import { coerceBooleanProperty } from '@angular/cdk/coercion';

// tslint:disable-next-line:no-any
type Constructor<T> = new (...args: any[]) => T;

/** Interface to implement when applying the disabled mixin */
export interface ICanDisable {
  disabled: boolean;

  onDisabledChange(v: boolean): void;
}

/** Mixin to augment a component or directive with a `disabled` property. */
export function mixinDisabled<T extends Constructor<{}>>(base: T): Constructor<ICanDisable> & T {
  return class extends base {

    private _disabled: boolean = false;
    // tslint:disable-next-line:no-any
    constructor(...args: any[]) {
      super(...args);
    }

    get disabled(): boolean {
      return this._disabled;
    }

    set disabled(value: boolean) {
      const newValue: boolean = coerceBooleanProperty(value);
      if (this._disabled !== newValue) {
        this._disabled = newValue;
        this.onDisabledChange(this._disabled);
      }
    }

    onDisabledChange(v: boolean): void {
      /** NOT IMPLEMENTED, this needs to be overriden by subclasses if needed */
    }
  };
}