All files / src/components SettingsPanel.tsx

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import { defaultSettings, search } from '@/../config.json';
import { useAppContext } from '@/components/SearchPanel/hooks/useContext';
import { ACTION_TYPE, IDB_STORE } from '@/constants/common';
import { COUNTRIES } from '@/constants/countries';
import { CURRENCIES } from '@/constants/currency';
import { FUZZ_SCORER_NAMES } from '@/constants/fuzzScorers';
import { getCurrencyRate } from '@/helpers/currency';
import { reloadPage } from '@/helpers/dom';
import {
  loadExcludedProducts,
  removeExcludedProduct,
  type ExcludedProductsMap,
} from '@/helpers/excludedProducts';
import { getAvailableLocales, i18n } from '@/helpers/i18n';
import { formatBytes, formatTimestamp, getLanguageName } from '@/helpers/utils';
// Names only, from a dependency-free constant — importing SupplierFactory here
// would pull every supplier implementation into the options-page bundle.
import { showReportDialog } from '@/components/ReportDialog';
import { SUPPLIER_CLASS_NAMES } from '@/constants/suppliers';
import {
  clearAllCaches,
  clearExcludedProducts,
  clearExports,
  clearPriceHistory,
  clearSupplierProductDataCache,
  clearSupplierQueryCache,
  getAllPriceSeries,
  getIdbStorageBreakdown,
} from '@/utils/idbCache';
import { cstorage } from '@/utils/storage';
import { Logger, REMOTE_LOG_LEVELS } from '@/utils/Logger';
import { isButtonElement, isValidUserSettings } from '@/utils/typeGuards/common';
import BugReportIcon from '@mui/icons-material/BugReport';
import DeleteIcon from '@mui/icons-material/Delete';
import ExpandMoreIcon from '@mui/icons-material/ExpandMore';
import TextDecreaseIcon from '@mui/icons-material/TextDecrease';
import TextFormatIcon from '@mui/icons-material/TextFormat';
import TextIncreaseIcon from '@mui/icons-material/TextIncrease';
import Accordion from '@mui/material/Accordion';
import AccordionDetails from '@mui/material/AccordionDetails';
import AccordionSummary from '@mui/material/AccordionSummary';
import Autocomplete, { createFilterOptions } from '@mui/material/Autocomplete';
import Box from '@mui/material/Box';
import Button from '@mui/material/Button';
import ButtonGroup from '@mui/material/ButtonGroup';
import Checkbox from '@mui/material/Checkbox';
import Dialog from '@mui/material/Dialog';
import DialogActions from '@mui/material/DialogActions';
import DialogContent from '@mui/material/DialogContent';
import DialogContentText from '@mui/material/DialogContentText';
import DialogTitle from '@mui/material/DialogTitle';
import FormControl from '@mui/material/FormControl';
import FormControlLabel from '@mui/material/FormControlLabel';
//import FormHelperText from "@mui/material/FormHelperText";
import IconButton from '@mui/material/IconButton';
import Link from '@mui/material/Link';
import List from '@mui/material/List';
import ListItem from '@mui/material/ListItem';
import ListItemText from '@mui/material/ListItemText';
import MenuItem from '@mui/material/MenuItem';
import Select, { SelectChangeEvent } from '@mui/material/Select';
import Stack from '@mui/material/Stack';
import Switch from '@mui/material/Switch';
import TextField from '@mui/material/TextField';
import Tooltip from '@mui/material/Tooltip';
import Typography from '@mui/material/Typography';
import {
  ChangeEvent,
  MouseEvent,
  SyntheticEvent,
  startTransition,
  useActionState,
  useEffect,
  useState,
} from 'react';
import styles from './SettingsPanel.module.scss';
import { getErrorMessage } from '@/helpers/exceptions';
 
const logger = new Logger('SettingsPanel');
 
// Languages the extension ships a translation (`messages.json`) for. Derived at
// build time from src/_locales, so adding a locale folder adds a dropdown option.
const AVAILABLE_LOCALES = getAvailableLocales();
 
// Clean, validated shipped defaults. "Restore Defaults" rebuilds the settings
// object from this so stale/corrupted keys don't survive (see RESTORE_DEFAULTS).
const DEFAULT_SETTINGS: UserSettings = isValidUserSettings(defaultSettings) ? defaultSettings : {};
 
// SettingAction type is declared globally in types/settings.d.ts
 
// Cap the country menu (250+ entries) so it stays short; users narrow by typing.
const countryFilter = createFilterOptions<{ code: string; name: string }>({
  limit: 15,
  stringify: (option) => `${option.name} ${option.code}`,
});
// No limit for currency: with a 15-cap the alphabetical first page (AED…BHD) hid
// common codes like USD unless the user knew to type them. The full list stays
// scrollable and still narrows on type.
const currencyFilter = createFilterOptions<{ code: string; symbol: string }>({
  stringify: (option) => `${option.code} ${option.symbol}`,
});
 
/**
 * Compute a factor that scales a store's serialized JSON size up to its real
 * on-disk footprint. It's the origin's actual storage usage (from
 * `navigator.storage.estimate()`) divided by the summed JSON size of every
 * IndexedDB store, so multiplying a store's JSON bytes by it apportions the true
 * usage (indexes, keys, encoding overhead) proportionally. Falls back to `1`
 * when the estimate is unavailable, yielding the raw JSON size.
 * @param jsonTotalBytes - Summed JSON byte size across all IndexedDB stores.
 * @returns The usage-to-JSON scale factor, or `1` when no estimate is available.
 * @example
 * ```ts
 * const scale = await getStorageUsageScale(50_000); // e.g. 1.4 when usage is 70 KB
 * ```
 * @source
 */
async function getStorageUsageScale(jsonTotalBytes: number): Promise<number> {
  if (jsonTotalBytes <= 0) return 1;
  try {
    const usage = (await navigator.storage?.estimate?.())?.usage;
    if (usage && usage > 0) return usage / jsonTotalBytes;
  } catch (error) {
    logger.warn(`Failed to read storage estimate: ${getErrorMessage(error)}`, { error });
  }
  return 1;
}
 
