import { Component, ComponentInterface, Event, EventEmitter, Prop, Watch } from '@stencil/core';

@Component({
  tag: 'ion-route-redirect'
})
export class RouteRedirect implements ComponentInterface {

  /**
   * A redirect route, redirects "from" a URL "to" another URL. This property is that "from" URL.
   * It needs to be an exact match of the navigated URL in order to apply.
   *
   * The path specified in this value is always an absolute path, even if the initial `/` slash
   * is not specified.
   *
   */
  @Prop() from!: string;

  /**
   * A redirect route, redirects "from" a URL "to" another URL. This property is that "to" URL.
   * When the defined `ion-route-redirect` rule matches, the router will redirect to the path
   * specified in this property.
   *
   * The value of this property is always an absolute path inside the scope of routes defined in
   * `ion-router` it can't be used with another router or to perform a redirection to a different domain.
   *
   * Note that this is a virtual redirect, it will not cause a real browser refresh, again, it's
   * a redirect inside the context of ion-router.
   *
   * When this property is not specified or his value is `undefined` the whole redirect route is noop,
   * even if the "from" value matches.
   */
  @Prop() to!: string | undefined | null;

  /**
   * Internal event that fires when any value of this rule is added/removed from the DOM,
   * or any of his public properties changes.
   *
   * `ion-router` captures this event in order to update his internal registry of router rules.
   */
  @Event() ionRouteRedirectChanged!: EventEmitter;

  @Watch('from')
  @Watch('to')
  propDidChange() {
    this.ionRouteRedirectChanged.emit();
  }

  connectedCallback() {
    this.ionRouteRedirectChanged.emit();
  }
}
