name: Documentation

on:
  push:
    branches: [ main, develop ]
    paths:
      - 'docs/**'
      - 'README.md'
      - 'CONTRIBUTING.md'
      - 'src/**/*.py'
  pull_request:
    paths:
      - 'docs/**'
      - 'README.md'
      - 'CONTRIBUTING.md'
  workflow_dispatch:

env:
  PYTHON_VERSION: '3.11'

jobs:
  # Validate documentation
  validate-docs:
    name: Validate Documentation
    runs-on: ubuntu-latest
    
    steps:
    - name: Checkout code
      uses: actions/checkout@v4
      with:
        token: ${{ secrets.GITEA_TOKEN }}
      
    - name: Set up Python
      uses: actions/setup-python@v4
      with:
        python-version: ${{ env.PYTHON_VERSION }}
        
    - name: Install documentation tools
      run: |
        python -m pip install --upgrade pip
        pip install -r requirements.txt
        pip install sphinx sphinx-rtd-theme sphinx-autodoc-typehints
        pip install markdown-link-check || true
        
    - name: Check markdown links
      run: |
        echo "🔗 Checking markdown links..."
        find . -name "*.md" -not -path "./.git/*" -not -path "./node_modules/*" | while read file; do
          echo "Checking $file"
          # Basic link validation (you can enhance this)
          grep -o 'http[s]*://[^)]*' "$file" | while read url; do
            if curl -s --head "$url" | head -n 1 | grep -q "200 OK"; then
              echo "✅ $url"
            else
              echo "❌ $url (in $file)"
            fi
          done
        done
        
    - name: Validate README structure
      run: |
        echo "📋 Validating README structure..."
        
        required_sections=(
          "# Northern Thailand Ping River Monitor"
          "## Features"
          "## Quick Start"
          "## Installation"
          "## Usage"
          "## API Endpoints"
          "## Docker"
          "## Contributing"
          "## License"
        )
        
        for section in "${required_sections[@]}"; do
          if grep -q "$section" README.md; then
            echo "✅ Found: $section"
          else
            echo "❌ Missing: $section"
          fi
        done
        
    - name: Check documentation completeness
      run: |
        echo "📚 Checking documentation completeness..."
        
        # Check if all Python modules have docstrings
        python -c "
        import ast
        import os
        
        def check_docstrings(filepath):
            with open(filepath, 'r', encoding='utf-8') as f:
                tree = ast.parse(f.read())
            
            missing_docstrings = []
            
            for node in ast.walk(tree):
                if isinstance(node, (ast.FunctionDef, ast.ClassDef, ast.AsyncFunctionDef)):
                    if not ast.get_docstring(node):
                        missing_docstrings.append(f'{node.name} in {filepath}')
            
            return missing_docstrings
        
        all_missing = []
        for root, dirs, files in os.walk('src'):
            for file in files:
                if file.endswith('.py') and not file.startswith('__'):
                    filepath = os.path.join(root, file)
                    missing = check_docstrings(filepath)
                    all_missing.extend(missing)
        
        if all_missing:
            print('⚠️ Missing docstrings:')
            for item in all_missing[:10]:  # Show first 10
                print(f'  - {item}')
            if len(all_missing) > 10:
                print(f'  ... and {len(all_missing) - 10} more')
        else:
            print('✅ All functions and classes have docstrings')
        "

  # Generate API documentation
  generate-api-docs:
    name: Generate API Documentation
    runs-on: ubuntu-latest
    
    steps:
    - name: Checkout code
      uses: actions/checkout@v4
      with:
        token: ${{ secrets.GITEA_TOKEN }}
      
    - name: Set up Python
      uses: actions/setup-python@v4
      with:
        python-version: ${{ env.PYTHON_VERSION }}
        
    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install -r requirements.txt
        
    - name: Generate OpenAPI spec
      run: |
        echo "📝 Generating OpenAPI specification..."
        python -c "
        import json
        import sys
        sys.path.insert(0, 'src')
        
        try:
            from web_api import app
            openapi_spec = app.openapi()
            
            with open('openapi.json', 'w') as f:
                json.dump(openapi_spec, f, indent=2)
            
            print('✅ OpenAPI spec generated: openapi.json')
        except Exception as e:
            print(f'❌ Failed to generate OpenAPI spec: {e}')
        "
        
    - name: Generate API documentation
      run: |
        echo "📖 Generating API documentation..."
        
        # Create API documentation from OpenAPI spec
        if [ -f openapi.json ]; then
          cat > api-docs.md << 'EOF'
        # API Documentation
        
        This document describes the REST API endpoints for the Northern Thailand Ping River Monitor.
        
        ## Base URL
        
        - Production: `https://ping-river-monitor.b4l.co.th`
        - Staging: `https://staging.ping-river-monitor.b4l.co.th`
        - Development: `http://localhost:8000`
        
        ## Authentication
        
        Currently, the API does not require authentication. This may change in future versions.
        
