const test = require('node:test');
const assert = require('node:assert/strict');
const express = require('express');
const fs = require('fs');
const http = require('http');
const os = require('os');
const path = require('path');
const { WebSocket } = require('ws');

require('../src/common');

const { hashPassword } = require('../src/auth');
const { createLocalControlService } = require('../src/player/local-control');

async function createTestService(options) {
  const temporaryDirectory = await fs.promises.mkdtemp(path.join(os.tmpdir(), 'pulse-local-control-'));
  const app = express();
  app.use(express.json());
  const server = http.createServer(app);
  const service = createLocalControlService(Object.assign({
    app: app,
    server: server,
    playerRuntime: {
      snapshotSlugs() { return ['screen-a']; },
      snapshotConnections() { return [{ id: 'client-a', clientName: 'Lobby', currentSlideTitle: 'Welcome' }]; },
      async sendCommandToConnection() { return 1; }
    },
    playerIdentifier: 'test-player',
    cachePath: path.join(temporaryDirectory, 'users.json')
  }, options || {}));
  return { app, server, service, temporaryDirectory };
}

test('local control leaves cached player media available to the static media route', async () => {
  const { app, server, temporaryDirectory } = await createTestService();
  const cachedImagePath = path.join(temporaryDirectory, 'player-cache', 'remote-images', 'cached-image.png');
  await fs.promises.mkdir(path.dirname(cachedImagePath), { recursive: true });
  await fs.promises.writeFile(cachedImagePath, 'cached-image');
  app.use('/media', express.static(temporaryDirectory));
  const listener = app.listen(0);
  try {
    const address = listener.address();
    const response = await fetch(`http://127.0.0.1:${address.port}/media/player-cache/remote-images/cached-image.png`);
    assert.equal(response.status, 200);
    assert.equal(await response.text(), 'cached-image');
  } finally {
    await new Promise((resolve) => listener.close(resolve));
    server.close();
    await fs.promises.rm(temporaryDirectory, { recursive: true, force: true });
  }
});

test('local control authenticates only cached eligible users and scopes commands to local runtime', async () => {
  const { app, service, temporaryDirectory } = await createTestService();
  const password = hashPassword('CorrectHorseBatteryStaple!');
  await service.saveUsers([{
    id: 7,
    name: 'Operator',
    username: 'operator',
    email: 'operator@example.com',
    password_hash: password.hash,
    password_salt: password.salt,
    password_iterations: password.iterations
  }]);
  await service.loadCache();

  const cachedUsers = JSON.parse(await fs.promises.readFile(path.join(temporaryDirectory, 'users.json'), 'utf8')).users;
  assert.equal(cachedUsers[0].id, undefined);
  assert.equal(cachedUsers[0].name, undefined);
  assert.equal(cachedUsers[0].email, undefined);
  assert.equal(cachedUsers[0].username, undefined);
  assert.equal(cachedUsers[0].password_iterations, undefined);
  const server = app.listen(0);
  try {
    const address = server.address();
    const login = await fetch(`http://127.0.0.1:${address.port}/local-control/api/login`, {
      method: 'POST',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ username: 'operator', password: 'CorrectHorseBatteryStaple!' })
    });
    assert.equal(login.status, 200);
    const setCookie = login.headers.get('set-cookie');
    assert.match(setCookie, /^pulse_local_control_test-player_session=/);
    const cookie = setCookie.split(';')[0];

    const state = await fetch(`http://127.0.0.1:${address.port}/local-control/api/state`, {
      headers: { cookie: cookie }
    });
    assert.equal(state.status, 200);
    const stateBody = await state.json();
    assert.equal(stateBody.screens[0].name, 'screen-a');
    assert.deepEqual(stateBody.screens[0].connections[0].clientName, 'Lobby');
    assert.equal(stateBody.screens[0].connections[0].currentSlideTitle, 'Welcome');

    const page = await fetch(`http://127.0.0.1:${address.port}/local-control`);
    const pageBody = await page.text();
    assert.ok(pageBody.indexOf('<th>Client</th><th>Screen</th><th>Current Slide</th><th>Actions</th>') !== -1);
    assert.ok(pageBody.indexOf('@media (max-width: 600px)') !== -1);
    assert.equal(pageBody.indexOf('<th>Status</th>'), -1);

    const command = await fetch(`http://127.0.0.1:${address.port}/local-control/api/commands`, {
      method: 'POST',
      headers: { cookie: cookie, 'content-type': 'application/json' },
      body: JSON.stringify({ slug: 'screen-a', connectionId: 'client-a', command: 'reload' })
    });
    assert.equal(command.status, 200);

