import React, { useState } from 'react';
import { useDispatch } from 'react-redux';
import {
  Divider, Typography, IconButton, useMediaQuery, Toolbar,
} from '@mui/material';
import makeStyles from '@mui/styles/makeStyles';
import { useTheme } from '@mui/material/styles';
import Drawer from '@mui/material/Drawer';
import ArrowBackIcon from '@mui/icons-material/ArrowBack';
import UploadFileIcon from '@mui/icons-material/UploadFile';
import { useNavigate } from 'react-router-dom';
import MapView from '../map/core/MapView';
import MapCurrentLocation from '../map/MapCurrentLocation';
import MapGeofenceEdit from '../map/MapGeofenceEdit';
import GeofencesList from './GeofencesList';
import { useTranslation } from '../common/components/LocalizationProvider';
import MapGeocoder from '../map/geocoder/MapGeocoder';
import { errorsActions } from '../store';

const useStyles = makeStyles((theme) => ({
  root: {
    height: '100%',
    display: 'flex',
    flexDirection: 'column',
  },
  content: {
    flexGrow: 1,
    overflow: 'hidden',
    display: 'flex',
    flexDirection: 'row',
    [theme.breakpoints.down('sm')]: {
      flexDirection: 'column-reverse',
    },
  },
  drawerPaper: {
    position: 'relative',
    [theme.breakpoints.up('sm')]: {
      width: theme.dimensions.drawerWidthTablet,
    },
    [theme.breakpoints.down('sm')]: {
      height: theme.dimensions.drawerHeightPhone,
    },
  },
  mapContainer: {
    flexGrow: 1,
  },
  title: {
    flexGrow: 1,
  },
  fileInput: {
    display: 'none',
  },
}));

const GeofencesPage = () => {
  const theme = useTheme();
  const classes = useStyles();
  const dispatch = useDispatch();
  const navigate = useNavigate();
  const t = useTranslation();

  const isPhone = useMediaQuery(theme.breakpoints.down('sm'));

  const [selectedGeofenceId, setSelectedGeofenceId] = useState();

  const handleFile = (event) => {
    const files = Array.from(event.target.files);
    const [file] = files;
    const reader = new FileReader();
    reader.onload = async () => {
      const xml = new DOMParser().parseFromString(reader.result, 'text/xml');
      const segment = xml.getElementsByTagName('trkseg')[0];
      const coordinates = Array.from(segment.getElementsByTagName('trkpt'))
        .map((point) => `${point.getAttribute('lat')} ${point.getAttribute('lon')}`)
        .join(', ');
      const area = `LINESTRING (${coordinates})`;
      const newItem = { name: '', area };
      try {
        const response = await fetch('/api/geofences', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify(newItem),
        });
        if (response.ok) {
          const item = await response.json();
          navigate(`/settings/geofence/${item.id}`);
        } else {
          throw Error(await response.text());
        }
      } catch (error) {
        dispatch(errorsActions.push(error.message));
      }
    };
    reader.onerror = (event) => {
      dispatch(errorsActions.push(event.target.error));
    };
    reader.readAsText(file);
  };

  return (
    <div className={classes.root}>
      <div className={classes.content}>
        <Drawer
          anchor={isPhone ? 'bottom' : 'left'}
          variant="permanent"
          classes={{ paper: classes.drawerPaper }}
        >
          <Toolbar>
            <IconButton edge="start" sx={{ mr: 2 }} onClick={() => navigate(-1)}>
              <ArrowBackIcon />
            </IconButton>
            <Typography variant="h6" className={classes.title}>{t('sharedGeofences')}</Typography>
            <label htmlFor="upload-gpx">
              <input accept=".gpx" id="upload-gpx" type="file" className={classes.fileInput} onChange={handleFile} />
              <IconButton edge="end" component="span" onClick={() => {}}>
                <UploadFileIcon />
              </IconButton>
            </label>
          </Toolbar>
          <Divider />
          <GeofencesList onGeofenceSelected={setSelectedGeofenceId} />
        </Drawer>
        <div className={classes.mapContainer}>
          <MapView>
            <MapGeofenceEdit selectedGeofenceId={selectedGeofenceId} />
          </MapView>
          <MapCurrentLocation />
          <MapGeocoder />
        </div>
      </div>
    </div>
  );
};

export default GeofencesPage;