import { Link } from '../../renderables/Link';
import { LinkStyle } from '../../styles/LinkStyle';
import { Renderer } from '../Renderer';

abstract class LinkRenderer extends Renderer {

    // Links to render
    protected _links: Link[];

    // Styling
    stroke: string;
    strokeDash: number[] | null;
    strokeWidth: number | null;

    protected constructor (style?: LinkStyle) {

        super();

        this._links = [];
        this.stroke = '#333333';
        this.strokeDash = null;
        this.strokeWidth = null;

        if (style) {
            if (style.stroke) this.stroke = style.stroke;
            if (style.strokeDash) this.strokeDash = style.strokeDash;
            if (style.strokeWidth) this.strokeWidth = style.strokeWidth;
        }

    }

    links (): Link[];
    links (links: Link[]): this;
    links (links?: Link[]): Link[] | this {
        return arguments.length
            ? (this._links = links!, this)
            : this._links;
    }

    protected _doFill (context: CanvasRenderingContext2D) {

        if (this.stroke) context.fillStyle = this.stroke;
        context.fill();

    }

    protected _doStroke (context: CanvasRenderingContext2D) {

        if (this.strokeDash) context.setLineDash(this.strokeDash);
        if (this.strokeWidth) context.lineWidth = this.strokeWidth;
        context.strokeStyle = this.stroke;
        context.stroke();

    }

}

export {
    LinkRenderer
}