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

    @staticmethod
    def date_format(param):
        """yyyy-mm-dd"""
        regex = "\d{4}-\d{1,2}-\d{1,2}"
        case = re.match(regex, param) is not None
        return True if case else False

    @staticmethod
    def time_format(param):
        """yyyy-mm-dd hh:mm:ss"""
        regex = "\d{4}-\d{1,2}-\d{1,2} \d{1,2}:\d{1,2}:\d{1,2}"
        case = re.match(regex, param) is not None
        return True if case else False

    @staticmethod
    def image(param):
        """"""
        mimetype = param.mimetype
        return True if mimetype in ['image/jpeg', 'image/png'] else False


class ValidateAttr(object):

    def __init__(self, **kwargs):
        """"""
        self.kwargs = kwargs
        self.error_info = kwargs['error_info'] if 'error_info' in kwargs else ('{}异常'.format(kwargs['mark']) if 'mark' in kwargs else None)
        self.error_code = kwargs['error_code'] if 'error_code' in kwargs else 200

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

    def __set__(self, instance, value):
        """"""
        try:
            self.error_info = '{}异常'.format(instance.fields_map[self.kwargs['field']])
        except AttributeError:
            pass

        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 type(self.kwargs['type']) is list:
                    if type(value) not in self.kwargs['type']:
                        raise ReturnConditionCheckFailed(self.error_info, self.error_code)
                else:
                    if not isinstance(value, self.kwargs['type']):
                        raise ReturnConditionCheckFailed(self.error_info, self.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.error_info, self.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.error_info, self.error_code)
                else:
                    for item in value:
                        if item not in self.kwargs['in_list']:
                            raise ReturnConditionCheckFailed(self.error_info, self.error_code)

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