"""
应用配置管理
处理环境变量和系统配置
"""

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


class Settings(BaseSettings):
    """应用设置类"""
    
    # 应用基础配置
    APP_NAME: str = "基本面选股系统"
    APP_VERSION: str = "1.0.0"
    DEBUG: bool = False
    
    # 数据库配置
    DATABASE_URL: str = "postgresql+asyncpg://user:password@localhost:5432/stock_analysis"
    DATABASE_ECHO: bool = False
    
    # API配置
    API_V1_STR: str = "/api"
    ALLOWED_ORIGINS: List[str] = ["http://localhost:3000", "http://127.0.0.1:3000"]
    
    # 外部服务配置
    GEMINI_API_KEY: Optional[str] = None
    TUSHARE_TOKEN: Optional[str] = None
    
    # 数据源配置
    CHINA_DATA_SOURCE: str = "tushare"
    HK_DATA_SOURCE: str = "yahoo"
    US_DATA_SOURCE: str = "yahoo"
    JP_DATA_SOURCE: str = "yahoo"
    
    # 报告生成配置
    MAX_CONCURRENT_REPORTS: int = 5
    REPORT_TIMEOUT_MINUTES: int = 30
    
    # 缓存配置
    CACHE_TTL_SECONDS: int = 3600  # 1小时
    
    @validator("ALLOWED_ORIGINS", pre=True)
    def assemble_cors_origins(cls, v):
        """处理CORS origins配置"""
        if isinstance(v, str):
            return [i.strip() for i in v.split(",")]
        return v
    
    @validator("DATABASE_URL", pre=True)
    def assemble_db_connection(cls, v):
        """处理数据库连接字符串"""
        if v and not v.startswith("postgresql"):
            raise ValueError("数据库URL必须使用PostgreSQL")
        return v
    
    class Config:
        env_file = ".env"
        case_sensitive = True


# 创建全局设置实例
settings = Settings()


class DatabaseConfig:
    """数据库配置类"""
    
    def __init__(self):
        self.url = settings.DATABASE_URL
        self.echo = settings.DATABASE_ECHO
        self.pool_size = 10
        self.max_overflow = 20
        self.pool_timeout = 30
        self.pool_recycle = 3600


class ExternalAPIConfig:
    """外部API配置类"""
    
    def __init__(self):
        self.gemini_api_key = settings.GEMINI_API_KEY
        self.tushare_token = settings.TUSHARE_TOKEN
        
        # 数据源配置
        self.data_sources_config = {
            "tushare": {
                "enabled": bool(self.tushare_token),
                "api_key": self.tushare_token,
                "token": self.tushare_token,
                "base_url": "http://api.tushare.pro",
                "timeout": 30,
                "max_retries": 3,
                "retry_delay": 1,
                "name": "tushare"
            },
            "yahoo": {
                "enabled": True,
                "base_url": "https://query1.finance.yahoo.com",
                "timeout": 30,
                "max_retries": 3,
                "retry_delay": 1,
                "name": "yahoo"
            }
        }
        
        # AI服务配置
        self.ai_services_config = {
            "gemini": {
                "enabled": bool(self.gemini_api_key),
                "api_key": self.gemini_api_key,
                "model": "gemini-pro",
                "base_url": "https://generativelanguage.googleapis.com/v1beta",
                "timeout": 60,
                "max_retries": 3,
                "retry_delay": 2,
                "temperature": 0.7,
                "top_p": 0.8,
                "top_k": 40,
                "max_output_tokens": 8192
            }
        }
        
    def validate_gemini_config(self) -> bool:
        """验证Gemini API配置"""
        return bool(self.gemini_api_key)
    
    def validate_tushare_config(self) -> bool:
        """验证Tushare API配置"""
        return bool(self.tushare_token)
    
    def get_data_source_manager_config(self) -> dict:
        """获取数据源管理器配置"""
        return {
            "data_sources": self.data_sources_config,
            "ai_services": self.ai_services_config,
            "market_mapping": {
                "china": "tushare",
                "中国": "tushare",
                "hongkong": "yahoo",
                "香港": "yahoo",
                "usa": "yahoo",
                "美国": "yahoo",
                "japan": "yahoo",
                "日本": "yahoo"
            },
            "fallback_sources": {
                "tushare": ["yahoo"],
                "yahoo": ["tushare"]
            }
        }


class DataSourceConfig:
    """数据源配置类"""
    
    def __init__(self):
        self.sources = {
            "china": settings.CHINA_DATA_SOURCE,
            "hongkong": settings.HK_DATA_SOURCE,
            "usa": settings.US_DATA_SOURCE,
            "japan": settings.JP_DATA_SOURCE
        }
    
    def get_source_for_market(self, market: str) -> str:
        """根据市场获取数据源"""
        market_mapping = {
            "中国": "china",
            "香港": "hongkong", 
            "美国": "usa",
            "日本": "japan"
        }
        
        market_key = market_mapping.get(market, "china")
        return self.sources.get(market_key, "tushare")


# 创建配置实例
db_config = DatabaseConfig()
api_config = ExternalAPIConfig()
data_source_config = DataSourceConfig()