// 设备品牌管理 - 本地假数据 API（使用 localStorage 持久化）

const STORAGE_KEY = 'EQUIPMENT_BRANDS';

function readStore() {
  try {
    const raw = localStorage.getItem(STORAGE_KEY);
    if (raw) {
      const parsed = JSON.parse(raw);
      if (Array.isArray(parsed)) return parsed;
    }
  } catch (e) {
    // ignore
  }
  // 初始化一些示例数据
  const initial = [
    { id: 1, name: '西门子', country: '德国', description: '工业自动化与电气工程品牌', createdAt: Date.now() - 86400000 * 10 },
    { id: 2, name: '施耐德', country: '法国', description: '能源管理与自动化', createdAt: Date.now() - 86400000 * 7 },
    { id: 3, name: '三菱电机', country: '日本', description: '电气与自动化设备', createdAt: Date.now() - 86400000 * 3 },
  ];
  localStorage.setItem(STORAGE_KEY, JSON.stringify(initial));
  return initial;
}

function writeStore(list) {
  localStorage.setItem(STORAGE_KEY, JSON.stringify(list));
}

function nextId(list) {
  const maxId = list.reduce((max, item) => Math.max(max, Number(item.id) || 0), 0);
  return maxId + 1;
}

export function getBrandPage(params = {}) {
  const { current = 1, size = 10, name } = params;
  const list = readStore();
  let filtered = list;
  if (name) {
    const kw = String(name).trim();
    filtered = filtered.filter((b) =>
      (b.name && b.name.includes(kw)) || (b.country && b.country.includes(kw))
    );
  }
  const start = (current - 1) * size;
  const end = start + Number(size);
  const records = filtered.slice(start, end);
  return Promise.resolve({
    code: 200,
    data: {
      total: filtered.length,
      records,
    },
    msg: 'ok',
  });
}

export function getBrandById(id) {
  const list = readStore();
  const item = list.find((i) => String(i.id) === String(id));
  return Promise.resolve({ code: 200, data: item || null, msg: 'ok' });
}

export function addBrand(data) {
  const list = readStore();
  const item = { ...data };
  item.id = nextId(list);
  item.createdAt = Date.now();
  list.unshift(item);
  writeStore(list);
  return Promise.resolve({ code: 200, data: item, msg: '新增成功' });
}

export function editBrand(data) {
  const list = readStore();
  const index = list.findIndex((i) => String(i.id) === String(data.id));
  if (index !== -1) {
    list[index] = { ...list[index], ...data };
    writeStore(list);
    return Promise.resolve({ code: 200, data: list[index], msg: '修改成功' });
  }
  return Promise.resolve({ code: 404, data: null, msg: '未找到该品牌' });
}

export function delBrand(idOrIds) {
  const list = readStore();
  const ids = Array.isArray(idOrIds) ? idOrIds.map(String) : [String(idOrIds)];
  const newList = list.filter((i) => !ids.includes(String(i.id)));
  writeStore(newList);
  return Promise.resolve({ code: 200, data: null, msg: '删除成功' });
}