name: Push -> main

on:
  push:
    branches:
      - main

jobs:

  # ── 1. Build ──────────────────────────────────────────────────────────────────
  build:
    name: Build Docker image
    runs-on: prod-gatehouse-ui
    outputs:
      tag: ${{ steps.sha.outputs.tag }}

    steps:
      - uses: actions/checkout@v4

      - name: Set image tag
        id: sha
        run: echo "tag=$(git rev-parse --short HEAD)" >> "$GITHUB_OUTPUT"

      - name: Build ui image
        run: |
          # VITE_API_BASE_URL is baked into the static bundle at build time.
          # Source it from the deployed env on this (prod) runner.
          set -a; . /opt/gatehouse-ui/.env; set +a
          docker build \
            --build-arg VITE_API_BASE_URL="${VITE_API_BASE_URL}" \
            -t "gatehouse-ui:${{ steps.sha.outputs.tag }}" \
            -t "gatehouse-ui:latest" \
            .

      - name: Scan ui image for vulnerabilities (Trivy)
        run: |
          command -v trivy >/dev/null 2>&1 || \
            curl -sSfL https://raw.githubusercontent.com/aquasecurity/trivy/main/contrib/install.sh \
              | sh -s -- -b /usr/local/bin

          trivy image \
            --exit-code 0 \
            --severity HIGH,CRITICAL \
            --no-progress \
            "gatehouse-ui:${{ steps.sha.outputs.tag }}"

  # ── 2. Deploy ─────────────────────────────────────────────────────────────────
  deploy:
    name: Deploy
    runs-on: prod-gatehouse-ui
    needs: build
    env:
      COMPOSE_DIR: /opt/gatehouse-ui

    steps:
      - uses: actions/checkout@v4

      - name: Deploy (docker compose up)
        run: |
          cp docker-compose.yml "${COMPOSE_DIR}/docker-compose.yml"
          cd "${COMPOSE_DIR}"
          IMAGE_TAG="${{ needs.build.outputs.tag }}" docker compose up -d --remove-orphans

  # ── 3. Alert ──────────────────────────────────────────────────────────────────
  alert:
    name: Notify on result
    runs-on: prod-gatehouse-ui
    needs: deploy
    if: always()

    steps:
      - name: Send notification
        run: |
          STATUS="${{ needs.deploy.result }}"
          echo "TODO: send alert — deploy status: ${STATUS}"
          # curl -X POST "${{ secrets.ALERT_WEBHOOK }}" \
          #   -H 'Content-Type: application/json' \
          #   -d "{\"text\": \"[gatehouse-ui] Deploy ${STATUS} — tag: ${{ needs.build.outputs.tag }}\"}"