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664
"""Configuration Application Service for settings management."""

import logging
import os
import json
from typing import Dict, List, Any, Optional, Union
from pathlib import Path
from dataclasses import asdict

from ..error_handling.error_mapper import ErrorMapper
from ..error_handling.structured_logger import StructuredLogger, LogContext, get_structured_logger
from ...infrastructure.config.app_config import AppConfig, TTSConfig, STTConfig, TranslationConfig, ProcessingConfig, LoggingConfig
from ...infrastructure.config.dependency_container import DependencyContainer
from ...domain.exceptions import DomainException

logger = get_structured_logger(__name__)


class ConfigurationException(DomainException):
    """Exception raised for configuration-related errors."""
    pass


class ConfigurationApplicationService:
    """Application service for managing application configuration and settings."""

    def __init__(
        self,
        container: DependencyContainer,
        config: Optional[AppConfig] = None
    ):
        """
        Initialize the configuration application service.

        Args:
            container: Dependency injection container
            config: Application configuration (optional, will be resolved from container)
        """
        self._container = container
        self._config = config or container.resolve(AppConfig)

        # Initialize error handling
        self._error_mapper = ErrorMapper()

        logger.info("ConfigurationApplicationService initialized")

    def get_current_configuration(self) -> Dict[str, Any]:
        """
        Get the current application configuration.

        Returns:
            Dict[str, Any]: Current configuration as dictionary
        """
        try:
            return {
                'tts': self._config.get_tts_config(),
                'stt': self._config.get_stt_config(),
                'translation': self._config.get_translation_config(),
                'processing': self._config.get_processing_config(),
                'logging': self._config.get_logging_config()
            }
        except Exception as e:
            logger.error(f"Failed to get current configuration: {e}")
            raise ConfigurationException(f"Failed to retrieve configuration: {str(e)}")

    def get_tts_configuration(self) -> Dict[str, Any]:
        """
        Get TTS-specific configuration.

        Returns:
            Dict[str, Any]: TTS configuration
        """
        try:
            return self._config.get_tts_config()
        except Exception as e:
            logger.error(f"Failed to get TTS configuration: {e}")
            raise ConfigurationException(f"Failed to retrieve TTS configuration: {str(e)}")

    def get_stt_configuration(self) -> Dict[str, Any]:
        """
        Get STT-specific configuration.

        Returns:
            Dict[str, Any]: STT configuration
        """
        try:
            return self._config.get_stt_config()
        except Exception as e:
            logger.error(f"Failed to get STT configuration: {e}")
            raise ConfigurationException(f"Failed to retrieve STT configuration: {str(e)}")

    def get_translation_configuration(self) -> Dict[str, Any]:
        """
        Get translation-specific configuration.

        Returns:
            Dict[str, Any]: Translation configuration
        """
        try:
            return self._config.get_translation_config()
        except Exception as e:
            logger.error(f"Failed to get translation configuration: {e}")
            raise ConfigurationException(f"Failed to retrieve translation configuration: {str(e)}")

    def get_processing_configuration(self) -> Dict[str, Any]:
        """
        Get processing-specific configuration.

        Returns:
            Dict[str, Any]: Processing configuration
        """
        try:
            return self._config.get_processing_config()
        except Exception as e:
            logger.error(f"Failed to get processing configuration: {e}")
            raise ConfigurationException(f"Failed to retrieve processing configuration: {str(e)}")

    def get_logging_configuration(self) -> Dict[str, Any]:
        """
        Get logging-specific configuration.

        Returns:
            Dict[str, Any]: Logging configuration
        """
        try:
            return self._config.get_logging_config()
        except Exception as e:
            logger.error(f"Failed to get logging configuration: {e}")
            raise ConfigurationException(f"Failed to retrieve logging configuration: {str(e)}")

    def update_tts_configuration(self, updates: Dict[str, Any]) -> Dict[str, Any]:
        """
        Update TTS configuration.

