"""
SAAP Configuration Settings - Production Ready with OpenRouter Integration
Environment-based configuration management for On-Premise deployment
"""

import os
from pathlib import Path
from typing import Optional, List
from pydantic import Field, field_validator
from pydantic_settings import BaseSettings
from functools import lru_cache
import logging

class DatabaseSettings(BaseSettings):
    """Database configuration settings"""
    
    # Database URL - supports SQLite, PostgreSQL, MySQL
    database_url: str = Field(
        default="sqlite:///./saap_production.db",
        env="DATABASE_URL",
        description="Database connection URL"
    )
    
    # Connection pool settings
    pool_size: int = Field(default=10, env="DB_POOL_SIZE")
    max_overflow: int = Field(default=20, env="DB_MAX_OVERFLOW")
    pool_timeout: int = Field(default=30, env="DB_POOL_TIMEOUT")
    pool_recycle: int = Field(default=3600, env="DB_POOL_RECYCLE")
    
    # SQLite specific
    sqlite_check_same_thread: bool = Field(default=False, env="SQLITE_CHECK_SAME_THREAD")
    
    model_config = {
        "env_file": ".env",
        "env_file_encoding": "utf-8",
        "case_sensitive": False,
        "extra": "allow"  # Allow extra fields
    }
    
    @field_validator('database_url')
    def validate_database_url(cls, v):
        """Ensure database URL is properly formatted"""
        if not v.startswith(('sqlite:///', 'postgresql://', 'mysql://')):
            raise ValueError('Unsupported database type. Use sqlite, postgresql, or mysql.')
        return v

class ColossusSettings(BaseSettings):
    """colossus Server configuration"""
    
    api_base: str = Field(
        default="https://ai.adrian-schupp.de",
        env="COLOSSUS_API_BASE",
        description="colossus server base URL"
    )
    
    api_key: str = Field(
        default="sk-dBoxml3krytIRLdjr35Lnw",
        env="COLOSSUS_API_KEY",
        description="colossus API key"
    )
    
    default_model: str = Field(
        default="mistral-small3.2:24b-instruct-2506",
        env="COLOSSUS_DEFAULT_MODEL"
    )
    
    timeout: int = Field(default=60, env="COLOSSUS_TIMEOUT")
    max_retries: int = Field(default=3, env="COLOSSUS_MAX_RETRIES")
    
    model_config = {
        "env_file": ".env",
        "env_file_encoding": "utf-8",
        "case_sensitive": False,
        "extra": "allow"  # Allow extra fields
    }

class OpenRouterSettings(BaseSettings):
    """OpenRouter API configuration for cost-efficient models"""
    
    # API Configuration
    api_key: str = Field(
        default="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",
        env="OPENROUTER_API_KEY",
        description="OpenRouter API key for cost-efficient LLM access"
    )
    
    base_url: str = Field(
        default="https://openrouter.ai/api/v1",
        env="OPENROUTER_BASE_URL"
    )
    
    enabled: bool = Field(default=True, env="OPENROUTER_ENABLED")
    
    # Cost Optimization Settings
    use_cost_optimization: bool = Field(default=True, env="OPENROUTER_USE_COST_OPTIMIZATION")
    max_cost_per_request: float = Field(default=0.01, env="OPENROUTER_MAX_COST_PER_REQUEST")
    fallback_to_free: bool = Field(default=True, env="OPENROUTER_FALLBACK_TO_FREE")
    
    # Agent-Specific Model Configuration
    jane_model: str = Field(default="openai/gpt-4o-mini", env="JANE_ALESI_MODEL")
    jane_max_tokens: int = Field(default=800, env="JANE_ALESI_MAX_TOKENS")
    jane_temperature: float = Field(default=0.7, env="JANE_ALESI_TEMPERATURE")
    
    john_model: str = Field(default="anthropic/claude-3-haiku", env="JOHN_ALESI_MODEL") 
    john_max_tokens: int = Field(default=1200, env="JOHN_ALESI_MAX_TOKENS")
    john_temperature: float = Field(default=0.5, env="JOHN_ALESI_TEMPERATURE")
    
    lara_model: str = Field(default="openai/gpt-4o-mini", env="LARA_ALESI_MODEL")
    lara_max_tokens: int = Field(default=1000, env="LARA_ALESI_MAX_TOKENS") 
    lara_temperature: float = Field(default=0.3, env="LARA_ALESI_TEMPERATURE")
    
