import type { ToolcraftLayer } from "../../state/types";
import {
  getToolcraftLayerById,
  isToolcraftLayerVisibleInTree,
} from "../../state/layer-visibility";

export { getToolcraftLayerById, isToolcraftLayerVisibleInTree };

export function getToolcraftLayerDepth(
  layers: readonly ToolcraftLayer[],
  layer: ToolcraftLayer,
): number {
  let depth = 0;
  let parentLayer = getToolcraftLayerById(layers, layer.parentGroupId);
  const visited = new Set<string>([layer.id]);

  while (parentLayer && !visited.has(parentLayer.id)) {
    depth += 1;
    visited.add(parentLayer.id);
    parentLayer = getToolcraftLayerById(layers, parentLayer.parentGroupId);
  }

  return depth;
}

export function isToolcraftLayerInsideGroup(
  layers: readonly ToolcraftLayer[],
  layer: ToolcraftLayer,
  groupLayerId: string,
): boolean {
  let parentLayer = getToolcraftLayerById(layers, layer.parentGroupId);
  const visited = new Set<string>([layer.id]);

  while (parentLayer && !visited.has(parentLayer.id)) {
    if (parentLayer.id === groupLayerId) {
      return true;
    }

    visited.add(parentLayer.id);
    parentLayer = getToolcraftLayerById(layers, parentLayer.parentGroupId);
  }

  return false;
}

export function isToolcraftLayerHiddenByCollapsedParent(
  layers: readonly ToolcraftLayer[],
  layer: ToolcraftLayer,
): boolean {
  let parentLayer = getToolcraftLayerById(layers, layer.parentGroupId);
  const visited = new Set<string>([layer.id]);

  while (parentLayer && !visited.has(parentLayer.id)) {
    if (parentLayer.collapsed) {
      return true;
    }

    visited.add(parentLayer.id);
    parentLayer = getToolcraftLayerById(layers, parentLayer.parentGroupId);
  }

  return false;
}

export function getToolcraftVisibleLayerRows(
  layers: readonly ToolcraftLayer[],
): ToolcraftLayer[] {
  return layers.filter((layer) => !isToolcraftLayerHiddenByCollapsedParent(layers, layer));
}