        Args:
            updates: Configuration updates to apply

        Returns:
            Dict[str, Any]: Updated TTS configuration

        Raises:
            ConfigurationException: If update fails or validation fails
        """
        try:
            # Validate updates
            self._validate_tts_updates(updates)

            # Apply updates to current config
            current_config = self._config.get_tts_config()

            for key, value in updates.items():
                if key in current_config:
                    # Update the actual config object
                    if hasattr(self._config.tts, key):
                        setattr(self._config.tts, key, value)
                        logger.info(f"Updated TTS config: {key} = {value}")
                else:
                    logger.warning(f"Unknown TTS configuration key: {key}")

            # Return updated configuration
            updated_config = self._config.get_tts_config()
            logger.info(f"TTS configuration updated: {list(updates.keys())}")

            return updated_config

        except Exception as e:
            logger.error(f"Failed to update TTS configuration: {e}")
            raise ConfigurationException(f"Failed to update TTS configuration: {str(e)}")

    def update_stt_configuration(self, updates: Dict[str, Any]) -> Dict[str, Any]:
        """
        Update STT configuration.

        Args:
            updates: Configuration updates to apply

        Returns:
            Dict[str, Any]: Updated STT configuration

        Raises:
            ConfigurationException: If update fails or validation fails
        """
        try:
            # Validate updates
            self._validate_stt_updates(updates)

            # Apply updates to current config
            current_config = self._config.get_stt_config()

            for key, value in updates.items():
                if key in current_config:
                    # Update the actual config object
                    if hasattr(self._config.stt, key):
                        setattr(self._config.stt, key, value)
                        logger.info(f"Updated STT config: {key} = {value}")
                else:
                    logger.warning(f"Unknown STT configuration key: {key}")

            # Return updated configuration
            updated_config = self._config.get_stt_config()
            logger.info(f"STT configuration updated: {list(updates.keys())}")

            return updated_config

        except Exception as e:
            logger.error(f"Failed to update STT configuration: {e}")
            raise ConfigurationException(f"Failed to update STT configuration: {str(e)}")

    def update_translation_configuration(self, updates: Dict[str, Any]) -> Dict[str, Any]:
        """
        Update translation configuration.

        Args:
            updates: Configuration updates to apply

        Returns:
            Dict[str, Any]: Updated translation configuration

        Raises:
            ConfigurationException: If update fails or validation fails
        """
        try:
            # Validate updates
            self._validate_translation_updates(updates)

            # Apply updates to current config
            current_config = self._config.get_translation_config()

            for key, value in updates.items():
                if key in current_config:
                    # Update the actual config object
                    if hasattr(self._config.translation, key):
                        setattr(self._config.translation, key, value)
                        logger.info(f"Updated translation config: {key} = {value}")
                else:
                    logger.warning(f"Unknown translation configuration key: {key}")

            # Return updated configuration
            updated_config = self._config.get_translation_config()
            logger.info(f"Translation configuration updated: {list(updates.keys())}")

            return updated_config

        except Exception as e:
            logger.error(f"Failed to update translation configuration: {e}")
            raise ConfigurationException(f"Failed to update translation configuration: {str(e)}")

    def update_processing_configuration(self, updates: Dict[str, Any]) -> Dict[str, Any]:
        """
        Update processing configuration.

        Args:
            updates: Configuration updates to apply

        Returns:
            Dict[str, Any]: Updated processing configuration

        Raises:
            ConfigurationException: If update fails or validation fails
        """
        try:
            # Validate updates
            self._validate_processing_updates(updates)

            # Apply updates to current config
            current_config = self._config.get_processing_config()

            for key, value in updates.items():
                if key in current_config:
                    # Update the actual config object
                    if hasattr(self._config.processing, key):
                        setattr(self._config.processing, key, value)
                        logger.info(f"Updated processing config: {key} = {value}")
                else:
                    logger.warning(f"Unknown processing configuration key: {key}")

            # Return updated configuration
            updated_config = self._config.get_processing_config()
            logger.info(f"Processing configuration updated: {list(updates.keys())}")

            return updated_config

        except Exception as e:
            logger.error(f"Failed to update processing configuration: {e}")
            raise ConfigurationException(f"Failed to update processing configuration: {str(e)}")

    def _validate_tts_updates(self, updates: Dict[str, Any]) -> None:
        """
        Validate TTS configuration updates.

