import { NavigationProp } from '@react-navigation/native';
import { Dirs, FileSystem } from 'react-native-file-access';
import { extension } from 'react-native-mime-types';
import Share from 'react-native-share';
import Clipboard from '@react-native-clipboard/clipboard';
import { Meme } from '../database';
import { ROUTE, RootStackParamList } from '../types';
import { noOp } from './constants';

const favoriteMeme = (realm: Realm, meme: Meme) => {
  realm.write(() => {
    meme.isFavorite = !meme.isFavorite;
  });
};

const shareMeme = async (meme: Meme) => {
  const fileExtension = extension(meme.mimeType) as string;
  const cacheUri = `${Dirs.CacheDir}/${meme.id.toHexString()}.${fileExtension}`;
  await FileSystem.cp(meme.uri, cacheUri);
  await Share.open({
    url: `file://${cacheUri}`,
    type: meme.mimeType,
    failOnCancel: false,
  });
};

const copyMeme = async (meme: Meme) => {
  const exists = await FileSystem.exists(meme.uri);
  if (!exists) throw new Error('File does not exist');
  Clipboard.setURI(meme.uri);
};

const editMeme = (
  navigation: NavigationProp<RootStackParamList>,
  meme: Meme,
) => {
  navigation.navigate(ROUTE.EDIT_MEME, { id: meme.id.toHexString() });
};

const deleteMeme = async (realm: Realm, meme: Meme) => {
  await FileSystem.unlink(meme.uri).catch(noOp);

  realm.write(() => {
    for (const tag of meme.tags) {
      tag.dateModified = new Date();
      tag.memes.slice(tag.memes.indexOf(meme), 1);
      tag.memesLength -= 1;
    }

    realm.delete(meme);
  });
};

export { favoriteMeme, shareMeme, copyMeme, editMeme, deleteMeme };