name: DB Migration

on:
  push:
    branches: [main]
    paths:
      - 'crates/mem-store/migrations/**'
  workflow_dispatch:

env:
  DB_HOST: memory-db-rw.poimen.svc.cluster.local
  DB_PORT: "5432"
  DB_NAME: memory
  MIGRATIONS_DIR: crates/mem-store/migrations
  DOCKER_HOST: tcp://localhost:2375

jobs:
  migrate:
    name: Run Migrations
    runs-on: rust
    steps:
      - name: Install Node.js, Docker, and psql
        run: |
          apt-get update
          apt-get install -y nodejs docker.io postgresql-client

      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 2

      - name: Detect changed migrations
        id: detect
        run: |
          CHANGED=$(git diff --name-only HEAD~1 HEAD -- "$MIGRATIONS_DIR"/*.sql 2>/dev/null || echo "")
          if [ -n "$CHANGED" ]; then
            echo "files=$CHANGED" >> $GITHUB_OUTPUT
            echo "found=true" >> $GITHUB_OUTPUT
            echo "Changed: $CHANGED"
          else
            echo "found=false" >> $GITHUB_OUTPUT
            echo "No migration changes detected"
          fi

      - name: Apply changed migrations (push)
        if: github.event_name == 'push' && steps.detect.outputs.found == 'true'
        env:
          PGHOST: ${{ env.DB_HOST }}
          PGPORT: ${{ env.DB_PORT }}
          PGDATABASE: ${{ env.DB_NAME }}
          PGUSER: ${{ secrets.DB_USER }}
          PGPASSWORD: ${{ secrets.DB_PASSWORD }}
        run: |
          for f in ${{ steps.detect.outputs.files }}; do
            [ -f "$f" ] || continue
            echo "=== Applying: $f ==="
            psql -v ON_ERROR_STOP=1 -f "$f"
            echo "=== OK ==="
          done

      - name: Apply all migrations (dispatch)
        if: github.event_name == 'workflow_dispatch'
        env:
          PGHOST: ${{ env.DB_HOST }}
          PGPORT: ${{ env.DB_PORT }}
          PGDATABASE: ${{ env.DB_NAME }}
          PGUSER: ${{ secrets.DB_USER }}
          PGPASSWORD: ${{ secrets.DB_PASSWORD }}
        run: |
          for f in $(ls "$MIGRATIONS_DIR"/*.sql | sort); do
            echo "=== Applying: $f ==="
            psql -v ON_ERROR_STOP=1 -f "$f" || true
            echo "=== Done ==="
          done

      - name: Verify schema
        env:
          PGHOST: ${{ env.DB_HOST }}
          PGPORT: ${{ env.DB_PORT }}
          PGDATABASE: ${{ env.DB_NAME }}
          PGUSER: ${{ secrets.DB_USER }}
          PGPASSWORD: ${{ secrets.DB_PASSWORD }}
        run: |
          echo "=== Tables ==="
          psql -c "\dt memory*"
          echo "=== Entity Schema ==="
          psql -c "\d memory_entity"
          echo "=== Edge Schema ==="
          psql -c "\d memory_edge"