import { ModuleWithProviders, NgModule, Optional } from '@angular/core';
import { FullPageLoadingIndicatorComponent } from './full-page-loading-indicator/full-page-loading-indicator.component';
import { ProgressLoadingComponent } from './progress-loading/progress-loading.component';
import { LoadingService } from './loading.service';
import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
import { CommonModule } from '@angular/common';
import { MatProgressBarModule } from '@angular/material/progress-bar';
import { ProgressBarComponent } from './progress-bar/progress-bar.component';
import { MatIconModule } from '@angular/material/icon';
import { TranslateModule } from '@ngx-translate/core';

const components = [FullPageLoadingIndicatorComponent, ProgressLoadingComponent, ProgressBarComponent];

@NgModule({
    declarations: components,
    exports: components,
    imports: [MatProgressSpinnerModule, CommonModule, MatProgressBarModule, MatIconModule, TranslateModule],
})
export class IqserLoadingModule {
    constructor(@Optional() loadingService: LoadingService) {
        if (!loadingService) {
            throw new Error('Call forRoot() in AppModule to use IqserLoadingModule');
        }
    }

    static forRoot(): ModuleWithProviders<IqserLoadingModule> {
        return {
            ngModule: IqserLoadingModule,
            providers: [LoadingService],
        };
    }
}