name: Publish to NPM

on:
  push:
    branches: [main]
  workflow_dispatch:

jobs:
  publish:
    runs-on: ubuntu-latest
    
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'
          registry-url: 'https://registry.npmjs.org'

      - name: Setup pnpm
        uses: pnpm/action-setup@v2
        with:
          version: 10

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      - name: Run tests
        run: pnpm test:int

      - name: Build
        run: pnpm build

      - name: Check if should publish
        id: version-check
        run: |
          # Get current version from package.json
          CURRENT_VERSION=$(node -p "require('./package.json').version")
          echo "current=$CURRENT_VERSION" >> $GITHUB_OUTPUT
          
          # Check if this is a version bump commit (created by npm version)
          COMMIT_MSG=$(git log -1 --pretty=%B)
          if echo "$COMMIT_MSG" | grep -q "^v[0-9]"; then
            echo "changed=true" >> $GITHUB_OUTPUT
            echo "Version bump commit detected: $COMMIT_MSG"
          # Or check if package.json was modified in this commit
          elif git diff --name-only HEAD~1 HEAD | grep -q "package.json"; then
            # Check if the version actually changed
            git show HEAD~1:package.json > prev-package.json 2>/dev/null || echo '{"version":"0.0.0"}' > prev-package.json
            PREVIOUS_VERSION=$(node -p "require('./prev-package.json').version")
            
            if [ "$CURRENT_VERSION" != "$PREVIOUS_VERSION" ]; then
              echo "changed=true" >> $GITHUB_OUTPUT
              echo "Version changed from $PREVIOUS_VERSION to $CURRENT_VERSION"
            else
              echo "changed=false" >> $GITHUB_OUTPUT
              echo "package.json modified but version unchanged: $CURRENT_VERSION"
            fi
          else
            echo "changed=false" >> $GITHUB_OUTPUT
            echo "No version change detected"
          fi

      - name: Publish to NPM
        if: steps.version-check.outputs.changed == 'true'
        run: npm publish
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

      - name: Create GitHub Release
        if: steps.version-check.outputs.changed == 'true'
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: v${{ steps.version-check.outputs.current }}
          release_name: Release v${{ steps.version-check.outputs.current }}
          draft: false
          prerelease: false