import { SETTINGS, DAEMON_SETTINGS } from 'lbry-redux';
import { createSelector } from 'reselect';
import homepages from 'homepages';
import { SIMPLE_SITE } from 'config';
import { resolveLanguageAlias, getDefaultHomepageKey, getDefaultLanguage } from 'util/default-languages';

const selectState = (state) => state.settings || {};

export const selectDaemonSettings = createSelector(selectState, (state) => state.daemonSettings);

export const selectDaemonStatus = createSelector(selectState, (state) => state.daemonStatus);

export const selectFfmpegStatus = createSelector(selectDaemonStatus, (status) => status.ffmpeg_status);

export const selectFindingFFmpeg = createSelector(selectState, (state) => state.findingFFmpeg || false);

export const selectClientSettings = createSelector(selectState, (state) => state.clientSettings || {});

export const selectLoadedLanguages = createSelector(selectState, (state) => state.loadedLanguages || {});

export const makeSelectClientSetting = (setting) =>
  createSelector(selectClientSettings, (settings) => (settings ? settings[setting] : undefined));

// refactor me
export const selectShowMatureContent = SIMPLE_SITE
  ? createSelector(() => false)
  : makeSelectClientSetting(SETTINGS.SHOW_MATURE);

// and me
export const selectShowRepostedContent = makeSelectClientSetting(SETTINGS.HIDE_REPOSTS);

export const selectTheme = makeSelectClientSetting(SETTINGS.THEME);
export const selectAutomaticDarkModeEnabled = makeSelectClientSetting(SETTINGS.AUTOMATIC_DARK_MODE_ENABLED);
export const selectIsNight = createSelector(selectState, (state) => state.isNight);

export const selectSavedWalletServers = createSelector(selectState, (state) => state.customWalletServers);

export const selectSharedPreferences = createSelector(selectState, (state) => state.sharedPreferences);

export const makeSelectSharedPreferencesForKey = (key) =>
  createSelector(selectSharedPreferences, (prefs) => (prefs ? prefs[key] : undefined));

export const selectHasWalletServerPrefs = createSelector(
  makeSelectSharedPreferencesForKey(DAEMON_SETTINGS.LBRYUM_SERVERS),
  (servers) => {
    return !!(servers && servers.length);
  }
);

export const selectThemePath = createSelector(
  selectTheme,
  selectAutomaticDarkModeEnabled,
  selectIsNight,
  (theme, automaticDarkModeEnabled, isNight) => {
    const dynamicTheme = automaticDarkModeEnabled && isNight ? 'dark' : theme;
    return dynamicTheme || 'light';
  }
);

export const selectHomepageCode = createSelector(makeSelectClientSetting(SETTINGS.HOMEPAGE), (setting) => {
  return homepages[setting] ? setting : getDefaultHomepageKey();
});

export const selectLanguage = createSelector(makeSelectClientSetting(SETTINGS.LANGUAGE), (setting) => {
  const lang = resolveLanguageAlias(setting) || getDefaultLanguage();
  return lang;
});

export const selectHomepageData = createSelector(
  // using homepage setting,
  selectHomepageCode,
  (homepageCode) => {
    // homepages = { 'en': homepageFile, ... }
    return homepages[homepageCode];
  }
);

export const selectosNotificationsEnabled = makeSelectClientSetting(SETTINGS.OS_NOTIFICATIONS_ENABLED);