import { ConflictException, NotFoundException } from '@nestjs/common';
import { Test, TestingModule } from '@nestjs/testing';
import { PhoneNumber } from '../../../common/value-objects/phone-number/phone-number';
import { Status } from '../../../common/value-objects/status/status';
import { DRIZZLE } from '../../../database/database.module';
import { EmployeesRepository } from './employees.repository';

describe('EmployeesRepository', () => {
  let repository: EmployeesRepository;

  const limit = jest.fn();
  const orderBy = jest.fn();
  const offset = jest.fn();
  const where = jest.fn();
  const from = jest.fn();
  const select = jest.fn();
  const returning = jest.fn();
  const values = jest.fn();
  const insert = jest.fn();
  const set = jest.fn();
  const update = jest.fn();
  const del = jest.fn();
  const transaction = jest.fn();
  const $dynamic = jest.fn();

  const db = {
    select,
    insert,
    update,
    delete: del,
    transaction,
  };

  const row = {
    id: 'emp-1',
    code: 'EMP_01',
    name: 'Ada Lovelace',
    phone: '+6281234567890',
    position: 'sales',
    status: 'draft',
    createdAt: 1_700_000_000_000,
    updatedAt: 1_700_000_000_000,
    createdBy: 'user-1',
    updatedBy: 'user-1',
    userId: null,
  };

  const createInput = {
    code: 'EMP_01',
    name: 'Ada Lovelace',
    phone: PhoneNumber.create('+6281234567890'),
    position: 'sales' as const,
    userId: 'user-1',
  };

  beforeEach(async () => {
    jest.clearAllMocks();
    where.mockImplementation(() =>
      Object.assign(Promise.resolve([{ id: 'user-1', username: 'admin' }]), {
        limit,
        orderBy,
        returning,
      }),
    );
    orderBy.mockImplementation(() => ({ limit }));
    limit.mockImplementation(() => ({ offset }));
    offset.mockResolvedValue([row]);
    from.mockImplementation(() => ({
      where,
      $dynamic,
    }));
    $dynamic.mockReturnValue({ where });
    select.mockImplementation(() => ({ from }));
    values.mockReturnValue({ returning });
    insert.mockReturnValue({ values });
    set.mockReturnValue({ where });
    update.mockReturnValue({ set });
    del.mockReturnValue({ where });
    returning.mockResolvedValue([row]);
    transaction.mockImplementation((fn: (tx: typeof db) => unknown) => fn(db));

    const moduleRef: TestingModule = await Test.createTestingModule({
      providers: [EmployeesRepository, { provide: DRIZZLE, useValue: db }],
    }).compile();
    repository = moduleRef.get(EmployeesRepository);
  });

  it('findById maps a row to domain Employee', async () => {
    limit.mockResolvedValueOnce([row]);
    const employee = await repository.findById('emp-1');
    expect(employee).toMatchObject({
      id: 'emp-1',
      code: 'EMP_01',
      name: 'Ada Lovelace',
      position: 'sales',
      createdBy: 'user-1',
    });
    expect(employee?.phone.value).toBe('+6281234567890');
    expect(employee?.status.value).toBe('draft');
    expect(employee?.createdAt.value).toBe(1_700_000_000_000);
  });

  it('findById returns null when missing', async () => {
    limit.mockResolvedValueOnce([]);
    await expect(repository.findById('missing')).resolves.toBeNull();
  });

  it('findByCode maps a row', async () => {
    limit.mockResolvedValueOnce([row]);
    const employee = await repository.findByCode('EMP_01');
    expect(employee?.code).toBe('EMP_01');
  });

  it('findByUserId maps a row', async () => {
    limit.mockResolvedValueOnce([row]);
    const employee = await repository.findByUserId('user-1');
    expect(employee?.id).toBe('emp-1');
  });

  it('list returns mapped rows and total', async () => {
    select
      .mockImplementationOnce(() => ({
        from: () => ({
          where: () => Promise.resolve([{ total: 1 }]),
        }),
      }))
      .mockImplementationOnce(() => ({
        from: () => ({
          $dynamic: () => ({
            where: () => ({
              orderBy: () => ({
                limit: () => ({
                  offset: () => Promise.resolve([row]),
                }),
              }),
            }),
          }),
        }),
      }));

    const result = await repository.list({
      name: 'Ada',
      code: 'EMP',
      phone: '+628',
      position: ['sales', 'driver'],
      status: 'draft',
      search: 'ada',
      limit: 10,
      offset: 0,
    });
    expect(result.total).toBe(1);
    expect(result.data[0].code).toBe('EMP_01');
    expect(result.data[0].phone.value).toBe('+6281234567890');
  });

