import { Position, type PositionProp, PositionValues } from '@/components/controls/position.enum';
import { usePositionWatcher } from '@/composable/usePositionWatcher';
import { isInitializedSymbol, mapSymbol } from '@/types';
import type { ControlPosition, IControl } from 'maplibre-gl';
import { createCommentVNode, defineComponent, h, inject, nextTick, onBeforeUnmount, type PropType, ref, type Ref, type SlotsType, Teleport, watch } from 'vue';


export class CustomControl implements IControl {

	public static readonly CONTROL_CLASS       = 'maplibregl-ctrl';
	public static readonly CONTROL_GROUP_CLASS = 'maplibregl-ctrl-group';

	public readonly container: HTMLDivElement;

	constructor(private isAdded: Ref<boolean>, noClasses: boolean) {
		this.container = document.createElement('div');
		this.setClasses(noClasses);
	}

	getDefaultPosition(): ControlPosition {
		return Position.TOP_LEFT;
	}

	onAdd(): HTMLElement {
		nextTick(() => this.isAdded.value = true);
		return this.container;
	}

	onRemove(): void {
		this.isAdded.value = false;
		this.container.remove();
	}

	setClasses(noClasses: boolean) {
		if (noClasses) {
			this.container.classList.remove(CustomControl.CONTROL_CLASS);
			this.container.classList.remove(CustomControl.CONTROL_GROUP_CLASS);
		} else {
			this.container.classList.add(CustomControl.CONTROL_CLASS);
			this.container.classList.add(CustomControl.CONTROL_GROUP_CLASS);
		}
	}

}

export default /*#__PURE__*/ defineComponent({
	name : 'MglCustomControl',
	props: {
		position : {
			type     : String as PropType<PositionProp>,
			validator: (v: Position) => {
				return PositionValues.indexOf(v) !== -1;
			}
		},
		noClasses: {
			type   : Boolean as PropType<boolean>,
			default: false
		}
	},
	slots: Object as SlotsType<{ default: {} }>,
	setup(props, { slots }) {

		const map           = inject(mapSymbol)!,
			  isInitialized = inject(isInitializedSymbol)!,
			  isAdded       = ref(false),
			  control       = new CustomControl(isAdded, props.noClasses!);

		usePositionWatcher(() => props.position, map, control);
		watch(() => props.noClasses, v => control.setClasses(v!));
		onBeforeUnmount(() => isInitialized.value && map.value?.removeControl(control));

		return () => {
			if (!isAdded.value) {
				return createCommentVNode('custom-component');
			}
			return h(
				Teleport as any,
				{ to: control.container },
				slots.default?.({})
			);
		};

	}
});