/**
 * 标签模板 LocalStorage 读写
 * Key: label-template-{id}
 * 列表: label-template-ids = string[]
 */

import type { LabelTemplate } from '../types/labelTemplate';
import { getStorageKey, getIdsKey } from '../types/labelTemplate';

export function getTemplateIds(): string[] {
  try {
    const raw = localStorage.getItem(getIdsKey());
    if (!raw) return [];
    const ids = JSON.parse(raw) as string[];
    return Array.isArray(ids) ? ids : [];
  } catch {
    return [];
  }
}

export function getTemplate(id: string): LabelTemplate | null {
  try {
    const raw = localStorage.getItem(getStorageKey(id));
    if (!raw) return null;
    return JSON.parse(raw) as LabelTemplate;
  } catch {
    return null;
  }
}

export function getTemplateList(): LabelTemplate[] {
  const ids = getTemplateIds();
  const list: LabelTemplate[] = [];
  for (const id of ids) {
    const t = getTemplate(id);
    if (t) list.push(t);
  }
  return list.sort((a, b) => (b.id > a.id ? 1 : -1));
}

function setTemplateIds(ids: string[]): void {
  localStorage.setItem(getIdsKey(), JSON.stringify(ids));
}

export function saveTemplate(template: LabelTemplate): void {
  const key = getStorageKey(template.id);
  localStorage.setItem(key, JSON.stringify(template));
  const ids = getTemplateIds();
  if (!ids.includes(template.id)) {
    ids.push(template.id);
    setTemplateIds(ids);
  }
}

export function deleteTemplate(id: string): void {
  localStorage.removeItem(getStorageKey(id));
  const ids = getTemplateIds().filter((x) => x !== id);
  setTemplateIds(ids);
}