import React, { useEffect } from 'react';
import { Route, Routes, useLocation } from 'react-router-dom';
import { Helmet } from 'react-helmet-async';
import useAppStore from './useAppStore';
import Home from './components/views/Home';
import Board from './components/views/Board';
import Thread from './components/views/Thread';
import Catalog from './components/views/Catalog';
import NotFound from './components/views/NotFound';
import styled, { createGlobalStyle } from 'styled-components';
import 'react-tooltip/dist/react-tooltip.css';
import 'react-toastify/dist/ReactToastify.css';
import preloadImages from './utils/preloadImages';
import { ToastContainer } from 'react-toastify';
import { importAll } from './components/ImageBanner';


const GlobalStyle = createGlobalStyle`
  *:focus {
    outline: none;
  }
  
  body {
    margin: 0;
    padding: 0;
    background: ${props => props.background};
    color: ${props => props.color};
    font-family: ${props => props.fontFamily};
  }
  
  .tooltip {
    border-radius: 0;
    max-width: 40%;
    font-size: 11px;
    padding: 3px;
    opacity: 100%;
  }
`;

const StyledContainer = styled(ToastContainer)`
  .Toastify__toast {
    border-radius: 0px;
    font-size: 11pt;
    animation-duration: 0s;
    border: 1px solid #fee9cd;
    color: #c5c8c6;
  }
`;


export default function App() {
  const { 
    bodyStyle, setBodyStyle,
    setDefaultSubplebbits,
    setIsSettingsOpen,
    setSelectedStyle,
    setShowPostForm,
    setShowPostFormLink,
  } = useAppStore(state => state);

  const location = useLocation();
  const isHomeRoute = location.pathname === "/";
  
  // preload banners
  useEffect(() => {
    const loadImages = async () => {
      const images = await importAll(require.context('../public/assets/banners', false, /\.(png|jpe?g|svg)$/));
      const imageUrls = images.map((image) => image.default);
      preloadImages(imageUrls);
    };

    loadImages();
  }, []);


  // automatic dark mode without interefering with user's selected style
  useEffect(() => {
    if (isHomeRoute) return;
  
    const darkModeMediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
    const isDarkMode = darkModeMediaQuery.matches;
  
    if (isDarkMode && !isHomeRoute) {
      setSelectedStyle('Tomorrow');
      setBodyStyle({
        background: '#1d1f21 none',
        color: '#c5c8c6',
        fontFamily: 'Arial, Helvetica, sans-serif'
      });
      localStorage.setItem('selectedStyle', 'Tomorrow');
    }
  
    const darkModeListener = (e) => {
      if (e.matches && !isHomeRoute) {
        setSelectedStyle('Tomorrow');
        setBodyStyle({
          background: '#1d1f21 none',
          color: '#c5c8c6',
          fontFamily: 'Arial, Helvetica, sans-serif'
        });
        localStorage.setItem('selectedStyle', 'Tomorrow');
      }
    };
  
    darkModeMediaQuery.addEventListener('change', darkModeListener);
  
    return () => {
      darkModeMediaQuery.removeEventListener('change', darkModeListener);
    };
  }, [isHomeRoute]);
  
  // fetch default subplebbits
  useEffect(() => {
    let didCancel = false;
    fetch(
      "https://raw.githubusercontent.com/plebbit/temporary-default-subplebbits/master/subplebbits.json",
      { cache: "no-cache" }
    )
      .then((res) => res.json())
      .then(res => {
        if (!didCancel) {
          setDefaultSubplebbits(res);
        }
      });
    return () => {
      didCancel = true;
    };
  }, []);

  // handle nested routes
  useEffect(() => {
    const path = location.pathname;
    if (path.endsWith('/post')) {
      setShowPostFormLink(false);
      setShowPostForm(true);
    } else {
      setShowPostFormLink(true);
      setShowPostForm(false);
    }

    if (path.endsWith('/settings')) {
      setIsSettingsOpen(true);
    } else {
      setIsSettingsOpen(false);
    }
    
  }, [location.pathname]);

  return (
  <div>
    <Helmet>
      <link rel="apple-touch-icon" sizes="180x180" href="/assets/logo/apple-touch-icon.png" />
      <link rel="icon" type="image/png" sizes="32x32" href="/assets/logo/favicon-32x32.png" />
      <link rel="icon" type="image/png" sizes="16x16" href="/assets/logo/favicon-16x16.png" />
      <link rel="manifest" href="/site.webmanifest" />
      <meta name="msapplication-TileColor" content="#fee9cd" />
      <meta name="theme-color" content="#ffffff" />
    </Helmet>
    <GlobalStyle 
    background={bodyStyle.background} 
    color={bodyStyle.color} 
    fontFamily={bodyStyle.fontFamily}
    />
      <Routes>
        <Route exact path='/' element={<Home setBodyStyle={setBodyStyle} />} />
        <Route path={`/:subplebbitAddress`} element={<Board setBodyStyle={setBodyStyle} />}>
          <Route path='post' element={<Board />} />
          <Route path='settings' element={<Board />} />
        </Route>
        <Route path={`/:subplebbitAddress/thread/:threadCid`} element={<Thread setBodyStyle={setBodyStyle} />}>
          <Route path='post' element={<Thread />} />
          <Route path='settings' element={<Thread />} />
        </Route>
        <Route path={`/:subplebbitAddress/catalog`} element={<Catalog setBodyStyle={setBodyStyle} /> }>
          <Route path='post' element={<Catalog />} />
          <Route path='settings' element={<Catalog />} />
        </Route>
        <Route path='*' element={<NotFound setBodyStyle={setBodyStyle} />} />
      </Routes>
      <StyledContainer />
  </div>
)}