import { getMetadataArgsStorage } from 'typeorm';
import { CoolCommException } from '@cool-midway/core';
import { BaseEntity } from '../../../src/comm/entity/base';
import { TeamInvoiceEntity } from '../../../src/modules/team/entity/invoice';
import { TeamInvoiceService } from '../../../src/modules/team/service/invoice';
import { AdminTeamBillingController } from '../../../src/modules/team/controller/admin/billing';
import { CreateInvoiceDTO, SupportedCurrency } from '../../../src/comm/types/omni';

describe('Point 24: 国际多币种发票生成与历史收据导出 单元测试', () => {
  const metadata = getMetadataArgsStorage();

  // ==========================================
  // 1. 实体定义与数据库字段映射测试
  // ==========================================
  describe('1. 实体定义与数据库字段映射测试', () => {
    it('TeamInvoiceEntity 表名映射应为 team_invoice 且继承 BaseEntity', () => {
      const table = metadata.tables.find(t => t.target === TeamInvoiceEntity);
      expect(table).toBeDefined();
      expect(table?.name).toBe('team_invoice');
      expect(TeamInvoiceEntity.prototype instanceof BaseEntity).toBe(true);
    });

    it('TeamInvoiceEntity 应映射各核心字段至下划线数据列', () => {
      const columns = metadata.columns.filter(c => c.target === TeamInvoiceEntity);
      const expectedColumns: Record<string, string> = {
        invoiceNo: 'invoice_no',
        orderId: 'order_id',
        currency: 'currency',
        currencySymbol: 'currency_symbol',
        subtotal: 'subtotal',
        taxRate: 'tax_rate',
        taxAmount: 'tax_amount',
        totalAmount: 'total_amount',
        title: 'title',
        items: 'items',
        billingInfo: 'billing_info',
        status: 'status',
        paidAt: 'paid_at',
        htmlTemplate: 'html_template',
        textTemplate: 'text_template',
      };

      for (const [prop, colName] of Object.entries(expectedColumns)) {
        const col = columns.find(c => c.propertyName === prop);
        expect(col).toBeDefined();
        expect(col?.options.name || col?.propertyName).toBe(colName);
      }
    });
  });

  // ==========================================
  // 2. 发票流水号算法规范测试
  // ==========================================
  describe('2. 发票流水号生成算法测试', () => {
    let service: TeamInvoiceService;

    beforeEach(() => {
      service = new TeamInvoiceService();
    });

    it('流水号应严格遵循 INV-YYYYMMDD-XXXX 格式规范', () => {
      const invoiceNo = service.generateInvoiceNumber(new Date('2026-09-20'), 1);
      expect(invoiceNo).toMatch(/^INV-\d{8}-[A-Z0-9]{4}$/);
      expect(invoiceNo).toBe('INV-20260920-0001');
    });

    it('当日流水号自增序列溢出或大数时应正确填充与生成', () => {
      const invoiceNo42 = service.generateInvoiceNumber(new Date('2026-09-20'), 42);
      expect(invoiceNo42).toBe('INV-20260920-0042');

      const invoiceNo9999 = service.generateInvoiceNumber(new Date('2026-09-20'), 9999);
      expect(invoiceNo9999).toBe('INV-20260920-9999');
    });
  });

  // ==========================================
  // 3. 税费折算与金融级精确计算测试
  // ==========================================
  describe('3. 税费与净额精确折算测试', () => {
    let service: TeamInvoiceService;

    beforeEach(() => {
      service = new TeamInvoiceService();
    });

    it('不含税模式下应根据小计和税率精确计算税额与含税总额', () => {
      const calc = service.calculateTaxAndTotals({
        subtotal: 100,
        taxRate: 0.1, // 10%
        isTaxInclusive: false,
      });

      expect(calc.subtotal).toBe(100.0);
      expect(calc.taxAmount).toBe(10.0);
      expect(calc.totalAmount).toBe(110.0);
    });

    it('含税总额模式下应根据总额和税率精确逆向拆解净额与税额', () => {
      const calc = service.calculateTaxAndTotals({
        totalAmount: 110,
        taxRate: 0.1,
        isTaxInclusive: true,
      });

      expect(calc.subtotal).toBe(100.0);
      expect(calc.taxAmount).toBe(10.0);
      expect(calc.totalAmount).toBe(110.0);
    });

    it('复杂小数与税率计算时必须四舍五入防浮点数精度误差', () => {
      const calc = service.calculateTaxAndTotals({
        subtotal: 99.99,
        taxRate: 0.0825, // 8.25%
        isTaxInclusive: false,
      });

      // 99.99 * 0.0825 = 8.249175 -> 四舍五入为 8.25
      expect(calc.taxAmount).toBe(8.25);
      expect(calc.totalAmount).toBe(108.24);
    });

    it('零税率或免税交易应正确处理', () => {
      const calc = service.calculateTaxAndTotals({
        subtotal: 50,
        taxRate: 0,
      });

      expect(calc.subtotal).toBe(50.0);
      expect(calc.taxAmount).toBe(0.0);
      expect(calc.totalAmount).toBe(50.0);
    });
  });

