# -*- coding: utf-8 -*-
from .__load__ import *
class Auth(object):
    def init(self, param=param, request=False):
        if 'appid' not in param:
            return '参数错误：appid'
        if 'timestamp' not in param:
            return '参数错误：timestamp'
        if 'nonce' not in param:
            return '参数错误：nonce'
        if 'signature' not in param:
            return '参数错误：signature'

        model = Demeter.model('site')
        model.appid = param['appid']
        site = model.select(type='fetchone')
        if not site:
            return '站点信息不存在'

        time = Demeter.time()
        if time < site['sdate'] or time > site['edate']:
            return '授权已失效'
        if time - int(param['timestamp']) > 600:
            return '签名已过期'

        if request:
            # 针对域名做白名单
            referer = request.headers.get("Referer")
            if not referer:
                return '验证失败：来源错误'

            host = Demeter.host(site['link'])
            if host != Demeter.host(referer):
                return '验证失败：来源错误'

            uri = self.getHost(request) + request.uri
            if referer == uri:
                return '验证失败：来源错误'

        param['appsecret'] = site['appsecret']
        if self.signature(param) != signature:
            return '验签失败'
        return site

    def getHost(self, request):
        host = request.host.replace(':8088', '')
        host = request.protocol + "://" + host
        return host

    def signature(self, param):
        for k, v in param.items():
            all_params[k] = str(v)
        sorted_items = sorted(all_params.items(), key=lambda x: x[0])
        param_str = "&".join(f"{k}={v}" for k, v in sorted_items)
        return Demeter.md5(param_str)


    # sign 只能使用一次 以后再说吧
    def check(self, param):
        model = Demeter.model('signature')
        model.appid = param['appid']
        model.signature = param['signature']
        info = model.select(type='fetchone')
        if info:
            return False
        model.site_id = param['appid']
        model.signature = param['signature']
        model.insert()

    def clear(self):
        num = Demeter.time() - 3600*24
        model = Demeter.model('signature')
        model.cdate.assign(num, exp='<=')
        model.delete()