import React, { Fragment, useEffect, useRef, useState } from 'react';
import { Helmet } from 'react-helmet-async';
import { useAccount, useBufferedFeeds, useSubplebbit } from '@plebbit/plebbit-react-hooks';
import { Link, useNavigate } from 'react-router-dom';
import { Container, Header, Logo, Page, Search, About, AboutTitle, AboutContent, Boards, BoardsTitle, BoardsContent, Footer } from '../styled/views/Home.styled';
import BoardAvatar from '../BoardAvatar';
import OfflineIndicator from '../OfflineIndicator';
import CreateBoardModal from '../modals/CreateBoardModal';
import useGeneralStore from '../../hooks/stores/useGeneralStore';
import packageJson from '../../../package.json';
import { Tooltip } from 'react-tooltip';
const {version} = packageJson;
const commitRef = process?.env?.REACT_APP_COMMIT_REF ? ` ${process.env.REACT_APP_COMMIT_REF.slice(0, 7)}` : '';


const SubplebbitTitle = ({address}) => {
  const subplebbitAddress = address;
  const subplebbit = useSubplebbit({subplebbitAddress});
  const title = subplebbit.title ?? null;

  return (
    <>
      {title ? (
        <span>{title}</span>
      ) : (
        <span style={{userSelect: "none"}}>&nbsp;</span>
      )}
    </>
  )
}


const Home = () => {
  const {
    bodyStyle, setBodyStyle,
    defaultSubplebbits,
    setSelectedAddress, 
    selectedStyle, setSelectedStyle,
    setSelectedTitle
  } = useGeneralStore(state => state);

  const account = useAccount();
  const navigate = useNavigate();
  
  const inputRef = useRef(null);
  const prevStyle = useRef(selectedStyle);
  const prevBodyStyle = useRef(bodyStyle);

  const [isCreateBoardOpen, setIsCreateBoardOpen] = useState(false);

  // preload default subs and subscriptions
  useBufferedFeeds({
    feedsOptions: [
      {subplebbitAddresses: defaultSubplebbits.map(
        (subplebbit) => subplebbit.address
      ), sortType: 'active'},
      {subplebbitAddresses: account?.subscriptions, sortType: 'active'}
    ]
  });

  // prevent dark mode
  useEffect(() => {
    const currentPrevStyle = prevStyle.current;
    const currentPrevBodyStyle = prevBodyStyle.current;

    setBodyStyle({
      background: "#ffe url(assets/fade.png) top repeat-x",
      color: "maroon",
      fontFamily: "Helvetica, Arial, sans-serif"
    });
    setSelectedStyle("Yotsuba");

    return () => {
      setSelectedStyle(currentPrevStyle);
      setBodyStyle(currentPrevBodyStyle);
    };
  }, [setBodyStyle, setSelectedStyle]);


