"""
SAMMS Enterprise Sovereign Operating System - Core Configuration
SESOS v6 OMEGA CONSTRAINED
"""
from pydantic_settings import BaseSettings
from typing import List, Optional, Dict, Any
from functools import lru_cache
import os


class Settings(BaseSettings):
    """Application settings with environment variable support"""
    
    # Application
    APP_NAME: str = "SAMMS Enterprise Sovereign Operating System"
    APP_VERSION: str = "6.0.0"
    DEBUG: bool = True
    ENVIRONMENT: str = "development"
    
    # API Configuration
    API_V1_PREFIX: str = "/api/v1"
    API_TITLE: str = "SAMMS Enterprise API"
    API_DESCRIPTION: str = "Enterprise Sovereign Operating System API"
    
    # Database
    DATABASE_URL: str = "postgresql://postgres:postgres@localhost:5432/samms_enterprise"
    DATABASE_POOL_SIZE: int = 20
    DATABASE_MAX_OVERFLOW: int = 10
    DATABASE_POOL_RECYCLE: int = 3600
    
    # Redis
    REDIS_URL: str = "redis://localhost:6379/0"
    REDIS_CACHE_DB: int = 1
    REDIS_EVENT_DB: int = 2
    
    # Security
    SECRET_KEY: str = "samms-enterprise-secret-key-change-in-production"
    ALGORITHM: str = "HS256"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
    REFRESH_TOKEN_EXPIRE_DAYS: int = 7
    
    # CORS
    CORS_ORIGINS: List[str] = ["http://localhost:3000", "http://localhost:8000"]
    CORS_ALLOW_CREDENTIALS: bool = True
    CORS_ALLOW_METHODS: List[str] = ["*"]
    CORS_ALLOW_HEADERS: List[str] = ["*"]
    
    # JWT
    JWT_SECRET_KEY: str = "jwt-secret-key-change-in-production"
    JWT_ALGORITHM: str = "HS256"
    JWT_ACCESS_TOKEN_EXPIRE: int = 3600
    JWT_REFRESH_TOKEN_EXPIRE: int = 604800
    
    # Email
    SMTP_HOST: str = "smtp.example.com"
    SMTP_PORT: int = 587
    SMTP_USER: str = ""
    SMTP_PASSWORD: str = ""
    SMTP_FROM: str = "noreply@samms-enterprise.com"
    
    # File Storage
    UPLOAD_DIR: str = "/tmp/samms_uploads"
    MAX_UPLOAD_SIZE: int = 10485760  # 10MB
    
    # AI/ML
    AI_MODEL_PATH: str = "/models"
    AI_ENABLED: bool = True
    AI_CONFIDENCE_THRESHOLD: float = 0.85
    
    # Localization
    DEFAULT_LANGUAGE: str = "en"
    DEFAULT_CURRENCY: str = "USD"
    DEFAULT_TIMEZONE: str = "UTC"
    SUPPORTED_LANGUAGES: List[str] = ["en", "es", "fr", "de", "zh", "ja", "pt", "ar"]
    SUPPORTED_CURRENCIES: List[str] = ["USD", "EUR", "GBP", "JPY", "CNY", "CAD", "AUD", "CHF"]
    
    # Feature Flags
    FEATURE_ANALYTICS: bool = True
    FEATURE_AI_COPILOT: bool = True
    FEATURE_WORKFLOW_BUILDER: bool = True