    const invalidLogin = await fetch(`http://127.0.0.1:${address.port}/local-control/api/login`, {
      method: 'POST',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ username: 'other-user', password: 'CorrectHorseBatteryStaple!' })
    });
    assert.equal(invalidLogin.status, 401);

    const emailLogin = await fetch(`http://127.0.0.1:${address.port}/local-control/api/login`, {
      method: 'POST',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ username: 'operator@example.com', password: 'CorrectHorseBatteryStaple!' })
    });
    assert.equal(emailLogin.status, 401);
  } finally {
    await new Promise(function (resolve) { server.close(resolve); });
    await fs.promises.rm(temporaryDirectory, { recursive: true, force: true });
  }
});

test('local control refuses login when the cached authorization is stale', async () => {
  const { app, service, temporaryDirectory } = await createTestService({ cacheMaxAgeMs: 1 });
  const password = hashPassword('CorrectHorseBatteryStaple!');
  await service.saveUsers([{
    id: 7,
    name: 'Operator',
    username: 'operator',
    password_hash: password.hash,
    password_salt: password.salt,
    password_iterations: password.iterations
  }]);
  await service.loadCache();
  await new Promise(function (resolve) { setTimeout(resolve, 5); });

  const server = app.listen(0);
  try {
    const address = server.address();
    const response = await fetch(`http://127.0.0.1:${address.port}/local-control/api/login`, {
      method: 'POST',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ username: 'operator', password: 'CorrectHorseBatteryStaple!' })
    });
    assert.equal(response.status, 503);
  } finally {
    await new Promise(function (resolve) { server.close(resolve); });
    await fs.promises.rm(temporaryDirectory, { recursive: true, force: true });
  }
});

test('local control throttles repeated failed logins', async () => {
  const { app, service, temporaryDirectory } = await createTestService({ loginRateLimitMaxAttempts: 2, loginRateLimitWindowMs: 60 * 1000 });
  const password = hashPassword('CorrectHorseBatteryStaple!');
  await service.saveUsers([{
    username: 'operator',
    password_hash: password.hash,
    password_salt: password.salt
  }]);
  await service.loadCache();

  const server = app.listen(0);
  try {
    const address = server.address();
    const login = function (passwordValue) {
      return fetch(`http://127.0.0.1:${address.port}/local-control/api/login`, {
        method: 'POST',
        headers: { 'content-type': 'application/json' },
        body: JSON.stringify({ username: 'operator', password: passwordValue })
      });
    };
    assert.equal((await login('wrong-password')).status, 401);
    assert.equal((await login('wrong-password')).status, 401);
    const blocked = await login('CorrectHorseBatteryStaple!');
    assert.equal(blocked.status, 429);
    assert.equal(blocked.headers.get('retry-after') !== null, true);
  } finally {
    await new Promise(function (resolve) { server.close(resolve); });
    await fs.promises.rm(temporaryDirectory, { recursive: true, force: true });
  }
});

test('local control closes live sockets when authorization is revoked', async () => {
  const { server, service, temporaryDirectory } = await createTestService();
  const password = hashPassword('CorrectHorseBatteryStaple!');
  await service.saveUsers([{
    username: 'operator',
    password_hash: password.hash,
    password_salt: password.salt
  }]);
  await service.loadCache();

  await new Promise(function (resolve) { server.listen(0, resolve); });
  let socket;
  try {
    const address = server.address();
    const login = await fetch(`http://127.0.0.1:${address.port}/local-control/api/login`, {
      method: 'POST',
      headers: { 'content-type': 'application/json' },
      body: JSON.stringify({ username: 'operator', password: 'CorrectHorseBatteryStaple!' })
    });
    const cookie = login.headers.get('set-cookie').split(';')[0];
    socket = new WebSocket(`ws://127.0.0.1:${address.port}/local-control/ws`, { headers: { Cookie: cookie } });
    await new Promise(function (resolve, reject) {
      socket.once('open', resolve);
      socket.once('error', reject);
    });
    const closed = new Promise(function (resolve) { socket.once('close', resolve); });
    await service.saveUsers([]);
    await Promise.race([
      closed,
      new Promise(function (_resolve, reject) { setTimeout(function () { reject(new Error('WebSocket was not closed after authorization revocation.')); }, 1000); })
    ]);
  } finally {
    if (socket && socket.readyState !== WebSocket.CLOSED) { socket.close(); }
    await new Promise(function (resolve) { server.close(resolve); });
    await fs.promises.rm(temporaryDirectory, { recursive: true, force: true });
  }
});