import { createSelector } from 'reselect';

export const selectState = state => state.app || {};

export const selectPlatform = createSelector(selectState, state => state.platform);

export const selectUpdateUrl = createSelector(selectPlatform, platform => {
  switch (platform) {
    case 'darwin':
      return 'https://lbry.com/get/lbry.dmg';
    case 'linux':
      return 'https://lbry.com/get/lbry.deb';
    case 'win32':
      return 'https://lbry.com/get/lbry.exe';
    default:
      throw Error('Unknown platform');
  }
});

export const selectHasClickedComment = createSelector(selectState, state => state.hasClickedComment);

export const selectRemoteVersion = createSelector(selectState, state => state.remoteVersion);

export const selectIsUpgradeAvailable = createSelector(selectState, state => state.isUpgradeAvailable);

export const selectUpgradeFilename = createSelector(selectPlatform, selectRemoteVersion, (platform, version) => {
  switch (platform) {
    case 'darwin':
      return `LBRY_${version}.dmg`;
    case 'linux':
      return `LBRY_${version}.deb`;
    case 'win32':
      return `LBRY_${version}.exe`;
    default:
      throw Error('Unknown platform');
  }
});

export const selectDownloadProgress = createSelector(selectState, state => state.downloadProgress);

export const selectDownloadComplete = createSelector(selectState, state => state.upgradeDownloadCompleted);

export const selectIsUpgradeSkipped = createSelector(selectState, state => state.isUpgradeSkipped);

export const selectUpgradeDownloadPath = createSelector(selectState, state => state.downloadPath);

export const selectUpgradeDownloadItem = createSelector(selectState, state => state.downloadItem);

export const selectAutoUpdateDownloaded = createSelector(selectState, state => state.autoUpdateDownloaded);

export const selectAutoUpdateDeclined = createSelector(selectState, state => state.autoUpdateDeclined);

export const selectDaemonVersionMatched = createSelector(selectState, state => state.daemonVersionMatched);

export const selectVolume = createSelector(selectState, state => state.volume);

export const selectMute = createSelector(selectState, state => state.muted);

export const selectUpgradeTimer = createSelector(selectState, state => state.checkUpgradeTimer);

export const selectModal = createSelector(selectState, state => {
  if (!state.modal) {
    return null;
  }

  return {
    id: state.modal,
    modalProps: state.modalProps,
  };
});

export const selectSearchOptionsExpanded = createSelector(selectState, state => state.searchOptionsExpanded);

export const selectWelcomeVersion = createSelector(selectState, state => state.welcomeVersion);

export const selectHasNavigated = createSelector(selectState, state => state.hasNavigated);

export const selectAllowAnalytics = createSelector(selectState, state => state.allowAnalytics);

export const selectScrollStartingPosition = createSelector(selectState, state => state.currentScroll);

export const selectIsPasswordSaved = createSelector(selectState, state => state.isPasswordSaved);