validate-move.yml

name: Validate Chess Move

on:
  pull_request:
    types: [opened, synchronize, reopened]
    paths:
      - 'games/*/moves.json'

jobs:
  validate-move:
    runs-on: ubuntu-latest
    
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
      
      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'
      
      - name: Install dependencies
        run: npm ci
      
      - name: Build project
        run: npm run build
      
      - name: Get changed files
        id: changed-files
        run: |
          echo "files=$(git diff --name-only origin/${{ github.base_ref }}...${{ github.sha }} | grep '^games/.*/moves.json$' | head -1)" >> $GITHUB_OUTPUT
      
      - name: Extract game ID
        id: game-info
        run: |
          FILE="${{ steps.changed-files.outputs.files }}"
          if [ -n "$FILE" ]; then
            GAME_ID=$(echo "$FILE" | cut -d'/' -f2)
            echo "game_id=$GAME_ID" >> $GITHUB_OUTPUT
          fi
      
      - name: Validate move
        if: steps.game-info.outputs.game_id
        run: |
          node dist/validation/index.js validate \
            --game-id "${{ steps.game-info.outputs.game_id }}" \
            --player "${{ github.event.pull_request.user.login }}"
      
      - name: Check game status
        if: steps.game-info.outputs.game_id
        id: game-status
        run: |
          STATUS=$(node dist/validation/index.js status --game-id "${{ steps.game-info.outputs.game_id }}")
          echo "status=$STATUS" >> $GITHUB_OUTPUT
      
      - name: Comment on PR - Valid Move
        if: success() && steps.game-info.outputs.game_id
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const gameId = '${{ steps.game-info.outputs.game_id }}';
            const status = '${{ steps.game-status.outputs.status }}';
            
            let message = `✅ **Move validated successfully!**\n\n`;
            message += `Game ID: \`${gameId}\`\n`;
            message += `Status: ${status}\n\n`;
            message += `Your move has been validated and is ready to be merged.`;
            
            if (status.includes('Check')) {
              message += `\n\n⚠️ **Check!** The opponent's king is in check.`;
            }
            
            if (status.includes('Checkmate')) {
              message += `\n\n🎉 **Checkmate!** Game over. You win!`;
            }
            
            if (status.includes('Stalemate')) {
              message += `\n\n🤝 **Stalemate!** The game is a draw.`;
            }
            
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: message
            });
      
      - name: Comment on PR - Invalid Move
        if: failure() && steps.game-info.outputs.game_id
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const gameId = '${{ steps.game-info.outputs.game_id }}';
            
            let message = `❌ **Invalid move detected!**\n\n`;
            message += `Game ID: \`${gameId}\`\n\n`;
            message += `Please check:\n`;
            message += `- It's your turn to move\n`;
            message += `- The move follows chess rules\n`;
            message += `- You're not moving into check\n`;
            message += `- The piece exists at the source square\n\n`;
            message += `Use the CLI tool to validate your move locally:\n`;
            message += `\`\`\`bash\ngitchess move <from> <to> --game ${gameId}\n\`\`\``;
            
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: message
            });
      
      - name: Auto-merge if valid
        if: success() && steps.game-info.outputs.game_id && !contains(steps.game-status.outputs.status, 'mate')
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            github.rest.pulls.merge({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: context.issue.number,
              merge_method: 'squash'
            });