"""
Configuration management for OmniShopAgent
Loads environment variables and provides configuration objects
"""

import os
from typing import Optional

from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    """Application settings loaded from environment variables

    All settings can be configured via .env file or environment variables.
    """

    # OpenAI Configuration
    openai_api_key: str
    openai_model: str = "gpt-4o-mini"
    openai_temperature: float = 0.7
    openai_max_tokens: int = 1000
    # Base URL for OpenAI-compatible APIs (e.g. Qwen/DashScope)
    # Qwen 北京: https://dashscope.aliyuncs.com/compatible-mode/v1
    openai_api_base_url: Optional[str] = None

    # Search Configuration
    top_k_results: int = 10
    similarity_threshold: float = 0.6

    # Search API (see docs/搜索API对接指南.md)
    search_api_base_url: str = "http://120.76.41.98:6002"
    search_api_tenant_id: str = "162"

    # Application Configuration
    app_host: str = "0.0.0.0"
    app_port: int = 8000
    debug: bool = True
    log_level: str = "INFO"

    # Data Paths
    raw_data_path: str = "./data/raw"
    processed_data_path: str = "./data/processed"
    image_data_path: str = "./data/images"

    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"
        case_sensitive = False
        extra = "ignore"


# Global settings instance
settings = Settings()


# Helper function to get absolute paths
def get_absolute_path(relative_path: str) -> str:
    """Convert relative path to absolute path"""
    base_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    return os.path.join(base_dir, relative_path)