  it('create inserts and maps unique violations', async () => {
    returning.mockResolvedValueOnce([row]);
    const created = await repository.create(createInput);
    expect(created.code).toBe('EMP_01');

    returning.mockRejectedValueOnce({ code: '23505' });
    await expect(repository.create(createInput)).rejects.toBeInstanceOf(
      ConflictException,
    );

    returning.mockRejectedValueOnce({
      cause: { code: '23505' },
    });
    await expect(repository.create(createInput)).rejects.toBeInstanceOf(
      ConflictException,
    );
  });

  it('create rethrows unknown errors', async () => {
    returning.mockRejectedValue(new Error('db down'));
    await expect(repository.create(createInput)).rejects.toThrow('db down');
  });

  it('createMany returns 0 for an empty batch and inserts otherwise', async () => {
    await expect(repository.createMany([])).resolves.toBe(0);
    transaction.mockImplementation(
      async (fn: (tx: typeof db) => Promise<void>) => {
        await fn(db);
      },
    );
    await expect(repository.createMany([createInput])).resolves.toBe(1);
  });

  it('createMany maps unique violations', async () => {
    transaction.mockRejectedValue({ code: '23505' });
    await expect(repository.createMany([createInput])).rejects.toBeInstanceOf(
      ConflictException,
    );
  });

  it('update throws when missing and maps unique violations', async () => {
    limit.mockResolvedValueOnce([]);
    await expect(
      repository.update('missing', { userId: 'user-1' }),
    ).rejects.toBeInstanceOf(NotFoundException);

    limit.mockResolvedValueOnce([row]);
    returning.mockRejectedValueOnce({ code: '23505' });
    await expect(
      repository.update('emp-1', { code: 'EMP_02', userId: 'user-1' }),
    ).rejects.toBeInstanceOf(ConflictException);
  });

  it('updateStatus throws when missing', async () => {
    returning.mockResolvedValueOnce([]);
    await expect(
      repository.updateStatus('missing', Status.create('active'), 'user-1'),
    ).rejects.toBeInstanceOf(NotFoundException);
  });

  it('delete throws when missing', async () => {
    returning.mockResolvedValueOnce([]);
    await expect(repository.delete('missing')).rejects.toBeInstanceOf(
      NotFoundException,
    );
  });

  it('delete maps foreign-key violations to ConflictException', async () => {
    returning.mockRejectedValueOnce({ code: '23503' });
    await expect(repository.delete('emp-1')).rejects.toMatchObject({
      constructor: ConflictException,
      message: 'Employee is referenced by other records',
    });

    returning.mockRejectedValueOnce({
      cause: { code: '23503' },
    });
    await expect(repository.delete('emp-1')).rejects.toBeInstanceOf(
      ConflictException,
    );
  });

  it('delete rethrows unknown errors', async () => {
    returning.mockRejectedValueOnce(new Error('db down'));
    await expect(repository.delete('emp-1')).rejects.toThrow('db down');
  });

  it('bulkUpdateStatus and bulkDelete return 0 for empty ids', async () => {
    await expect(
      repository.bulkUpdateStatus([], Status.create('active'), 'user-1'),
    ).resolves.toBe(0);
    await expect(repository.bulkDelete([])).resolves.toBe(0);
  });

  it('bulkUpdateStatus and bulkDelete return affected counts', async () => {
    returning.mockResolvedValue([{ id: 'emp-1' }, { id: 'emp-2' }]);
    await expect(
      repository.bulkUpdateStatus(
        ['emp-1', 'emp-2'],
        Status.create('active'),
        'user-1',
      ),
    ).resolves.toBe(2);
    returning.mockResolvedValue([{ id: 'emp-1' }]);
    await expect(repository.bulkDelete(['emp-1'])).resolves.toBe(1);
  });

  it('bulkDelete maps foreign-key violations to ConflictException', async () => {
    returning.mockRejectedValueOnce({
      cause: { code: '23503' },
    });
    await expect(repository.bulkDelete(['emp-1'])).rejects.toMatchObject({
      constructor: ConflictException,
      message: 'Employee is referenced by other records',
    });
  });

  it('extendListQuery is a passthrough hook', () => {
    const qb = { join: true };
    expect(repository.extendListQuery(qb, { limit: 10, offset: 0 })).toBe(qb);
  });
});