import { describe, expect, it } from 'vitest';
import {
  resolveOrderCityPartner,
  validatePartnerCityBinding,
  validatePartnerCommissionRates,
} from './city-partner';

describe('resolveOrderCityPartner', () => {
  const bindings = [
    {
      id: '1',
      partnerAccountId: '10',
      scopeType: 'CITY_WIDE' as const,
      districtCodes: null,
      orderCommissionRate: 0,
      redeemCommissionRate: 0.03,
      bindingStatus: 'ACTIVE' as const,
    },
    {
      id: '2',
      partnerAccountId: '20',
      scopeType: 'DISTRICT' as const,
      districtCodes: ['410105', '金水区'],
      orderCommissionRate: 0.01,
      redeemCommissionRate: 0.03,
      bindingStatus: 'ACTIVE' as const,
    },
  ];

  it('prefers district partner when district matches adcode', () => {
    const ref = resolveOrderCityPartner(bindings, '410105');
    expect(ref?.partnerAccountId).toBe('20');
    expect(ref?.scopeType).toBe('DISTRICT');
  });

  it('falls back to city-wide partner', () => {
    const ref = resolveOrderCityPartner(bindings, '410102');
    expect(ref?.partnerAccountId).toBe('10');
    expect(ref?.scopeType).toBe('CITY_WIDE');
  });

  it('returns null when no bindings', () => {
    expect(resolveOrderCityPartner([], '410105')).toBeNull();
  });
});

describe('validatePartnerCityBinding', () => {
  it('rejects duplicate partner', () => {
    const result = validatePartnerCityBinding(
      [{ id: '1', partnerAccountId: '10', scopeType: 'CITY_WIDE' }],
      { partnerAccountId: '10', scopeType: 'DISTRICT', districtCodes: ['410105'] },
    );
    expect(result.ok).toBe(false);
  });

  it('rejects second city-wide partner', () => {
    const result = validatePartnerCityBinding(
      [{ id: '1', partnerAccountId: '10', scopeType: 'CITY_WIDE' }],
      { partnerAccountId: '11', scopeType: 'CITY_WIDE' },
    );
    expect(result.ok).toBe(false);
  });

  it('rejects overlapping district codes', () => {
    const result = validatePartnerCityBinding(
      [{ id: '1', partnerAccountId: '10', scopeType: 'DISTRICT', districtCodes: ['410105'] }],
      { partnerAccountId: '11', scopeType: 'DISTRICT', districtCodes: ['410105'] },
    );
    expect(result.ok).toBe(false);
  });

  it('allows valid district binding', () => {
    const result = validatePartnerCityBinding(
      [{ id: '1', partnerAccountId: '10', scopeType: 'DISTRICT', districtCodes: ['410105'] }],
      { partnerAccountId: '11', scopeType: 'DISTRICT', districtCodes: ['410106'] },
    );
    expect(result.ok).toBe(true);
  });
});

describe('validatePartnerCommissionRates', () => {
  it('allows sum within default 5% cap', () => {
    expect(validatePartnerCommissionRates(0.02, 0.03).ok).toBe(true);
  });

  it('rejects sum above cap', () => {
    const result = validatePartnerCommissionRates(0.03, 0.03, 0.05);
    expect(result.ok).toBe(false);
    expect(result.message).toContain('5.00%');
  });

  it('respects custom city cap', () => {
    expect(validatePartnerCommissionRates(0.04, 0.04, 0.08).ok).toBe(true);
    expect(validatePartnerCommissionRates(0.05, 0.04, 0.08).ok).toBe(false);
  });
});