    # Free Model Fallbacks
    fallback_model: str = Field(default="meta-llama/llama-3.2-3b-instruct:free", env="FALLBACK_MODEL")
    analyst_model: str = Field(default="meta-llama/llama-3.2-3b-instruct:free", env="ANALYST_MODEL")
    
    # Cost Tracking
    enable_cost_tracking: bool = Field(default=True, env="ENABLE_COST_TRACKING")
    cost_alert_threshold: float = Field(default=5.0, env="COST_ALERT_THRESHOLD")
    log_performance_metrics: bool = Field(default=True, env="LOG_PERFORMANCE_METRICS")
    save_cost_analytics: bool = Field(default=True, env="SAVE_COST_ANALYTICS")
    
    model_config = {
        "env_file": ".env",
        "env_file_encoding": "utf-8",
        "case_sensitive": False,
        "extra": "allow"
    }
    
    def get_agent_model_config(self, agent_name: str) -> dict:
        """Get model configuration for specific agent"""
        configs = {
            "jane_alesi": {
                "model": self.jane_model,
                "max_tokens": self.jane_max_tokens,
                "temperature": self.jane_temperature,
                "cost_per_1m": 0.15  # GPT-4o-mini
            },
            "john_alesi": {
                "model": self.john_model, 
                "max_tokens": self.john_max_tokens,
                "temperature": self.john_temperature,
                "cost_per_1m": 0.25  # Claude-3-Haiku
            },
            "lara_alesi": {
                "model": self.lara_model,
                "max_tokens": self.lara_max_tokens,
                "temperature": self.lara_temperature,
                "cost_per_1m": 0.15  # GPT-4o-mini
            }
        }
        
        return configs.get(agent_name.lower(), {
            "model": self.fallback_model,
            "max_tokens": 600,
            "temperature": 0.7,
            "cost_per_1m": 0.0  # Free model
        })
    
class RedisSettings(BaseSettings):
    """Redis configuration for message queuing"""
    
    host: str = Field(default="localhost", env="REDIS_HOST")
    port: int = Field(default=6379, env="REDIS_PORT")
    password: Optional[str] = Field(default=None, env="REDIS_PASSWORD")
    database: int = Field(default=0, env="REDIS_DB")
    max_connections: int = Field(default=50, env="REDIS_MAX_CONNECTIONS")

    model_config = {
        "env_file": ".env",
        "env_file_encoding": "utf-8",
        "case_sensitive": False,
        "extra": "allow"  # Allow extra fields
    }

class SecuritySettings(BaseSettings):
    """Security and authentication settings"""
    
    secret_key: str = Field(
        default="saap-development-secret-change-in-production",
        env="SECRET_KEY",
        min_length=32
    )
    
    # JWT Settings
    jwt_algorithm: str = Field(default="HS256", env="JWT_ALGORITHM")
    jwt_expire_minutes: int = Field(default=1440, env="JWT_EXPIRE_MINUTES")  # 24 hours
    
    # API Rate limiting
    rate_limit_requests: int = Field(default=1000, env="RATE_LIMIT_REQUESTS")
    rate_limit_window: int = Field(default=3600, env="RATE_LIMIT_WINDOW")  # 1 hour
    
    # CORS settings - Updated for network access
    allowed_origins: str = Field(
        default="http://localhost:5173,http://localhost:8080,http://localhost:3000,http://100.64.0.45:5173,http://100.64.0.45:8080,http://100.64.0.45:3000,http://100.64.0.45:8000",
        env="ALLOWED_ORIGINS"
    )

    model_config = {
        "env_file": ".env",
        "env_file_encoding": "utf-8",
        "case_sensitive": False,
        "extra": "allow"  # Allow extra fields
    }
    
