"""
Authentication Generator Agent

Generates authentication code including OAuth, JWT, session-based auth,
and integration with various identity providers.
"""

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


class AuthenticationGeneratorAgent(BaseAgent):
    """
    Generates authentication implementation.

    Supports:
    - JWT authentication
    - OAuth 2.0 / OAuth 2.1
    - Session-based auth
    - Social login (Google, GitHub, etc.)
    - Multi-factor authentication
    - Password reset flows
    """

    def __init__(self):
        super().__init__(
            name='authentication-generator',
            description='Generate authentication code (OAuth, JWT, sessions)',
            category='engineering',
            version='1.0.0',
            tags=['authentication', 'security', 'oauth', 'jwt', 'auth']
        )

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

        Args:
            params: {
                'auth_type': 'jwt|oauth|session|social|all',
                'language': 'python|javascript|typescript|go|rust',
                'framework': 'fastapi|express|django|gin',
                'providers': List[str],  # OAuth providers (google, github, etc.)
                'options': {
                    'refresh_tokens': bool,
                    'mfa': bool,
                    'password_reset': bool,
                    'email_verification': bool,
                    'rate_limiting': bool
                }
            }

        Returns:
            {
                'status': 'success|failed',
                'auth_components': List[Dict],
                'routes_generated': List[str],
                'middleware_generated': List[str],
                'files_generated': List[str],
                'providers_configured': List[str]
            }
        """
        auth_type = params.get('auth_type', 'jwt')
        language = params.get('language', 'python')
        framework = params.get('framework', 'fastapi')
        providers = params.get('providers', [])
        options = params.get('options', {})

        self.logger.info(
            f"Generating {auth_type} authentication for {framework}"
        )

        # Mock authentication generation
        auth_components = [
            {
                'name': 'User Registration',
                'endpoint': '/api/auth/register',
                'method': 'POST',
                'features': ['email_validation', 'password_hashing', 'email_verification']
            },
            {
                'name': 'User Login',
                'endpoint': '/api/auth/login',
                'method': 'POST',
                'features': ['credential_validation', 'token_generation']
            },
            {
                'name': 'Token Refresh',
                'endpoint': '/api/auth/refresh',
                'method': 'POST',
                'features': ['refresh_token_validation', 'new_token_generation']
            } if options.get('refresh_tokens') else None,
            {
                'name': 'Password Reset Request',
                'endpoint': '/api/auth/password-reset',
                'method': 'POST',
                'features': ['email_validation', 'reset_token_generation', 'email_sending']
            } if options.get('password_reset') else None,
            {
                'name': 'MFA Setup',
                'endpoint': '/api/auth/mfa/setup',
                'method': 'POST',
                'features': ['totp_generation', 'qr_code_generation']
            } if options.get('mfa') else None
        ]

        auth_components = [c for c in auth_components if c]  # Remove None values

        oauth_providers = providers or ['google', 'github']
        for provider in oauth_providers:
            auth_components.append({
                'name': f'{provider.capitalize()} OAuth',
                'endpoint': f'/api/auth/{provider}',
                'method': 'GET',
                'features': ['oauth_redirect', 'token_exchange', 'user_creation']
            })

        routes = [
            '/api/auth/register',
            '/api/auth/login',
            '/api/auth/logout',
            '/api/auth/me',
            '/api/auth/refresh',
            '/api/auth/password-reset',
            '/api/auth/verify-email'
        ]

        middleware = [
            'auth_middleware.py',
            'jwt_handler.py',
            'password_hasher.py',
            'token_validator.py',
            'rate_limiter.py'
        ]

        files_generated = [
            'auth/routes.py',
            'auth/models.py',
            'auth/schemas.py',
            'auth/services.py',
            'auth/utils.py',
            'auth/config.py'
        ]

        files_generated.extend([f'auth/middleware/{m}' for m in middleware])

        if oauth_providers:
            files_generated.extend([
                f'auth/providers/{provider}.py'
                for provider in oauth_providers
            ])

        return {
            'status': 'success',
            'auth_type': auth_type,
            'language': language,
            'framework': framework,
            'auth_components': auth_components,
            'total_endpoints': len(auth_components),
            'routes_generated': routes,
            'middleware_generated': middleware,
            'files_generated': files_generated,
            'providers_configured': oauth_providers,
            'features': {
                'jwt_tokens': auth_type in ['jwt', 'all'],
                'refresh_tokens': options.get('refresh_tokens', True),
                'oauth': bool(oauth_providers),
                'mfa': options.get('mfa', False),
                'password_reset': options.get('password_reset', True),
                'email_verification': options.get('email_verification', True),
                'rate_limiting': options.get('rate_limiting', True),
                'password_hashing': True,
                'secure_cookies': True
            },
            'security_features': [
                'Bcrypt password hashing',
                'JWT token signing',
                'Refresh token rotation',
                'CSRF protection',
                'Rate limiting',
                'Account lockout',
                'Password strength validation',
                'Email verification',
                'Secure cookie handling'
            ],
            'token_configuration': {
                'access_token_expiry': '15m',
                'refresh_token_expiry': '7d',
                'algorithm': 'HS256',
                'issuer': 'your-app'
            },
            'database_models': [
                'User',
                'RefreshToken',
                'PasswordResetToken',
                'EmailVerificationToken',
                'MFASecret'
            ],
            'next_steps': [
                'Configure JWT secret keys',
                'Set up OAuth app credentials',
                'Configure email service',
                'Add rate limiting rules',
                'Implement user model',
                'Test authentication flows',
                'Add security headers'
            ]
        }

    def validate_params(self, params: Dict[str, Any]) -> bool:
        """Validate authentication generation parameters."""
        valid_auth_types = ['jwt', 'oauth', 'session', 'social', 'all']
        auth_type = params.get('auth_type', 'jwt')

        if auth_type not in valid_auth_types:
            self.logger.error(f"Invalid auth type: {auth_type}")
            return False

        return True
