import { ElementRef } from '@angular/core';
import { ResizeModel } from './resize-model';

export class FlexGrowResizeModel implements ResizeModel {

    constructor(public FirstElements: Array<HTMLElement>,
        public SecondElements: Array<HTMLElement>,
        public IsHorizontal: boolean) {

    }

    resize(event, movingEle: ElementRef) {
        if (!this.FirstElements || !this.FirstElements[0]) return;
        if (!this.SecondElements || !this.SecondElements[0]) return;

        if (event.stopPropagation) event.stopPropagation();
        if (event.preventDefault) event.preventDefault();

        var firstEle = this.FirstElements[0];
        var secondEle = this.SecondElements[0];

        var curTotalFlexGrowAmount = parseFloat(firstEle.style['flex-grow']) + parseFloat(secondEle.style['flex-grow']);
        var isHorizontal = this.IsHorizontal;

        var eventMovementProp = isHorizontal ? "movementX" : "movementY";
        var elementOffsetSizeProp = isHorizontal ? "offsetWidth" : "offsetHeight";
        var elementOffsetProp = isHorizontal ? "offsetLeft" : "offsetTop";
        var gripperProp = isHorizontal ? "left" : "top";

        var totalSize = firstEle[elementOffsetSizeProp] + secondEle[elementOffsetSizeProp];

        var mouseMovement = this.getMouseMovement(event, movingEle); // event[eventMovementProp];

        var firstSize = firstEle[elementOffsetSizeProp] + mouseMovement;
        var secondSize = totalSize - firstSize;

        var gripperBorderSize = 5;

        for (var ele in this.FirstElements) {
            firstEle.style['flex-grow'] = Math.min(10000, Math.max(0.0, curTotalFlexGrowAmount * (firstSize / totalSize)));
        }
        for (var ele in this.SecondElements) {
            secondEle.style['flex-grow'] = Math.min(10000, Math.max(0.0, curTotalFlexGrowAmount * (secondSize / totalSize)));
        }

        return firstSize;
    }

    private getMouseMovement(event, movingEle: ElementRef): number {
        var boundingBox = movingEle.nativeElement.getBoundingClientRect();
        if (this.IsHorizontal)
            return event.clientX - boundingBox.left;
        return event.clientY - boundingBox.top;
    }

}