import re

from Utils.ErrorUtil import ReturnConditionCheckFailed


class Validate(object):

    @staticmethod
    def email(param):
        """"""
        regex = "^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$"
        case = (len(param) > 7) and (re.match(regex, param) is not None)
        result = True if case else False
        return result

    @staticmethod
    def password(param):
        """"""
        regex = "^(?![A-Za-z0-9]+$)(?![a-z0-9\\W]+$)(?![A-Za-z\\W]+$)(?![A-Z0-9\\W]+$)^.{8,}$"
        case = (len(param) >= 8) and (re.match(regex, param) is not None)
        return True if case else False


class ValidateAttr(object):

    def __init__(self, **kwargs):
        """"""
        self.kwargs = kwargs

    def __get__(self, instance, owner):
        if self.kwargs['field'] in instance.__dict__:
            return instance.__dict__[self.kwargs['field']]

    def __set__(self, instance, value):
        """"""

        def not_default():
            """无默认值时属性设值检查"""

            if 'type' in self.kwargs:
                """检查实例的属性类型"""
                if not isinstance(value, self.kwargs['type']):
                    raise ReturnConditionCheckFailed(self.kwargs['error_info'], self.kwargs['error_code'])

            if 'length' in self.kwargs:
                """检查实例的属性值长度(一般是str类型)"""
                if len(value) != self.kwargs['length']:
                    raise ReturnConditionCheckFailed(self.kwargs['error_info'], self.kwargs['error_code'])

            if 'in_list' in self.kwargs:
                """检查实例属性是否包含于列表中(属性有列表和非列表两种情况)"""
                if type(value) is not list:
                    if value not in self.kwargs['in_list']:
                        raise ReturnConditionCheckFailed(self.kwargs['error_info'], self.kwargs['error_code'])
                else:
                    for item in value:
                        if item not in self.kwargs['in_list']:
                            raise ReturnConditionCheckFailed(self.kwargs['error_info'], self.kwargs['error_code'])

            if 'instance_list' in self.kwargs:
                """检查实例列表"""
                if type(value) is not list:
                    raise ReturnConditionCheckFailed(self.kwargs['error_info'], self.kwargs['error_code'])
                else:
                    for item in value:
                        if not isinstance(item, self.kwargs['instance_list']):
                            raise ReturnConditionCheckFailed(self.kwargs['error_info'], self.kwargs['error_code'])

            if 'func' in self.kwargs:
                """属性检查函数"""
                if not list(map(self.kwargs['func'], [value]))[0]:
                    raise ReturnConditionCheckFailed(self.kwargs['error_info'], self.kwargs['error_code'])

            instance.__dict__[self.kwargs['field']] = value

        if 'default' in self.kwargs:
            """实例属性默认值"""
            if value is None:
                value = self.kwargs['default']
                instance.__dict__[self.kwargs['field']] = value
            else:
                not_default()
        else:
            not_default()