import { BadRequestException } from '@nestjs/common';
import { SendDownstreamRequeueTaskService } from './send-downstream-requeue-task.service';

function prismaMock(): Record<string, any> {
  const result: Record<string, any> = {
    cmppDownstreamDelivery: {
      count: jest.fn(), groupBy: jest.fn(), findFirst: jest.fn(), findMany: jest.fn(), findUnique: jest.fn(),
    },
    downstreamRequeueTask: {
      findFirst: jest.fn(), findMany: jest.fn(), count: jest.fn(), findUnique: jest.fn(), create: jest.fn(), update: jest.fn(),
    },
    downstreamRequeueTaskItem: {
      createMany: jest.fn(), groupBy: jest.fn(), findMany: jest.fn(), findFirst: jest.fn(), updateMany: jest.fn(), update: jest.fn(),
    },
    operationLog: { create: jest.fn() },
  };
  result.$transaction = jest.fn(async (callback: (tx: unknown) => unknown) => callback(result));
  return result;
}

let mock: Record<string, any>;

describe('SendDownstreamRequeueTaskService', () => {
  beforeEach(() => { mock = prismaMock(); });

  it('previews all matches separately from replayable records', async () => {
    mock.cmppDownstreamDelivery.count.mockResolvedValueOnce(12).mockResolvedValueOnce(8);
    mock.cmppDownstreamDelivery.groupBy
      .mockResolvedValueOnce([{ status: 'pending', _count: { _all: 8 } }, { status: 'delivered', _count: { _all: 4 } }])
      .mockResolvedValueOnce([{ applicationId: 'app-1', _count: { _all: 12 } }]);
    mock.cmppDownstreamDelivery.findFirst.mockResolvedValue({ createdAt: new Date('2026-08-11T00:00:00Z') });
    const service = new SendDownstreamRequeueTaskService(mock as never, { requeueDownstreamDelivery: jest.fn() });
    const result = await service.preview({ status: 'all' });
    expect(result).toEqual(expect.objectContaining({ matchedCount: 12, replayableCount: 8, skippedCount: 4, applicationCount: 1 }));
  });

  it('rejects delivered filters and short reasons', async () => {
    const service = new SendDownstreamRequeueTaskService(mock as never, { requeueDownstreamDelivery: jest.fn() });
    await expect(service.create({ filter: { status: 'delivered' }, snapshotAt: new Date().toISOString(), reason: '事故恢复' })).rejects.toBeInstanceOf(BadRequestException);
    await expect(service.create({ filter: { status: 'pending' }, snapshotAt: new Date().toISOString(), reason: '短' })).rejects.toBeInstanceOf(BadRequestException);
  });

  it('rejects a new task when the same application scope already has an unfinished task', async () => {
    mock.downstreamRequeueTask.findFirst.mockResolvedValue({ taskNo: 'DRT-EXISTING' });
    const service = new SendDownstreamRequeueTaskService(mock as never, { requeueDownstreamDelivery: jest.fn() });
    await expect(service.create({ filter: { applicationId: 'app-1', status: 'pending' }, snapshotAt: new Date().toISOString(), reason: '处理历史回执积压' })).rejects.toThrow('DRT-EXISTING');
  });

  it('skips a delivery that automatic recovery already confirmed before task execution', async () => {
    mock.downstreamRequeueTask.findMany.mockResolvedValue([{ id: 'task-1' }]);
    mock.downstreamRequeueTask.findUnique
      .mockResolvedValueOnce({ id: 'task-1', taskNo: 'DRT-1', status: 'queued', startedAt: null, ratePerSecond: 10, consecutiveFailures: 0, consecutiveFailureLimit: 10 })
      .mockResolvedValueOnce({ status: 'running' })
      .mockResolvedValue({ status: 'running' });
    mock.downstreamRequeueTaskItem.findMany
      .mockResolvedValueOnce([])
      .mockResolvedValueOnce([{ id: 'item-1', deliveryId: 'delivery-1' }])
      .mockResolvedValueOnce([]);
    mock.downstreamRequeueTaskItem.updateMany.mockResolvedValue({ count: 1 });
    mock.cmppDownstreamDelivery.findUnique.mockResolvedValue({ status: 'delivered', payload: {}, deliveryType: 'receipt', application: { status: 'active', interfaceEnabled: true } });
    mock.downstreamRequeueTaskItem.groupBy.mockResolvedValue([{ status: 'skipped', _count: { _all: 1 } }]);
    const requeue = jest.fn();
    const service = new SendDownstreamRequeueTaskService(mock as never, { requeueDownstreamDelivery: requeue });
    await service.runScan();
    expect(requeue).not.toHaveBeenCalled();
    expect(mock.downstreamRequeueTaskItem.update).toHaveBeenCalledWith(expect.objectContaining({ data: expect.objectContaining({ status: 'skipped', skipReason: '已被客户确认' }) }));
  });
});