        ## Endpoints
        
        EOF
          
          # Extract endpoints from OpenAPI spec
          python -c "
        import json
        
        with open('openapi.json', 'r') as f:
            spec = json.load(f)
        
        for path, methods in spec.get('paths', {}).items():
            for method, details in methods.items():
                print(f'### {method.upper()} {path}')
                print()
                print(details.get('summary', 'No description available'))
                print()
                if 'parameters' in details:
                    print('**Parameters:**')
                    for param in details['parameters']:
                        print(f'- `{param[\"name\"]}` ({param.get(\"in\", \"query\")}): {param.get(\"description\", \"No description\")}')
                    print()
                print('---')
                print()
          " >> api-docs.md
          
          echo "✅ API documentation generated: api-docs.md"
        fi
        
    - name: Upload documentation artifacts
      uses: actions/upload-artifact@v3
      with:
        name: documentation-${{ github.run_number }}
        path: |
          openapi.json
          api-docs.md

  # Build Sphinx documentation
  build-sphinx-docs:
    name: Build Sphinx Documentation
    runs-on: ubuntu-latest
    
    steps:
    - name: Checkout code
      uses: actions/checkout@v4
      with:
        token: ${{ secrets.GITEA_TOKEN }}
      
    - name: Set up Python
      uses: actions/setup-python@v4
      with:
        python-version: ${{ env.PYTHON_VERSION }}
        
    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install -r requirements.txt
        pip install sphinx sphinx-rtd-theme sphinx-autodoc-typehints
        
    - name: Create Sphinx configuration
      run: |
        mkdir -p docs/sphinx
        
        cat > docs/sphinx/conf.py << 'EOF'
        import os
        import sys
        sys.path.insert(0, os.path.abspath('../../src'))
        
        project = 'Northern Thailand Ping River Monitor'
        copyright = '2025, Ping River Monitor Team'
        author = 'Ping River Monitor Team'
        version = '3.1.3'
        release = '3.1.3'
        
        extensions = [
            'sphinx.ext.autodoc',
            'sphinx.ext.viewcode',
            'sphinx.ext.napoleon',
            'sphinx_autodoc_typehints',
        ]
        
        templates_path = ['_templates']
        exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
        
        html_theme = 'sphinx_rtd_theme'
        html_static_path = ['_static']
        
        autodoc_default_options = {
            'members': True,
            'member-order': 'bysource',
            'special-members': '__init__',
            'undoc-members': True,
            'exclude-members': '__weakref__'
        }
        EOF
        
        cat > docs/sphinx/index.rst << 'EOF'
        Northern Thailand Ping River Monitor Documentation
        ================================================
        
        .. toctree::
           :maxdepth: 2
           :caption: Contents:
        
           modules
        
        Indices and tables
        ==================
        
        * :ref:`genindex`
        * :ref:`modindex`
        * :ref:`search`
        EOF
        
    - name: Generate module documentation
      run: |
        cd docs/sphinx
        sphinx-apidoc -o . ../../src
        
    - name: Build documentation
      run: |
        cd docs/sphinx
        sphinx-build -b html . _build/html
        
    - name: Upload Sphinx documentation
      uses: actions/upload-artifact@v3
      with:
        name: sphinx-docs-${{ github.run_number }}
        path: docs/sphinx/_build/html/

  # Documentation summary
  docs-summary:
    name: Documentation Summary
    runs-on: ubuntu-latest
    needs: [validate-docs, generate-api-docs, build-sphinx-docs]
    if: always()
    
    steps:
    - name: Generate documentation summary
      run: |
        echo "# 📚 Documentation Build Summary" > docs-summary.md
        echo "" >> docs-summary.md
        echo "**Build Date:** $(date -u)" >> docs-summary.md
        echo "**Repository:** ${{ github.repository }}" >> docs-summary.md
        echo "**Commit:** ${{ github.sha }}" >> docs-summary.md
        echo "" >> docs-summary.md
        
        echo "## 📊 Results" >> docs-summary.md
        echo "" >> docs-summary.md
        
        if [ "${{ needs.validate-docs.result }}" = "success" ]; then
          echo "- ✅ **Documentation Validation**: Passed" >> docs-summary.md
        else
          echo "- ❌ **Documentation Validation**: Failed" >> docs-summary.md
        fi
        
        if [ "${{ needs.generate-api-docs.result }}" = "success" ]; then
          echo "- ✅ **API Documentation**: Generated" >> docs-summary.md
        else
          echo "- ❌ **API Documentation**: Failed" >> docs-summary.md
        fi
        
        if [ "${{ needs.build-sphinx-docs.result }}" = "success" ]; then
          echo "- ✅ **Sphinx Documentation**: Built" >> docs-summary.md
        else
          echo "- ❌ **Sphinx Documentation**: Failed" >> docs-summary.md
        fi
        
        echo "" >> docs-summary.md
        echo "## 🔗 Available Documentation" >> docs-summary.md
        echo "" >> docs-summary.md
        echo "- [README.md](../README.md)" >> docs-summary.md
        echo "- [API Documentation](../docs/)" >> docs-summary.md
        echo "- [Contributing Guide](../CONTRIBUTING.md)" >> docs-summary.md
        echo "- [Deployment Checklist](../DEPLOYMENT_CHECKLIST.md)" >> docs-summary.md
        
        cat docs-summary.md
        
    - name: Upload documentation summary
      uses: actions/upload-artifact@v3
      with:
        name: docs-summary-${{ github.run_number }}
        path: docs-summary.md