    @field_validator('allowed_origins')
    def parse_allowed_origins(cls, v):
        """Parse comma-separated origins string into list"""
        if isinstance(v, str):
            return [origin.strip() for origin in v.split(',') if origin.strip()]
        return v
    
    def get_allowed_origins_list(self) -> List[str]:
        """Get allowed origins as a list"""
        if isinstance(self.allowed_origins, str):
            return [origin.strip() for origin in self.allowed_origins.split(',') if origin.strip()]
        return self.allowed_origins

class LoggingSettings(BaseSettings):
    """Enhanced logging configuration with cost tracking"""
    
    log_level: str = Field(default="INFO", env="LOG_LEVEL")
    log_format: str = Field(
        default="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
        env="LOG_FORMAT"
    )
    
    # File logging
    log_to_file: bool = Field(default=True, env="LOG_TO_FILE")
    log_file_path: str = Field(default="logs/saap.log", env="LOG_FILE_PATH")
    log_file_max_size: int = Field(default=10485760, env="LOG_FILE_MAX_SIZE")  # 10MB
    log_file_backup_count: int = Field(default=5, env="LOG_FILE_BACKUP_COUNT")
    
    # Cost & Performance Logging
    log_cost_metrics: bool = Field(default=True, env="LOG_COST_METRICS")
    cost_log_path: str = Field(default="logs/saap_costs.log", env="COST_LOG_PATH")
    performance_log_path: str = Field(default="logs/saap_performance.log", env="PERFORMANCE_LOG_PATH")

    model_config = {
        "env_file": ".env",
        "env_file_encoding": "utf-8",
        "case_sensitive": False,
        "extra": "allow"  # Allow extra fields
    }

class AgentSettings(BaseSettings):
    """Enhanced agent-specific configuration with multi-provider support"""
    
    default_agent_timeout: int = Field(default=60, env="DEFAULT_AGENT_TIMEOUT")
    max_concurrent_agents: int = Field(default=10, env="MAX_CONCURRENT_AGENTS")
    agent_health_check_interval: int = Field(default=300, env="AGENT_HEALTH_CHECK_INTERVAL")  # 5 minutes
    
    # Performance settings
    max_message_history: int = Field(default=1000, env="MAX_MESSAGE_HISTORY")
    cleanup_old_messages_days: int = Field(default=30, env="CLEANUP_OLD_MESSAGES_DAYS")
    
    # Multi-Provider Strategy
    primary_provider: str = Field(default="colossus", env="PRIMARY_PROVIDER")  # colossus, openrouter
    fallback_provider: str = Field(default="openrouter", env="FALLBACK_PROVIDER")
    auto_fallback_on_error: bool = Field(default=True, env="AUTO_FALLBACK_ON_ERROR")
    fallback_timeout_threshold: int = Field(default=30, env="FALLBACK_TIMEOUT_THRESHOLD")  # seconds
    
    # Cost Efficiency Targets
    target_response_time: float = Field(default=2.0, env="TARGET_RESPONSE_TIME")  # seconds
    target_cost_per_request: float = Field(default=0.002, env="TARGET_COST_PER_REQUEST")  # $0.002
    cost_vs_speed_priority: str = Field(default="balanced", env="COST_VS_SPEED_PRIORITY")  # cost, speed, balanced
    
    # Daily Cost Budgets
    daily_cost_budget: float = Field(default=10.0, env="DAILY_COST_BUDGET")  # $10/day
    agent_cost_budget: float = Field(default=2.0, env="AGENT_COST_BUDGET")  # $2/agent/day
    warning_cost_threshold: float = Field(default=0.80, env="WARNING_COST_THRESHOLD")  # 80%
    
