from pyramid.httpexceptions import HTTPFound
from pyramid.security import remember, forget
from pyramid.view import view_config

from ordr.models import User


@view_config(
    context='ordr.resources.RootResource',
    permission='view',
    )
def welcome(context, request):
    ''' web root redirects '''
    next = 'orders' if request.user else 'login'
    redirect_to = request.resource_url(context, next)
    return HTTPFound(redirect_to)


@view_config(
    context='ordr.resources.RootResource',
    name='faq',
    permission='view',
    renderer='ordr:templates/pages/faq.jinja2'
    )
def faq(context, request):
    ''' displays the FAQ page '''
    return {}


@view_config(
    context='ordr.resources.RootResource',
    name='login',
    request_method='GET',
    permission='view',
    renderer='ordr:templates/pages/login.jinja2',
    )
def login(context, request):
    ''' shows the login page '''
    return {'loginerror': False}


@view_config(
    context='ordr.resources.RootResource',
    name='login',
    request_method='POST',
    permission='view',
    renderer='ordr:templates/pages/login.jinja2',
    )
def check_login(context, request):
    ''' check user credentials '''
    username = request.POST.get('username')
    password = request.POST.get('password')
    user = (
        request.dbsession
        .query(User)
        .filter_by(username=username)
        .first()
        )
        
    if user and user.is_active and user.check_password(password):
        headers = remember(request, user.id)
        return HTTPFound(request.resource_url(request.root), headers=headers)
    
    return {'loginerror': True}


@view_config(
    context='ordr.resources.RootResource',
    name='logout',
    permission='view'
    )
def logout(context, request):
    ''' log out of an user '''
    headers = forget(request)
    return HTTPFound(request.resource_url(request.root), headers=headers)