import assert from 'node:assert/strict';
import { chromium } from '@playwright/test';
import { mkdtemp, rm, readFile } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import { resolve } from 'node:path';
import { createApp } from '../../apps/server/src/app.ts';
import { loadConfig } from '../../apps/server/src/config.ts';
import { requests as table } from '../../apps/server/src/db/schema.ts';

const folder = await mkdtemp(resolve(tmpdir(), 'hop-reconnect-'));
const runtime = await createApp({
  ...loadConfig({
    APP_URL: 'http://127.0.0.1',
    DATABASE_PATH: resolve(folder, 'db.sqlite'),
    UPLOAD_DIR: resolve(folder, 'uploads'),
    MIN_FREE_DISK_MB: '0',
    SAME_NETWORK_DISCOVERY_ENABLED: 'true',
    LOCATION_DISCOVERY_ENABLED: 'false',
    SESSION_SECRET: 's'.repeat(40),
    DISCOVERY_SECRET: 'd'.repeat(40),
  }),
  webRoot: resolve('apps/web/dist'),
});
let browser;
try {
  await runtime.app.listen({ host: '127.0.0.1', port: 0 });
  const url = `http://127.0.0.1:${runtime.app.server.address().port}`;
  runtime.setDevOrigin(url);
  browser = await chromium.launch({
    headless: true,
    ...(process.env.HOP_BROWSER_EXECUTABLE
      ? { executablePath: process.env.HOP_BROWSER_EXECUTABLE }
      : {}),
  });
  const a = await browser.newContext({ viewport: { width: 1280, height: 900 } }),
    b = await browser.newContext({
      viewport: { width: 390, height: 844 },
      isMobile: true,
      hasTouch: true,
    });
  const sender = await a.newPage(),
    receiver = await b.newPage(),
    errors = [];
  for (const page of [sender, receiver])
    page.on('pageerror', (error) => errors.push(error.message));
  await Promise.all([sender.goto(url), receiver.goto(url)]);
  await sender.locator('.peer-card').first().waitFor();
  const receiverState = await receiver.evaluate(
    async () => (await (await fetch('/api/device/me')).json()).device,
  );
  const guestId = runtime.service.deviceGuest(receiverState.id).guestId;
  await sender.locator('.peer-card').first().click();
  const bytes = Buffer.from('first-click transfer');
  await sender
    .locator('.send-dialog input[type="file"]')
    .setInputFiles({ name: 'first.txt', mimeType: 'text/plain', buffer: bytes });
  let hold = true;
  runtime.io.use((socket, next) => {
    if (hold && socket.data.guest.id === guestId) setTimeout(() => next(), 1200);
    else next();
  });
  const serverSocket = [...runtime.io.sockets.sockets.values()].find(
    (socket) => socket.data.guest.id === guestId,
  );
  serverSocket.conn.close();
  await receiver.locator('.app-shell[data-online="false"]').waitFor();
  const responses = [],
    keys = [];
  sender.on('response', (response) => {
    if (
      new URL(response.url()).pathname === '/api/transfer-requests' &&
      response.request().method() === 'POST'
    ) {
      responses.push(response.status());
      keys.push(response.request().headers()['idempotency-key']);
    }
  });
  await sender.getByRole('button', { name: '전송하기', exact: true }).click();
  await sender.getByRole('button', { name: '연결 확인 중', exact: true }).waitFor();
  assert.equal(await sender.locator('.error-toast').count(), 0);
  assert.match(await sender.locator('.selected-files').innerText(), /first.txt/);
  await receiver.getByRole('button', { name: '수락', exact: true }).waitFor();
  hold = false;
  assert.equal(responses[0], 409);
  assert.equal(responses.at(-1), 200);
  assert.equal(new Set(keys).size, 1, 'reconnect retry reuses one idempotency key');
  assert.equal(runtime.service.db.select().from(table).all().length, 1, 'only one logical request');
  const downloaded = receiver.waitForEvent('download');
  await receiver.getByRole('button', { name: '수락', exact: true }).click();
  const download = await downloaded;
  assert.equal(download.suggestedFilename(), 'first.txt');
  assert.deepEqual(await readFile(await download.path()), bytes);
  assert.equal(await sender.locator('.error-toast').count(), 0);
  assert.deepEqual(errors, []);
  console.log(
    'PASS: same-network peer reconnect on first file send, connection feedback, file draft retained, stable retry key, one request, accepted download on mobile.',
  );
} finally {
  await browser?.close();
  await runtime.app.close();
  await rm(folder, { recursive: true, force: true });
}