import	{
			Component,
			Input,
			ViewEncapsulation,
			OnDestroy
		}										from '@angular/core'

import	{
			b64EncodeUnicode
		}										from '@rcc/core'

import	{
			Subscription
		}										from 'rxjs'

import	{
			Action,
			PathAction,
			HandlerAction,
			DownloadAction,
			isPathAction,
			isHandlerAction,
			isDownloadAction,
			hasNotification,
			WithChildComponent,
			WithDescription,
		}										from '../../actions'

import	{
			RccToastController,
			RccAlertController
		}										from '../../modals-provider'


@Component({
	selector:		'rcc-action-button',
	templateUrl:	'./action-button.component.html',
	styleUrls:		['./action-button.component.css'],
	encapsulation:	ViewEncapsulation.None
})
export class RccActionButtonComponent implements OnDestroy {


	public notificationValue 	: boolean | number = false

	protected notificationSub	: Subscription
	protected _action 			: Action | null



	constructor(
		public rccToastController: RccToastController,
		public rccAlertController: RccAlertController
	){}

	@Input()
	set action(action: Action | null) {

		this.notificationSub?.unsubscribe()
		this.notificationValue 	= null
		this._action 			= null

		if(!action) return;

		this._action 			= action

		if(!hasNotification(action)) return;

		this.notificationSub 	= action.notification.subscribe( value => this.notificationValue = value)

	}

	get action(): Action | null { return this._action }


	public async execute(action: HandlerAction): Promise<void> {

		if(action.confirmMessage) 		await this.rccAlertController.confirm(action.confirmMessage)

		try {
			action.handler()
			action.successMessage && void this.rccToastController.success(action.successMessage)
		}catch(e){
			action.failureMessage && void this.rccToastController.failure(action.failureMessage)
		}

	}

	public getDataString(action:DownloadAction) : string {

		const base64Data =  b64EncodeUnicode(action.data)

		return "data:text/plain;base64,"+ base64Data

	}

	isPathAction(action: Action | null) 	: action is PathAction {
		if(!action) return false
		return isPathAction(action)
	}

	isHandlerAction(action: Action | null)	: action is HandlerAction {
		if(!action) return false
		return isHandlerAction(action)
	}

	isDownloadAction(action:Action | null)	: action is DownloadAction {
		if(!action) return false
		return isDownloadAction(action)
	}

	hasDescription(action: Action | null) 	: action is Action & WithDescription {
		if(!action) return false
		return 'description' in action
	}

	hasChildComponent(action: Action | null) : action is Action & WithChildComponent {
		if(!action) return false
		return 'WithChildComponent' in action
	}

	ngOnDestroy() : void {
		this.notificationSub?.unsubscribe()
	}

}