import $ from 'jquery';
import responsiveCutoff from 'vj/breakpoints.json';
import Notification from 'vj/components/notification';
import selectUser from 'vj/components/selectUser';
import { AutoloadPage } from 'vj/misc/Page';
import { i18n, request, tpl } from 'vj/utils';

function handleNavLogoutClick(ev) {
  const $logoutLink = $(ev.currentTarget);
  request
    .post($logoutLink.attr('href'))
    .then(() => window.location.reload());
  ev.preventDefault();
}

async function handlerSwitchAccount(ev) {
  ev.preventDefault();
  const target = await selectUser('Hint::icon::switch_account');
  if (!target) return;
  try {
    const res = await request.get(`/account/${target._id}`);
    if (res.url) window.location.href = res.url;
    else window.location.reload();
  } catch (error) {
    Notification.error(error.message);
  }
}

let $trigger;
let $menu;

function handleNavbar() {
  let fromHide = false;
  if ($(document).width() <= responsiveCutoff.mobile) {
    $menu.children().each(function () {
      const $ele = $(this);
      $ele.addClass('nav__list-item').removeClass('menu__item');
      $ele.children('a').addClass('nav__item').removeClass('menu__link');
      $ele.insertBefore($trigger, null);
    });
    $trigger.hide();
    return;
  }
  $trigger.show();

  const base = 70;

  let navItems = $('.nav__list--main > .nav__list-item');
  let navItem = navItems.length - 2;
  while (navItem && $('#menu').children('div').height() > base) {
    if (!$(navItems[navItem]).children('a').hasClass('nav--active')) {
      $(navItems[navItem]).removeClass('nav__list-item').addClass('menu__item');
      $(navItems[navItem]).children('a').removeClass('nav__item').addClass('menu__link');
      $menu.prepend($(navItems[navItem]));
    }
    navItem--;
    fromHide = true;
  }

  if (!fromHide && $menu.children().length) {
    while ($('#menu').children('div').height() <= base && $menu.children().length) {
      const $ele = $menu.children().first();
      $ele.addClass('nav__list-item').removeClass('menu__item');
      $ele.children('a').addClass('nav__item').removeClass('menu__link');
      $ele.insertBefore($trigger, null);
    }
  }

  navItems = $('.nav__list--main > .nav__list-item');
  navItem = navItems.length - 2;
  if ($('#menu').children('div').height() > base) {
    while (navItem && $('#menu').children('div').height() > base) {
      if (!$(navItems[navItem]).children('a').hasClass('nav--active')) {
        $(navItems[navItem]).removeClass('nav__list-item').addClass('menu__item');
        $(navItems[navItem]).children('a').removeClass('nav__item').addClass('menu__link');
        $menu.prepend($(navItems[navItem]));
      }
      navItem--;
    }
  }

  if (!$menu.children().length) $trigger.hide();
}

const navigationPage = new AutoloadPage('navigationPage', () => {
  if (!document.getElementById('panel') || !document.getElementById('menu')) return;

  $(document).on('click', '[name="nav_logout"]', handleNavLogoutClick);
  $(document).on('click', '[name="nav_switch_account"]', handlerSwitchAccount);

  let isOpen = false;
  const panel = document.getElementById('panel');
  const $slideoutOverlay = $('.slideout-overlay');
  const $hamburger = $('.header__hamburger .hamburger');
  const PADDING = 200;
  const TOLERANCE = 70;

  function isMobileLayout() {
    return $(document).width() <= responsiveCutoff.mobile;
  }

  function setTranslateX(x) {
    panel.style.transform = x ? `translateX(${x}px)` : '';
  }

  function open() {
    if (!isMobileLayout()) return;
    isOpen = true;
    $('html').addClass('slideout-open');
    setTranslateX(-PADDING);
    $hamburger.addClass('is-active');
    $slideoutOverlay.show();
  }

  // Touch swipe support
  let touchStartX = 0;
  let touchStartY = 0;
  let touchCurrentX = 0;
  let isSwiping = false;
  let isScrolling = false;

  function close() {
    isOpen = false;
    isSwiping = false;
    isScrolling = false;
    panel.style.transition = '';
    setTranslateX(0);
    $hamburger.removeClass('is-active');
    $slideoutOverlay.hide();
    $('html').removeClass('slideout-open');
  }

  panel.addEventListener('touchstart', (e) => {
    if (!isMobileLayout() || e.target.closest('[data-slideout-ignore]')) return;
    touchStartX = e.touches[0].clientX;
    touchStartY = e.touches[0].clientY;
    touchCurrentX = touchStartX;
    isSwiping = false;
    isScrolling = false;
  }, { passive: true });

  panel.addEventListener('touchmove', (e) => {
    if (!isMobileLayout()) return;
    touchCurrentX = e.touches[0].clientX;
    const dx = touchStartX - touchCurrentX;
    if (!isSwiping) {
      if (isScrolling) return;
      const dy = touchStartY - e.touches[0].clientY;
      const absDx = Math.abs(dx);
      const absDy = Math.abs(dy);
      if (absDx < 10 && absDy < 10) return;
      // Lock to scroll if vertical movement dominates
      if (absDy > absDx) {
        isScrolling = true;
        return;
      }
      isSwiping = true;
      if (!isOpen) $slideoutOverlay.show();
      $('html').addClass('slideout-open');
      panel.style.transition = 'none';
    }
    setTranslateX(isOpen
      ? Math.max(-PADDING, Math.min(0, -PADDING - dx))
      : Math.max(-PADDING, Math.min(0, -dx)));
  }, { passive: true });

  panel.addEventListener('touchend', () => {
    if (!isMobileLayout() || !isSwiping) return;
    panel.style.transition = '';
    const dx = touchStartX - touchCurrentX;
    if (isOpen) {
      if (-dx > TOLERANCE) close();
      else open();
    } else {
      if (dx > TOLERANCE) open();
      else close();
    }
    isSwiping = false;
  });

  $slideoutOverlay.on('click', close);
  $('.header__hamburger').on('click', () => (isOpen ? close() : open()));
  $(window).on('resize', () => {
    handleNavbar();
    if (!isMobileLayout()) close();
  });
  setInterval(handleNavbar, 3000);
}, () => {
  $trigger = $(tpl`
    <li class="nav__list-item nav_more" data-dropdown-pos="bottom right" data-dropdown-target="#menu-nav-more">
      <a href="javascript:;" class="nav__item">
        ${i18n('More')} <span class="icon icon-expand_more"></span>
      </a>
    </li>
  `);
  $menu = $('<ol class="dropdown-target menu menu_more" id="menu-nav-more">');
  $trigger.append($menu);
  $('.nav__list--main').append($trigger);

  handleNavbar();
});

export default navigationPage;