import {Dialog} from '../Dialog';
import {DialogImpl} from './DialogImpl';
import {DialogProvider} from '../DialogProvider';
import {DialogExtension} from '../DialogExtension';
import {DialogCreationOptions, DIALOG_SIZES} from '../DialogCreationOptions';

export class ButtonState {

  enabled: boolean = true;

  visible: boolean = true;

}

/**
 * An implementation of DialogProvider.
 */
export class DialogProviderImpl implements DialogProvider {

  activeDialog : Dialog | null = null;
  buttonIdsToStates = new Map<string, ButtonState>();

  close(): void {

  }

  setButtonDisabled(identifier: string, disabled: boolean): void {
    let buttonState = this.buttonIdsToStates.get(identifier);
    if (!buttonState) {
      buttonState = new ButtonState();
      this.buttonIdsToStates.set(identifier, buttonState);
    }
    buttonState.enabled = !disabled;
  }

  isButtonDisabled(identifier: string): boolean {
    let buttonState = this.buttonIdsToStates.get(identifier);
    if (buttonState) {
      return !buttonState.enabled;
    } else {
      return false;
    }
  }

  toggleButton(identifier: string): void {
    let buttonState = this.buttonIdsToStates.get(identifier);
    if (!buttonState) {
      buttonState = new ButtonState();
      this.buttonIdsToStates.set(identifier, buttonState);
    }
    buttonState.enabled = !buttonState.enabled;
  }

  setButtonHidden(identifier: string, hidden: boolean): void {
    let buttonState = this.buttonIdsToStates.get(identifier);
    if (!buttonState) {
      buttonState = new ButtonState();
      this.buttonIdsToStates.set(identifier, buttonState);
    }
    buttonState.visible = !hidden;
  }

  isButtonHidden(identifier: string): boolean {
    let buttonState = this.buttonIdsToStates.get(identifier);
    if (buttonState) {
      return !buttonState.visible;
    } else {
      return false;
    }
  }

  isActiveDialog(addon_key: string): boolean {
    const activeDialog = this.activeDialog;
    return activeDialog !== null && activeDialog.isOpen() && activeDialog.addon_key === addon_key;
  }

  create(dialogCreationOptions: DialogCreationOptions, dialogExtension: DialogExtension): Dialog {
    if (!DIALOG_SIZES.hasOwnProperty(dialogCreationOptions.size)) {
        throw new TypeError('Invalid dialog size: ' + dialogCreationOptions.size);
    };
    this.activeDialog = new DialogImpl(dialogCreationOptions, dialogExtension);
    return this.activeDialog;
  }

}