  // ==========================================
  // 4. 多币种支持与符号格式化测试
  // ==========================================
  describe('4. 国际主流币种（USD, EUR, GBP, CNY）与符号匹配测试', () => {
    let service: TeamInvoiceService;

    beforeEach(() => {
      service = new TeamInvoiceService();
    });

    const testCurrencies: Array<{
      code: SupportedCurrency;
      expectedSymbol: string;
      formattedSample: string;
    }> = [
      { code: 'USD', expectedSymbol: '$', formattedSample: '$100.00' },
      { code: 'EUR', expectedSymbol: '€', formattedSample: '€100.00' },
      { code: 'GBP', expectedSymbol: '£', formattedSample: '£100.00' },
      { code: 'CNY', expectedSymbol: '¥', formattedSample: '¥100.00' },
    ];

    testCurrencies.forEach(({ code, expectedSymbol, formattedSample }) => {
      it(`币种 ${code} 应匹配符号 ${expectedSymbol} 并正确格式化`, () => {
        const symbol = service.getCurrencySymbol(code);
        expect(symbol).toBe(expectedSymbol);

        const formatted = service.formatCurrency(100, code);
        expect(formatted).toBe(formattedSample);
      });
    });

    it('应容错小写币种输入并归一化', () => {
      const symbol = service.getCurrencySymbol('usd' as SupportedCurrency);
      expect(symbol).toBe('$');
    });

    it('未知币种应安全回退默认美元 USD ($)', () => {
      const symbol = service.getCurrencySymbol('UNKNOWN' as SupportedCurrency);
      expect(symbol).toBe('$');
    });
  });

  // ==========================================
  // 5. 打印模板输出测试 (瑞士国际主义风格)
  // ==========================================
  describe('5. 打印模板生成测试 (瑞士国际主义风格)', () => {
    let service: TeamInvoiceService;

    beforeEach(() => {
      service = new TeamInvoiceService();
    });

    it('生成的 HTML 模板应包含发票核心字段且遵循克制排版无 emoji', () => {
      const html = service.renderHtmlTemplate({
        invoiceNo: 'INV-20260920-0001',
        issueDate: '2026-09-20',
        currency: 'USD',
        currencySymbol: '$',
        subtotal: 100.0,
        taxRate: 0.1,
        taxAmount: 10.0,
        totalAmount: 110.0,
        billingInfo: {
          companyName: 'Acme Global Ltd',
          taxId: 'US-99887766',
          address: '100 Market St, San Francisco, CA',
        },
        items: [
          {
            description: 'OmniCard Enterprise Plan (Annual)',
            quantity: 1,
            unitPrice: 100.0,
            amount: 100.0,
          },
        ],
      });

      expect(html).toContain('INV-20260920-0001');
      expect(html).toContain('Acme Global Ltd');
      expect(html).toContain('$100.00');
      expect(html).toContain('$10.00');
      expect(html).toContain('$110.00');
      expect(html).toContain('OmniCard Enterprise Plan (Annual)');
      // 瑞士国际主义风格验证：无 emoji，包含 Inter 或 Helvetica 字体定义
      expect(html).toMatch(/Inter|Helvetica/i);
      expect(html).not.toMatch(/[\uD800-\uDBFF][\uDC00-\uDFFF]/); // 禁止 emoji
    });

    it('生成的纯文本模板应结构化对齐', () => {
      const text = service.renderTextTemplate({
        invoiceNo: 'INV-20260920-0001',
        issueDate: '2026-09-20',
        currency: 'EUR',
        currencySymbol: '€',
        subtotal: 80.0,
        taxRate: 0.2,
        taxAmount: 16.0,
        totalAmount: 96.0,
        billingInfo: {
          companyName: 'Berlin Tech GmbH',
        },
        items: [
          {
            description: 'Pro Subscription',
            quantity: 1,
            unitPrice: 80.0,
            amount: 80.0,
          },
        ],
      });

      expect(text).toContain('INVOICE / RECEIPT');
      expect(text).toContain('INV-20260920-0001');
      expect(text).toContain('Berlin Tech GmbH');
      expect(text).toContain('€80.00');
      expect(text).toContain('€96.00');
    });
  });

