import { describe, expect, it } from 'vitest';
import {
  formatWecomReportMarkdown,
  wecomReportCutoff,
  wecomReportDueAt,
  wecomReportPeriod,
  wecomReportShouldFire,
} from './wecom-report';

const emptyStats = {
  usersTotal: 10,
  usersIncrement: 2,
  partnersTotal: 3,
  partnersIncrement: 1,
  storesTotal: 4,
  storesIncrement: 0,
  ordersTotal: 20,
  ordersIncrement: 5,
  orderAmountTotal: 1000,
  orderAmountIncrement: 80.5,
  redeemsTotal: 8,
  redeemsIncrement: 3,
  redeemAmountTotal: 200,
  redeemAmountIncrement: 40,
};

describe('wecomReportPeriod', () => {
  it('daily is the Shanghai calendar day', () => {
    const p = wecomReportPeriod('daily', new Date('2026-09-02T20:00:00+08:00'));
    expect(p.periodKey).toBe('2026-09-02');
    expect(p.incrementLabel).toBe('当日新增');
    expect(p.start.toISOString()).toBe(new Date('2026-09-02T00:00:00+08:00').toISOString());
  });

  it('weekly is the previous natural week', () => {
    const p = wecomReportPeriod('weekly', new Date('2026-09-02T09:00:00+08:00'));
    expect(p.periodKey).toBe('2026-08-24');
    expect(p.rangeLabel).toBe('2026-08-24 ~ 2026-08-30');
    expect(p.incrementLabel).toBe('本期新增');
  });

  it('monthly is the previous natural month', () => {
    const p = wecomReportPeriod('monthly', new Date('2026-09-01T09:00:00+08:00'));
    expect(p.periodKey).toBe('2026-08');
    expect(p.title).toBe('月报（2026年8月）');
  });
});

describe('wecomReportCutoff', () => {
  it('caps an in-progress daily period at now', () => {
    const now = new Date('2026-09-02T20:00:00+08:00');
    const p = wecomReportPeriod('daily', now);
    expect(wecomReportCutoff(p, now).getTime()).toBe(now.getTime());
  });

  it('uses period end for a completed week', () => {
    const now = new Date('2026-09-02T09:00:00+08:00');
    const p = wecomReportPeriod('weekly', now);
    expect(wecomReportCutoff(p, now).getTime()).toBe(p.endExclusive.getTime());
  });
});

describe('wecomReportShouldFire', () => {
  const base = {
    enabled: true,
    sendHour: 20,
    sendMinute: 0,
    sendWeekday: 1,
    sendMonthDay: 1,
    lastSentPeriod: null as string | null,
  };

  it('does not fire before due time', () => {
    expect(
      wecomReportShouldFire('daily', base, new Date('2026-09-02T19:59:00+08:00')),
    ).toBe(false);
  });

  it('fires after due time if this period not sent', () => {
    expect(
      wecomReportShouldFire('daily', base, new Date('2026-09-02T20:00:00+08:00')),
    ).toBe(true);
  });

  it('does not fire twice for the same period', () => {
    expect(
      wecomReportShouldFire(
        'daily',
        { ...base, lastSentPeriod: '2026-09-02' },
        new Date('2026-09-02T21:00:00+08:00'),
      ),
    ).toBe(false);
  });

  it('weekly fires Monday 09:00 for last week', () => {
    expect(
      wecomReportShouldFire(
        'weekly',
        { ...base, sendHour: 9, sendMinute: 0, sendWeekday: 1 },
        new Date('2026-09-07T09:00:00+08:00'),
      ),
    ).toBe(true);
  });
});

describe('wecomReportDueAt', () => {
  it('monthly clamps to last day of month', () => {
    const due = wecomReportDueAt(
      'monthly',
      {
        enabled: true,
        sendHour: 9,
        sendMinute: 0,
        sendWeekday: 1,
        sendMonthDay: 31,
        lastSentPeriod: null,
      },
      new Date('2026-09-10T00:00:00+08:00'),
    );
    expect(due.toISOString()).toBe(new Date('2026-09-30T09:00:00+08:00').toISOString());
  });
});

describe('formatWecomReportMarkdown', () => {
  it('renders stock plus increment lines', () => {
    const p = wecomReportPeriod('daily', new Date('2026-09-02T20:00:00+08:00'));
    const md = formatWecomReportMarkdown(p, emptyStats);
    expect(md).toContain('**杜康好客 · 日报（2026-09-02）**');
    expect(md).toContain('用户数量：10（当日新增 2）');
    expect(md).toContain('订单金额：1000.00（当日新增 80.50）');
    expect(md).toContain('核销单数量：8（当日新增 3）');
  });
});