'use strict';

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

const {
  buildGradeCase,
  buildInClause,
  fetchGradeRows,
  fetchZeroSaleSkuRows,
} = require('../src/services/stockSalesAnalysis');
const { SALES_GRADE_RULES } = require('../src/config/stockSalesAnalysis');

test('buildInClause 按位展开仓库参数', () => {
  const { clause, params } = buildInClause([101, 102], 'w');
  assert.equal(clause, '@w0,@w1');
  assert.deepEqual(params, { w0: 101, w1: 102 });
});

test('buildGradeCase 覆盖全部正向等级，并以销售=0 兜底', () => {
  const expr = buildGradeCase();
  SALES_GRADE_RULES.filter((rule) => rule.lower > 0).forEach((rule) => {
    assert.ok(expr.includes(`THEN '${rule.key}'`), `${rule.key} 未出现在分档表达式中`);
  });
  assert.ok(expr.includes("THEN 'slow2'"));
  assert.ok(expr.includes("ELSE 'zero'"));
});

test('fetchGradeRows 首参不是数据库实例时抛错，避免静默返回空数组', async () => {
  await assert.rejects(
    () => fetchGradeRows({}, [101], { shipFrom: 'a', shipTo: 'b', days: 30 }),
    TypeError
  );
});

test('fetchGradeRows 无仓库或缺失窗口时直接返回空结果', async () => {
  let called = 0;
  const db = { query: async () => { called += 1; return []; } };
  assert.deepEqual(await fetchGradeRows(db, [], { shipFrom: 'a', shipTo: 'b', days: 30 }), []);
  assert.deepEqual(await fetchGradeRows(db, [101], { shipFrom: null, shipTo: 'b', days: 30 }), []);
  assert.equal(called, 0);
});

test('fetchGradeRows 把仓库参数与窗口参数一并传给业务库', async () => {
  let captured = null;
  const db = {
    query: async (sqlText, params) => {
      captured = { sqlText, params };
      return [
        { wmsCoId: 101, gradeKey: 'hot', skuCount: 2, stockQty: 438, salesQty: 1136, dailySales: 37.87 },
      ];
    },
  };

  const rows = await fetchGradeRows(db, [101, 102], {
    shipFrom: '2026-08-28 01:00:00',
    shipTo: '2026-09-27 01:00:00',
    days: 30,
  });

  assert.equal(rows.length, 1);
  assert.equal(rows[0].wmsCoId, '101');
  assert.equal(rows[0].stockQty, 438);

  assert.equal(captured.params.w0, 101);
  assert.equal(captured.params.w1, 102);
  assert.equal(captured.params.v0, 101);
  assert.equal(captured.params.days, 30);
  assert.equal(captured.params.shipFrom, '2026-08-28 01:00:00');
  assert.equal(captured.params.shipTo, '2026-09-27 01:00:00');
  assert.ok(captured.sqlText.includes('@days'));
  assert.ok(captured.sqlText.includes('rpt.jst_inventoryInfo'));
  assert.ok(captured.sqlText.includes('rpt.jst_OrderItem'));
});

test('fetchZeroSaleSkuRows 首参不是数据库实例时抛错，避免静默返回空数组', async () => {
  await assert.rejects(
    () => fetchZeroSaleSkuRows({}, [101], { shipFrom: 'a', shipTo: 'b', days: 30 }),
    TypeError
  );
});

test('fetchZeroSaleSkuRows 无仓库或缺失窗口时直接返回空结果', async () => {
  let called = 0;
  const db = { query: async () => { called += 1; return []; } };
  assert.deepEqual(await fetchZeroSaleSkuRows(db, [], { shipFrom: 'a', shipTo: 'b', days: 30 }), []);
  assert.deepEqual(await fetchZeroSaleSkuRows(db, [101], { shipFrom: 'a', shipTo: null, days: 30 }), []);
  assert.equal(called, 0);
});

test('fetchZeroSaleSkuRows 复用同一分档口径并关联 SKU 名称', async () => {
  let captured = null;
  const db = {
    query: async (sqlText, params) => {
      captured = { sqlText, params };
      return [
        { wmsCoId: 101, skuId: 'SKU-A', skuName: '款式A', binName: 'A01-01-1', stockQty: 7, salesQty: 0 },
        { wmsCoId: 101, skuId: 'SKU-A', skuName: '款式A', binName: 'A02-03-1', stockQty: 5, salesQty: 0 },
        { wmsCoId: 101, skuId: 'SKU-B', skuName: '款式B', binName: null, stockQty: 3, salesQty: 0 },
      ];
    },
  };

  const rows = await fetchZeroSaleSkuRows(db, [101, 102], {
    shipFrom: '2026-08-28 01:00:00',
    shipTo: '2026-09-27 01:00:00',
    days: 30,
  });

  // 每个仓位独立一行；无仓位的 SKU 保留一行（仓位为空、库存取总库存）
  assert.equal(rows.length, 3);
  assert.equal(rows[0].wmsCoId, '101');
  assert.equal(rows[0].skuName, '款式A');
  assert.equal(rows[0].binName, 'A01-01-1');
  assert.equal(rows[0].stockQty, 7);
  assert.equal(rows[1].binName, 'A02-03-1');
  assert.equal(rows[1].stockQty, 5);
  assert.equal(rows[2].binName, '');
  assert.equal(rows[2].stockQty, 3);

  // 口径必须与 fetchGradeRows 一致：同一段 gradeCase 表达式 + 同样的「有库存或有销量」过滤
  assert.ok(captured.sqlText.includes("ELSE 'zero'"));
  assert.ok(captured.sqlText.includes("g.gradeKey = 'zero'"));
  assert.ok(captured.sqlText.includes('rpt.jst_sku'));
  assert.ok(captured.sqlText.includes("NOT IN ('Delete', 'Cancelled')"));
  assert.equal(captured.params.w0, 101);
  assert.equal(captured.params.days, 30);

  // 系统仓位：来自 rpt.jst_packInventoryInfo，按「仓库+SKU+仓位」聚合出仓位级库存，
  // 每仓位一行（COALESCE 兜底无仓位 SKU 取总库存），排除无仓位与零库存记录
  assert.ok(captured.sqlText.includes('rpt.jst_packInventoryInfo'));
  assert.ok(captured.sqlText.includes('COALESCE(bn.binQty, g.stockQty)'));
  assert.ok(captured.sqlText.includes('binName'));
});

test('fetchZeroSaleSkuRows 的仓位必须按同一仓库匹配，避免跨仓错配', async () => {
  let captured = null;
  const db = {
    query: async (sqlText) => {
      captured = sqlText;
      return [];
    },
  };
  await fetchZeroSaleSkuRows(db, [101], {
    shipFrom: '2026-08-28 01:00:00', shipTo: '2026-09-27 01:00:00', days: 30,
  });
  assert.ok(captured.includes('bn.wmsCoId = g.wmsCoId AND bn.skuId = g.skuId'));
  assert.ok(captured.includes("ISNULL(p.qty, 0) <> 0"));
});