'use strict';

const test = require('node:test');
const assert = require('node:assert/strict');

const {
  buildAlertSignature,
  buildMkhReplenishNotification,
  buildNotifiedSnapshot,
  chinaDateKey,
  diffAlertState,
  formatQty,
} = require('../src/jobs/mkhReplenishAlertJob');

const alert = (skuId, level = '缺货', extra = {}) => ({
  skuId,
  warningLevel: level,
  productName: `商品 ${skuId}`,
  dailySale: 1,
  stock: 0,
  replenishQty: 3,
  ...extra,
});

test('diffAlertState splits fresh / persisted / restored', () => {
  const state = { notified: { A: { level: '缺货' }, B: { level: '预警' }, Z: { level: '缺货' } } };
  const { fresh, persisted, restored } = diffAlertState([alert('A'), alert('B'), alert('C')], state);

  assert.deepEqual(fresh.map((r) => r.skuId), ['C']);
  assert.deepEqual(persisted.map((r) => r.skuId), ['A', 'B']);
  // Z 已补货恢复，应从已推送记录里剔除
  assert.deepEqual(restored, ['Z']);
});

test('diffAlertState treats empty state as all fresh', () => {
  const { fresh, persisted, restored } = diffAlertState([alert('A'), alert('B')], {});
  assert.equal(fresh.length, 2);
  assert.equal(persisted.length, 0);
  assert.deepEqual(restored, []);
});

test('buildNotifiedSnapshot keeps firstNotifiedAt and drops restored skus', () => {
  const state = { notified: { A: { firstNotifiedAt: '2026-09-01T01:00:00.000Z', lastNotifiedAt: '2026-09-01T01:00:00.000Z' } } };
  const next = buildNotifiedSnapshot([alert('A'), alert('B')], state, '2026-09-17T01:00:00.000Z');

  assert.deepEqual(Object.keys(next).sort(), ['A', 'B']);
  assert.equal(next.A.firstNotifiedAt, '2026-09-01T01:00:00.000Z');
  assert.equal(next.A.lastNotifiedAt, '2026-09-17T01:00:00.000Z');
  assert.equal(next.B.firstNotifiedAt, '2026-09-17T01:00:00.000Z');
});

test('buildNotifiedSnapshot with touch=false does not refresh lastNotifiedAt', () => {
  const state = { notified: { A: { firstNotifiedAt: '2026-09-01T01:00:00.000Z', lastNotifiedAt: '2026-09-05T01:00:00.000Z' } } };
  const next = buildNotifiedSnapshot([alert('A')], state, '2026-09-17T01:00:00.000Z', { touch: false });
  assert.equal(next.A.lastNotifiedAt, '2026-09-05T01:00:00.000Z');
});

test('buildAlertSignature is order independent but content sensitive', () => {
  const a = alert('A');
  const b = alert('B', '预警');
  assert.equal(buildAlertSignature([a, b]), buildAlertSignature([b, a]));
  assert.notEqual(buildAlertSignature([a, b]), buildAlertSignature([a]));
  // 等级变化也算变化（缺货 → 预警 应产生新指纹）
  assert.notEqual(buildAlertSignature([alert('A', '缺货')]), buildAlertSignature([alert('A', '预警')]));
});

test('chinaDateKey renders Beijing date regardless of UTC offset', () => {
  // 2026-09-16T17:30:00Z === 2026-09-17 01:30 (北京) → 跨日必须算 09-17
  assert.equal(chinaDateKey(new Date('2026-09-16T17:30:00Z')), '20260917');
  assert.equal(chinaDateKey(new Date('2026-09-16T01:00:00Z')), '20260916');
});

test('formatQty trims trailing zeros and tolerates bad input', () => {
  assert.equal(formatQty(3), '3');
  assert.equal(formatQty(2.9700000001), '2.97');
  assert.equal(formatQty(0.28), '0.28');
  assert.equal(formatQty(null), '—');
  assert.equal(formatQty('abc'), '—');
});

test('notification carries recipient, idempotency key and shortfall details', () => {
  const fresh = [alert('MKHDNZ0409260700428', '缺货', { dailySale: 2.97, replenishQty: 9 })];
  const all = [...fresh, alert('MKHDNZ0409260700486', '预警', { dailySale: 2, stock: 1, replenishQty: 5 })];
  const snapshot = {
    monitorDate: '2026-09-16',
    saleWindowDays: 15,
    replenishDaysThreshold: 3,
    outOfStockCount: 1,
    warningOnlyCount: 1,
    replenishQtyTotal: 14,
  };

