/*
 * Wallpaper background config.
 *
 * Properties:
 * theme         - Active palette theme. One of the keys in window.THEMES
 *                 (default 'ash'). The matching CSS file is loaded at
 *                 startup.
 * language      - UI / i18n language code (default 'en').
 * timeFormat    - Moment.js-compatible format string for the clock.
 * debug         - If 1, the right-side debug panel is shown.
 * units         - Object with 'temperature' ('C' or 'F').
 * location      - Geographic coordinates for sun/moon calculations. Used
 *                 by SunCalc (https://github.com/mourner/suncalc). Object
 *                 with 'lat' (latitude, -90 to +90) and 'lon' (longitude,
 *                 -180 to +180). Positive lat = north, positive lon = east.
 *                 Optionally add 'label' (string) to override the
 *                 reverse-geocoded city name.
 *                 Note: the height grid is axis-aligned (N up); terrain
 *                 matches the 8-mode square mosaic and straight flights
 *                 with fetch=N. Heights: Copernicus DEM via terrarium
 *                 tiles (z9, ~200 m), fetched once per session.
 * terrain         - 3D ground from real elevation data. Object:
 *                   enabled      - true (default) / false = flat plane.
 *                   exaggeration - vertical scale factor on the DEM
 *                                  (default 8; 1 would be physically
 *                                  true and nearly invisible at this
 *                                  horizontal scale).
 * weatherSim    - If true, ignore open-meteo and cycle through
 *                 ['sunny','cloudy','stormy','night'] automatically every
 *                 weatherSimInterval ms. Useful for A/B testing every
 *                 theme without waiting on the API.
 * weatherSimInterval - Sim cycle period in ms (default 30000).
 * orbit         - Figure-eight flight (Bernoulli lemniscate) around
 *                 CONFIG.location instead of a straight drift. The
 *                 eight's self-crossing sits exactly on the configured
 *                 coordinate. Each time the aircraft crosses that point
 *                 a new random orientation is picked and blended in
 *                 over one lobe (spline through the crossing). Object:
 *                   radiusKm  - lobe tip reach from the centre in km
 *                               (~13 km per tile at z11/48deg N).
 *                               Clamped (~190 km) so tips + fog horizon
 *                               fit inside the 43x43 tile mosaic.
 *                   clockwise - travel direction along the eight.
 *                   reorient  - random re-aim at every crossing
 *                               (default true; false keeps the bearing).
 *                 Set to null (or remove) for the straight-line flight.
 * fog           - Ground fog / distance haze. Object with 'distanceKm'
 *                 (visibility range at which terrain fully blends into
 *                 a milky haze; default 120). false/0 disables fog.
 * clouds        - Vertical extent of the cloud deck in world units
 *                 (1 unit = ~13 km at zoom 11; camera flies at y=2.2).
 *                 Object with 'top' and 'bottom'. Default keeps the
 *                 deck a bit below flight altitude.
 * tiles         - All downloads (street tiles, elevation grid, last
 *                 weather payload, geo label) live permanently in
 *                 IndexedDB and are never re-fetched once cached; a
 *                 warm cache = fully offline rendering. Set
 *                 expireDays (number > 0) to re-fetch street tiles
 *                 periodically (e.g. 90).
 *
 * Time format tokens (subset):
 *   YYYY   4-digit year              (2026)
 *   YY     2-digit year              (26)
 *   MMMM   full month name           (October)
 *   MM     month with leading zero   (10)
 *   DD     day with leading zero     (07)
 *   HH     24-hour hour with zero    (18)
 *   hh     12-hour hour with zero    (06)
 *   mm     minute with leading zero  (14)
 *   ss     second with leading zero  (25)
 *   a      am/pm lowercase           (pm) - long form
 *   A      AM/PM uppercase           (PM) - long form
 */
window.CONFIG = {
    theme: 'ash',
    language: 'en',
    timeFormat: 'DD. MMMM, YYYY ‒ HH:mm:SS',
    debug: 0,
    units: {
        temperature: 'C'
    },
    // Data attribution at the bottom of the info box (auto text based on
    // the enabled layers). false = ausgeblendet.
    credits: true,
    // Internal 3D resolution scale (0.3..1, default 1). Lower values
    // render the clouds/map shader at reduced resolution and upscale
    // via CSS - use it if fps is low (GPU-bound) despite a quiet CPU.
