name: PostgreSQL Compatibility Matrix

on:
  push:
    branches: ["main", "master"]
  pull_request:

jobs:
  pg-compat:
    name: PG${{ matrix.pg_version }} smoke
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        pg_version: ["14", "15", "16", "17", "18"]

    services:
      postgres:
        image: postgres:${{ matrix.pg_version }}
        env:
          POSTGRES_DB: compatdb
          POSTGRES_USER: postgres
          POSTGRES_PASSWORD: postgres
        ports:
          - 5432:5432
        options: >-
          --health-cmd "pg_isready -U postgres -d compatdb"
          --health-interval 5s
          --health-timeout 5s
          --health-retries 20

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.12"

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

      - name: Enable pg_stat_statements in service container
        run: |
          PG_CID="$(docker ps --filter "ancestor=postgres:${{ matrix.pg_version }}" --format "{{.ID}}" | head -n1)"
          if [ -z "$PG_CID" ]; then
            echo "Could not find postgres service container for version ${{ matrix.pg_version }}"
            docker ps -a
            exit 1
          fi

          echo "Using postgres container: $PG_CID"
          docker exec "$PG_CID" psql -U postgres -d compatdb -c "ALTER SYSTEM SET shared_preload_libraries = 'pg_stat_statements';"
          docker restart "$PG_CID"

          for i in $(seq 1 40); do
            if docker exec "$PG_CID" pg_isready -U postgres -d compatdb; then
              break
            fi
            sleep 2
          done

          docker exec "$PG_CID" psql -U postgres -d compatdb -c "CREATE EXTENSION IF NOT EXISTS pg_stat_statements;"

      - name: Run PostgreSQL compatibility smoke checks
        env:
          PG_DSN_CANDIDATES: postgresql://postgres:postgres@postgres:5432/compatdb?sslmode=disable,postgresql://postgres:postgres@127.0.0.1:5432/compatdb?sslmode=disable
        run: python backend/scripts/pg_compat_smoke.py