  return (
    <>
      <CreateBoardModal
      selectedStyle={selectedStyle}
      isOpen={isCreateBoardOpen}
      closeModal={() => setIsCreateBoardOpen(false)} />
      <Helmet>
        <title>plebchan</title>
      </Helmet>
      <Container>
        <Tooltip id="tooltip" className="tooltip" />
        <Header>
          <Logo>
            <Link to="/">
              <img alt="plebchan" src="assets/logo/logo-transparent.png" />
            </Link>
          </Logo>
        </Header>
        <Page>
          <Search>
            <input type="text" placeholder='"board.eth" or "12D3KooW..."' ref={inputRef} onKeyDown={
              (event) => {
                if (event.key === "Enter") {
                  event.preventDefault();
                  const address = inputRef.current.value;
                  if (address) {
                    setSelectedAddress(address);
                    navigate(`/p/${address}`)
                  }
                }
            }} />
            <input type="submit" value="Search" onClick={
              () => {
                const address = inputRef.current.value;
                if (address) {
                  setSelectedAddress(address);
                  navigate(`/p/${address}`)
                }
              }
            } />
          </Search>
          <About>
            <AboutTitle>
              <h2>What is plebchan?</h2>
            </AboutTitle>
            <AboutContent>
              <div id="content">
                <p>Plebchan is a serverless, adminless, decentralized 4chan alternative that uses the <a href="https://plebbit.com" target="_blank" rel="noreferrer">plebbit protocol</a>. Users do not need to register an account before participating in a community; anyone can post comments, share media links, and <button style={{all: 'unset', cursor: 'pointer'}}
                onClick={() =>{
                  window.electron && window.electron.isElectron ? (
                    setIsCreateBoardOpen(true)
                  ) : (
                    alert(
                      'You can create a board with the desktop version of plebchan:\nhttps://github.com/plebbit/plebchan/releases/latest\n\nIf you are comfortable with the command line, use plebbit-cli:\nhttps://github.com/plebbit/plebbit-cli\n\n'
                    )
                  )
                }}
                >create a board</button>. All the content is just text, and plebchan's speed depends on how many users are <button style={{all: 'unset', cursor: 'pointer'}}
                onClick={() => {
                  alert(
                    'You can seed automatically simply by using the plebchan desktop app, which is a plebbit full node. Download it here:\nhttps://github.com/plebbit/plebchan/releases/latest\n\nIf you are comfortable with the command line, you can use plebbit-cli with the --seed flag:\nhttps://github.com/plebbit/plebbit-cli\n\n'
                  )
                }}
                >seeding</button>. Search for any board address above, or feel free to click on a popular board below that interests you and jump right in! </p>
                <br />
                <p>There are no global rules, each board is completely independent and its owner decides how/if it should be moderated.</p>
              </div>
            </AboutContent>
          </About>
          {account?.subscriptions?.length > 0 ? (
            <Boards>
                <BoardsTitle>
                  <h2>Subscriptions</h2>
                </BoardsTitle>
                <BoardsContent id="subscriptions">
                  <h3 style={{textDecoration: 'underline', display: 'inline'}}>
                    You have subscribed to {account?.subscriptions?.length} board{account?.subscriptions?.length > 1 ? "s" : null}
                  </h3>&nbsp;
                  <Link to="/p/subscriptions" id="view-all" onClick={()=> {window.scrollTo(0, 0)}}>[view all]</Link>
                  <br />
                  {account?.subscriptions?.map((subscription, index) => (
                    <Fragment key={`frag-${index}`}>
                      <Link key={`sub-${index}`} className="boardlink" 
                      onClick={()=> {window.scrollTo(0, 0)}}
                      to={`/p/${subscription}`}>
                        <br id="mobile-br" />
                        {subscription}&nbsp;
                      </Link>
                      <OfflineIndicator 
                        key={`offline-${index}`}
                        address={subscription} 
                        className="disconnected"
                        isText={true} />
                      <br key={`br-${index}`} />
                    </Fragment>
                  ))}
                  <br id="mobile-br" />
                </BoardsContent>
            </Boards>
          ) : null}
          <Boards>
              <BoardsTitle>
                <h2>Popular Boards</h2>
              </BoardsTitle>
              <BoardsContent>
                {defaultSubplebbits.map((subplebbit, index) => (
                  <div className="board" key={`board-${index}`}>
                    <div className="board-title" key="board-title">
                      {subplebbit.title ?? <SubplebbitTitle address={subplebbit.address} />}
                    </div>
                    <div className="board-avatar-container" key="board-avatar-container">
                      <Link to={`/p/${subplebbit.address}`} key="link" onClick={() => {
                        setSelectedTitle(subplebbit.title);
                        setSelectedAddress(subplebbit.address);
                        window.scrollTo(0, 0);
                      }} >
                        <BoardAvatar key="baordavatar" address={subplebbit.address} />
                      </Link>
                      <OfflineIndicator 
                      address={subplebbit.address} 
                      className="offline-indicator"
                      tooltipPlace="top" 
                      key="oi2"/>
                    </div>
                    <div className="board-text" key="bt">
                      <b key="b">{subplebbit.address}</b>
                    </div>
                  </div>
                ))}
              </BoardsContent>
          </Boards>
        </Page>
        <Footer>
          <ul>
            <li className="fill"></li>
            <li className="first">
              <a href="https://etherscan.io/token/0xEA81DaB2e0EcBc6B5c4172DE4c22B6Ef6E55Bd8f" target="_blank" rel="noopener noreferrer">Token</a>
            </li>
            <li>
              <a href="https://gitcoin.co/grants/5515/plebbit-a-serverless-adminless-decentralized-redd" target="_blank" rel="noopener noreferrer">Donate</a>
            </li>
            <li>
              <a href="https://github.com/plebbit/whitepaper/discussions/2" target="_blank" rel="noopener noreferrer">Whitepaper</a>
            </li>
            <li>
              <a href="https://github.com/plebbit/plebchan" target="_blank" rel="noopener noreferrer">GitHub</a>
            </li>
            <li>
              <a href="https://matrix.to/#/#plebbit:plebbitchat.org" target="_blank" rel="noopener noreferrer">Matrix</a>
            </li>
            <li>
              <a href="https://t.me/plebbit" target="_blank" rel="noopener noreferrer">Telegram</a>
            </li>
            <li>
              <a href="https://twitter.com/plebchan_eth" target="_blank" rel="noopener noreferrer">Twitter</a>
            </li>
            <li>
              <a href="https://discord.gg/E7ejphwzGW" target="_blank" rel="noopener noreferrer">Discord</a>
            </li>
          </ul>
        </Footer>
        <div style={{
          textAlign: "center",
          fontSize: "11px",
          marginBottom: "2em",
        }}>
          plebchan v{version}{commitRef}. GPL-2.0
        </div>
      </Container>
    </>
  )
};

export default Home;