export const COMFY_CLASS = "DumasLoadImagesFolder";
export const STATE_PROP = "loadImagesFolderState";
export const HIDDEN_INPUT_NAME = "LoadImagesFolderState";

export const DEFAULT_STATE = {
  version: 1,
  folder: "",
  recursive: false,
  sort: "name",
  sort_dir: "asc",
  selected: [],
  selection_mode: "selected",
  first_n: 5,
};

export function readState(node) {
  const value = node.properties?.[STATE_PROP];
  if (typeof value === "string" && value) {
    try {
      return { ...DEFAULT_STATE, ...JSON.parse(value) };
    } catch (_error) {
      return { ...DEFAULT_STATE };
    }
  }
  return { ...DEFAULT_STATE };
}

export function writeState(node, state) {
  if (!node.properties) node.properties = {};
  node.properties[STATE_PROP] = JSON.stringify({ ...DEFAULT_STATE, ...(state || {}) });
}

export function sortFiles(files, sort, dir) {
  const ordered = [...(files || [])];
  ordered.sort((a, b) => {
    if (sort === "date") {
      const delta = (a?.mtime || 0) - (b?.mtime || 0);
      if (delta !== 0) return dir === "desc" ? -delta : delta;
    }
    const delta = String(a?.file || "").localeCompare(String(b?.file || ""), undefined, {
      numeric: true,
      sensitivity: "base",
    });
    return dir === "desc" ? -delta : delta;
  });
  return ordered;
}