import { describe, it, expect, beforeAll, afterAll, beforeEach } from 'vitest';
import request from 'supertest';
import fs from 'node:fs/promises';
import path from 'node:path';
import os from 'node:os';
import { createApp } from '../../src/app.js';
import { getPool, closePool } from '../../src/db.js';
import { loadConfig } from '../../src/config.js';
import { createJob, markDone } from '../../src/jobs/jobRepository.js';
import { ensureStorageDirs, outputPath } from '../../src/storage.js';

let app;
let pool;
let config;

beforeAll(async () => {
  config = { ...loadConfig(), storageDir: await fs.mkdtemp(path.join(os.tmpdir(), 'converter-status-')) };
  await ensureStorageDirs(config);
  pool = getPool(config);
  app = createApp(config, pool);
});

afterAll(async () => {
  await closePool();
  await fs.rm(config.storageDir, { recursive: true, force: true });
});

beforeEach(async () => {
  await pool.query('DELETE FROM conversion_jobs');
});

function baseJob(id) {
  return {
    id,
    family: 'image',
    sourceFormat: 'png',
    targetFormat: 'webp',
    originalFilename: 'holiday photo.png',
    inputPath: `${id}.png`,
    inputMimeType: 'image/png',
    expiresAt: new Date(Date.now() + 3600 * 1000),
  };
}

describe('GET /api/jobs/:id', () => {
  it('returns job status without the error log field', async () => {
    const id = '66666666-6666-4666-8666-666666666666';
    await createJob(pool, baseJob(id));

    const response = await request(app).get(`/api/jobs/${id}`);

    expect(response.status).toBe(200);
    expect(response.body.status).toBe('pending');
    expect(response.body.originalFilename).toBe('holiday photo.png');
    expect(response.body.errorLog).toBeUndefined();
  });

  it('returns 404 for an unknown id', async () => {
    const response = await request(app).get('/api/jobs/00000000-0000-4000-8000-000000000000');
    expect(response.status).toBe(404);
  });
});

describe('GET /api/jobs/:id/download', () => {
  it('streams the converted file with correct headers once done', async () => {
    const id = '77777777-7777-4777-8777-777777777777';
    await createJob(pool, baseJob(id));
    const filePath = outputPath(config, id, 'webp');
    await fs.writeFile(filePath, Buffer.from('fake webp bytes'));
    await markDone(pool, id, { outputPath: `${id}.webp`, outputMimeType: 'image/webp' });

    const response = await request(app).get(`/api/jobs/${id}/download`);

    expect(response.status).toBe(200);
    expect(response.headers['content-type']).toBe('image/webp');
    expect(response.headers['content-disposition']).toContain('holiday photo.png');
    expect(response.body ?? response.text).toBeDefined();
  });

  it('returns 409 when the job is not done yet', async () => {
    const id = '88888888-8888-4888-8888-888888888888';
    await createJob(pool, baseJob(id));

    const response = await request(app).get(`/api/jobs/${id}/download`);

    expect(response.status).toBe(409);
  });

  it('returns 404 for an unknown id', async () => {
    const response = await request(app).get('/api/jobs/00000000-0000-4000-8000-000000000000/download');
    expect(response.status).toBe(404);
  });
});

describe('unexpected server errors', () => {
  it('returns a generic 500 without leaking internal error details', async () => {
    const originalQuery = pool.query.bind(pool);
    pool.query = () => Promise.reject(new Error('connection reset by peer'));

    const response = await request(app).get('/api/jobs/99999999-9999-4999-8999-999999999999');

    pool.query = originalQuery;

    expect(response.status).toBe(500);
    expect(response.body.error).toBe('Internal server error');
    expect(JSON.stringify(response.body)).not.toContain('connection reset by peer');
  });
});