    renderScale: 1,
    location: {
        // Latitude and longitude for sun/moon calculations
        // Passau (vorher: Muenchen 48.1374/11.5755, Innsbruck 47.2692/11.4041)
        lat: 48.5667,
        lon: 13.4319
    },
    weatherSim: false,
    weatherSimInterval: 30000,
    // Alles Downloads (Strassenkacheln, Hoehengitter, Wetter-JSON,
    // Geo-Label) bleibt dauerhaft im IndexedDB — kein erneuter
    // Download. expireDays (Tage, >0) reaktiviert periodisches
    // Auffrischen der Strassenkacheln.
    tiles: {
        expireDays: null,
        // true = Kachel-Raender + N/S + x/y-Koords in die Boden-Textur
        // malen (Debug-Orientierung). Aus = saubere Karte.
        debug: false
    },
    // Boden-Bildquelle: 'satellite' = ESRI World_Imagery (Luftbild, ohne
    // Beschriftung), 'streets' = ESRI World_Street_Map (mit Ortsnamen).
    // Beide dauerhaft gecacht (eigener Cache- Praefix pro Stil).
    ground: {
        style: 'satellite'
    },
    // Achterkurs um location (lat/lon), ueberschneidungspunkt genau auf
    // der Koordinate. null/entfernen = gerade Flugbahn.
    orbit: {
        radiusKm: 60,      // Lappenspitze: max. Abstand vom Zentrum
        clockwise: true,
        reorient: true,    // Zufalls-Ausrichtung an jedem Kreuzungs-Durchflug
        // Langsames vertikales Wogen innerhalb der Flugband 15-35 km:
        // Mitte 25 km (~1.93 Welt-Einheiten), amp = halbes Band
        // (10 km ~ 0.77); harte Klemme ueber/unter die Bandgrenzen.
        // periodS Sekunden pro Zyklus, tilt = Reaktion der Kamera-Nase
        // auf Steig-/Sinkrate. enabled: false = konstant 25 km.
        altBob: { enabled: true, amp: 0.77, periodS: 90, tilt: 0.3 }
    },
    // Bodennebel: Distanz-Haze. distanceKm = Sichtweite bis vollständige
    // Nebelsaettigung (false/0 = aus).
    fog: {
        distanceKm: 120
    },
    // 3D-Boden aus echten Hoehendaten (Copernicus DEM, terrarium-Kacheln).
    // enabled: false = flache Ebene. exaggeration: vertikale Ueberhoehung
    // (1 = real, unsichtbar; default 8). wireframe: true = Mesh-Kanten
    // als orange Linien zusaetzlich einblenden (Debug).
    // nightLights: NASA-VIIRS-Stadtlichter-Layer, der ab Sonnenuntergang
    // ueber ~1 h in die Tageskarte geblendet wird (dunkler Boden,
    // leuchtende Staedte). Einmaliger Fetch (~49 Kacheln), persistent
    // gecacht. false = kein Lichtoverlay, nachts bleibt die normale
    // Textur deutlich heller (nur sanft abgedimmt).
    // carLights: fahrende Lichter auf Autobahnen (OSM/Overpass-Kurven,
    // nachts additiv ueber dem Gelaende). JSON einmalig, persistent gecacht.
    // cityLights: Siedlungslichter — OSM-Ortsknoten (city/town/village/
    // hamlet) als leicht gelbliche Glow-Punkte, ab Daemmerung statisch;
    // je groesser die Siedlung (place-Klasse + population-Tag), desto
    // mehr und hellere Punkte. Eine Overpass-Abfrage, persistent gecacht.
    // Daten (c) OpenStreetMap-Mitwirkende, ODbL.
    terrain: {
        enabled: true,
        exaggeration: 10,
        wireframe: false,
        nightLights: false,
        carLights: true,
        cityLights: true
    },
    // Tagessimulation: true = 24h-Zyklus wird in cycleSeconds durchlaufen
    // (Sonne steigt im Osten, Mittag im Sueden, Untergang im Westen).
    // false = echte Sonnen-/Mondposition via SunCalc.
    day: {
        simulation: false,
        cycleSeconds: 20
    },
    // Wolkendecke in Welt-Einheiten (1 unit ~ 13 km bei Zoom 11;
    // Kamera fliegt auf y=2.2). Decke etwas unter Flughohe.
    clouds: {
        top: 0.9,
        bottom: -0.3
    },
};

// List of available themes. The key is the theme id (used in config.theme),
// the value is the CSS file name. Add a new theme by adding a new entry here
// and dropping the corresponding CSS file in the same directory.
window.THEMES = {
    'ash': 'ash.css',
    'gruvbox': 'gruvbox.css',
    'nord': 'nord.css'
};