// Internal Imports
import { PieChartModel } from '../model-pie';
import { Chart } from '../chart';
import * as Configuration from '../configuration';
import { ChartConfig, PieChartOptions } from '../interfaces/index';
import { Tools } from '../tools';
import { Skeletons } from '../interfaces/enums';

// Components
import {
	Pie,
	// the imports below are needed because of typescript bug (error TS4029)
	Legend,
	LayoutComponent,
	Skeleton,
} from '../components/index';

export class PieChart extends Chart {
	model = new PieChartModel(this.services);

	// TODO - Optimize the use of "extending"
	constructor(
		holder: Element,
		chartConfigs: ChartConfig<PieChartOptions>,
		extending = false
	) {
		super(holder, chartConfigs);

		// TODO - Optimize the use of "extending"
		if (extending) {
			return;
		}

		// Merge the default options for this chart
		// With the user provided options
		this.model.setOptions(
			Tools.mergeDefaultChartOptions(
				Configuration.options.pieChart,
				chartConfigs.options
			)
		);

		// Initialize data, services, components etc.
		this.init(holder, chartConfigs);
	}

	getComponents() {
		// Specify what to render inside the graph-frame
		const graphFrameComponents: any[] = [
			new Pie(this.model, this.services),
			new Skeleton(this.model, this.services, {
				skeleton: Skeletons.PIE,
			}),
		];

		// get the base chart components and export with tooltip
		const components: any[] = this.getChartComponents(graphFrameComponents);
		return components;
	}
}