"""
Code Formatter Agent

Formats code according to style guides and coding standards for
various programming languages.
"""

from typing import Any, Dict, List
from agents.base import BaseAgent


class CodeFormatterAgent(BaseAgent):
    """
    Formats code according to style standards.

    Supports:
    - Black (Python)
    - Prettier (JavaScript/TypeScript)
    - gofmt (Go)
    - rustfmt (Rust)
    - Custom formatting rules
    """

    def __init__(self):
        super().__init__(
            name='code-formatter',
            description='Format code according to style standards',
            category='engineering',
            version='1.0.0',
            tags=['formatting', 'code-style', 'linting', 'standards']
        )

    async def execute(self, params: Dict[str, Any]) -> Dict[str, Any]:
        """
        Format code.

        Args:
            params: {
                'target_path': str,
                'language': 'python|javascript|typescript|go|rust',
                'formatter': 'black|prettier|gofmt|rustfmt|custom',
                'options': {
                    'line_length': int,
                    'indent_size': int,
                    'use_tabs': bool,
                    'trailing_comma': bool,
                    'fix_in_place': bool,
                    'check_only': bool
                }
            }

        Returns:
            {
                'status': 'success|failed',
                'files_formatted': List[str],
                'changes_made': int,
                'formatting_issues': List[Dict],
                'style_violations': List[Dict]
            }
        """
        target_path = params.get('target_path')
        language = params.get('language', 'python')
        formatter = params.get('formatter', self._get_default_formatter(language))
        options = params.get('options', {})

        self.logger.info(
            f"Formatting code in {target_path} with {formatter}"
        )

        # Mock formatting results
        files_formatted = [
            'src/main.py',
            'src/api/routes.py',
            'src/services/user_service.py',
            'src/models/user.py',
            'src/utils/helpers.py'
        ]

        formatting_issues = [
            {
                'file': 'src/main.py',
                'line': 23,
                'issue': 'Line too long (92 > 88 characters)',
                'fixed': True
            },
            {
                'file': 'src/api/routes.py',
                'line': 45,
                'issue': 'Missing trailing comma',
                'fixed': True
            },
            {
                'file': 'src/services/user_service.py',
                'line': 67,
                'issue': 'Incorrect indentation (2 spaces instead of 4)',
                'fixed': True
            },
            {
                'file': 'src/models/user.py',
                'line': 12,
                'issue': 'Multiple imports on one line',
                'fixed': True
            }
        ]

        style_violations = [
            {
                'file': 'src/utils/helpers.py',
                'line': 34,
                'rule': 'E501',
                'message': 'Line too long',
                'severity': 'warning'
            },
            {
                'file': 'src/main.py',
                'line': 56,
                'rule': 'W503',
                'message': 'Line break before binary operator',
                'severity': 'info'
            }
        ]

        return {
            'status': 'success',
            'target_path': target_path,
            'language': language,
            'formatter': formatter,
            'files_formatted': files_formatted,
            'total_files': len(files_formatted),
            'lines_formatted': 2456,
            'changes_made': len(formatting_issues),
            'formatting_issues': formatting_issues,
            'style_violations': style_violations if not options.get('fix_in_place') else [],
            'configuration': {
                'line_length': options.get('line_length', 88),
                'indent_size': options.get('indent_size', 4),
                'use_tabs': options.get('use_tabs', False),
                'trailing_comma': options.get('trailing_comma', True),
                'quote_style': 'double',
                'newline_at_eof': True
            },
            'fixes_applied': {
                'line_length': 12,
                'indentation': 8,
                'trailing_commas': 5,
                'import_sorting': 3,
                'whitespace': 15
            } if options.get('fix_in_place') else {},
            'check_only': options.get('check_only', False),
            'all_files_compliant': len(style_violations) == 0,
            'compliance_rate': 94.5,
            'time_saved': '~30 minutes of manual formatting',
            'next_steps': [
                'Review formatting changes',
                'Commit formatted code',
                'Add formatter to pre-commit hooks',
                'Configure formatter in CI/CD',
                'Update team style guide',
                'Run formatter regularly'
            ]
        }

    def validate_params(self, params: Dict[str, Any]) -> bool:
        """Validate code formatting parameters."""
        if 'target_path' not in params:
            self.logger.error("Missing required field: target_path")
            return False

        valid_languages = ['python', 'javascript', 'typescript', 'go', 'rust']
        language = params.get('language', 'python')

        if language not in valid_languages:
            self.logger.error(f"Unsupported language: {language}")
            return False

        return True

    def _get_default_formatter(self, language: str) -> str:
        """Get default formatter for language."""
        formatters = {
            'python': 'black',
            'javascript': 'prettier',
            'typescript': 'prettier',
            'go': 'gofmt',
            'rust': 'rustfmt'
        }
        return formatters.get(language, 'black')