  const payload = buildMkhReplenishNotification({
    alerts: fresh,
    allAlerts: all,
    snapshot,
    recipientAlias: '苏适',
    dateKey: '20260917',
  });

  assert.equal(payload.recipientAlias, '苏适');
  assert.equal(payload.idempotencyKey, `mkh_replenish_alert:苏适:20260917:${buildAlertSignature(fresh)}:v1`);
  assert.ok(payload.title.includes('新增 1 个'));
  assert.ok(payload.title.includes('含 1 个已缺货'));
  assert.ok(payload.content.includes('MKHDNZ0409260700428'));
  assert.ok(payload.content.includes('现有库存 0'));
  assert.ok(payload.content.includes('建议补货 9'));
  // 汇总用全量口径，不是本批新增
  assert.ok(payload.content.includes('当前共 **2** 个'));
  assert.equal(payload.actionTitle, '查看补货清单');
  assert.ok(payload.content.length <= 4800);
});

test('notification truncates long lists but keeps the totals', () => {
  const many = Array.from({ length: 40 }, (_, i) => alert(`MKH${String(i).padStart(4, '0')}`));
  const payload = buildMkhReplenishNotification({
    alerts: many,
    allAlerts: many,
    snapshot: { outOfStockCount: 40, warningOnlyCount: 0, replenishQtyTotal: 120 },
    recipientAlias: '苏适',
    dateKey: '20260917',
  });

  assert.ok(payload.content.includes('仅列出前 20 个'));
  assert.ok(payload.content.includes('当前共 **40** 个'));
  assert.equal(payload.content.includes('MKH0039'), false);
  assert.ok(payload.content.length <= 4800);
});

test('notification flags degraded work-order source', () => {
  const payload = buildMkhReplenishNotification({
    alerts: [alert('A')],
    allAlerts: [alert('A')],
    snapshot: { outOfStockCount: 1, warningOnlyCount: 0, replenishQtyTotal: 3, workOrderDegraded: true },
    recipientAlias: '苏适',
    dateKey: '20260917',
  });
  assert.ok(payload.content.includes('加工单数据源暂不可用'));
});

// ── 配件不足（见 mkhBomService 文件头 ⑪）──────────────────────────
test('notification spells out 配件不足 and drops the replenish target', () => {
  const shortage = alert('MKHDNZ0409260600843', '缺货', {
    dailySale: 0,
    stock: 0,
    replenishQty: 1,
    componentShortage: true,
    assemblableQty: 0,
    bottleneckComponents: [
      { code: 'DNZ040958N1440V01', name: '白架通用前拉杆', perQty: 1, stock: 0, occupied: 0, available: 0, can: 0 },
      { code: 'DNZ041106B01V01', name: '通用小K', perQty: 1, stock: 23, occupied: 0, available: 23, can: 23 },
    ],
  });

  const payload = buildMkhReplenishNotification({
    alerts: [shortage],
    allAlerts: [shortage],
    snapshot: {
      outOfStockCount: 1,
      warningOnlyCount: 0,
      replenishQtyTotal: 1,
      componentShortageCount: 1,
    },
    recipientAlias: '苏适',
    dateKey: '20260917',
  });

  assert.ok(payload.content.includes('配件不足，无法补货'));
  // 补不出来的商品不再给补货数字，避免业务照着一个补不到的目标去采购
  assert.ok(payload.content.includes('建议补货 —'));
  assert.equal(payload.content.includes('建议补货 1'), false);
  // 只列真正卡住的短板（可支配数 ≤ 0），库存充足的不列
  assert.ok(payload.content.includes('DNZ040958N1440V01'));
  assert.equal(payload.content.includes('DNZ041106B01V01'), false);
  // 汇总段说明本批里有几个配件不足
  assert.ok(payload.content.includes('因**配件库存不足**'));
});

test('notification flags degraded component stock source', () => {
  const payload = buildMkhReplenishNotification({
    alerts: [alert('A')],
    allAlerts: [alert('A')],
    snapshot: {
      outOfStockCount: 1,
      warningOnlyCount: 0,
      replenishQtyTotal: 3,
      componentStockDegraded: true,
    },
    recipientAlias: '苏适',
    dateKey: '20260917',
  });
  assert.ok(payload.content.includes('配件库存数据源暂不可用'));
  assert.ok(payload.content.includes('未做'));
});