"""
SMS 服务抽象层
Mock 模式：验证码打印到后端日志
后续可接入阿里云短信 / 腾讯云 SMS，只需替换 Provider 实现
"""
import logging
from abc import ABC, abstractmethod
from app.core.config import settings

logger = logging.getLogger(__name__)


class SmsProvider(ABC):
    """SMS 发送提供者基类"""

    @abstractmethod
    async def send(self, phone: str, code: str) -> bool:
        """发送验证码短信，成功返回 True"""
        ...


class MockSmsProvider(SmsProvider):
    """Mock 提供者 —— 验证码打印到后端日志（开发/测试环境用）"""

    async def send(self, phone: str, code: str) -> bool:
        logger.info("=" * 50)
        logger.info("📱 [MockSMS] 验证码: %s → %s", code, phone)
        logger.info("=" * 50)
        return True


class TencentSmsProvider(SmsProvider):
    """腾讯云 SMS 提供者（待接入）"""

    def __init__(self, secret_id: str, secret_key: str, app_id: str, sign_name: str, template_id: str):
        self.secret_id = secret_id
        self.secret_key = secret_key
        self.app_id = app_id
        self.sign_name = sign_name
        self.template_id = template_id

    async def send(self, phone: str, code: str) -> bool:
        # TODO: 接入腾讯云 SMS SDK
        logger.warning("TencentSmsProvider 尚未实现，验证码: %s → %s", code, phone)
        return False


class AliyunSmsProvider(SmsProvider):
    """阿里云短信提供者（待接入）"""

    def __init__(self, access_key_id: str, access_key_secret: str, sign_name: str, template_code: str):
        self.access_key_id = access_key_id
        self.access_key_secret = access_key_secret
        self.sign_name = sign_name
        self.template_code = template_code

    async def send(self, phone: str, code: str) -> bool:
        # TODO: 接入阿里云短信 SDK
        logger.warning("AliyunSmsProvider 尚未实现，验证码: %s → %s", code, phone)
        return False


def get_sms_provider() -> SmsProvider:
    """根据配置返回 SMS 提供者实例"""
    provider_name = getattr(settings, "SMS_PROVIDER", "mock") or "mock"

    if provider_name == "tencent":
        return TencentSmsProvider(
            secret_id=getattr(settings, "TENCENT_SMS_SECRET_ID", ""),
            secret_key=getattr(settings, "TENCENT_SMS_SECRET_KEY", ""),
            app_id=getattr(settings, "TENCENT_SMS_APP_ID", ""),
            sign_name=getattr(settings, "TENCENT_SMS_SIGN_NAME", ""),
            template_id=getattr(settings, "TENCENT_SMS_TEMPLATE_ID", ""),
        )
    elif provider_name == "aliyun":
        return AliyunSmsProvider(
            access_key_id=getattr(settings, "ALIYUN_SMS_ACCESS_KEY_ID", ""),
            access_key_secret=getattr(settings, "ALIYUN_SMS_ACCESS_KEY_SECRET", ""),
            sign_name=getattr(settings, "ALIYUN_SMS_SIGN_NAME", ""),
            template_code=getattr(settings, "ALIYUN_SMS_TEMPLATE_CODE", ""),
        )
    else:
        return MockSmsProvider()