from fields import Field, TextField, MoneyField, StateField

class Model(object):
    def __init__(self):
        for (key, value) in self.__class__.__dict__.items():
            if isinstance(value, Field):
                field = getattr(self, key)
                if not field.name:
                    setattr(field, 'name', key)

    def __setattr__(self, key, value):
        if hasattr(self, key) and isinstance(getattr(self, key), Field):
            getattr(self, key).value = value
        else:
            self.__dict__[key] = value

    def get_fields(self):
        fields = []
        for key in self.__class__.__dict__.keys():
            attr = getattr(self, key)
            if isinstance(attr, Field):
                fields.append(attr)  
        return fields

    def get_sorted_fields(self):
        fields = self.get_fields()
        fields.sort(key=lambda x:x.creation_counter)
        return fields

    def validate(self):
        for f in self.get_fields():
            f.validate()

    def output(self):
        return ''.join([field.get_data() for field in self.get_sorted_fields()])
    

        
class TestModel(Model):
    field_a = TextField(max_length=20)
    field_b = MoneyField(max_length=10)
    state = StateField()