    # Model Selection Strategy
    use_free_models_first: bool = Field(default=False, env="USE_FREE_MODELS_FIRST")
    smart_model_selection: bool = Field(default=True, env="SMART_MODEL_SELECTION")
    cost_learning_enabled: bool = Field(default=True, env="COST_LEARNING_ENABLED")

    model_config = {
        "env_file": ".env",
        "env_file_encoding": "utf-8",
        "case_sensitive": False,
        "extra": "allow"  # Allow extra fields
    }
    
    @field_validator('primary_provider', 'fallback_provider')
    def validate_provider(cls, v):
        """Validate provider names"""
        allowed = ['colossus', 'openrouter']
        if v not in allowed:
            raise ValueError(f'Provider must be one of: {allowed}')
        return v
        
    @field_validator('cost_vs_speed_priority')  
    def validate_priority(cls, v):
        """Validate priority setting"""
        allowed = ['cost', 'speed', 'balanced']
        if v not in allowed:
            raise ValueError(f'Priority must be one of: {allowed}')
        return v

class SaapSettings(BaseSettings):
    """Main SAAP Application Settings with OpenRouter Integration"""
    
    # Application Info
    app_name: str = Field(default="SAAP - satware AI Autonomous Agent Platform", env="APP_NAME")
    app_version: str = Field(default="1.0.0", env="APP_VERSION")
    environment: str = Field(default="production", env="ENVIRONMENT")
    debug: bool = Field(default=False, env="DEBUG")
    
    # Server settings - Updated for network access
    host: str = Field(default="100.64.0.45", env="HOST")  # 🌐 Changed from 0.0.0.0
    port: int = Field(default=8000, env="PORT")
    reload: bool = Field(default=False, env="RELOAD")
    
    # Component Settings
    database: DatabaseSettings = DatabaseSettings()
    colossus: ColossusSettings = ColossusSettings()
    openrouter: OpenRouterSettings = OpenRouterSettings()  # NEW!
    redis: RedisSettings = RedisSettings()
    security: SecuritySettings = SecuritySettings()
    logging: LoggingSettings = LoggingSettings()
    agents: AgentSettings = AgentSettings()
    
    model_config = {
        "env_file": ".env",
        "env_file_encoding": "utf-8",
        "case_sensitive": False,
        "extra": "allow"  # Allow extra fields from .env that aren't explicitly defined
    }
        
    @field_validator('environment')
    def validate_environment(cls, v):
        """Validate environment setting"""
        allowed_envs = ['development', 'staging', 'production', 'testing']
        if v.lower() not in allowed_envs:
            raise ValueError(f'Environment must be one of: {allowed_envs}')
        return v.lower()
    
    def get_database_url(self) -> str:
        """Get database URL with environment-specific adjustments"""
        if self.environment == 'testing':
            return "sqlite:///./test_saap.db"
        elif self.environment == 'development':
            return "sqlite:///./saap_dev.db"
        else:
            return self.database.database_url
    
    def is_production(self) -> bool:
        """Check if running in production"""
        return self.environment == 'production'
    
    def get_cors_origins(self) -> List[str]:
        """Get CORS allowed origins as list"""
        return self.security.get_allowed_origins_list()
    
