" >> $GITHUB_OUTPUT
          fi

      - name: Init and Plan
        working-directory: infra
        env:
          HCLOUD_TOKEN: ${{ secrets.HCLOUD_TOKEN }}
          ENV_NAME: ${{ steps.target.outputs.env_name }}
          TF_VAR_hcloud_token: ${{ secrets.HCLOUD_TOKEN }}
          TF_VAR_ssh_public_key: ${{ secrets.SSH_PUBLIC_KEY }}
          TF_VAR_domain: "holo-grid.bar"
          TF_VAR_forgejo_domain: "git.holo-grid.bar"
        run: |
          tofu init
          tofu workspace select $ENV_NAME || tofu workspace new $ENV_NAME
          tofu plan -out=tfplan

      - name: Upload plan artifact
        if: github.event_name == 'pull_request'
        uses: actions/upload-artifact@v4
        with:
          name: tfplan
          path: infra/tfplan

  # ── JOB 3: INFRASTRUCTURE APPLY (Depends on Plan and CI) ────
  infra-apply:
    runs-on: docker
    needs: [ci-backend, ci-frontend, infra-plan]
    if: (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')) && github.event_name == 'push'
    steps:
      - uses: actions/checkout@v4

      - name: Setup OpenTofu
        uses: opentofu/setup-opentofu@v1

      - name: Set environment target
        id: target
        run: |
          if [[ "${{ github.ref }}" == refs/tags/v* ]]; then
            echo "env_name=production" >> $GITHUB_OUTPUT
          else
            echo "env_name=staging" >> $GITHUB_OUTPUT
          fi

      - name: Init and Apply
        working-directory: infra
        env:
          HCLOUD_TOKEN: ${{ secrets.HCLOUD_TOKEN }}
          ENV_NAME: ${{ steps.target.outputs.env_name }}
          TF_VAR_hcloud_token: ${{ secrets.HCLOUD_TOKEN }}
          TF_VAR_ssh_public_key: ${{ secrets.SSH_PUBLIC_KEY }}
          TF_VAR_domain: "holo-grid.bar"
          TF_VAR_forgejo_domain: "git.holo-grid.bar"
        run: |
          tofu init
          tofu workspace select $ENV_NAME || tofu workspace new $ENV_NAME
          tofu apply -auto-approve

  # ── JOB 4: BUILD AND PUSH DOCKER (Depends on CI) ────────────
  build-and-push:
    runs-on: docker
    needs: [ci-backend, ci-frontend]
    if: (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')) && github.event_name == 'push'
    steps:
      - uses: actions/checkout@v4

      - name: Set image tag
        run: |
          if [ "${{ github.ref_type }}" = "tag" ]; then
            echo "TAG=${{ github.ref_name }}" >> $GITHUB_ENV
          else
            echo "TAG=sha-$(git rev-parse --short HEAD)" >> $GITHUB_ENV
          fi

      - name: Login to Forgejo Registry
        run: echo "${{ secrets.REGISTRY_TOKEN }}" | docker login $REGISTRY -u ${{ secrets.REGISTRY_USER }} --password-stdin

      - name: Build & Push Tongo Core
        run: |
          docker build -t $IMAGE_TONGO:$TAG -t $IMAGE_TONGO:latest -f tongo-core/Dockerfile .
          docker push $IMAGE_TONGO:$TAG
          docker push $IMAGE_TONGO:latest

      - name: Build & Push Web Terminal
        run: |
          docker build -t $IMAGE_WEB:$TAG -t $IMAGE_WEB:latest -f web-terminal/Dockerfile .
          docker push $IMAGE_WEB:$TAG
          docker push $IMAGE_WEB:latest

  # ── JOB 5: DEPLOY (Depends on Apply and Build) ──────────────
  deploy:
    runs-on: docker
    needs: [infra-apply, build-and-push]
    steps:
      - uses: actions/checkout@v4

      - name: Set environment target variables
        id: target
        run: |
          if [[ "${{ github.ref }}" == refs/tags/v* ]]; then
            echo "env_name=production" >> $GITHUB_OUTPUT
            echo "deploy_host=${{ secrets.DEPLOY_HOST_PROD }}" >> $GITHUB_OUTPUT
            echo "deploy_key<<EOF" >> $GITHUB_OUTPUT
            echo "${{ secrets.DEPLOY_SSH_KEY_PROD }}" >> $GITHUB_OUTPUT
            echo "EOF" >> $GITHUB_OUTPUT
          else
            echo "env_name=staging" >> $GITHUB_OUTPUT
            echo "deploy_host=${{ secrets.DEPLOY_HOST_STAGING }}" >> $GITHUB_OUTPUT
            echo "deploy_key<<EOF" >> $GITHUB_OUTPUT
            echo "${{ secrets.DEPLOY_SSH_KEY_STAGING }}" >> $GITHUB_OUTPUT
            echo "EOF" >> $GITHUB_OUTPUT
          fi

      - name: Deploy to Hetzner target environment
        env:
          ENV_NAME: ${{ steps.target.outputs.env_name }}
          DEPLOY_HOST: ${{ steps.target.outputs.deploy_host }}
          DEPLOY_KEY: ${{ steps.target.outputs.deploy_key }}
        run: |
          mkdir -p ~/.ssh
          echo "$DEPLOY_KEY" > ~/.ssh/deploy_key
          chmod 600 ~/.ssh/deploy_key

          # Copy production compose file and configuration
          scp -i ~/.ssh/deploy_key -o StrictHostKeyChecking=no \
            deploy/docker-compose.prod.yml \
            deploy/Caddyfile \
            deploy@$DEPLOY_HOST:/opt/hologrid/

          # Pull new images and restart the stack
          ssh -i ~/.ssh/deploy_key -o StrictHostKeyChecking=no deploy@$DEPLOY_HOST << 'EOF'
            cd /opt/hologrid
            echo "${{ secrets.REGISTRY_TOKEN }}" | docker login ${{ env.REGISTRY }} -u ${{ secrets.REGISTRY_USER }} --password-stdin
            docker compose -f docker-compose.prod.yml pull
            docker compose -f docker-compose.prod.yml up -d --remove-orphans
            docker image prune -f
          EOF