/**
 * The full settings panel shown in the drawer's Settings tab. Renders all user
 * preference controls (currencies, locations, toggles, numeric limits, excluded
 * products, etc.) and persists changes to `userSettings` via app context.
 * @returns The settings panel element.
 * @example
 * ```tsx
 * // Rendered inside the Settings drawer tab.
 * <SettingsPanel />
 * ```
 * @source
 */
export default function SettingsPanel() {
  const appContext = useAppContext();
  const [expanded, setExpanded] = useState<string | false>('behavior');
  // Developer-only fuzz controls stay hidden until the Konami hotkey unlocks them.
  const advancedMode = appContext?.advancedMode ?? false;
 
  if (!appContext) {
    return <div>{i18n('settings_loading')}</div>;
  }
 
  const [formState, updateSetting, isPending] = useActionState(
    (currentSettings: UserSettings, action: SettingAction): UserSettings => {
      let newSettings: UserSettings;
      switch (action.type) {
        case ACTION_TYPE.SWITCH_CHANGE:
          newSettings = { ...currentSettings, [action.name]: action.checked };
          break;
        case ACTION_TYPE.NESTED_SWITCH_CHANGE:
          newSettings = {
            ...currentSettings,
            [action.group]: { ...currentSettings[action.group], [action.name]: action.checked },
          };
          break;
        case ACTION_TYPE.NESTED_BUTTON_CLICK:
          newSettings = {
            ...currentSettings,
            [action.group]: { ...currentSettings[action.group], [action.name]: action.value },
          };
          break;
        case ACTION_TYPE.INPUT_CHANGE:
          newSettings = { ...currentSettings, [action.name]: action.value };
          break;
        case ACTION_TYPE.SUPPLIER_TOGGLE:
          newSettings = {
            ...currentSettings,
            suppliers: { ...currentSettings.suppliers, disabled: action.value },
          };
          break;
        case ACTION_TYPE.PRICE_TRACKING_CHANGE:
          newSettings = { ...currentSettings, priceTracking: action.value };
          break;
        case ACTION_TYPE.CACHE_CHANGE:
          newSettings = { ...currentSettings, caching: action.value };
          break;
        case ACTION_TYPE.REMOTE_LOG_LEVELS_CHANGE:
          newSettings = { ...currentSettings, remoteLogLevels: action.value };
          break;
        case ACTION_TYPE.RESTORE_DEFAULTS:
          // Rebuild the whole object from the clean shipped defaults (not a spread
          // of currentSettings), so any stale or corrupted keys are dropped — the
          // persisted `user_settings` value is replaced wholesale. The user's
          // locale, currency, and theme are kept.
          newSettings = {
            ...DEFAULT_SETTINGS,
            currency: currentSettings.currency ?? DEFAULT_SETTINGS.currency,
            location: currentSettings.location ?? DEFAULT_SETTINGS.location,
            language: currentSettings.language ?? DEFAULT_SETTINGS.language,
            currencyRate: currentSettings.currencyRate ?? DEFAULT_SETTINGS.currencyRate,
            display: {
              ...DEFAULT_SETTINGS.display,
              theme: currentSettings.display?.theme ?? DEFAULT_SETTINGS.display?.theme,
            },
          };
          break;
        default:
          return currentSettings;
      }
      startTransition(() => {
        try {
          appContext.setUserSettings(newSettings);
        } catch (error) {
          logger.error(`Failed to update settings: ${getErrorMessage(error)}`, { error });
        }
      });
      return newSettings;
    },
    appContext.userSettings,
  );
 
  const handleSwitchChange = (event: ChangeEvent<HTMLInputElement>) => {
    updateSetting({
      type: ACTION_TYPE.SWITCH_CHANGE,
      name: event.target.name,
      checked: event.target.checked,
    });
  };
 
  const handleNestedSwitchChange =
    (group: SettingGroup) => (event: ChangeEvent<HTMLInputElement>) => {
      updateSetting({
        type: ACTION_TYPE.NESTED_SWITCH_CHANGE,
        group,
        name: event.target.name,
        checked: event.target.checked,
      });
    };
 
  const handleNestedButtonClick = (group: SettingGroup) => (event: MouseEvent<HTMLDivElement>) => {
    if (!isButtonElement(event.target)) return;
    const { name, value } = event.target;
    if (name && value) {
      updateSetting({ type: ACTION_TYPE.NESTED_BUTTON_CLICK, group, name, value });
    }
  };
 
  const handleInputChange = (
    event: SelectChangeEvent | ChangeEvent<HTMLInputElement | HTMLTextAreaElement>,
  ) => {
    updateSetting({
      type: ACTION_TYPE.INPUT_CHANGE,
      name: event.target.name,
      value: event.target.value,
    });
  };
 
  const handleRemoteLogLevelsChange = (
    event: ChangeEvent<HTMLInputElement | HTMLTextAreaElement>,
  ) => {
    const { value } = event.target;
    // A multi-select reports an array; autofill can report a comma-joined string.
    const selected: string[] = typeof value === 'string' ? value.split(',') : value;
    updateSetting({
      type: ACTION_TYPE.REMOTE_LOG_LEVELS_CHANGE,
      value: REMOTE_LOG_LEVELS.filter((level) => selected.includes(level)),
    });
  };
 
  const handleRestoreDefaults = () => {
    updateSetting({ type: ACTION_TYPE.RESTORE_DEFAULTS });
  };
 
  const [excludedProducts, setExcludedProducts] = useState<ExcludedProductsMap>({});
  const [priceHistoryCleared, setPriceHistoryCleared] = useState(false);
  const [cacheCleared, setCacheCleared] = useState(false);
  const [fullResetConfirmOpen, setFullResetConfirmOpen] = useState(false);
  const [cacheStats, setCacheStats] = useState<{ records: number; bytes: number }>();
  const [priceStats, setPriceStats] = useState<{
    products: number;
    points: number;
    bytes: number;
  }>();
 
  useEffect(() => {
    const load = async () => {
      try {
        const map = await loadExcludedProducts();
        setExcludedProducts(map);
      } catch (error) {
        logger.warn(`Failed to load excluded products: ${getErrorMessage(error)}`, { error });
      }
    };
    load();
  }, []);
 
