from apistar import Include, Route, http, annotate
from apistar.backends import sqlalchemy_backend
from apistar.backends.sqlalchemy_backend import Session
from apistar.frameworks.wsgi import WSGIApp as App
from apistar.handlers import docs_urls, static_urls
from apistar.interfaces import Router, Injector, Auth
from apistar_jwt.authentication import JWTAuthentication
from cookie_api.auth import auth_routes, auth_components
from cookie_api.commands import commands
from cookie_api.models import Cookie


@annotate(authentication=[JWTAuthentication()])
def get_state(injector: Injector, auth: Auth):
    state = injector.state
    d = dict()
    for k, v in state.items():
        d[k] = str(v)
    return d


def get_cookies(session: Session):
    cookies = session.query(Cookie).all()
    result = [cookie.to_dict() for cookie in cookies]

    return result


def get_cookie(session: Session, id):
    cookie = session.query(Cookie).filter_by(id=id).one_or_none()
    if cookie is None:
        msg = {"error": "404 Not Found"}
        return http.Response(msg, status=404)
    return cookie.to_dict()


def create_cookie(session: Session, json_data: http.RequestData, route: Router):
    cookie = Cookie(name=json_data['name'],
                    recipe_url=json_data['recipe_url'],
                    sku=json_data['sku'],
                    qoh=json_data['qoh'],
                    unit_cost=json_data['unit_cost'])
    session.add(cookie)
    session.commit()
    headers = {'Location': route.reverse_url('get_cookie', dict(id=cookie.id))}
    return http.Response(cookie.to_dict(), status=201, headers=headers)


routes = [
    Route('/state', 'GET', get_state),
    Route('/cookies', 'GET', get_cookies),
    Route('/cookies', 'POST', create_cookie),
    Route('/cookies/{id}', 'GET', get_cookie),
    Include('/docs', docs_urls),
    Include('/static', static_urls)
]

routes = routes + auth_routes

commands = sqlalchemy_backend.commands + commands

components = sqlalchemy_backend.components + auth_components


def application_factory(settings={}):
    """Returns an instance of Cookie API"""
    return App(settings=settings,
               commands=commands,
               components=components,
               routes=routes)