ci.yml

name: CI

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

jobs:
  # ---------------------------------------------------------------------------
  # Unit tests — pure Python, no external processes, no Docker.
  # Only installs requirements/dev.txt (Flask + strenum + pytest) — the heavy
  # converter packages (linkml, mdmodels, …) are not needed because the tests
  # inject mock converters and register_converters is a lazy import.
  # ---------------------------------------------------------------------------
  unit-tests:
    name: Unit tests
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v6

      - name: Set up Python 3.11
        uses: actions/setup-python@v6
        with:
          python-version: "3.11"
          cache: pip
          cache-dependency-path: requirements/dev.txt

      - name: Install test dependencies
        run: pip install -r requirements/dev.txt

      - name: Run unit tests
        run: python -m pytest tests/ -v --tb=short

  # ---------------------------------------------------------------------------
  # Build sub-packages (Java JAR + TypeScript dist)
  # ---------------------------------------------------------------------------
  build-subpackages:
    name: Build sub-packages
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v6

      - name: Set up Java 11
        uses: actions/setup-java@v5
        with:
          java-version: "11"
          distribution: temurin

      - name: Cache Maven repository
        uses: actions/cache@v5
        with:
          path: ~/.m2/repository
          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
          restore-keys: ${{ runner.os }}-maven-

      - name: Set up Node.js 18
        uses: actions/setup-node@v6
        with:
          node-version: "18"
          cache: npm
          cache-dependency-path: external_converters/node/package-lock.json

      - name: Build sub-packages
        run: bash scripts/build_subpackages.sh

      - name: Upload build artifacts
        uses: actions/upload-artifact@v6
        with:
          name: converter-artifacts
          retention-days: 1
          path: |
            external_converters/java/converter.jar
            external_converters/node/dist/

  # ---------------------------------------------------------------------------
  # Docker integration test — build image, start service, hit real endpoints
  # ---------------------------------------------------------------------------
  integration-test:
    name: Docker integration test
    runs-on: ubuntu-latest
    needs: build-subpackages

    steps:
      - uses: actions/checkout@v6

      - name: Download build artifacts
        uses: actions/download-artifact@v7
        with:
          name: converter-artifacts
          path: external_converters

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4

      - name: Build Docker image
        uses: docker/build-push-action@v7
        with:
          context: .
          file: deploy/docker/Dockerfile
          push: false
          load: true
          tags: schema-converter:ci
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: Start service
        run: docker run -d -p 5002:5002 --name schema-converter schema-converter:ci

      - name: Wait for service to become healthy
        run: |
          echo "Waiting for service (up to 3 minutes)..."
          for i in $(seq 1 36); do
            if curl -sf http://localhost:5002/health > /dev/null 2>&1; then
              echo "Service healthy after $((i * 5)) seconds"
              exit 0
            fi
            echo "  attempt $i/36 — retrying in 5 s"
            sleep 5
          done
          echo "Service failed to become healthy"
          docker logs schema-converter
          exit 1

      - name: Test /health endpoint
        run: |
          curl -sf http://localhost:5002/health \
            | python3 -c "import sys,json; d=json.load(sys.stdin); assert d['status']=='ok', d"

      - name: Test /convert — JsonSchema to LinkMl (direct path)
        run: |
          RESPONSE=$(curl -sf -X POST http://localhost:5002/convert \
            -H "Content-Type: application/json" \
            -d '{
              "sourceLanguage": "JsonSchema",
              "targetLanguage": "LinkMl",
              "schema": "{\"$schema\":\"http://json-schema.org/draft-07/schema#\",\"title\":\"Person\",\"type\":\"object\",\"properties\":{\"name\":{\"type\":\"string\"}}}"
            }')
          echo "$RESPONSE" | python3 -c "
          import sys, json
          d = json.load(sys.stdin)
          assert 'results' in d, f'Missing results key: {d}'
          assert len(d['results']) > 0, 'Empty results list'
          print('OK — got', len(d['results']), 'result(s)')
          "

      - name: Test /convert — unknown language returns 400
        run: |
          STATUS=$(curl -s -o /dev/null -w "%{http_code}" -X POST http://localhost:5002/convert \
            -H "Content-Type: application/json" \
            -d '{"sourceLanguage":"FakeLang","targetLanguage":"LinkMl","schema":"{}"}')
          [ "$STATUS" -eq 400 ] || { echo "Expected 400, got $STATUS"; exit 1; }

      - name: Test /convert — no path returns 400
        run: |
          STATUS=$(curl -s -o /dev/null -w "%{http_code}" -X POST http://localhost:5002/convert \
            -H "Content-Type: application/json" \
            -d '{"sourceLanguage":"Mermaid","targetLanguage":"Protobuf","schema":"{}"}')
          [ "$STATUS" -eq 400 ] || { echo "Expected 400, got $STATUS"; exit 1; }

      - name: Print container logs on failure
        if: failure()
        run: docker logs schema-converter

  # ---------------------------------------------------------------------------
  # Publish image to GHCR on every push to main
  # ---------------------------------------------------------------------------
  publish:
    name: Publish Docker image
    runs-on: ubuntu-latest
    needs: [unit-tests, integration-test]
    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
    permissions:
      contents: read
      packages: write

    steps:
      - uses: actions/checkout@v6

      - name: Download build artifacts
        uses: actions/download-artifact@v7
        with:
          name: converter-artifacts
          path: external_converters

      - name: Set lowercase image name
        run: |
          echo "IMAGE=ghcr.io/$(echo '${{ github.repository_owner }}' | tr '[:upper:]' '[:lower:]')/schema-conversion-orchestrator" >> $GITHUB_ENV

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4

      - name: Build and push
        uses: docker/build-push-action@v7
        with:
          context: .
          file: deploy/docker/Dockerfile
          push: true
          tags: |
            ${{ env.IMAGE }}:latest
            ${{ env.IMAGE }}:${{ github.sha }}
          cache-from: type=gha
          cache-to: type=gha,mode=max