import logging

from django.conf import settings

logger = logging.getLogger(__name__)

_SCENE_TEMPLATE = {
    'register': 'ALIYUN_SMS_TEMPLATE_REGISTER',
    'login': 'ALIYUN_SMS_TEMPLATE_LOGIN',
    'reset': 'ALIYUN_SMS_TEMPLATE_RESET',
}


class AliyunSmsService:
    """阿里云短信实现。SDK 按需 import，避免未安装时影响 mock 模式启动。"""

    def send_code(self, phone: str, scene: str, code: str) -> None:
        from apps.user.utils.sms import SmsError

        try:
            from alibabacloud_dysmsapi20170525.client import Client
            from alibabacloud_dysmsapi20170525 import models as sms_models
            from alibabacloud_tea_openapi import models as open_api_models
        except ImportError as e:
            logger.error('Aliyun SMS SDK not installed: %s', e)
            raise SmsError('SMS_PROVIDER_ERROR') from e

        config = open_api_models.Config(
            access_key_id=settings.ALIYUN_SMS_ACCESS_KEY_ID,
            access_key_secret=settings.ALIYUN_SMS_ACCESS_KEY_SECRET,
        )
        config.endpoint = 'dysmsapi.aliyuncs.com'
        client = Client(config)

        template_attr = _SCENE_TEMPLATE.get(scene, '')
        template_code = getattr(settings, template_attr, '')

        req = sms_models.SendSmsRequest(
            phone_numbers=phone,
            sign_name=settings.ALIYUN_SMS_SIGN_NAME,
            template_code=template_code,
            template_param=f'{{"code":"{code}"}}',
        )

        try:
            resp = client.send_sms(req)
            if resp.body.code != 'OK':
                logger.error(
                    'Aliyun SMS biz error: code=%s msg=%s request_id=%s',
                    resp.body.code, resp.body.message, resp.body.request_id,
                )
                raise SmsError('SMS_BIZ_ERROR')
        except SmsError:
            raise
        except Exception as e:
            logger.error('Aliyun SMS provider error: %s', e)
            raise SmsError('SMS_PROVIDER_ERROR') from e