// Single source of truth for "where is the user" across the home hero map,
// /map, and Browse Events' location filter — storage, place search, and
// GPS lookup used to be copy-pasted across all three, which is exactly how
// one of them (a Nominatim result not being saved) silently drifted out of
// sync with the other two. Each page still owns what happens once a
// location resolves (recenter a map vs. navigate to a new URL) — that part
// genuinely differs per page — but the operations themselves live here once.
(function (window) {
  var LAST_LOCATION_KEY = 'vindn:lastLocation';

  function load() {
    try {
      var raw = window.localStorage && localStorage.getItem(LAST_LOCATION_KEY);
      if (!raw) return null;
      var parsed = JSON.parse(raw);
      if (typeof parsed.lat === 'number' && typeof parsed.lon === 'number' && isFinite(parsed.lat) && isFinite(parsed.lon)) {
        return parsed;
      }
    } catch (e) { /* localStorage disabled/unavailable, or corrupt value — just skip it */ }
    return null;
  }

  function save(lat, lon, name) {
    try {
      if (window.localStorage) localStorage.setItem(LAST_LOCATION_KEY, JSON.stringify({ lat: lat, lon: lon, name: name || null }));
    } catch (e) { /* localStorage disabled/unavailable — nothing to persist to */ }
  }

  function clear() {
    try {
      if (window.localStorage) localStorage.removeItem(LAST_LOCATION_KEY);
    } catch (e) { /* localStorage disabled/unavailable */ }
  }

  // Nominatim: explicit submit only, never as-you-type — required by its
  // usage policy (max ~1 req/s, no autocomplete-style querying). Every
  // "search a place" form on the site should call this instead of its own
  // fetch, so they all behave identically (and a fix here fixes all three).
  function searchPlace(query, callbacks) {
    callbacks = callbacks || {};
    if (callbacks.onStart) callbacks.onStart(query);
    fetch('https://nominatim.openstreetmap.org/search?format=json&limit=1&q=' + encodeURIComponent(query))
      .then(function (res) { return res.json(); })
      .then(function (results) {
        if (!results || !results.length) {
          if (callbacks.onNotFound) callbacks.onNotFound(query);
          return;
        }
        if (callbacks.onFound) callbacks.onFound(parseFloat(results[0].lat), parseFloat(results[0].lon), results[0].display_name);
      })
      .catch(function () {
        if (callbacks.onError) callbacks.onError();
      });
  }

  // "Use my location" — shared so every page reports the same fixed label
  // for a GPS-derived point (no reverse geocoding happens) and the same
  // error/unsupported messaging.
  function useMyLocation(callbacks) {
    callbacks = callbacks || {};
    if (!navigator.geolocation) {
      if (callbacks.onUnsupported) callbacks.onUnsupported();
      return;
    }
    if (callbacks.onStart) callbacks.onStart();
    navigator.geolocation.getCurrentPosition(function (pos) {
      if (callbacks.onFound) callbacks.onFound(pos.coords.latitude, pos.coords.longitude, window.VindnI18n.t('location.yours'));
    }, function () {
      if (callbacks.onError) callbacks.onError();
    }, { timeout: 8000 });
  }

  window.VindnLocation = {
    load: load,
    save: save,
    clear: clear,
    searchPlace: searchPlace,
    useMyLocation: useMyLocation
  };
})(window);