/* DCTS 平行集合图 sessionStorage 缓存单测（node:test，零依赖）
 *
 * 覆盖 parSets.js 的 savePsCache / restorePsCache：刷新页面后恢复数据、单槽位清理、
 * 损坏数据回退。node 无 sessionStorage，测试前用内存 Map stub。
 */

import { test } from 'node:test';
import assert from 'node:assert/strict';

// 内存 sessionStorage stub（setItem 可注入配额错误用于 QuotaExceeded 分支）
let store = new Map();
let quotaExceeded = false;
globalThis.sessionStorage = {
  get length() { return store.size; },
  key: (i) => [...store.keys()][i] ?? null,
  getItem: (k) => (store.has(k) ? store.get(k) : null),
  setItem: (k, v) => {
    if (quotaExceeded) throw new Error('QuotaExceededError');
    store.set(k, String(v));
  },
  removeItem: (k) => { store.delete(k); },
};

const { savePsCache, restorePsCache } = await import('../src/views/detail/parSets.js');

function ctx(name, points = [], ts = null) {
  return { name, psState: { points, ts } };
}

test('savePsCache 写入 JSON 并可由 restorePsCache 恢复', () => {
  store.clear();
  const before = Date.now();
  const c = ctx('sdB_cno', [{ name: 'p1', teff: 20000, status: 'completed' }]);
  savePsCache(c);

  // 持久化 key 存在
  assert.ok(store.has('dcts_ps_points_sdB_cno'));
  // 恢复后 points 一致；快照时间由 savePsCache 记录为保存时刻（Date.now 附近）
  const c2 = ctx('sdB_cno');
  assert.equal(restorePsCache(c2), true);
  assert.deepEqual(c2.psState.points, c.psState.points);
  assert.ok(Number.isFinite(c2.psState.ts) && c2.psState.ts >= before);
  assert.ok(Math.abs(c2.psState.ts - Date.now()) < 5000);
});

test('多工作流缓存并存：切换工作流不删除彼此的缓存', () => {
  store.clear();
  savePsCache(ctx('wf_a', [{ name: 'a' }]));
  savePsCache(ctx('wf_b', [{ name: 'b' }]));
  savePsCache(ctx('wf_a', [{ name: 'a2' }])); // 再回 wf_a 更新，writes 覆盖自身 key

  // wf_a 与 wf_b 的缓存都保留
  assert.ok(store.has('dcts_ps_points_wf_a'));
  assert.ok(store.has('dcts_ps_points_wf_b'));

  // 各自恢复出各自的数据（不串）
  const ca = ctx('wf_a');
  const cb = ctx('wf_b');
  assert.equal(restorePsCache(ca), true);
  assert.equal(restorePsCache(cb), true);
  assert.deepEqual(ca.psState.points, [{ name: 'a2' }]); // 更新后是最新值
  assert.deepEqual(cb.psState.points, [{ name: 'b' }]);
});

test('无缓存 / 空 key 时 restorePsCache 返回 false', () => {
  store.clear();
  const c = ctx('no_such_wf');
  assert.equal(restorePsCache(c), false);
  assert.deepEqual(c.psState.points, []);
});

test('损坏的 JSON / 非数组数据返回 false（降级为重新拉取）', () => {
  store.clear();
  store.set('dcts_ps_points_bad_json', 'not-json{{{');
  store.set('dcts_ps_points_bad_shape', JSON.stringify({ foo: 1 }));
  assert.equal(restorePsCache(ctx('bad_json')), false);
  assert.equal(restorePsCache(ctx('bad_shape')), false);
});

test('QuotaExceeded 时 savePsCache 静默失败，不抛错', () => {
  store.clear();
  quotaExceeded = true;
  assert.doesNotThrow(() => savePsCache(ctx('big_wf', new Array(10000).fill({ x: 1 }))));
  quotaExceeded = false;
});