import os
from functools import lru_cache
from typing import TYPE_CHECKING

from pydantic import AliasChoices, Field
from pydantic_settings import BaseSettings, SettingsConfigDict

from app.config.path_conf import ENV_DIR

if TYPE_CHECKING:
    from alipay.aop.api.AlipayClientConfig import AlipayClientConfig


class AlipayConfig(BaseSettings):
    """支付宝SDK配置"""

    model_config = SettingsConfigDict(
        env_file=ENV_DIR / f".env.{os.getenv('ENVIRONMENT')}",
        env_file_encoding="utf-8",
        extra="ignore",
        case_sensitive=True,
    )

    app_id: str = Field(default="", validation_alias=AliasChoices("ALIPAY_APPID", "ALIPAY_APP_ID"), description="支付宝应用ID")
    app_private_key: str = Field(default="", validation_alias=AliasChoices("ALIPAY_PRIVATE_KEY"), description="应用私钥(RSA2)")
    alipay_public_key: str = Field(default="", validation_alias=AliasChoices("ALIPAY_PUBLIC_KEY"), description="支付宝公钥(RSA2)")
    format: str = Field(default="json", validation_alias=AliasChoices("ALIPAY_FORMAT"), description="响应格式")
    charset: str = Field(default="UTF-8", validation_alias=AliasChoices("ALIPAY_CHARSET"), description="字符集")
    sign_type: str = Field(default="RSA2", validation_alias=AliasChoices("ALIPAY_SIGN_TYPE"), description="签名类型(RSA/RSA2)")
    sandbox: bool = Field(default=False, validation_alias=AliasChoices("ALIPAY_SANDBOX"), description="是否沙箱环境")
    notify_url: str = Field(default="", validation_alias=AliasChoices("ALIPAY_NOTIFY_URL"), description="异步通知地址")
    return_url: str = Field(default="", validation_alias=AliasChoices("ALIPAY_RETURN_URL"), description="同步跳转地址")

    max_retries: int = Field(default=3, description="最大重试次数")
    request_timeout: int = Field(default=30, description="请求超时时间(秒)")
    rate_limit: int = Field(default=100, description="限流阈值(每分钟)")

    # production_server_url: str = Field(default="https://openapi.alipay.com/gateway.do", description="生产环境网关地址")
    # sandbox_server_url: str = Field(default="https://openapi-sandbox.dl.alipaydev.com/gateway.do", description="沙箱环境网关地址")
    #
    # @property
    # def server_url(self) -> str:
    #     """获取支付宝网关地址"""
    #     if self.sandbox:
    #         return self.sandbox_server_url
    #     return self.production_server_url

    @property
    def is_valid(self) -> bool:
        """检查配置是否有效"""
        return bool(self.app_id and self.app_private_key and self.alipay_public_key)

    def to_alipay_client_config(self) -> "AlipayClientConfig":
        """转换为官方AlipayClientConfig"""
        from alipay.aop.api.AlipayClientConfig import AlipayClientConfig

        config = AlipayClientConfig(sandbox_debug=self.sandbox)
        config.app_id = self.app_id
        config.app_private_key = self.app_private_key
        config.alipay_public_key = self.alipay_public_key
        config.format = self.format
        config.charset = self.charset
        config.sign_type = self.sign_type
        return config


@lru_cache(maxsize=1)
def get_alipay_config() -> AlipayConfig:
    """获取支付宝配置单例"""
    return AlipayConfig()