# Single pipeline: verify → build → push.
# One workflow per push, one concurrency group per branch.
name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

concurrency:
  group: ci-${{ github.ref }}
  cancel-in-progress: true

env:
  REGISTRY: forgejo.riotpiao.com
  IMAGE: forgejo.riotpiao.com/rock/api-gateway

jobs:
  verify:
    name: Vet, test, build
    runs-on: golang
    steps:
      - name: Install Node.js for actions runtime
        run: apt-get update && apt-get install -y nodejs

      - uses: actions/checkout@v4

      - name: go vet
        run: go vet ./...

      - name: go test -race
        run: go test ./... -race

      - name: Static build (smoke)
        run: CGO_ENABLED=0 go build -trimpath -o gateway ./cmd/gateway

  push:
    name: Build and push image
    needs: verify
    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
    runs-on: golang
    steps:
      - name: Install Docker CLI and Node.js
        run: |
          apt-get update
          apt-get install -y --no-install-recommends docker.io nodejs git
          rm -rf /var/lib/apt/lists/*

      - uses: actions/checkout@v4

      - name: Get short SHA
        id: sha
        run: |
          SHORT_SHA=$(git rev-parse --short HEAD)
          echo "short_sha=${SHORT_SHA}" >> $GITHUB_OUTPUT

      - name: Registry login
        run: |
          echo "${REGISTRY_PAT}" | docker login "${REGISTRY}" \
            --username rock --password-stdin
        env:
          REGISTRY_PAT: ${{ secrets.REGISTRY_PAT }}

      - name: Build image
        run: |
          docker build \
            --build-arg "VERSION=${{ steps.sha.outputs.short_sha }}" \
            -t "${IMAGE}:${{ steps.sha.outputs.short_sha }}" \
            -t "${IMAGE}:latest" \
            .

      - name: Push image
        run: |
          docker push "${IMAGE}:${{ steps.sha.outputs.short_sha }}"
          docker push "${IMAGE}:latest"
          echo "✓ Image pushed: ${IMAGE}:${{ steps.sha.outputs.short_sha }}"

      - name: Prune unused images
        run: |
          docker image prune -a --force 2>&1 | tail -3 || true