"""
Configuration management for B2B Shopping AI Assistant
"""
from typing import Optional
from pydantic_settings import BaseSettings
from pydantic import Field


class Settings(BaseSettings):
    """Application settings loaded from environment variables"""
    
    # ============ AI Model ============
    llm_provider: str = Field(default="zhipu", description="LLM provider: 'zhipu' or 'qwen'")

    # ZhipuAI (智谱 AI)
    zhipu_api_key: str = Field(default="", description="ZhipuAI API Key")
    zhipu_model: str = Field(default="glm-4-flash", description="ZhipuAI Model name")

    # Qwen (通义千问)
    qwen_api_key: str = Field(default="", description="Qwen/DashScope API Key")
    qwen_model: str = Field(default="qwen-omni-turbo", description="Qwen Model name")

    # 通用配置
    enable_reasoning_mode: bool = Field(default=False, description="Enable AI reasoning/thinking mode (slower but more thoughtful)")
    reasoning_mode_for_complex: bool = Field(default=True, description="Enable reasoning mode only for complex queries")
    
    # ============ Redis ============
    redis_host: str = Field(default="localhost", description="Redis host")
    redis_port: int = Field(default=6379, description="Redis port")
    redis_password: Optional[str] = Field(default=None, description="Redis password")
    redis_db: int = Field(default=0, description="Redis database number")
    
    # ============ Chatwoot ============
    chatwoot_api_url: str = Field(..., description="Chatwoot API URL")
    chatwoot_api_token: str = Field(..., description="Chatwoot API Token")
    chatwoot_webhook_secret: Optional[str] = Field(default=None, description="Chatwoot Webhook Secret")
    
    # ============ Strapi CMS ============
    strapi_api_url: str = Field(..., description="Strapi API URL")
    strapi_api_token: str = Field(..., description="Strapi API Token")
    
    # ============ Hyperf API ============
    hyperf_api_url: str = Field(..., description="Hyperf API URL")
    hyperf_api_token: str = Field(..., description="Hyperf API Token")

    # ============ Frontend URLs ============
    frontend_url: str = Field(default="https://www.qa1.gaia888.com", description="Frontend URL for order details")
    
    # ============ MCP Servers ============
    strapi_mcp_url: str = Field(default="http://localhost:8001", description="Strapi MCP URL")
    order_mcp_url: str = Field(default="http://localhost:8002", description="Order MCP URL")
    aftersale_mcp_url: str = Field(default="http://localhost:8003", description="Aftersale MCP URL")
    product_mcp_url: str = Field(default="http://localhost:8004", description="Product MCP URL")
    
    # ============ Application Config ============
    log_level: str = Field(default="INFO", description="Log level")
    max_conversation_steps: int = Field(default=10, description="Max steps in conversation")
    conversation_timeout: int = Field(default=3600, description="Conversation timeout in seconds")
    
    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"
        case_sensitive = False


# Global settings instance
settings = Settings()


def get_redis_url() -> str:
    """Get Redis connection URL"""
    if settings.redis_password and settings.redis_password.strip():
        return f"redis://:{settings.redis_password}@{settings.redis_host}:{settings.redis_port}/{settings.redis_db}"
    return f"redis://{settings.redis_host}:{settings.redis_port}/{settings.redis_db}"