  // Loads cache + price-history stats in one pass. Sizes are the stores' JSON
  // byte sizes scaled by the origin's real storage usage, so they reflect the
  // true on-disk footprint rather than the raw serialized size. Cache records
  // combine the query and product-detail caches (variants live inline in product
  // entries, so they're counted within the product cache, not a separate store).
  const loadStorageStats = async () => {
    try {
      const [breakdown, series] = await Promise.all([
        getIdbStorageBreakdown(),
        getAllPriceSeries(),
      ]);
      const scale = await getStorageUsageScale(breakdown.totalBytes);
 
      const queryStore = breakdown.byStore[IDB_STORE.SUPPLIER_QUERY_CACHE];
      const productStore = breakdown.byStore[IDB_STORE.SUPPLIER_PRODUCT_DATA_CACHE];
      setCacheStats({
        records: queryStore.count + productStore.count,
        bytes: Math.round((queryStore.bytes + productStore.bytes) * scale),
      });
 
      setPriceStats({
        products: new Set(series.map((entry) => entry.productKey)).size,
        points: series.reduce((sum, entry) => sum + entry.points.length, 0),
        bytes: Math.round(breakdown.byStore[IDB_STORE.PRICE_HISTORY].bytes * scale),
      });
    } catch (error) {
      logger.warn(`Failed to load storage stats: ${getErrorMessage(error)}`, { error });
    }
  };
 
  useEffect(() => {
    void loadStorageStats();
  }, []);
 
  const handleRemoveExcluded = async (key: string) => {
    try {
      await removeExcludedProduct(key);
      setExcludedProducts((prev) => {
        const next = { ...prev };
        delete next[key];
        return next;
      });
    } catch (error) {
      logger.warn(`Failed to remove excluded product: ${getErrorMessage(error)}`, { error });
    }
  };
 
  const handleClearAllExcluded = async () => {
    try {
      await clearExcludedProducts();
      setExcludedProducts({});
    } catch (error) {
      logger.warn(`Failed to clear excluded products: ${getErrorMessage(error)}`, { error });
    }
  };
 
  const handleClearPriceHistory = async () => {
    try {
      await clearPriceHistory();
      setPriceHistoryCleared(true);
      await loadStorageStats();
    } catch (error) {
      logger.warn(`Failed to clear price history: ${getErrorMessage(error)}`, { error });
    }
  };
 
  // Clears the supplier query cache and product-detail cache (leaving price
  // history and other stores untouched), then refreshes the displayed stats.
  const handleClearCache = async () => {
    try {
      await Promise.all([clearSupplierQueryCache(), clearSupplierProductDataCache()]);
      setCacheCleared(true);
      await loadStorageStats();
    } catch (error) {
      logger.warn(`Failed to clear cache: ${getErrorMessage(error)}`, { error });
    }
  };
 
  // Full reset: wipe every persisted store — all IndexedDB stores except `app_meta`
  // (the migration version marker, kept so migrations don't re-run) and the entire
  // chrome.storage.local area — then reload so all in-memory state rebuilds from the
  // cleared storage and settings fall back to their defaults.
  const handleFullReset = async () => {
    setFullResetConfirmOpen(false);
    try {
      await Promise.all([clearAllCaches(), clearPriceHistory(), clearExports()]);
      await cstorage.local.clear();
      reloadPage();
    } catch (error) {
      logger.warn(`Failed to perform full reset: ${getErrorMessage(error)}`, { error });
    }
  };
 
  const excludedEntries = Object.entries(excludedProducts).sort(
    ([, a], [, b]) => b.excludedAt - a.excludedAt,
  );
  const excludedCount = excludedEntries.length;
 
  const currentSettings = formState || appContext.userSettings;
  const selectedRemoteLogLevels =
    currentSettings.remoteLogLevels ?? DEFAULT_SETTINGS.remoteLogLevels ?? [];
  const disabledSupplierCount = (currentSettings.suppliers?.disabled ?? []).length;
 
  // Toggles a supplier's disabled state. Switch on = enabled, so toggling off adds the
  // supplier's class name to the disabled deny-list and toggling on removes it.
  const handleSupplierToggle = (supplierClassName: SupplierClassName) => () => {
    const disabled = currentSettings.suppliers?.disabled ?? [];
    const next = disabled.includes(supplierClassName)
      ? disabled.filter((name) => name !== supplierClassName)
      : [...disabled, supplierClassName];
    updateSetting({ type: ACTION_TYPE.SUPPLIER_TOGGLE, value: next });
  };
 
  // The language setting may be stored as a full locale (e.g. "en-US") while the
  // dropdown lists base locale codes ("en", "pl") that have a translation. Match
  // on the base code, and fall back to empty when the stored language has no
  // shipped translation so the Select doesn't render an out-of-range value.
  const currentLanguageBase = (currentSettings.language ?? '').split('-')[0];
  const selectedLanguage = AVAILABLE_LOCALES.includes(currentLanguageBase)
    ? currentLanguageBase
    : '';
 
