import json

from apistar import Include, Route, annotate, http
from apistar.interfaces import Router

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 models.schema import Base, Cookie
from render import JSONRenderer


def welcome(name=None):
    if name is None:
        return {'message': 'Welcome to API Star!'}
    return {'message': 'Welcome to API Star, %s!' % name}


@annotate(renderers=[JSONRenderer()])
def get_cookies(session: Session):
    cookies = session.query(Cookie).all()
    # result = [{"id": cookie.id,
    #           "created_date": cookie.created_date,
    #           "modified_date": cookie.modified_date,
    #           "name": cookie.name,
    #          "recipe_url": cookie.recipe_url,
    #           "sku": cookie.sku,
    #           "qoh": cookie.qoh,
    #           "unit_cost": cookie.unit_cost}
    #          for cookie in cookies]
    result = [cookie.to_dict() for cookie in cookies]

    return result


@annotate(renderers=[JSONRenderer()])
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.flush()
    headers = {'Location': route.reverse_url('get_cookie', dict(id=cookie.id))}
    return http.Response(cookie.to_dict(), status=201, headers=headers)


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

settings = {
    'DATABASE': {
        'URL': 'postgresql://:@localhost/apistar',
        'METADATA': Base.metadata
    }
}

app = App(routes=routes,
          settings=settings,
          commands=sqlalchemy_backend.commands,
          components=sqlalchemy_backend.components
          )


if __name__ == "__main__":
    app.main()