import logging
import json
from django.conf import settings

from aliyunsdkcore.client import AcsClient
from aliyunsdkcore.request import CommonRequest

from .base import BaseSmsBackend


logger = logging.getLogger(__name__)


DOMESTIC_VERIFICATION_TEMPLATE_ID = 'SMS_205132276'
HK_MACAO_VERIFICATION_TEMPLATE_ID = 'SMS_226416620'
HK_MACAO_PHONE_PREFIXES = ('+852', '+853')


def get_verification_template_id(phone):
    if str(phone).startswith(HK_MACAO_PHONE_PREFIXES):
        return HK_MACAO_VERIFICATION_TEMPLATE_ID
    return DOMESTIC_VERIFICATION_TEMPLATE_ID


def get_aliyun_phone_number(phone):
    """Convert the stored E.164 number to Aliyun's country-code format."""
    return str(phone).removeprefix('+')


class SmsBackend(BaseSmsBackend):

    def __init__(self, *args, **kwargs):
        self.client = AcsClient(
            getattr(settings, 'ALIYUN_SMS_ACCESS_KEY', None),
            getattr(settings, 'ALIYUN_SMS_ACCESS_SECRET', None),
            'cn-hangzhou'
        )
        super(SmsBackend, self).__init__(*args, **kwargs)

    def send_message(self, phone, params, template_id=None):
        if template_id is None:
            template_id = get_verification_template_id(phone)

        try:
            request = CommonRequest()
            request.set_accept_format('json')
            request.set_domain('dysmsapi.aliyuncs.com')
            request.set_method('POST')
            request.set_protocol_type('https')
            request.set_version('2017-05-25')
            request.set_action_name('SendSms')

            request.add_query_param('RegionId', "cn-hangzhou")
            request.add_query_param('PhoneNumbers', get_aliyun_phone_number(phone))
            request.add_query_param('SignName', "平凯星辰")
            request.add_query_param('TemplateCode', template_id)
            request.add_query_param('TemplateParam', json.dumps(params))

            response = self.client.do_action(request)
            print(str(response, encoding='utf-8'))
        except Exception as e:
            logger.error('Aliyun Send SMS failed, {}'.format(e))