  // Cache TTL is entered in minutes; the hint below the input shows its day
  // equivalent, recomputed 0.5s after the user stops typing so it doesn't churn on
  // every keystroke. The debounced value holds minutes; the label is formatted each
  // render so it also follows a locale switch.
  const cacheTtlMinutes = Number(currentSettings.caching?.ttlMinutes ?? 0);
  // When caching is off, its dependent options (empty-result handling, TTL) have no
  // effect, so they're disabled to avoid configuring settings that do nothing.
  const cachingEnabled = currentSettings.caching?.enabled ?? true;
  const [debouncedTtlMinutes, setDebouncedTtlMinutes] = useState(cacheTtlMinutes);
  useEffect(() => {
    const timer = setTimeout(() => setDebouncedTtlMinutes(cacheTtlMinutes), 500);
    return () => clearTimeout(timer);
  }, [cacheTtlMinutes]);
  const cacheTtlDays = Math.round((debouncedTtlMinutes / 1440) * 100) / 100;
  const cacheTtlDaysLabel =
    debouncedTtlMinutes > 0
      ? i18n(cacheTtlDays === 1 ? 'settings_cache_ttl_days_one' : 'settings_cache_ttl_days_other', [
          String(cacheTtlDays),
        ])
      : undefined;
 
  // Fetch the live USD→currency rate for the selected currency and show it under
  // the dropdown. Fetched directly (not read from stored settings) so the hint
  // always reflects the current selection; getCurrencyRate is LRU-cached, so this
  // returns the same value the price table converts with. Hidden for USD (rate 1).
  const selectedCurrency = currentSettings.currency;
  const [displayRate, setDisplayRate] = useState<number | undefined>(undefined);
  useEffect(() => {
    if (!selectedCurrency || selectedCurrency === 'USD') {
      setDisplayRate(undefined);
      return;
    }
    let cancelled = false;
    const loadRate = async () => {
      try {
        const rate = await getCurrencyRate('USD', selectedCurrency);
        if (!cancelled) setDisplayRate(rate);
      } catch (error) {
        logger.error(`Failed to fetch currency rate for display: ${getErrorMessage(error)}`, {
          error,
        });
        if (!cancelled) setDisplayRate(undefined);
      }
    };
    void loadRate();
    return () => {
      cancelled = true;
    };
  }, [selectedCurrency]);
 
  const currencyRateHint =
    selectedCurrency && selectedCurrency !== 'USD' && displayRate !== undefined
      ? i18n('settings_currency_rate_hint', [
          new Intl.NumberFormat(undefined, { maximumFractionDigits: 4 }).format(displayRate),
          selectedCurrency,
        ])
      : undefined;
 
  const handleAccordionChange =
    (panel: string) => (_event: SyntheticEvent, isExpanded: boolean) => {
      setExpanded(isExpanded ? panel : false);
    };
 