        Args:
            updates: Updates to validate

        Raises:
            ConfigurationException: If validation fails
        """
        valid_providers = ['chatterbox', 'dummy']
        valid_languages = ['en', 'es', 'fr', 'de', 'it', 'pt', 'ru', 'ja', 'ko', 'zh']

        for key, value in updates.items():
            if key == 'preferred_providers':
                if not isinstance(value, list):
                    raise ConfigurationException("preferred_providers must be a list")
                for provider in value:
                    if provider not in valid_providers:
                        raise ConfigurationException(f"Invalid TTS provider: {provider}")

            elif key == 'default_speed':
                if not isinstance(value, (int, float)) or not (0.1 <= value <= 3.0):
                    raise ConfigurationException("default_speed must be between 0.1 and 3.0")

            elif key == 'default_language':
                if value not in valid_languages:
                    raise ConfigurationException(f"Invalid language: {value}")

            elif key == 'enable_streaming':
                if not isinstance(value, bool):
                    raise ConfigurationException("enable_streaming must be a boolean")

            elif key == 'max_text_length':
                if not isinstance(value, int) or value <= 0:
                    raise ConfigurationException("max_text_length must be a positive integer")

    def _validate_stt_updates(self, updates: Dict[str, Any]) -> None:
        """
        Validate STT configuration updates.

        Args:
            updates: Updates to validate

        Raises:
            ConfigurationException: If validation fails
        """
        valid_providers = ['whisper', 'parakeet']

        for key, value in updates.items():
            if key == 'preferred_providers':
                if not isinstance(value, list):
                    raise ConfigurationException("preferred_providers must be a list")
                for provider in value:
                    if provider not in valid_providers:
                        raise ConfigurationException(f"Invalid STT provider: {provider}")

            elif key == 'default_model':
                if value not in valid_providers:
                    raise ConfigurationException(f"Invalid STT model: {value}")

            elif key == 'chunk_length_s':
                if not isinstance(value, int) or value <= 0:
                    raise ConfigurationException("chunk_length_s must be a positive integer")

            elif key == 'batch_size':
                if not isinstance(value, int) or value <= 0:
                    raise ConfigurationException("batch_size must be a positive integer")

            elif key == 'enable_vad':
                if not isinstance(value, bool):
                    raise ConfigurationException("enable_vad must be a boolean")

    def _validate_translation_updates(self, updates: Dict[str, Any]) -> None:
        """
        Validate translation configuration updates.

        Args:
            updates: Updates to validate

        Raises:
            ConfigurationException: If validation fails
        """
        for key, value in updates.items():
            if key == 'default_provider':
                if not isinstance(value, str) or not value:
                    raise ConfigurationException("default_provider must be a non-empty string")

            elif key == 'model_name':
                if not isinstance(value, str) or not value:
                    raise ConfigurationException("model_name must be a non-empty string")

            elif key == 'max_chunk_length':
                if not isinstance(value, int) or value <= 0:
                    raise ConfigurationException("max_chunk_length must be a positive integer")

            elif key == 'batch_size':
                if not isinstance(value, int) or value <= 0:
                    raise ConfigurationException("batch_size must be a positive integer")

            elif key == 'cache_translations':
                if not isinstance(value, bool):
                    raise ConfigurationException("cache_translations must be a boolean")

    def _validate_processing_updates(self, updates: Dict[str, Any]) -> None:
        """
        Validate processing configuration updates.

