import DxfArrayScanner, { IGroup } from '../DxfArrayScanner';
import * as helpers from '../ParseHelpers'
import IGeometry, { IEntity, IPoint } from './geomtry';

export interface ISplineEntity extends IEntity {
	controlPoints?: IPoint[];
	fitPoints?: IPoint[];
	startTangent: IPoint;
	endTangent: IPoint;
	knotValues: number[];
	closed: boolean;
	periodic: boolean;
	rational: boolean;
	planar: boolean;
	linear: boolean;
	degreeOfSplineCurve: number;
	numberOfKnots: number;
	numberOfControlPoints: number;
	numberOfFitPoints: number;
	normalVector: IPoint;
}

export default class Spline implements IGeometry {
	public ForEntityName = 'SPLINE' as const;
	public parseEntity(scanner: DxfArrayScanner, curr: IGroup) {
		const entity = { type: curr.value } as ISplineEntity;
		curr = scanner.next();
		while (!scanner.isEOF()) {
			if (curr.code === 0) break;

			switch (curr.code) {
				case 10:
					if (!entity.controlPoints) entity.controlPoints = [];
					entity.controlPoints.push(helpers.parsePoint(scanner));
					break;
				case 11:
					if (!entity.fitPoints) entity.fitPoints = [];
					entity.fitPoints.push(helpers.parsePoint(scanner));
					break;
				case 12:
					entity.startTangent = helpers.parsePoint(scanner);
					break;
				case 13:
					entity.endTangent = helpers.parsePoint(scanner);
					break;
				case 40:
					if (!entity.knotValues) entity.knotValues = [];
					entity.knotValues.push(curr.value as number);
					break;
				case 70:
					if (((curr.value as number) & 1) != 0) entity.closed = true;
					if (((curr.value as number) & 2) != 0) entity.periodic = true;
					if (((curr.value as number) & 4) != 0) entity.rational = true;
					if (((curr.value as number) & 8) != 0) entity.planar = true;
					if (((curr.value as number) & 16) != 0) {
						entity.planar = true;
						entity.linear = true;
					}
					break;

				case 71:
					entity.degreeOfSplineCurve = curr.value as number;
					break;
				case 72:
					entity.numberOfKnots = curr.value as number;
					break;
				case 73:
					entity.numberOfControlPoints = curr.value as number;
					break;
				case 74:
					entity.numberOfFitPoints = curr.value as number;
					break;
				case 210:
					entity.normalVector = helpers.parsePoint(scanner);
					break;
				default:
					helpers.checkCommonEntityProperties(entity, curr, scanner);
					break;
			}
			curr = scanner.next();
		}

		return entity;
	}
}