name: Validate n8n Workflows

on:
  push:
    branches: [ main, master ]
  pull_request:
    branches: [ main, master ]
  workflow_dispatch:  # Allow manual triggering

jobs:
  validate-workflows:
    name: Validate n8n Workflows
    runs-on: ubuntu-latest
    
    steps:
    - name: Checkout repository
      uses: actions/checkout@v4
    
    - name: Set up Python
      uses: actions/setup-python@v5
      with:
        python-version: '3.10'
    
    - name: Install dependencies
      working-directory: ./lib
      run: |
        python -m pip install --upgrade pip
        pip install -r requirements.txt
        pip install -e .
    
    - name: Run workflow validation
      id: validate
      working-directory: ./lib
      run: |
        # Run the validator on all JSON files in the repository
        # This will fail if any workflow is invalid
        echo "Validating all n8n workflows..."
        if ! n8n-validate ..; then
          echo "::error::One or more workflow validations failed"
          exit 1
        fi
        echo "All workflows are valid!"
    
    - name: Create visualization artifacts
      if: always()  # Run this step even if validation fails
      working-directory: ./lib
      run: |
        echo "Creating visualizations for all workflows..."
        mkdir -p ../workflow-visualizations
        
        # Find all JSON files that might be n8n workflows
        find .. -type f -name "*.json" -not -path "*/node_modules/*" -not -path "*/.git/*" -not -path "*/workflow-visualizations/*" | while read -r file; do
          # Try to validate the file first
          if n8n-validate "$file" 2>/dev/null; then
            # If validation passes, create a visualization
            echo "Creating visualization for $file"
            filename=$(basename "$file" .json)
            output_file="../workflow-visualizations/${filename}.png"
            if ! n8n-visualize "$file" -o "$output_file" --no-show 2>/dev/null; then
              echo "::warning::Failed to create visualization for $file"
            fi
          fi
        done
        
        # Count the number of visualizations created
        VIS_COUNT=$(find ../workflow-visualizations -type f -name "*.png" | wc -l)
        echo "Created $VIS_COUNT workflow visualizations"
        
        # Set an output with the visualization count
        echo "visualization_count=$VIS_COUNT" >> $GITHUB_OUTPUT
    
    - name: Upload workflow visualizations
      if: always() && steps.validate.outcome == 'success'
      uses: actions/upload-artifact@v4
      with:
        name: workflow-visualizations
        path: workflow-visualizations/
        if-no-files-found: ignore
        retention-days: 7
    
    - name: Comment on PR with validation results
      if: github.event_name == 'pull_request' && steps.validate.outcome == 'success'
      uses: actions/github-script@v7
      with:
        script: |
          const fs = require('fs');
          const { execSync } = require('child_process');
          
          // Get the list of workflow files that were validated
          const workflowFiles = execSync('find .. -type f -name "*.json" -not -path "*/node_modules/*" -not -path "*/.git/*" -not -path "*/workflow-visualizations/*"')
            .toString()
            .split('\n')
            .filter(Boolean);
          
          // Count visualizations
          let visCount = 0;
          try {
            visCount = fs.readdirSync('../workflow-visualizations').length;
          } catch (e) {
            // Directory might not exist if no visualizations were created
          }
          
          // Create a comment
          const comment = `✅ All ${workflowFiles.length} n8n workflow files are valid!\n` +
                         `📊 ${visCount} workflow visualizations were generated and attached as artifacts.`;
          
          // Add a comment to the PR
          const { data: comments } = await github.rest.issues.listComments({
            owner: context.repo.owner,
            repo: context.repo.repo,
            issue_number: context.issue.number,
          });
          
          const botComment = comments.find(comment => 
            comment.user.login === 'github-actions[bot]' && 
            comment.body.includes('n8n workflow')
          );
          
          if (botComment) {
            await github.rest.issues.updateComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              comment_id: botComment.id,
              body: comment,
            });
          } else {
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: comment,
            });
          }