import React, { useState, useEffect } from 'react';
import { useSelector } from 'react-redux';

import AppBar from '@material-ui/core/AppBar';
import Toolbar from '@material-ui/core/Toolbar';
import Typography from '@material-ui/core/Typography';
import IconButton from '@material-ui/core/IconButton';
import MenuIcon from '@material-ui/icons/Menu';
import { SwipeableDrawer, SvgIcon, Link, Tooltip } from '@material-ui/core';

import Sidebar from '../Sidebar/Sidebar';
import ActiveUserList from '../ActiveUserList/ActiveUserList';
import { StoreState } from '../../reducers';

export default function Header() {
  // Get State from Redux Store
  const chatStore = useSelector((state: StoreState) => state.chat);
  const { activeChannel, activePMUser, activeView } = chatStore;

  // Local state
  const [sideBarDrawerVisible, setSideBarDrawerVisible] = useState(false);
  const [userListDrawerVisible, setUserListDrawerVisible] = useState(false);
  const [title, setTitle] = useState('');

  // On active view change change title
  useEffect(() => {
    if (activeView === 'servers') {
      setTitle(activeChannel.split('-')[0].toLowerCase());
    } else if (activeView === 'home') {
      setTitle(activePMUser);
    }
  }, [activeView, activePMUser, activeChannel]);

  return (
    <AppBar position="static" className="appbar">
      <Toolbar className="navbar">
        <IconButton
          edge="start"
          color="inherit"
          aria-label="menu"
          className="menu-burger-button"
          onClick={() => setSideBarDrawerVisible(true)}
        >
          <MenuIcon />
        </IconButton>
        <SwipeableDrawer
          anchor="left"
          open={sideBarDrawerVisible}
          onClose={() => setSideBarDrawerVisible(false)}
          onOpen={() => setSideBarDrawerVisible(true)}
        >
          <Sidebar setDrawerVisible={setSideBarDrawerVisible} />
        </SwipeableDrawer>
        <SwipeableDrawer
          anchor="right"
          open={userListDrawerVisible}
          onClose={() => setUserListDrawerVisible(false)}
          onOpen={() => setUserListDrawerVisible(true)}
        >
          <ActiveUserList />
        </SwipeableDrawer>
        <Typography variant="h6">{title} </Typography>
        <Link href="https://github.com/ericellb/React-Discord-Clone" target="_blank" style={{ color: 'white' }}>
          <Tooltip title="Check me out on Github!" className="tooltip">
            <IconButton>
              <SvgIcon>
                <path d="M12.007 0C6.12 0 1.1 4.27.157 10.08c-.944 5.813 2.468 11.45 8.054 13.312.19.064.397.033.555-.084.16-.117.25-.304.244-.5v-2.042c-3.33.735-4.037-1.56-4.037-1.56-.22-.726-.694-1.35-1.334-1.756-1.096-.75.074-.735.074-.735.773.103 1.454.557 1.846 1.23.694 1.21 2.23 1.638 3.45.96.056-.61.327-1.178.766-1.605-2.67-.3-5.462-1.335-5.462-6.002-.02-1.193.42-2.35 1.23-3.226-.327-1.015-.27-2.116.166-3.09 0 0 1.006-.33 3.3 1.23 1.966-.538 4.04-.538 6.003 0 2.295-1.5 3.3-1.23 3.3-1.23.445 1.006.49 2.144.12 3.18.81.877 1.25 2.033 1.23 3.226 0 4.607-2.805 5.627-5.476 5.927.578.583.88 1.386.825 2.206v3.29c-.005.2.092.393.26.507.164.115.377.14.565.063 5.568-1.88 8.956-7.514 8.007-13.313C22.892 4.267 17.884.007 12.008 0z" />
              </SvgIcon>
            </IconButton>
          </Tooltip>
        </Link>
      </Toolbar>
    </AppBar>
  );
}