  return (
    <Box>
      <Accordion
        expanded={expanded === 'behavior'}
        onChange={handleAccordionChange('behavior')}
        disableGutters
      >
        <AccordionSummary
          expandIcon={<ExpandMoreIcon />}
          className={styles['settings-panel__accordion-summary']}
        >
          <Typography variant="body2" fontWeight={500}>
            {i18n('settings_section_behavior')}
          </Typography>
        </AccordionSummary>
        <AccordionDetails className={styles['settings-panel__accordion-details']}>
          <List dense component="nav" aria-labelledby="behavior-list-subheader">
            {/* Currency — laid out as a column so the rate hint sits on its own
                right-aligned row below the dropdown (no wrap, and the label/dropdown
                row above it doesn't shift when the hint appears). */}
            <ListItem
              className={styles['settings-panel__helper-on-hover']}
              sx={{ flexDirection: 'column', alignItems: 'stretch', rowGap: 0.5 }}
            >
              <Box sx={{ display: 'flex', alignItems: 'center', width: '100%' }}>
                <ListItemText primary={i18n('settings_currency')} />
                <FormControl>
                  <Autocomplete
                    options={CURRENCIES}
                    getOptionLabel={(option) => `${option.code} (${option.symbol})`}
                    isOptionEqualToValue={(option, value) => option.code === value.code}
                    filterOptions={currencyFilter}
                    value={CURRENCIES.find((c) => c.code === currentSettings.currency) ?? undefined}
                    onChange={(_event, option) =>
                      updateSetting({
                        type: ACTION_TYPE.INPUT_CHANGE,
                        name: 'currency',
                        value: option?.code ?? '',
                      })
                    }
                    size="small"
                    className={styles['settings-panel__input']}
                    disabled={isPending}
                    disableClearable
                    renderInput={(params) => (
                      <TextField {...params} placeholder={i18n('settings_currency')} />
                    )}
                  />
                </FormControl>
              </Box>
              {currencyRateHint && (
                <Typography
                  variant="caption"
                  color="text.secondary"
                  sx={{ alignSelf: 'flex-end', whiteSpace: 'nowrap' }}
                >
                  {currencyRateHint}
                </Typography>
              )}
            </ListItem>
            {/* Location */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText primary={i18n('settings_location')} />
              {/*<FormHelperText>Your country</FormHelperText>*/}
              <FormControl>
                <Autocomplete
                  options={COUNTRIES}
                  getOptionLabel={(option) => option.name}
                  isOptionEqualToValue={(option, value) => option.code === value.code}
                  filterOptions={countryFilter}
                  value={COUNTRIES.find((c) => c.code === currentSettings.location) ?? null}
                  onChange={(_event, option) =>
                    updateSetting({
                      type: ACTION_TYPE.INPUT_CHANGE,
                      name: 'location',
                      value: option?.code ?? '',
                    })
                  }
                  size="small"
                  className={styles['settings-panel__input']}
                  disabled={isPending}
                  renderInput={(params) => (
                    <TextField {...params} placeholder={i18n('settings_location_placeholder')} />
                  )}
                />
              </FormControl>
            </ListItem>
            {/* Language */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText primary={i18n('settings_language')} />
              <FormControl>
                <Select
                  value={selectedLanguage}
                  onChange={handleInputChange}
                  name="language"
                  size="small"
                  style={{ lineHeight: 'inherit' }}
                  className={styles['settings-panel__input']}
                  disabled={isPending}
                >
                  {AVAILABLE_LOCALES.map((localeCode) => (
                    <MenuItem key={localeCode} value={localeCode}>
                      {getLanguageName(localeCode)}
                    </MenuItem>
                  ))}
                </Select>
              </FormControl>
            </ListItem>
            {/* Share usage data — gates the PostHog usage/error events
                (default on; toggling off opts out entirely). Identified by a
                device fingerprint, not fully anonymous — see analytics.ts. */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText
                primary={i18n('settings_share_usage_data')}
                secondary={i18n('settings_share_usage_data_desc')}
              />
              <FormControlLabel
                control={
                  <Switch
                    checked={currentSettings.shareUsageData ?? true}
                    onChange={handleSwitchChange}
                    name="shareUsageData"
                    disabled={isPending}
                  />
                }
                labelPlacement="start"
                label=""
              />
            </ListItem>
          </List>
        </AccordionDetails>
      </Accordion>
      <Accordion
        expanded={expanded === 'cache'}
        onChange={handleAccordionChange('cache')}
        disableGutters
      >
        <AccordionSummary
          expandIcon={<ExpandMoreIcon />}
          className={styles['settings-panel__accordion-summary']}
        >
          <Typography variant="body2" fontWeight={500}>
            {i18n('settings_section_cache')}
          </Typography>
        </AccordionSummary>
        <AccordionDetails className={styles['settings-panel__accordion-details']}>
          <List dense component="nav" aria-labelledby="cache-list-subheader">
            {/* Cache Search Results — master switch for supplier caching */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText primary={i18n('settings_cache_results')} />
              <FormControlLabel
                control={
                  <Switch
                    checked={currentSettings.caching?.enabled ?? true}
                    onChange={(event) =>
                      updateSetting({
                        type: ACTION_TYPE.CACHE_CHANGE,
                        value: { ...currentSettings.caching, enabled: event.target.checked },
                      })
                    }
                    name="caching"
                    disabled={isPending}
                  />
                }
                labelPlacement="start"
                label=""
              />
            </ListItem>
            {/* Do Not Cache Empty Results */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText primary={i18n('settings_do_not_cache_empty')} />
              <FormControlLabel
                control={
                  <Switch
                    checked={Boolean(currentSettings.caching?.doNotCacheEmptyResults)}
                    onChange={(event) =>
                      updateSetting({
                        type: ACTION_TYPE.CACHE_CHANGE,
                        value: {
                          ...currentSettings.caching,
                          doNotCacheEmptyResults: event.target.checked,
                        },
                      })
                    }
                    name="doNotCacheEmptyResults"
                    disabled={isPending || !cachingEnabled}
                  />
                }
                labelPlacement="start"
                label=""
              />
            </ListItem>
            {/* Cache TTL (minutes) — 0 disables expiration */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText primary={i18n('settings_cache_ttl')} />
              <Box
                sx={{
                  display: 'flex',
                  flexDirection: 'column',
                  alignItems: 'flex-end',
                  flexShrink: 0,
                }}
              >
                <FormControl>
                  <TextField
                    value={currentSettings.caching?.ttlMinutes ?? 0}
                    name="cacheTtlMinutes"
                    onChange={(event) =>
                      updateSetting({
                        type: ACTION_TYPE.CACHE_CHANGE,
                        value: {
                          ...currentSettings.caching,
                          ttlMinutes: Math.trunc(Number(event.target.value)),
                        },
                      })
                    }
                    type="number"
                    variant="outlined"
                    size="small"
                    className={`${styles['settings-panel__input']} ${styles['settings-panel__number-input']}`}
                    disabled={isPending || !cachingEnabled}
                    slotProps={{ htmlInput: { min: 0, step: 1 } }}
                  />
                </FormControl>
                {cacheTtlDaysLabel && (
                  <Typography variant="caption" color="text.secondary" sx={{ mt: 0.5 }}>
                    {cacheTtlDaysLabel}
                  </Typography>
