'use strict';

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

const {
  AVAILABLE_FLOW_FIELDS,
  buildInClause,
  fetchFlows,
} = require('../src/services/dailyInventoryFlows');
const { deriveAndStoreOpeningSnapshot } = require('../src/services/dailyInventoryOpening');

const BASELINE = [
  { warehouse: '仓A主仓', dbWarehouse: '仓A', wmsCoId: 101 },
  { warehouse: '仓B主仓', dbWarehouse: '仓B', wmsCoId: 102 },
  { warehouse: '仓C主仓', dbWarehouse: null, wmsCoId: 103 },
];

/** 构造一个按 SQL 关键字路由的假业务库 */
function fakeCloudDb(handler) {
  return { query: async (sql, params) => handler(String(sql), params || {}) };
}

test('buildInClause 展开参数且不为 async', () => {
  const { clause, params } = buildInClause([1, 2], 'w');
  assert.equal(clause, '@w0,@w1');
  assert.deepEqual(params, { w0: 1, w1: 2 });
});

test('fetchFlows 查询四类单据并按符号约定返回（流入正、流出负）', async () => {
  const seen = [];
  const db = fakeCloudDb((sql, params) => {
    seen.push(sql);
    if (sql.includes('jst_purchaseItem')) return [{ wmsCoId: 101, qty: '100' }];
    if (sql.includes('jst_purchaseoutItem')) return [{ wmsCoId: 101, qty: '30' }];
    if (sql.includes('jst_OrderItem')) return [{ wmsCoId: 101, qty: '50' }];
    if (sql.includes('jst_returnAndRefundItem')) return [{ wmsCoId: 101, qty: '8' }];
    return [];
  });
  const map = await fetchFlows(db, [101, 102], '2026-09-26 01:00:00');
  const f = map.get('101');
  assert.equal(f.purchaseIn, 100, '采购进仓为流入正数');
  assert.equal(f.purchaseReturn, -30, '采购退货为流出负数');
  assert.equal(f.salesOut, -50, '销售出仓为流出负数');
  assert.equal(f.salesReturn, 8, '销售退货为流入正数');
  assert.equal(seen.length, 4, '应发出 4 条单据查询');
  assert.ok(seen.every((s) => s.includes('@from')), '每条查询都带 @from 参数');
  assert.deepEqual(AVAILABLE_FLOW_FIELDS.sort(), ['purchaseIn', 'purchaseReturn', 'salesOut', 'salesReturn']);
});

test('fetchFlows 空仓库列表直接返回空 Map', async () => {
  const map = await fetchFlows(fakeCloudDb(() => []), [], '2026-09-26 01:00:00');
  assert.equal(map.size, 0);
});

test('deriveAndStoreOpeningSnapshot：全部仓库用实时库存扣流水回推，并保留基线仓库名', async () => {
  const upserts = [];
  const cloudDb = fakeCloudDb((sql, params) => {
    if (sql.includes('jst_inventoryInfo')) {
      return [
        { wmsCoId: 101, qty: '520', skuCount: '13' },
        { wmsCoId: 102, qty: '300', skuCount: '9' },
        { wmsCoId: 103, qty: '10', skuCount: '2' },
      ];
    }
    if (sql.includes('jst_purchaseItem')) return [{ wmsCoId: 102, qty: '60' }];
    if (sql.includes('jst_purchaseoutItem')) return [{ wmsCoId: 102, qty: '10' }];
    if (sql.includes('jst_OrderItem')) return [{ wmsCoId: 102, qty: '40' }];
    if (sql.includes('jst_returnAndRefundItem')) return [];
    return [];
  });
  const snapshotDb = {
    async upsertSnapshot(bizDate, rows) {
      upserts.push({ bizDate, rows });
      return rows.length;
    },
  };

  const result = await deriveAndStoreOpeningSnapshot({
    cloudDb,
    snapshotDb,
    baseline: BASELINE,
    openingDate: '2026-09-25',
    latestBizDate: '2026-09-26',
    takenAt: null,
  });

  assert.equal(result.count, 3);
  assert.equal(result.derivedCount, 3);
  assert.equal(upserts.length, 1);
  assert.equal(upserts[0].bizDate, '2026-09-25');

  const byWh = new Map(upserts[0].rows.map((r) => [r.wmsCoId, r]));
  // 仓A：无流水 → 等于实时库存 520
  assert.equal(byWh.get(101).closingQty, 520);
  // 仓B：300 − 净流入(60 − 10 − 40) = 300 − 10 = 290
  assert.equal(byWh.get(102).closingQty, 290);
  // 仓C：无流水 → 等于实时库存 10
  assert.equal(byWh.get(103).closingQty, 10);
  // 带回基线仓库名，保证后续按 wmsCoId 读取正确
  assert.equal(byWh.get(102).warehouse, '仓B主仓');
  assert.equal(byWh.get(102).dbWarehouse, '仓B');
});

test('fetchFlows 缺少数据库实例参数时立即抛错（防静默空结果）', async () => {
  await assert.rejects(
    () => fetchFlows([101, 102], '2026-09-26 01:00:00'),
    /第一个参数必须是数据库实例/
  );
});