        Args:
            updates: Updates to validate

        Raises:
            ConfigurationException: If validation fails
        """
        for key, value in updates.items():
            if key == 'temp_dir':
                if not isinstance(value, str) or not value:
                    raise ConfigurationException("temp_dir must be a non-empty string")
                # Try to create directory to validate path
                try:
                    Path(value).mkdir(parents=True, exist_ok=True)
                except Exception as e:
                    raise ConfigurationException(f"Invalid temp_dir path: {e}")

            elif key == 'cleanup_temp_files':
                if not isinstance(value, bool):
                    raise ConfigurationException("cleanup_temp_files must be a boolean")

            elif key == 'max_file_size_mb':
                if not isinstance(value, int) or value <= 0:
                    raise ConfigurationException("max_file_size_mb must be a positive integer")

            elif key == 'supported_audio_formats':
                if not isinstance(value, list):
                    raise ConfigurationException("supported_audio_formats must be a list")
                valid_formats = ['wav', 'mp3', 'flac', 'ogg', 'm4a']
                for fmt in value:
                    if fmt not in valid_formats:
                        raise ConfigurationException(f"Invalid audio format: {fmt}")

            elif key == 'processing_timeout_seconds':
                if not isinstance(value, int) or value <= 0:
                    raise ConfigurationException("processing_timeout_seconds must be a positive integer")

    def save_configuration_to_file(self, file_path: str) -> None:
        """
        Save current configuration to file.

        Args:
            file_path: Path to save configuration file

        Raises:
            ConfigurationException: If save fails
        """
        try:
            self._config.save_configuration(file_path)
            logger.info(f"Configuration saved to {file_path}")
        except Exception as e:
            logger.error(f"Failed to save configuration to {file_path}: {e}")
            raise ConfigurationException(f"Failed to save configuration: {str(e)}")

    def load_configuration_from_file(self, file_path: str) -> Dict[str, Any]:
        """
        Load configuration from file.

        Args:
            file_path: Path to configuration file

        Returns:
            Dict[str, Any]: Loaded configuration

        Raises:
            ConfigurationException: If load fails
        """
        try:
            if not os.path.exists(file_path):
                raise ConfigurationException(f"Configuration file not found: {file_path}")

            # Create new config instance with the file
            new_config = AppConfig(config_file=file_path)

            # Update current config
            self._config = new_config

            # Update container with new config
            self._container.register_singleton(AppConfig, new_config)

            logger.info(f"Configuration loaded from {file_path}")

            return self.get_current_configuration()

        except Exception as e:
            logger.error(f"Failed to load configuration from {file_path}: {e}")
            raise ConfigurationException(f"Failed to load configuration: {str(e)}")

    def reload_configuration(self) -> Dict[str, Any]:
        """
        Reload configuration from original sources.

        Returns:
            Dict[str, Any]: Reloaded configuration

        Raises:
            ConfigurationException: If reload fails
        """
        try:
            self._config.reload_configuration()
            logger.info("Configuration reloaded successfully")

            return self.get_current_configuration()

        except Exception as e:
            logger.error(f"Failed to reload configuration: {e}")
            raise ConfigurationException(f"Failed to reload configuration: {str(e)}")

    def get_provider_availability(self) -> Dict[str, Dict[str, bool]]:
        """
        Get availability status of all providers.

        Returns:
            Dict[str, Dict[str, bool]]: Provider availability by category
        """
        try:
            availability = {
                'tts': {},
                'stt': {},
                'translation': {}
            }

            # Check TTS providers
            tts_factory = self._container.resolve(type(self._container._get_tts_factory()))
            for provider in ['chatterbox', 'dummy']:
                try:
                    tts_factory.create_provider(provider)
                    availability['tts'][provider] = True
                except Exception:
                    availability['tts'][provider] = False

            # Check STT providers
            stt_factory = self._container.resolve(type(self._container._get_stt_factory()))
            for provider in ['whisper', 'parakeet']:
                try:
                    stt_factory.create_provider(provider)
                    availability['stt'][provider] = True
                except Exception:
                    availability['stt'][provider] = False

            # Check translation providers
            translation_factory = self._container.resolve(type(self._container._get_translation_factory()))
            try:
                translation_factory.get_default_provider()
                availability['translation']['nllb'] = True
            except Exception:
                availability['translation']['nllb'] = False

            return availability

        except Exception as e:
            logger.error(f"Failed to check provider availability: {e}")
            raise ConfigurationException(f"Failed to check provider availability: {str(e)}")

    def get_system_info(self) -> Dict[str, Any]:
        """
        Get system information and configuration summary.