                )}
              </Box>
            </ListItem>
            {/* Cache stats + clear button */}
            <ListItem
              className={styles['settings-panel__helper-on-hover']}
              sx={{ flexDirection: 'column', alignItems: 'flex-start', rowGap: 0.5 }}
            >
              <Button
                fullWidth
                variant="outlined"
                color="warning"
                size="small"
                onClick={handleClearCache}
              >
                {i18n('settings_clear_cache')}
              </Button>
              {cacheCleared && (
                <Typography variant="caption">{i18n('settings_cache_cleared')}</Typography>
              )}
              {cacheStats && (
                <Typography variant="caption" color="text.secondary">
                  {i18n('settings_cache_stats', [
                    cacheStats.records.toLocaleString(),
                    formatBytes(cacheStats.bytes),
                  ])}
                </Typography>
              )}
            </ListItem>
          </List>
        </AccordionDetails>
      </Accordion>
      <Accordion
        expanded={expanded === 'priceHistory'}
        onChange={handleAccordionChange('priceHistory')}
        disableGutters
      >
        <AccordionSummary
          expandIcon={<ExpandMoreIcon />}
          className={styles['settings-panel__accordion-summary']}
        >
          <Typography variant="body2" fontWeight={500}>
            {i18n('settings_section_price_history')}
          </Typography>
        </AccordionSummary>
        <AccordionDetails className={styles['settings-panel__accordion-details']}>
          <List dense component="nav" aria-labelledby="price-history-list-subheader">
            {/* Master toggle — on by default */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText
                primary={i18n('settings_track_price_history')}
                secondary={i18n('settings_track_price_history_desc')}
              />
              <FormControlLabel
                control={
                  <Switch
                    checked={currentSettings.priceTracking?.enabled ?? true}
                    onChange={(event) =>
                      updateSetting({
                        type: ACTION_TYPE.PRICE_TRACKING_CHANGE,
                        value: { ...currentSettings.priceTracking, enabled: event.target.checked },
                      })
                    }
                    name="priceTrackingEnabled"
                    disabled={isPending}
                  />
                }
                labelPlacement="start"
                label=""
              />
            </ListItem>
            {/* Max points per product — 0 means unlimited */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText primary={i18n('settings_max_price_points')} />
              <FormControl>
                <TextField
                  value={currentSettings.priceTracking?.maxDataPoints ?? 5}
                  name="priceTrackingMaxDataPoints"
                  onChange={(event) =>
                    updateSetting({
                      type: ACTION_TYPE.PRICE_TRACKING_CHANGE,
                      value: {
                        ...currentSettings.priceTracking,
                        maxDataPoints: Math.trunc(Number(event.target.value)),
                      },
                    })
                  }
                  type="number"
                  variant="outlined"
                  size="small"
                  className={`${styles['settings-panel__input']} ${styles['settings-panel__number-input']}`}
                  disabled={isPending || currentSettings.priceTracking?.enabled === false}
                  slotProps={{ htmlInput: { min: 0, step: 1 } }}
                />
              </FormControl>
            </ListItem>
            <ListItem
              className={styles['settings-panel__helper-on-hover']}
              sx={{ flexDirection: 'column', alignItems: 'flex-start', rowGap: 0.5 }}
            >
              <Button
                fullWidth
                variant="outlined"
                color="warning"
                size="small"
                onClick={handleClearPriceHistory}
              >
                {i18n('settings_clear_price_history')}
              </Button>
              {priceHistoryCleared && (
                <Typography variant="caption">{i18n('settings_price_history_cleared')}</Typography>
              )}
              {priceStats && (
                <Typography variant="caption" color="text.secondary">
                  {i18n('settings_price_history_stats', [
                    priceStats.products.toLocaleString(),
                    priceStats.points.toLocaleString(),
                    formatBytes(priceStats.bytes),
                  ])}
                </Typography>
              )}
            </ListItem>
          </List>
        </AccordionDetails>
      </Accordion>
      <Accordion
        expanded={expanded === 'display'}
        onChange={handleAccordionChange('display')}
        disableGutters
      >
        <AccordionSummary
          expandIcon={<ExpandMoreIcon />}
          className={styles['settings-panel__accordion-summary']}
        >
          <Typography variant="body2" fontWeight={500}>
            {i18n('settings_section_display')}
          </Typography>
        </AccordionSummary>
        <AccordionDetails className={styles['settings-panel__accordion-details']}>
          <List dense component="nav" aria-labelledby="display-list-subheader">
            {/* Font Size */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText primary={i18n('settings_font_size')} />
              {/*<FormHelperText>Popup size</FormHelperText>*/}
              <FormControl>
                <ButtonGroup
                  variant="contained"
                  aria-label={i18n('settings_font_size')}
                  onClick={handleNestedButtonClick('display')}
                  disabled={isPending}
                  // Default grouped-button min-width (40px) overflows the row; 35px fits.
                  sx={{ '& .MuiButtonGroup-grouped': { minWidth: 35 } }}
                >
                  <Button
                    name="fontSize"
                    value="small"
                    size="small"
                    aria-label={i18n('settings_font_small')}
                    title={i18n('settings_font_small')}
                    variant={currentSettings.display?.fontSize === 'small' ? 'contained' : 'text'}
                    disabled={isPending}
                  >
                    <TextDecreaseIcon fontSize="small" sx={{ pointerEvents: 'none' }} />
                  </Button>
                  <Button
                    name="fontSize"
                    value="medium"
                    size="small"
                    aria-label={i18n('settings_font_medium')}
                    title={i18n('settings_font_medium')}
                    variant={currentSettings.display?.fontSize === 'medium' ? 'contained' : 'text'}
                    disabled={isPending}
                  >
                    <TextFormatIcon fontSize="small" sx={{ pointerEvents: 'none' }} />
                  </Button>
                  <Button
                    name="fontSize"
                    value="large"
                    size="small"
                    aria-label={i18n('settings_font_large')}
                    title={i18n('settings_font_large')}
                    variant={currentSettings.display?.fontSize === 'large' ? 'contained' : 'text'}
                    disabled={isPending}
                  >
                    <TextIncreaseIcon fontSize="small" sx={{ pointerEvents: 'none' }} />
                  </Button>
                </ButtonGroup>
              </FormControl>
            </ListItem>
            {/* Open in tab — when on, clicking the toolbar icon opens the full-tab
                view instead of the popup (enforced by the service worker). */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText
                primary={i18n('settings_open_in_tab')}
                secondary={i18n('settings_open_in_tab_desc')}
              />
              <FormControlLabel
                control={
                  <Switch
                    checked={currentSettings.display?.openInTab ?? false}
                    onChange={handleNestedSwitchChange('display')}
                    name="openInTab"
                    disabled={isPending}
                  />
                }
                labelPlacement="start"
                label=""
              />
            </ListItem>
            {/* Auto hide empty columns — when on, columns with no data in the
                current result set are hidden automatically (see ResultsTable). */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText
                primary={i18n('settings_auto_hide_empty_columns')}
                secondary={i18n('settings_auto_hide_empty_columns_desc')}
              />
              <FormControlLabel
                control={
                  <Switch
                    checked={currentSettings.results?.autoHideEmpty ?? true}
                    onChange={handleNestedSwitchChange('results')}
                    name="autoHideEmpty"
                    disabled={isPending}
                  />
                }
                labelPlacement="start"
                label=""
              />
            </ListItem>
 
