/*!
 * (C) Gasco https://gasco-web-component.herokuapp.com/ - MIT License
 */
/**
 * When hardwareBackButton: false in config,
 * we need to make sure we also block the default
 * webview behavior. If we don't then it will be
 * possible for users to navigate backward while
 * an overlay is still open. Additionally, it will
 * give the appearance that the hardwareBackButton
 * config is not working as the page transition
 * will still happen.
 */
export const blockHardwareBackButton = () => {
  document.addEventListener('backbutton', () => { }); // eslint-disable-line
};
export const startHardwareBackButton = () => {
  const doc = document;
  let busy = false;
  doc.addEventListener('backbutton', () => {
    if (busy) {
      return;
    }
    let index = 0;
    let handlers = [];
    const ev = new CustomEvent('gascoBackButton', {
      bubbles: false,
      detail: {
        register(priority, handler) {
          handlers.push({ priority, handler, id: index++ });
        },
      },
    });
    doc.dispatchEvent(ev);
    const executeAction = async (handlerRegister) => {
      try {
        if (handlerRegister === null || handlerRegister === void 0 ? void 0 : handlerRegister.handler) {
          const result = handlerRegister.handler(processHandlers);
          if (result != null) {
            await result;
          }
        }
      }
      catch (e) {
        console.error(e);
      }
    };
    const processHandlers = () => {
      if (handlers.length > 0) {
        let selectedHandler = {
          priority: Number.MIN_SAFE_INTEGER,
          handler: () => undefined,
          id: -1,
        };
        handlers.forEach((handler) => {
          if (handler.priority >= selectedHandler.priority) {
            selectedHandler = handler;
          }
        });
        busy = true;
        handlers = handlers.filter((handler) => handler.id !== selectedHandler.id);
        executeAction(selectedHandler).then(() => (busy = false));
      }
    };
    processHandlers();
  });
};
export const OVERLAY_BACK_BUTTON_PRIORITY = 100;
export const MENU_BACK_BUTTON_PRIORITY = 99; // 1 less than overlay priority since menu is displayed behind overlays
