const puppeteer = require('puppeteer');
const riotserver = 'http://localhost:8080';
const homeserver = 'http://localhost:8008';
let browser = null;

jest.setTimeout(10000);

async function try_get_innertext(page, selector) {
  const field = await page.$(selector);
  if (field != null) {
    const text_handle = await field.getProperty('innerText');
    return await text_handle.jsonValue();
  }
  return null;
}

async function new_page() {
  const page = await browser.newPage();
  await page.setViewport({
    width: 1280,
    height: 800
  });
  return page;
}

function log_console(page) {
  let buffer = "";
  page.on('console', msg => {
    buffer += msg.text() + '\n';
  });
  return {
    logs() {
      return buffer;
    }
  }
}

function log_xhr_requests(page) {
  let buffer = "";
  page.on('request', req => {
    const type = req.resourceType();
    if (type === 'xhr' || type === 'fetch') {
      buffer += `${req.method()} ${req.url()} \n`;
      if (req.method() === "POST") {
        buffer += "  Post data: " + req.postData();
      }
    }
  });
  return {
    logs() {
      return buffer;
    }
  }
}

function rnd_int(max) {
  return Math.ceil(Math.random()*max);
}

function riot_url(path) {
  return riotserver + path;
}

function delay(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

async function get_outer_html(element_handle) {
  const html_handle = await element_handle.getProperty('outerHTML');
  return await html_handle.jsonValue();
}

async function print_elements(label, elements) {
  console.log(label, await Promise.all(elements.map(get_outer_html)));
}

async function replace_input_text(input, text) {
  // click 3 times to select all text
  await input.click({clickCount: 3});
  // then remove it with backspace
  await input.press('Backspace');
  // and type the new text
  await input.type(text);
}

beforeAll(async () => {
  browser = await puppeteer.launch();
});

afterAll(() => {
  return browser.close();
})

test('test page loads', async () => {
  const page = await browser.newPage();
  await page.goto(riot_url('/'));
  const title = await page.title();
  expect(title).toBe("Riot");
});

test('test signup', async () => {
  const page = await new_page();
  const console_logs = log_console(page);
  const xhr_logs = log_xhr_requests(page);
  await page.goto(riot_url('/#/register'));
  //click 'Custom server' radio button
  await page.waitForSelector('#advanced', {visible: true, timeout: 500});
  await page.click('#advanced');

  const username = 'bruno-' + rnd_int(10000);
  const password = 'testtest';
  //fill out form
  await page.waitForSelector('.mx_ServerConfig', {visible: true, timeout: 500});
  const login_fields = await page.$$('.mx_Login_field');
  expect(login_fields.length).toBe(7);
  const username_field = login_fields[2];
  const password_field = login_fields[3];
  const password_repeat_field = login_fields[4];
  const hsurl_field = login_fields[5];
  await replace_input_text(username_field, username);
  await replace_input_text(password_field, password);
  await replace_input_text(password_repeat_field, password);
  await replace_input_text(hsurl_field, homeserver);
  //wait over a second because Registration/ServerConfig have a 1000ms
  //delay to internally set the homeserver url
  //see Registration::render and ServerConfig::props::delayTimeMs
  await delay(1200);
  /// focus on the button to make sure error validation
  /// has happened before checking the form is good to go
  const register_button = await page.$('.mx_Login_submit');
  await register_button.focus();
  //check no errors
  const error_text = await try_get_innertext(page, '.mx_Login_error');
  expect(error_text).toBeFalsy();
  //submit form
  await page.screenshot({path: "beforesubmit.png", fullPage: true});
  await register_button.click();

  //confirm dialog saying you cant log back in without e-mail
  await page.waitForSelector('.mx_QuestionDialog', {visible: true, timeout: 500});
  const continue_button = await page.$('.mx_QuestionDialog button.mx_Dialog_primary');
  print_elements('continue_button', [continue_button]);
  await continue_button.click();
  //wait for registration to finish so the hash gets set
  //onhashchange better?
  await delay(1000);
/*
  await page.screenshot({path: "afterlogin.png", fullPage: true});
  console.log('browser console logs:');
  console.log(console_logs.logs());
  console.log('xhr logs:');
  console.log(xhr_logs.logs());
*/


  //print_elements('page', await page.$('#matrixchat'));
//  await navigation_promise;

  //await page.waitForSelector('.mx_MatrixChat', {visible: true, timeout: 3000});
  const url = page.url();
  expect(url).toBe(riot_url('/#/home'));
});