import { beforeEach, describe, expect, it, mock, vi } from 'bun:test';
import { Hono } from 'hono';

mock.module('@/lib/prisma', () => ({
  default: {
    student: {
      findMany: mock(),
      count: mock(),
    },
  },
  getPrismaClient: mock(),
  UnitOfWork: class {},
}));

import prisma from '@/lib/prisma';
import { studentsRoutes } from '@/modules/students';

const app = new Hono();
app.route('/students', studentsRoutes);

const student = {
  id: 'student-1',
  groupId: 'group-1',
  fullName: 'Ana Pérez',
  email: 'ana@example.com',
  phone: null,
  guardianName: 'Luis Pérez',
  guardianPhone: null,
  notes: null,
  createdAt: new Date('2026-08-01T10:00:00.000Z'),
  updatedAt: new Date('2026-08-01T10:00:00.000Z'),
};

describe('students routes', () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  it('lists students with pagination', async () => {
    prisma.student.findMany.mockResolvedValue([student]);
    prisma.student.count.mockResolvedValue(21);

    const res = await app.request('/students?page=2&pageSize=10');

    expect(res.status).toBe(200);
    expect(await res.json()).toEqual({
      data: [
        {
          ...student,
          createdAt: student.createdAt.toISOString(),
          updatedAt: student.updatedAt.toISOString(),
        },
      ],
      pagination: { page: 2, pageSize: 10, total: 21, totalPages: 3 },
    });
    expect(prisma.student.findMany).toHaveBeenCalledWith({
      skip: 10,
      take: 10,
      orderBy: { createdAt: 'desc' },
    });
    expect(prisma.student.count).toHaveBeenCalledWith();
  });

  it('uses default pagination', async () => {
    prisma.student.findMany.mockResolvedValue([]);
    prisma.student.count.mockResolvedValue(0);

    const res = await app.request('/students');

    expect(res.status).toBe(200);
    expect(await res.json()).toEqual({
      data: [],
      pagination: { page: 1, pageSize: 10, total: 0, totalPages: 0 },
    });
  });

  it('rejects invalid pagination query parameters', async () => {
    const res = await app.request('/students?page=0&pageSize=25');

    expect(res.status).toBe(400);
    expect(await res.json()).toMatchObject({ status: 400, title: 'Bad Request' });
  });
});