import { beforeEach, describe, expect, it, vi } from 'vitest';

vi.mock('../../lib/sql.js', () => ({ sql: vi.fn() }));
vi.mock('../../lib/permission-middleware', () => ({
  getUserFromRequest: vi.fn(),
}));

import { sql } from '../../lib/sql.js';
import { getUserFromRequest } from '../../lib/permission-middleware';
import handler from '../../pages/api/custom-cards/index.js';
import itemHandler from '../../pages/api/custom-cards/[id].js';

function createRes() {
  const res = {
    statusCode: 200,
    body: null,
    status(code) {
      res.statusCode = code;
      return res;
    },
    json(data) {
      res.body = data;
      return res;
    },
  };
  return res;
}

describe('GET /api/custom-cards', () => {
  beforeEach(() => {
    vi.clearAllMocks();
    getUserFromRequest.mockResolvedValue({ userId: 1, email: 'a@b.c', role: 'user' });
    sql.mockResolvedValue({ rows: [] });
  });

  it('requires authentication', async () => {
    getUserFromRequest.mockResolvedValue(null);
    const res = createRes();

    await handler({ method: 'GET' }, res);

    expect(res.statusCode).toBe(401);
    expect(sql).not.toHaveBeenCalled();
  });

  it('returns the user designs', async () => {
    const design = { id: 5, name: 'Emberwing', card_id: 77 };
    sql.mockResolvedValueOnce({ rows: [design] });
    const res = createRes();

    await handler({ method: 'GET' }, res);

    expect(res.statusCode).toBe(200);
    expect(res.body.designs).toEqual([design]);
  });
});

describe('POST /api/custom-cards', () => {
  beforeEach(() => {
    vi.clearAllMocks();
    getUserFromRequest.mockResolvedValue({ userId: 1, email: 'a@b.c', role: 'user' });
    sql.mockResolvedValue({ rows: [] });
  });

  it('rejects designs without a name', async () => {
    const res = createRes();

    await handler(
      { method: 'POST', body: { name: '   ', rarity: 'rare' } },
      res
    );

    expect(res.statusCode).toBe(400);
    expect(sql).not.toHaveBeenCalled();
  });

  it('creates the design, mirrors a catalog card, and links ownership', async () => {
    sql
      .mockResolvedValueOnce({
        rows: [{ id: 10, card_id: null, name: 'Emberwing Phoenix' }],
      }) // INSERT custom_cards
      .mockResolvedValueOnce({ rows: [{ id: 77 }] }) // INSERT cards twin
      .mockResolvedValueOnce({ rows: [] }) // INSERT user_cards
      .mockResolvedValueOnce({
        rows: [{ id: 10, card_id: 77, name: 'Emberwing Phoenix' }],
      }); // link card_id back onto the design

    const res = createRes();
    await handler(
      {
        method: 'POST',
        body: {
          name: 'Emberwing Phoenix',
          mana_cost: '2RR',
          rarity: 'rare',
          frameId: 'classic',
          description: 'A phoenix reborn.',
          actions: 'Flying, haste',
        },
      },
      res
    );

    expect(res.statusCode).toBe(201);
    expect(res.body.design.card_id).toBe(77);
    // 4 statements: insert design, insert catalog twin, own row, link back
    expect(sql).toHaveBeenCalledTimes(4);
  });
});

describe('/api/custom-cards/[id]', () => {
  beforeEach(() => {
    vi.clearAllMocks();
    getUserFromRequest.mockResolvedValue({ userId: 1, email: 'a@b.c', role: 'user' });
    sql.mockResolvedValue({ rows: [] });
  });

  it('returns 404 when the design belongs to someone else', async () => {
    sql.mockResolvedValueOnce({ rows: [] }); // ownership lookup misses
    const res = createRes();

    await itemHandler({ method: 'GET', query: { id: '12' } }, res);

    expect(res.statusCode).toBe(404);
  });

  it('rejects invalid ids', async () => {
    const res = createRes();

    await itemHandler({ method: 'GET', query: { id: 'abc' } }, res);

    expect(res.statusCode).toBe(400);
  });

  it('updates the design and keeps the catalog twin in sync', async () => {
    sql
      .mockResolvedValueOnce({
        rows: [{ id: 10, user_id: 1, card_id: 77, name: 'Old Name' }],
      }) // ownership lookup hits
      .mockResolvedValueOnce({
        rows: [{ id: 10, card_id: 77, name: 'New Name' }],
      }) // UPDATE custom_cards
      .mockResolvedValueOnce({ rows: [{ id: 77 }] }) // UPDATE cards twin
      .mockResolvedValueOnce({ rows: [] }); // ensureOwnedRow (no-op if exists)

    const res = createRes();
    await itemHandler(
      { method: 'PUT', query: { id: '10' }, body: { name: 'New Name' } },
      res
    );

    expect(res.statusCode).toBe(200);
    expect(res.body.design.name).toBe('New Name');
    // 4 statements: ownership, update design, update twin, own row
    expect(sql).toHaveBeenCalledTimes(4);
  });

  it('deletes only the design row', async () => {
    sql
      .mockResolvedValueOnce({
        rows: [{ id: 10, user_id: 1, card_id: 77 }],
      }) // ownership lookup
      .mockResolvedValueOnce({ rows: [] }); // DELETE custom_cards

    const res = createRes();
    await itemHandler({ method: 'DELETE', query: { id: '10' } }, res);

    expect(res.statusCode).toBe(200);
    expect(sql).toHaveBeenCalledTimes(2);
  });
});