from flask_wtf import FlaskForm
from wtforms import PasswordField, StringField, SubmitField, ValidationError
from wtforms.validators import DataRequired, EqualTo, Length
from ..models import User


class ChangePasswordForm(FlaskForm):
    """
    Form to change information of currently logged in User. User can change
    informations about him on his own.
    """
    old_password = PasswordField('Old password', validators=[DataRequired()])
    new_password = PasswordField(
        'New password',
        validators=[DataRequired(),
                    EqualTo('new_password2', message='Passwords must match.')]
    )
    new_password2 = PasswordField(
        'Confirm new password',
        validators=[DataRequired(),
                    EqualTo('new_password', message='Passwords must match.')]
    )
    submit = SubmitField('Update Password')


class EditProfileForm(FlaskForm):
    email = StringField('Change Email',
                        validators=[Length(0, 254), DataRequired()])
    submit = SubmitField('Change Email')

    def __init__(self, user, *args, **kwargs):
        super(EditProfileForm, self).__init__(*args, **kwargs)
        self.user = user

    def validate_email(self, field):
        if field.data != self.user.email and \
                User.query.filter_by(email=field.data).first():
            raise ValidationError('Email already registered!')