import React from 'react';
import { observer } from 'mobx-react-lite';
import cn from 'classnames';
import { PlayerContext } from 'Components/Session/playerContext';
import { useModal } from 'Components/Modal';
import Tab from './Tab';
import { useTranslation } from 'react-i18next';

interface Props {
  tabs: { tab: string; idx: number }[];
  currentTab: string;
  changeTab: (tab: string) => void;
  hideModal: () => void;
}

const DISPLAY_LIMIT = 5;

function Modal({ tabs, currentTab, changeTab, hideModal }: Props) {
  const { t } = useTranslation();
  return (
    <div className="h-screen overflow-y-scroll">
      <div className="text-2xl font-semibold p-4">
        {tabs.length} {t('Tabs')}
      </div>
      {tabs.map((tab, i) => (
        <div
          key={tab.idx}
          onClick={() => {
            changeTab(tab.tab);
            hideModal();
          }}
          className={cn(
            currentTab === tab.tab ? 'font-semibold ' : 'text-disabled-text',
            'cursor-pointer border-b p-4 hover:bg-active-blue',
          )}
        >
          {t('Tab')}&nbsp;{i + 1}
        </div>
      ))}
    </div>
  );
}

function SessionTabs({ isLive }: { isLive?: boolean }) {
  const { t } = useTranslation();
  const { showModal, hideModal } = useModal();
  const { player, store } = React.useContext(PlayerContext);
  const {
    tabs = new Set('back-compat'),
    currentTab,
    closedTabs,
    tabNames,
  } = store.get();

  const tabsArr = Array.from(tabs).map((tab, idx) => ({
    tab,
    idx,
    isClosed: closedTabs.includes(tab),
  }));
  const shouldTruncate = tabsArr.length > DISPLAY_LIMIT;
  const actualTabs = shouldTruncate ? tabsArr.slice(0, DISPLAY_LIMIT) : tabsArr;

  const shownTabs =
    actualTabs.findIndex((el) => el.tab === currentTab) !== -1
      ? actualTabs
      : actualTabs.concat({
          tab: currentTab,
          isClosed: false,
          idx: tabsArr.findIndex((tEl) => tEl.tab === currentTab),
        });
  const changeTab = (tab: string) => {
    if (isLive) return;
    player.changeTab(tab);
  };

  const openModal = () => {
    showModal(
      <Modal
        hideModal={hideModal}
        currentTab={currentTab}
        changeTab={changeTab}
        tabs={tabsArr}
      />,
      {
        right: true,
      },
    );
  };
  return (
    <>
      {shownTabs.map((tab, i) => (
        <React.Fragment key={tab.tab}>
          <Tab
            i={tab.idx}
            tab={tab.tab}
            currentTab={actualTabs.length === 1 ? tab.tab : currentTab}
            changeTab={changeTab}
            isLive={isLive}
            isClosed={tab.isClosed}
            name={tabNames[tab.tab]}
          />
        </React.Fragment>
      ))}
      {shouldTruncate ? (
        <div
          onClick={openModal}
          className={cn(
            'self-end py-1 px-4 text-sm',
            'cursor-pointer bg-active-blue text-blue',
            '!border-t-transparent !border-l-transparent !border-r-transparent',
          )}
        >
          +{tabsArr.length - DISPLAY_LIMIT}&nbsp;{t('More')}
        </div>
      ) : null}
    </>
  );
}

export default observer(SessionTabs);