import React from 'react';

import Info from '@material-ui/icons/Info';
import Location from '@material-ui/icons/LocationOn';
import Camera from '@material-ui/icons/PhotoCamera';
import Resolution from '@material-ui/icons/Crop';
import Photographer from '@material-ui/icons/Person';
import Download from '@material-ui/icons/GetApp';

const toDataURL = async (url) => {
  const res = await fetch(url);
  return URL.createObjectURL(await res.blob());
};

const downloadImage = async (info) => {
  const link = document.createElement('a');
  link.href = await toDataURL(info.url);
  // todo: make this a bit cleaner
  link.download = `mue-${info.credit.toLowerCase().replaceAll(' ', '-')}-${info.location.toLowerCase().replaceAll(',', '').replaceAll(' ', '-')}.jpg`;
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
  window.stats.postEvent('feature', 'Background download');
};

export default function PhotoInformation(props) {
  const [width, setWidth] = React.useState(0);
  const [height, setHeight] = React.useState(0);

  const language = window.language.widgets.background;

  if (props.info.hidden === true || !props.info.credit) {
    return null;
  }

  // remove unsplash and pexels text
  const photographer = props.info.credit.split(` ${language.unsplash}`)[0].split(` ${language.pexels}`);

  let credit = props.info.credit;
  let photo = language.credit;

  // unsplash and pexels credit
  if (props.info.photographerURL && props.info.photographerURL !== '' && !props.info.offline && props.api) {
    if (props.api === 'unsplash') {
      photo = <a href={props.info.photoURL + '?utm_source=mue'} target='_blank' rel='noopener noreferrer'>{language.credit}</a>;
      credit = <><a href={props.info.photographerURL} target='_blank' rel='noopener noreferrer'>{photographer}</a> <a href='https://unsplash.com?utm_source=mue' target='_blank' rel='noopener noreferrer'>{language.unsplash}</a></>;
    } else {
      photo = <a href={props.info.photoURL} target='_blank' rel='noopener noreferrer'>{language.credit}</a>;
      credit = <><a href={props.info.photographerURL} target='_blank' rel='noopener noreferrer'>{photographer}</a> <a href='https://pexels.com' target='_blank' rel='noopener noreferrer'>{language.pexels}</a></>;
    }
  }

  // get resolution
  const img = new Image();
  img.onload = (event) => {
    setWidth(event.target.width);
    setHeight(event.target.height);
  }
  img.src = (localStorage.getItem('ddgProxy') === 'true' && !props.info.offline && !props.url.startsWith('data:')) ? window.constants.DDG_IMAGE_PROXY + props.url : props.url;

  return (
    <div className='photoInformation'>
      <h1>{photo} <span id='credit'>{credit}</span></h1>
      {localStorage.getItem('photoInformation') !== 'false' ? 
      <>
        <Info className='photoInformationHover'/>
        <div className={props.className || 'infoCard'}>
          <Info className='infoIcon'/>
          <h1>{language.information}</h1>
          <hr/>
          <Location/>
          <span id='infoLocation'>{props.info.location || 'N/A'}</span>
          <Camera/>
          <span id='infoCamera'>{props.info.camera || 'N/A'}</span>
          <Resolution/>
          <span id='infoResolution'>{width}x{height}</span>
          <Photographer/>
          <span>{photographer}</span>
          {(localStorage.getItem('downloadbtn') === 'true') && !props.info.offline && !props.info.photographerURL ? 
            <>
              <Download/>
              <span className='download' onClick={() => downloadImage(props.info)}>{language.download}</span>
            </> : null}
        </div>
      </> : null}
    </div>
  );
}