import { ModuleWithProviders, NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { BzThemeService } from './theme.service';
import { BzThemeConfig, THEME_CONFIG } from './theme.config';

@NgModule({
  declarations: [],
  imports: [
    CommonModule
  ]
})
export class BzThemeModule { 
  static forChild(theme?: BzThemeConfig): ModuleWithProviders<BzThemeModule> {
    return BzThemeModule._setProvider(theme);
  }

  static forRoot(theme?: BzThemeConfig): ModuleWithProviders<BzThemeModule> {
    return BzThemeModule._setProvider(theme);
  }

  /**
   * Set provider.
   * 
   * @author Federico Gambardella<fedega86@libero.it>
   * @param {BzThemeConfig} config 
   */
   static _setProvider(theme?: BzThemeConfig): ModuleWithProviders<BzThemeModule> {
    return {
      ngModule:  BzThemeModule,
      providers: [BzThemeService,
        { provide: THEME_CONFIG, useValue: theme }]
    };
  }
}