import * as au from "../aurelia";

@au.customElement("md-collection")
@au.autoinject
export class MdCollection {
	constructor(private element: Element) { }

	anchor: HTMLDivElement;

	attached() {
		const header = this.element.querySelector("md-collection-header");
		if (header) {
			this.anchor.classList.add("with-header");
		}
	}

	getSelected() {
		const items = Array.from(this.element.querySelectorAll("md-collection-selector"));
		return items.filter(i => i.au["md-collection-selector"].viewModel.isSelected)
			.map(i => i.au["md-collection-selector"].viewModel.item);
	}

	clearSelection() {
		const items = [].slice.call(this.element.querySelectorAll("md-collection-selector"));
		items.forEach(i => i.au["md-collection-selector"].viewModel.isSelected = false);
	}

	selectAll() {
		const items = [].slice.call(this.element.querySelectorAll("md-collection-selector"));
		items.forEach(i => {
			const vm = i.au["md-collection-selector"].viewModel;
			vm.isSelected = !vm.mdDisabled;
		});
	}

	toggleIndex(index) {
		const items = [].slice.call(this.element.querySelectorAll("md-collection-selector"));
		const vm = items[index].au["md-collection-selector"].viewModel;
		vm.isSelected = !vm.isSelected;
	}
}