        Returns:
            Dict[str, Any]: System information
        """
        try:
            return {
                'config_file': self._config.config_file,
                'temp_directory': self._config.processing.temp_dir,
                'log_level': self._config.logging.level,
                'provider_availability': self.get_provider_availability(),
                'supported_languages': [
                    'en', 'es', 'fr', 'de', 'it', 'pt', 'ru', 'ja', 'ko', 'zh',
                    'ar', 'hi', 'tr', 'pl', 'nl', 'sv', 'da', 'no', 'fi'
                ],
                'supported_audio_formats': self._config.processing.supported_audio_formats,
                'max_file_size_mb': self._config.processing.max_file_size_mb,
                'processing_timeout_seconds': self._config.processing.processing_timeout_seconds
            }
        except Exception as e:
            logger.error(f"Failed to get system info: {e}")
            raise ConfigurationException(f"Failed to get system info: {str(e)}")

    def validate_configuration(self) -> Dict[str, List[str]]:
        """
        Validate current configuration and return any issues.

        Returns:
            Dict[str, List[str]]: Validation issues by category
        """
        issues = {
            'tts': [],
            'stt': [],
            'translation': [],
            'processing': [],
            'logging': []
        }

        try:
            # Validate TTS configuration
            tts_config = self._config.get_tts_config()
            if not (0.1 <= tts_config['default_speed'] <= 3.0):
                issues['tts'].append(f"Invalid default_speed: {tts_config['default_speed']}")

            if tts_config['max_text_length'] <= 0:
                issues['tts'].append(f"Invalid max_text_length: {tts_config['max_text_length']}")

            # Validate STT configuration
            stt_config = self._config.get_stt_config()
            if stt_config['chunk_length_s'] <= 0:
                issues['stt'].append(f"Invalid chunk_length_s: {stt_config['chunk_length_s']}")

            if stt_config['batch_size'] <= 0:
                issues['stt'].append(f"Invalid batch_size: {stt_config['batch_size']}")

            # Validate processing configuration
            processing_config = self._config.get_processing_config()
            if not os.path.exists(processing_config['temp_dir']):
                issues['processing'].append(f"Temp directory does not exist: {processing_config['temp_dir']}")

            if processing_config['max_file_size_mb'] <= 0:
                issues['processing'].append(f"Invalid max_file_size_mb: {processing_config['max_file_size_mb']}")

            # Validate logging configuration
            logging_config = self._config.get_logging_config()
            valid_levels = ['DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL']
            if logging_config['level'].upper() not in valid_levels:
                issues['logging'].append(f"Invalid log level: {logging_config['level']}")

        except Exception as e:
            issues['general'] = [f"Configuration validation error: {str(e)}"]

        return issues

    def reset_to_defaults(self) -> Dict[str, Any]:
        """
        Reset configuration to default values.

        Returns:
            Dict[str, Any]: Reset configuration

        Raises:
            ConfigurationException: If reset fails
        """
        try:
            # Create new config with defaults
            default_config = AppConfig()

            # Update current config
            self._config = default_config

            # Update container with new config
            self._container.register_singleton(AppConfig, default_config)

            logger.info("Configuration reset to defaults")

            return self.get_current_configuration()

        except Exception as e:
            logger.error(f"Failed to reset configuration: {e}")
            raise ConfigurationException(f"Failed to reset configuration: {str(e)}")

    def cleanup(self) -> None:
        """Cleanup configuration service resources."""
        logger.info("Cleaning up ConfigurationApplicationService")
        # No specific cleanup needed for configuration service
        logger.info("ConfigurationApplicationService cleanup completed")

    def __enter__(self):
        """Context manager entry."""
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        """Context manager exit with cleanup."""
        self.cleanup()