import { equivalentStrokes } from '../types/util'
import { defaults } from '../types/util';

export interface LinkStyle {
    stroke?: string
    strokeDash?: number[]
    strokeWidth?: number
}

function applyLinkStyleAttributes (target: LinkStyle, source: LinkStyle): void {

    defaults(target, source, ['stroke', 'strokeDash', 'strokeWidth']);

}

function cloneLinkStyle (style: LinkStyle): LinkStyle {

    const clone = {};
    applyLinkStyleAttributes(clone, style);
    return clone;
}

function equivalentLinkStyles (a: LinkStyle, b: LinkStyle): boolean {

    return a.stroke === b.stroke
        && equivalentStrokes(a.strokeDash, b.strokeDash)
        && a.strokeWidth === b.strokeWidth;

}



export {
    applyLinkStyleAttributes,
    cloneLinkStyle,
    equivalentLinkStyles
}