import request from 'supertest';
import app from '../../src/app';
import { pool } from '../../src/db';
import { resetDb, closeDb } from './setup/testDb';

beforeEach(async () => {
  await resetDb();
});

afterAll(async () => {
  await pool.end();
  await closeDb();
});

const PNG = Buffer.from(
  'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==',
  'base64'
);

/**
 * Nothing exists, so every id below is absent. 999999 is well-formed and
 * missing; 'abc' is not a number at all. Before #207 the first answered 200
 * with an empty body and the second answered 500, because the raw string
 * reached Postgres and raised 22P02.
 */
const ABSENT = 999999;

describe('admin item routes for an id that does not exist', () => {
  it('PUT answers 404 rather than 200 with an empty body', async () => {
    const res = await request(app)
      .put(`/api/admin/items/${ABSENT}`)
      .field('name', 'renamed')
      .field('price', '10.00');

    expect(res.status).toBe(404);
    expect(res.body).toEqual({ error: 'not found' });
  });

  it('mark-sold answers 404', async () => {
    const res = await request(app).post(`/api/admin/items/${ABSENT}/mark-sold`);
    expect(res.status).toBe(404);
  });

  it('mark-available answers 404', async () => {
    const res = await request(app).post(`/api/admin/items/${ABSENT}/mark-available`);
    expect(res.status).toBe(404);
  });

  // A garbage id used to reach Postgres and raise 22P02, which the catch turned
  // into a 500. From the caller's side "/items/abc" identifies no item, exactly
  // like "/items/999999" does.
  it.each(['abc', '1.5', '-1', ''])('PUT answers 404 for the id %p', async (id) => {
    const res = await request(app)
      .put(`/api/admin/items/${id}`)
      .field('name', 'renamed')
      .field('price', '10.00');

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

  it('mark-available answers 404 for a non-numeric id', async () => {
    const res = await request(app).post('/api/admin/items/abc/mark-available');
    expect(res.status).toBe(404);
  });
});

describe('admin item routes for an id that does exist', () => {
  async function makeItem(): Promise<number> {
    const res = await request(app)
      .post('/api/admin/items')
      .field('name', 'a real item')
      .field('price', '12.00')
      .attach('images', PNG, 'a.png');
    return res.body.id;
  }

  // The point of the change is to stop lying about misses, not to start
  // refusing hits.
  it('PUT still updates and answers with the item', async () => {
    const id = await makeItem();

    const res = await request(app)
      .put(`/api/admin/items/${id}`)
      .field('name', 'renamed')
      .field('price', '15.00');

    expect(res.status).toBe(200);
    expect(res.body.name).toBe('renamed');
    expect(res.body.price_cents).toBe(1500);
  });

  it('mark-available still publishes', async () => {
    const id = await makeItem();

    const res = await request(app).post(`/api/admin/items/${id}/mark-available`);

    expect(res.status).toBe(200);
    expect(res.body.status).toBe('available');
  });
});

describe('a non-numeric id on every admin item route', () => {
  // Each of these used to reach Postgres, raise 22P02 and surface as a 500.
  // The block was named "every" while covering two; it now covers every POST
  // route that takes an id, which is what makes the name true (#207).
  it.each([
    ['mark-sold', '/api/admin/items/abc/mark-sold'],
    ['mark-available', '/api/admin/items/abc/mark-available'],
    ['unpublish', '/api/admin/items/abc/unpublish'],
    ['regenerate', '/api/admin/item-drafts/abc/regenerate'],
    ['discard', '/api/admin/item-drafts/abc/discard'],
    ['restore', '/api/admin/item-drafts/abc/restore'],
    ['remove-background', '/api/admin/item-drafts/abc/images/1/remove-background'],
    ['restore-original', '/api/admin/item-drafts/abc/images/1/restore-original'],
    // The image id, not the item id — a route with two of them can guard one
    // and forget the other, and only a case each way would notice.
    ['remove-background by image', '/api/admin/item-drafts/1/images/abc/remove-background'],
    ['restore-original by image', '/api/admin/item-drafts/1/images/abc/restore-original']
  ])('%s answers 404', async (_name, path) => {
    expect((await request(app).post(path)).status).toBe(404);
  });

  it('PUT answers 404', async () => {
    const res = await request(app)
      .put('/api/admin/items/abc')
      .field('name', 'renamed')
      .field('price', '10.00');

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

  // Publish validates its body before it looks at the id, so this sends a
  // valid one — otherwise the 400 would mask whether the id was ever handled.
  it('publish answers 404', async () => {
    const res = await request(app)
      .post('/api/admin/item-drafts/abc/publish')
      .send({ name: 'a name', description: '', priceCents: 1000 });

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

  it.each([
    ['DELETE an item', '/api/admin/items/abc'],
    ['DELETE an image by item id', '/api/admin/items/abc/images/1'],
    ['DELETE an image by image id', '/api/admin/items/1/images/abc']
  ])('%s answers 404', async (_name, path) => {
    expect((await request(app).delete(path)).status).toBe(404);
  });
});

/**
 * A well-formed id that is simply absent.
 *
 * Deliberately not the same question as a malformed one. DELETE stays 204 for
 * an item that is not there: the method is idempotent and the caller's intent —
 * that the item should not exist — is satisfied either way. What must not
 * happen is a 500, which is what a malformed id used to produce.
 */
describe('a well-formed but absent id on the delete routes', () => {
  it('DELETE answers 204 rather than failing', async () => {
    expect((await request(app).delete(`/api/admin/items/${ABSENT}`)).status).toBe(204);
  });
});