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

jobs:
  migrate:
    name: Run Migrations
    runs-on: rust
    steps:
      - name: Install psql
        run: apt-get update && apt-get install -y postgresql-client

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

      - name: Fetch previous migrations state
        run: |
          git fetch origin main --depth=2
          # List changed migration files
          CHANGED=$(git diff --name-only HEAD~1 HEAD -- crates/mem-store/migrations/ || echo "")
          echo "Changed migrations: $CHANGED"
          echo "CHANGED_MIGRATIONS=$CHANGED" >> $GITHUB_ENV

      - name: Run migrations
        if: env.CHANGED_MIGRATIONS != ''
        run: |
          export PGPASSWORD="${DB_PASSWORD}"

          echo "=== Running changed migrations ==="
          for f in $CHANGED_MIGRATIONS; do
            if [ -f "$f" ]; then
              echo "--- Applying: $f ---"
              psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -f "$f" 2>&1
              if [ $? -ne 0 ]; then
                echo "ERROR: Migration $f failed!"
                exit 1
              fi
              echo "--- OK: $f ---"
            fi
          done

          echo "=== Verify schema ==="
          psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -c "\dt memory*"
        env:
          DB_USER: ${{ secrets.DB_USER }}
          DB_PASSWORD: ${{ secrets.DB_PASSWORD }}

      - name: Run all migrations (manual trigger)
        if: github.event_name == 'workflow_dispatch'
        run: |
          export PGPASSWORD="${DB_PASSWORD}"

          echo "=== Running all migrations in order ==="
          for f in $(ls crates/mem-store/migrations/*.sql | sort); do
            echo "--- Applying: $f ---"
            psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -f "$f" 2>&1 || true
            echo "--- Done: $f ---"
          done

          echo "=== Final schema ==="
          psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -c "\dt memory*"
          psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -c "\d memory_entity"
          psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -c "\d memory_edge"
        env:
          DB_USER: ${{ secrets.DB_USER }}
          DB_PASSWORD: ${{ secrets.DB_PASSWORD }}