from rest_framework import serializers


class CustomDateField(serializers.DateField):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, format='%Y-%m-%d', **kwargs)


class CustomDateTimeField(serializers.DateTimeField):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, format='%Y-%m-%d %H:%M:%S', **kwargs)


class CustomSerializerMethodField(serializers.SerializerMethodField):

    def __init__(self, method_name=None, **kwargs):
        super().__init__(method_name, **kwargs)
        self.field_name = None

    def bind(self, field_name, parent):
        self.field_name = field_name
        return super().bind(field_name, parent)

    def to_representation(self, value):
        method = getattr(self.parent, self.method_name)
        return method(value, self.field_name)


class CustomMoneyField(serializers.IntegerField):
    def to_representation(self, value):
        return value / 100 if value else 0