"""Configuration management for Mem0 Interface POC."""

import os
from typing import List, Optional
from pydantic import Field
from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    """Application settings loaded from environment variables."""
    
    # API Configuration
    openai_api_key: str = Field(..., env="OPENAI_API_KEY")
    openai_base_url: str = Field(..., env="OPENAI_BASE_URL")
    embedder_api_key: str = Field(..., env="EMBEDDER_API_KEY")
    
    # Database Configuration
    postgres_host: str = Field("localhost", env="POSTGRES_HOST")
    postgres_port: int = Field(5432, env="POSTGRES_PORT")
    postgres_db: str = Field("mem0_db", env="POSTGRES_DB")
    postgres_user: str = Field("mem0_user", env="POSTGRES_USER")
    postgres_password: str = Field("mem0_password", env="POSTGRES_PASSWORD")
    
    # Neo4j Configuration
    neo4j_uri: str = Field("bolt://localhost:7687", env="NEO4J_URI")
    neo4j_username: str = Field("neo4j", env="NEO4J_USERNAME")
    neo4j_password: str = Field("mem0_neo4j_password", env="NEO4J_PASSWORD")
    
    # Application Configuration
    log_level: str = Field("INFO", env="LOG_LEVEL")
    cors_origins: str = Field("http://localhost:3000", env="CORS_ORIGINS")
    
    # Model Configuration - Ultra-minimal (single model)
    default_model: str = Field("claude-sonnet-4", env="DEFAULT_MODEL")
    
    @property
    def postgres_url(self) -> str:
        """Build PostgreSQL connection URL."""
        return f"postgresql://{self.postgres_user}:{self.postgres_password}@{self.postgres_host}:{self.postgres_port}/{self.postgres_db}"
    
    @property
    def cors_origins_list(self) -> List[str]:
        """Convert CORS origins string to list."""
        return [origin.strip() for origin in self.cors_origins.split(",")]
    
    class Config:
        env_file = ".env"
        case_sensitive = False


# Global settings instance
settings = Settings()