import { useMemo, useContext } from 'react';
import { Outlet, useNavigate, useLocation, Navigate } from 'react-router-dom';
import { useTranslation } from 'react-i18next';
import { makeStyles, Theme, createStyles } from '@material-ui/core';
import GlobalEffect from '@/components/layout/GlobalEffect';
import Header from '@/components/layout/Header';
import NavMenu from '@/components/menu/NavMenu';
import { NavMenuItem } from '@/components/menu/Types';
import icons from '@/components/icons/Icons';
import {
  authContext,
  rootContext,
  prometheusContext,
  dataContext,
} from '@/context';
import Overview from '@/pages/overview/Overview';

const useStyles = makeStyles((theme: Theme) =>
  createStyles({
    root: {
      minHeight: '100vh',
      backgroundColor: '#f5f5f5',
    },
    content: {
      display: 'flex',

      '& .active': {
        '& path': {
          fill: theme.palette.attuGrey.dark,
        },
      },

      '& .normal': {
        '& path': {
          fill: theme.palette.primary.main,
        },
      },
    },
    body: {
      flex: 1,
      display: 'flex',
      flexDirection: 'column',
      height: '100vh',
      overflowY: 'scroll',
    },
  })
);

function Index() {
  const navigate = useNavigate();
  const { isAuth, isManaged } = useContext(authContext);
  const { isPrometheusReady } = useContext(prometheusContext);
  const { database } = useContext(dataContext);
  const { versionInfo } = useContext(rootContext);
  const { t: navTrans } = useTranslation('nav');
  const classes = useStyles();
  const location = useLocation();
  const isIndex = location.pathname === '/';
  const defaultActive = useMemo(() => {
    if (location.pathname.includes('databases')) {
      return navTrans('database');
    }
    if (location.pathname.includes('db-admin')) {
      return navTrans('dbAdmin');
    }

    if (location.pathname.includes('search')) {
      return navTrans('search');
    }

    if (location.pathname.includes('system')) {
      return navTrans('system');
    }

    if (location.pathname.includes('users') || location.pathname.includes('roles')) {
      return navTrans('user');
    }

    return navTrans('overview');
  }, [location, navTrans]);

  const menuItems: NavMenuItem[] = [
    {
      icon: icons.navOverview,
      label: navTrans('overview'),
      onClick: () => navigate('/'),
    },
    {
      icon: icons.database,
      label: navTrans('database'),
      onClick: () => navigate(`/databases/${database}`),
    },
    {
      icon: icons.navSearch,
      label: navTrans('search'),
      onClick: () => navigate('/search'),
      iconActiveClass: 'normal',
      iconNormalClass: 'active',
    },
  ];

  if (!isManaged) {
    menuItems.push(
      {
        icon: icons.navPerson,
        label: navTrans('user'),
        onClick: () => navigate('/users'),
      },
      {
        icon: icons.navSystem,
        label: navTrans('system'),
        onClick: () =>
          isPrometheusReady ? navigate('/system_healthy') : navigate('/system'),
        iconActiveClass: 'normal',
        iconNormalClass: 'active',
      },
      {
        icon: icons.settings,
        label: navTrans('dbAdmin'),
        onClick: () => navigate('/db-admin'),
      }
    );
  }

  // check if is connected
  if (!isAuth) {
    return <Navigate to="/connect" />;
  }

  return (
    <>
      <div className={classes.root}>
        <GlobalEffect>
          <div className={classes.content}>
            <NavMenu
              width="172px"
              data={menuItems}
              defaultActive={defaultActive}
              // used for nested child menu
              defaultOpen={{ [navTrans('overview')]: true }}
              versionInfo={versionInfo}
            />

            <div className={classes.body}>
              <Header />
              {isIndex ? <Overview /> : <Outlet />}
            </div>
          </div>
        </GlobalEffect>
      </div>
    </>
  );
}

export default Index;