            {/* Group product variants — when on, variants live under a single
                product row; when off, each variant becomes its own table row so
                sorting/filtering apply across all variants (see ResultsTable). */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText
                primary={i18n('settings_group_product_variants')}
                secondary={i18n('settings_group_product_variants_desc')}
              />
              <FormControlLabel
                control={
                  <Switch
                    checked={currentSettings.search?.groupProductVariants ?? true}
                    onChange={handleNestedSwitchChange('search')}
                    name="groupProductVariants"
                    disabled={isPending}
                  />
                }
                labelPlacement="start"
                label=""
              />
            </ListItem>
 
            {/* Suggest an advanced (AST) query of alternative names when a basic search
                returns nothing. */}
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText
                primary={i18n('settings_suggest_advanced_query')}
                secondary={i18n('settings_suggest_advanced_query_desc')}
              />
              <FormControlLabel
                control={
                  <Switch
                    checked={currentSettings.search?.suggestAdvancedQuery ?? false}
                    onChange={handleNestedSwitchChange('search')}
                    name="suggestAdvancedQuery"
                    disabled={isPending}
                  />
                }
                labelPlacement="start"
                label=""
              />
            </ListItem>
          </List>
        </AccordionDetails>
      </Accordion>
      <Accordion
        expanded={expanded === 'excluded'}
        onChange={handleAccordionChange('excluded')}
        disableGutters
      >
        <AccordionSummary
          expandIcon={<ExpandMoreIcon />}
          className={styles['settings-panel__accordion-summary']}
        >
          <Typography variant="body2" fontWeight={500}>
            {i18n('settings_section_excluded')}
            {excludedCount > 0 && (
              <Typography
                component="span"
                variant="caption"
                color="text.secondary"
                sx={{ ml: 0.5, fontStyle: 'italic' }}
              >
                {i18n('settings_excluded_count', [String(excludedCount)])}
              </Typography>
            )}
          </Typography>
        </AccordionSummary>
        <AccordionDetails className={styles['settings-panel__accordion-details']}>
          {excludedCount === 0 ? (
            <Typography
              variant="caption"
              color="text.secondary"
              className={styles['settings-panel__excluded-empty']}
            >
              {i18n('settings_excluded_empty')}
            </Typography>
          ) : (
            <>
              <List dense disablePadding>
                {excludedEntries.map(([key, entry]) => (
                  <ListItem
                    key={key}
                    divider
                    className={styles['settings-panel__excluded-item']}
                    secondaryAction={
                      <Tooltip title={i18n('settings_remove')}>
                        <IconButton
                          edge="end"
                          size="small"
                          onClick={() => handleRemoveExcluded(key)}
                          className={styles['settings-panel__excluded-delete-btn']}
                          aria-label={i18n('settings_remove_item', [
                            entry.title || entry.url || '',
                          ])}
                        >
                          <DeleteIcon className={styles['settings-panel__excluded-delete-icon']} />
                        </IconButton>
                      </Tooltip>
                    }
                  >
                    <ListItemText
                      primary={
                        <Link
                          href={entry.url}
                          target="_blank"
                          rel="noopener noreferrer"
                          variant="body2"
                          className={styles['settings-panel__excluded-link']}
                        >
                          {entry.title || entry.url}
                        </Link>
                      }
                      secondary={`${entry.supplier} — ${formatTimestamp(entry.excludedAt)}`}
                      slotProps={{
                        secondary: {
                          variant: 'caption',
                          className: styles['settings-panel__excluded-secondary-text'],
                        },
                      }}
                    />
                  </ListItem>
                ))}
              </List>
              <Box className={styles['settings-panel__excluded-actions']}>
                <Button
                  fullWidth
                  variant="outlined"
                  color="warning"
                  size="small"
                  onClick={handleClearAllExcluded}
                >
                  {i18n('settings_clear_all')}
                </Button>
              </Box>
            </>
          )}
        </AccordionDetails>
      </Accordion>
      {/* Per-supplier enable/disable. Each switch on = supplier enabled; toggling
          off adds it to the disabledSuppliers deny-list, excluding it from every
          search and hiding it from the search filter menu. */}
      <Accordion
        expanded={expanded === 'suppliers'}
        onChange={handleAccordionChange('suppliers')}
        disableGutters
      >
        <AccordionSummary
          expandIcon={<ExpandMoreIcon />}
          className={styles['settings-panel__accordion-summary']}
        >
          <Typography variant="body2" fontWeight={500}>
            {i18n('settings_section_supplier_status')}
            {disabledSupplierCount > 0 && (
              <Typography
                component="span"
                variant="caption"
                color="text.secondary"
                sx={{ ml: 0.5, fontStyle: 'italic' }}
              >
                {i18n('settings_supplier_disabled_count', [String(disabledSupplierCount)])}
              </Typography>
            )}
          </Typography>
        </AccordionSummary>
        <AccordionDetails className={styles['settings-panel__accordion-details']}>
          <Typography
            variant="caption"
            sx={{ px: 2, py: 1, display: 'block', fontStyle: 'italic', color: 'text.secondary' }}
          >
            {i18n('settings_supplier_status_desc')}
          </Typography>
          <List dense sx={{ width: '100%' }}>
            {SUPPLIER_CLASS_NAMES.map((supplierClassName) => (
              <ListItem
                key={supplierClassName}
                className={styles['settings-panel__helper-on-hover']}
              >
                <ListItemText primary={supplierClassName.replace(/^Supplier/, '')} />
                <FormControlLabel
                  control={
                    <Switch
                      checked={
                        !(currentSettings.suppliers?.disabled ?? []).includes(supplierClassName)
                      }
                      onChange={handleSupplierToggle(supplierClassName)}
                      name={supplierClassName}
