/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

use dom::bindings::codegen::Bindings::ServiceWorkerBinding::ServiceWorkerState;
use dom::bindings::codegen::Bindings::ServiceWorkerRegistrationBinding::{ServiceWorkerRegistrationMethods, Wrap};
use dom::bindings::global::GlobalRef;
use dom::bindings::js::{JS, Root};
use dom::bindings::reflector::reflect_dom_object;
use dom::bindings::str::USVString;
use dom::eventtarget::EventTarget;
use dom::serviceworker::ServiceWorker;
use dom::serviceworkercontainer::Controllable;
use url::Url;

#[dom_struct]
pub struct ServiceWorkerRegistration {
    eventtarget: EventTarget,
    active: Option<JS<ServiceWorker>>,
    installing: Option<JS<ServiceWorker>>,
    waiting: Option<JS<ServiceWorker>>,
    scope: String,
}

impl ServiceWorkerRegistration {
    fn new_inherited(active_sw: &ServiceWorker, scope: String) -> ServiceWorkerRegistration {
        ServiceWorkerRegistration {
            eventtarget: EventTarget::new_inherited(),
            active: Some(JS::from_ref(active_sw)),
            installing: None,
            waiting: None,
            scope: scope
        }
    }
    #[allow(unrooted_must_root)]
    pub fn new(global: GlobalRef,
               script_url: Url,
               scope: String,
               container: &Controllable) -> Root<ServiceWorkerRegistration> {
        let active_worker = ServiceWorker::init_service_worker(global, script_url, true);
        active_worker.set_transition_state(ServiceWorkerState::Installed);
        container.set_controller(&*active_worker.clone());
        reflect_dom_object(box ServiceWorkerRegistration::new_inherited(&*active_worker, scope), global, Wrap)
    }
}

impl ServiceWorkerRegistrationMethods for ServiceWorkerRegistration {
    // https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#service-worker-registration-installing-attribute
    fn GetInstalling(&self) -> Option<Root<ServiceWorker>> {
        self.installing.as_ref().map(|sw| Root::from_ref(&**sw))
    }

    // https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#service-worker-registration-active-attribute
    fn GetActive(&self) -> Option<Root<ServiceWorker>> {
        self.active.as_ref().map(|sw| Root::from_ref(&**sw))
    }

    // https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#service-worker-registration-waiting-attribute
    fn GetWaiting(&self) -> Option<Root<ServiceWorker>> {
        self.waiting.as_ref().map(|sw| Root::from_ref(&**sw))
    }

    // https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#service-worker-registration-scope-attribute
    fn Scope(&self) -> USVString {
        USVString(self.scope.clone())
    }
}