from flask import current_app
from ..models import User
from flask_wtf import FlaskForm
from wtforms import (BooleanField, PasswordField, StringField, SubmitField,
                     ValidationError)
from wtforms.validators import DataRequired, Email, EqualTo, Length, Regexp


class LoginForm(FlaskForm):
    user = StringField('Email or username', validators=[DataRequired()])
    password = PasswordField('Password', validators=[DataRequired()])
    remember_me = BooleanField('Keep me logged in')
    submit = SubmitField('Log In')


class RegistrationForm(FlaskForm):
    email = StringField('Email', validators=[DataRequired(), Email()])
    username = StringField(
        'Username',
        validators=[DataRequired(), Length(1, 64),
                    Regexp(current_app.config['ALLOWED_USERNAME_REGEX'],
                           message='Usernames must have only letters, numbers,'
                                   ' dots or underscores')]
    )
    password = PasswordField(
        'Password',
        validators=[DataRequired(), EqualTo('password_confirmation',
                                            message='Passwords must match.')]
    )
    password_confirmation = PasswordField(
        'Password confirmation',
        validators=[DataRequired(), EqualTo('password',
                                            message='Passwords must match.')]
    )
    submit = SubmitField('Register')

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

    def validate_username(self, field):
        if User.query.filter_by(username=field.data).first():
            raise ValidationError('Username already in use.')


class ResetPasswordForm(FlaskForm):
    password = PasswordField(
        'New password',
        validators=[DataRequired(), EqualTo('password_confirmation',
                                            message='Passwords must match.')]
    )
    password_confirmation = PasswordField(
        'Password confirmation',
        validators=[DataRequired(),
                    EqualTo('password', message='Passwords must match.')]
    )
    submit = SubmitField('Reset Password')


class ResetPasswordRequestForm(FlaskForm):
    email = StringField('Email', validators=[DataRequired(), Email()])
    submit = SubmitField('Reset Password')