#!/usr/bin/env python
# -*- encoding: utf-8 -*-

"""User management."""

import logging

from flask import Blueprint
from flask import request
from flask import jsonify

from sqlalchemy.exc import IntegrityError

from luncho.helpers import ForceJSON
from luncho.helpers import user_from_token

from luncho.server import User
from luncho.server import db

from luncho.exceptions import LunchoException

LOG = logging.getLogger('luncho.blueprints.users')

users = Blueprint('users', __name__)


class UsernameAlreadyExistsException(LunchoException):
    """The username is already taken."""
    def __init__(self):
        super(UsernameAlreadyExistsException, self).__init__()
        self.status = 409
        self.message = 'Username already exists'


@users.route('', methods=['PUT'])
@ForceJSON(required=['username', 'full_name', 'password'])
def create_user():
    """Create a new user. Request must be:
    { "username": "username", "full_name": "Full Name", "password": "hash" }"""
    json = request.get_json(force=True)

    try:
        new_user = User(username=json['username'],
                        fullname=json['full_name'],
                        passhash=json['password'],
                        verified=False)

        db.session.add(new_user)
        db.session.commit()
    except IntegrityError:
        raise UsernameAlreadyExistsException()

    return jsonify(status='OK')


@users.route('<token>/', methods=['POST'])
@ForceJSON()
def update_user(token):
    """Update user information. Request can have the following fields:
    { "full_name": "Full name", "password": "hash" }
    Any other field will be ignored; only fields that need to be changed
    must be send."""
    json = request.get_json(force=True)
    user = user_from_token(token)

    if 'full_name' in json:
        LOG.debug('Fullname = {fullname}'.format(fullname=json['full_name']))
        user.fullname = json['full_name']

    if 'password' in json:
        LOG.debug('Passhash = {password}'.format(password=json['password']))
        user.passhash = json['password']

    db.session.commit()
    return jsonify(status='OK')


@users.route('<token>/', methods=['DELETE'])
def delete_user(token):
    """Delete a user. No confirmation is send."""
    user = user_from_token(token)
    db.session.delete(user)
    db.session.commit()
    return jsonify(status='OK')