    def get_log_config(self) -> dict:
        """Get logging configuration for uvicorn/fastapi"""
        return {
            "version": 1,
            "disable_existing_loggers": False,
            "formatters": {
                "default": {
                    "format": self.logging.log_format,
                },
                "cost": {
                    "format": "%(asctime)s - COST - %(message)s",
                },
                "performance": {
                    "format": "%(asctime)s - PERF - %(message)s",
                }
            },
            "handlers": {
                "default": {
                    "formatter": "default",
                    "class": "logging.StreamHandler",
                    "stream": "ext://sys.stdout",
                },
                "file": {
                    "formatter": "default",
                    "class": "logging.handlers.RotatingFileHandler",
                    "filename": self.logging.log_file_path,
                    "maxBytes": self.logging.log_file_max_size,
                    "backupCount": self.logging.log_file_backup_count,
                } if self.logging.log_to_file else None,
                "cost_file": {
                    "formatter": "cost", 
                    "class": "logging.handlers.RotatingFileHandler",
                    "filename": self.logging.cost_log_path,
                    "maxBytes": self.logging.log_file_max_size,
                    "backupCount": self.logging.log_file_backup_count,
                } if self.logging.log_cost_metrics else None,
                "performance_file": {
                    "formatter": "performance",
                    "class": "logging.handlers.RotatingFileHandler", 
                    "filename": self.logging.performance_log_path,
                    "maxBytes": self.logging.log_file_max_size,
                    "backupCount": self.logging.log_file_backup_count,
                } if self.logging.log_cost_metrics else None
            },
            "loggers": {
                "": {
                    "handlers": [h for h in ["default", "file"] if h],
                    "level": self.logging.log_level,
                },
                "saap.cost": {
                    "handlers": [h for h in ["cost_file"] if h],
                    "level": "INFO",
                    "propagate": False,
                },
                "saap.performance": {
                    "handlers": [h for h in ["performance_file"] if h], 
                    "level": "INFO",
                    "propagate": False,
                }
            },
        }
        
    def get_openrouter_config_for_agent(self, agent_name: str) -> dict:
        """Get OpenRouter configuration for specific agent"""
        return self.openrouter.get_agent_model_config(agent_name)

@lru_cache()
def get_settings() -> SaapSettings:
    """Get cached settings instance"""
    return SaapSettings()

# Global settings instance
settings = get_settings()

# Create logs directory if needed
if settings.logging.log_to_file:
    Path(settings.logging.log_file_path).parent.mkdir(parents=True, exist_ok=True)
if settings.logging.log_cost_metrics:
    Path(settings.logging.cost_log_path).parent.mkdir(parents=True, exist_ok=True)
    Path(settings.logging.performance_log_path).parent.mkdir(parents=True, exist_ok=True)

# Environment-specific logging setup
def setup_logging():
    """Setup logging configuration"""
    import logging.config
    
    log_config = settings.get_log_config()
    logging.config.dictConfig(log_config)
    
    logger = logging.getLogger(__name__)
    
    logger.info(f"🚀 SAAP Configuration loaded:")
    logger.info(f"   Environment: {settings.environment}")
    logger.info(f"   Database: {settings.get_database_url()}")
    logger.info(f"   colossus: {settings.colossus.api_base}")
    logger.info(f"   OpenRouter: {settings.openrouter.enabled}")
    logger.info(f"   Redis: {settings.redis.host}:{settings.redis.port}")
    logger.info(f"   Debug Mode: {settings.debug}")
    logger.info(f"🌐 Server Host: {settings.host}:{settings.port}")  # Log the network settings
    logger.info(f"🔒 CORS Origins: {settings.get_cors_origins()}")
    
    # Cost tracking logger
    if settings.logging.log_cost_metrics:
        cost_logger = logging.getLogger("saap.cost")
        cost_logger.info("💰 Cost tracking initialized")
        
        performance_logger = logging.getLogger("saap.performance")
        performance_logger.info("📊 Performance monitoring initialized")

if __name__ == "__main__":
    # Test configuration
    setup_logging()
    logger = logging.getLogger(__name__)
    
    logger.info("🧪 Configuration Test:")
    logger.info(f"   App Name: {settings.app_name}")
    logger.info(f"   Database URL: {settings.get_database_url()}")
    logger.info(f"   Production Mode: {settings.is_production()}")
    logger.info(f"   OpenRouter Enabled: {settings.openrouter.enabled}")
    logger.info(f"🌐 Network Settings:")
    logger.info(f"   Host: {settings.host}")
    logger.info(f"   Port: {settings.port}")
    logger.info(f"   CORS Origins: {settings.get_cors_origins()}")
    
    # Test agent model configs
    for agent in ['jane_alesi', 'john_alesi', 'lara_alesi']:
        config = settings.get_openrouter_config_for_agent(agent)
        logger.info(f"   {agent}: {config['model']} (${config['cost_per_1m']}/1M tokens)")