  // ==========================================
  // 6. 服务层发票生成与历史查询 (TeamInvoiceService)
  // ==========================================
  describe('6. 业务服务层发票生成与查询测试', () => {
    let service: TeamInvoiceService;
    let invoices: TeamInvoiceEntity[];
    let nextId = 1;

    beforeEach(() => {
      invoices = [];
      nextId = 1;

      const mockRepo = {
        count: jest.fn(async () => invoices.length),
        save: jest.fn(async (entity: TeamInvoiceEntity) => {
          const saved = Object.assign(new TeamInvoiceEntity(), entity, {
            id: nextId++,
            createTime: new Date(),
            updateTime: new Date(),
          });
          invoices.push(saved);
          return saved;
        }),
        find: jest.fn(async (options?: { where?: Partial<TeamInvoiceEntity> }) => {
          if (!options?.where) return [...invoices];
          return invoices.filter(item => {
            const itemMap = item as unknown as Record<string, unknown>;
            for (const [key, val] of Object.entries(options.where!)) {
              if (itemMap[key] !== val) return false;
            }
            return true;
          });
        }),
      };

      service = new TeamInvoiceService();
      service.teamInvoiceEntity = mockRepo as unknown as TeamInvoiceService['teamInvoiceEntity'];
    });

    it('generateInvoice 应校验租户 ID 并成功创建发票', async () => {
      await expect(
        service.generateInvoice(0, {
          title: '企业版订阅',
          subtotal: 100,
        } as CreateInvoiceDTO)
      ).rejects.toThrow(CoolCommException);

      const orderData: CreateInvoiceDTO = {
        orderId: 'ORD-2026-001',
        currency: 'USD',
        title: 'OmniCard Enterprise Plan',
        subtotal: 200,
        taxRate: 0.1,
        billingInfo: {
          companyName: 'Global Corp',
          taxId: 'TAX-12345',
        },
        items: [
          {
            description: 'Team Seats x 10',
            quantity: 1,
            unitPrice: 200,
            amount: 200,
          },
        ],
      };

      const result = await service.generateInvoice(101, orderData);

      expect(result).toBeDefined();
      expect(result.tenantId).toBe(101);
      expect(result.invoiceNo).toMatch(/^INV-\d{8}-\d{4}$/);
      expect(result.currency).toBe('USD');
      expect(result.currencySymbol).toBe('$');
      expect(result.subtotal).toBe(200.0);
      expect(result.taxAmount).toBe(20.0);
      expect(result.totalAmount).toBe(220.0);
      expect(result.htmlTemplate).toBeDefined();
      expect(result.textTemplate).toBeDefined();
    });

    it('listInvoices 应严格按租户隔离并返回历史发票列表', async () => {
      // 租户 101 的两张发票
      await service.generateInvoice(101, {
        subtotal: 100,
        currency: 'USD',
        title: 'Invoice 1',
      });
      await service.generateInvoice(101, {
        subtotal: 200,
        currency: 'EUR',
        title: 'Invoice 2',
      });

      // 租户 202 的一张发票
      await service.generateInvoice(202, {
        subtotal: 300,
        currency: 'GBP',
        title: 'Invoice 3',
      });

      const list101 = await service.listInvoices(101);
      expect(list101.length).toBe(2);
      expect(list101.every(inv => inv.tenantId === 101)).toBe(true);

      const list202 = await service.listInvoices(202);
      expect(list202.length).toBe(1);
      expect(list202[0].tenantId).toBe(202);
    });
  });

  // ==========================================
  // 7. 控制器接口调用测试 (AdminTeamBillingController)
  // ==========================================
  describe('7. 控制器发票接口测试 (AdminTeamBillingController)', () => {
    let controller: AdminTeamBillingController;
    let invoiceService: TeamInvoiceService;

    beforeEach(() => {
      invoiceService = new TeamInvoiceService();
      invoiceService.generateInvoice = jest.fn(async (tenantId: number, dto: CreateInvoiceDTO) => {
        const inv = new TeamInvoiceEntity();
        inv.id = 1;
        inv.tenantId = tenantId;
        inv.invoiceNo = 'INV-20260920-0001';
        inv.totalAmount = 100;
        inv.currency = (dto.currency as SupportedCurrency) || 'USD';
        inv.currencySymbol = '$';
        return inv;
      });

      invoiceService.listInvoices = jest.fn(async (tenantId: number) => {
        const inv = new TeamInvoiceEntity();
        inv.id = 1;
        inv.tenantId = tenantId;
        inv.invoiceNo = 'INV-20260920-0001';
        return [inv];
      });

      controller = new AdminTeamBillingController();
      controller.teamInvoiceService = invoiceService;
      controller.ok = (data: unknown) => ({
        code: 1000,
        message: 'success',
        data,
      });
      (controller as unknown as { ctx: { admin: { tenantId: number } } }).ctx = {
        admin: { tenantId: 888 },
      };
    });

    it('POST /invoice/generate 应成功生成发票并关联当前租户', async () => {
      const res = await controller.generateInvoice({
        title: 'Enterprise Plan',
        subtotal: 100,
        currency: 'USD',
      });

      expect(res.code).toBe(1000);
      expect(invoiceService.generateInvoice).toHaveBeenCalledWith(
        888,
        expect.objectContaining({
          title: 'Enterprise Plan',
        })
      );
    });

    it('POST /invoice/list 应返回当前租户的发票历史收据列表', async () => {
      const res = await controller.listInvoices({});
      expect(res.code).toBe(1000);
      expect(invoiceService.listInvoices).toHaveBeenCalledWith(888);
    });
  });
});