                      disabled={isPending}
                    />
                  }
                  labelPlacement="start"
                  label=""
                />
              </ListItem>
            ))}
          </List>
        </AccordionDetails>
      </Accordion>
      <Accordion
        expanded={expanded === 'advanced'}
        onChange={handleAccordionChange('advanced')}
        disableGutters
      >
        <AccordionSummary
          expandIcon={<ExpandMoreIcon />}
          className={styles['settings-panel__accordion-summary']}
        >
          <Typography variant="body2" fontWeight={500}>
            {i18n('settings_section_advanced')}
          </Typography>
        </AccordionSummary>
        <AccordionDetails className={styles['settings-panel__accordion-details']}>
          {/* Mirrors the search drawer's single-select filter-input style:
                full-width labeled outlined TextField with italic helper text.
                Using `TextField select` (rather than the horizontal
                ListItem + Select pattern the rest of this panel uses) gives
                long scorer names like `partial_token_similarity_sort_ratio`
                room to render, and keeps the visual consistent with the
                search drawer filters. */}
          {advancedMode && (
            <Box sx={{ p: 1 }}>
              <TextField
                select
                fullWidth
                size="small"
                name="fuzzScorerOverride"
                label={i18n('settings_fuzz_scorer')}
                value={currentSettings.fuzzScorerOverride ?? ''}
                onChange={handleInputChange}
                disabled={isPending}
                helperText={i18n('settings_fuzz_scorer_helper')}
                slotProps={{ formHelperText: { sx: { fontStyle: 'italic' } } }}
              >
                <MenuItem value="">
                  <em>{i18n('settings_fuzz_scorer_default')}</em>
                </MenuItem>
                {FUZZ_SCORER_NAMES.map((name) => (
                  <MenuItem key={name} value={name}>
                    {name}
                  </MenuItem>
                ))}
              </TextField>
            </Box>
          )}
          {advancedMode && (
            <Box sx={{ p: 1 }}>
              <TextField
                select
                fullWidth
                size="small"
                name="remoteLogLevels"
                label={i18n('settings_remote_log_levels')}
                value={selectedRemoteLogLevels}
                onChange={handleRemoteLogLevelsChange}
                disabled={isPending || currentSettings.shareUsageData === false}
                helperText={i18n('settings_remote_log_levels_helper')}
                slotProps={{
                  formHelperText: { sx: { fontStyle: 'italic' } },
                  select: {
                    multiple: true,
                    renderValue: (selected) =>
                      Array.isArray(selected) ? selected.join(', ') : String(selected),
                  },
                }}
              >
                {REMOTE_LOG_LEVELS.map((level) => (
                  <MenuItem key={level} value={level}>
                    <Checkbox size="small" checked={selectedRemoteLogLevels.includes(level)} />
                    <ListItemText primary={level} />
                  </MenuItem>
                ))}
              </TextField>
            </Box>
          )}
          <Box sx={{ p: 1 }}>
            <TextField
              fullWidth
              size="small"
              type="number"
              name="supplierSearchTimeBudgetSec"
              label={i18n('settings_max_search_time')}
              value={currentSettings.supplierSearchTimeBudgetSec ?? ''}
              placeholder={String(search.supplierSearchTimeBudgetSec)}
              onChange={handleInputChange}
              disabled={isPending}
              helperText={i18n('settings_max_search_time_helper', [
                String(search.supplierSearchTimeBudgetSec),
              ])}
              slotProps={{
                formHelperText: { sx: { fontStyle: 'italic' } },
                htmlInput: { min: 0, step: 1 },
              }}
            />
          </Box>
          {advancedMode && (
            <ListItem className={styles['settings-panel__helper-on-hover']}>
              <ListItemText
                primary={i18n('settings_disable_fuzzy')}
                secondary={i18n('settings_disable_fuzzy_desc')}
                slotProps={{ secondary: { sx: { fontStyle: 'italic' } } }}
              />
              <FormControlLabel
                control={
                  <Switch
                    checked={currentSettings.fuzzyFilteringDisabled ?? false}
                    onChange={handleSwitchChange}
                    name="fuzzyFilteringDisabled"
                    disabled={isPending}
                  />
                }
                labelPlacement="start"
                label=""
              />
            </ListItem>
          )}
        </AccordionDetails>
      </Accordion>
      <Accordion
        expanded={expanded === 'actions'}
        onChange={handleAccordionChange('actions')}
        disableGutters
      >
        <AccordionSummary
          expandIcon={<ExpandMoreIcon />}
          className={styles['settings-panel__accordion-summary']}
        >
          <Typography variant="body2" fontWeight={500}>
            {i18n('settings_section_actions')}
          </Typography>
        </AccordionSummary>
        <AccordionDetails className={styles['settings-panel__accordion-details--actions']}>
          <Stack direction="column" spacing={2}>
            <Button
              fullWidth
              variant="outlined"
              color="warning"
              size="small"
              onClick={handleRestoreDefaults}
              disabled={isPending}
            >
              {i18n('settings_restore_defaults')}
            </Button>
            <Button
              fullWidth
              variant="outlined"
              color="error"
              size="small"
              startIcon={<DeleteIcon />}
              onClick={() => setFullResetConfirmOpen(true)}
              disabled={isPending}
            >
              {i18n('settings_full_reset')}
            </Button>
            <Button
              fullWidth
              variant="outlined"
              size="small"
              startIcon={<BugReportIcon />}
              onClick={() => void showReportDialog()}
            >
              {i18n('settings_report_bug')}
            </Button>
          </Stack>
        </AccordionDetails>
      </Accordion>
 
      <Dialog
        open={fullResetConfirmOpen}
        onClose={() => setFullResetConfirmOpen(false)}
        aria-labelledby="full-reset-dialog-title"
        maxWidth="xs"
        fullWidth
      >
        <DialogTitle id="full-reset-dialog-title">
          {i18n('settings_full_reset_confirm_title')}
        </DialogTitle>
        <DialogContent>
          <DialogContentText>{i18n('settings_full_reset_confirm_body')}</DialogContentText>
        </DialogContent>
        <DialogActions>
          <Button onClick={() => setFullResetConfirmOpen(false)}>{i18n('migration_cancel')}</Button>
          <Button color="error" variant="contained" onClick={() => void handleFullReset()}>
            {i18n('settings_full_reset_confirm')}
          </Button>
        </DialogActions>
      </Dialog>
    </Box>
  );
}