// SOLARGOD configuration — every scale constant, camera default, rate preset and
// tunable in one place. Feed paths are RELATIVE so the app works at "/" (dev) and
// under a subpath (prod). Never introduce a leading-slash path.

export const CONFIG = {
  proxy: {
    horizons: 'proxy/horizons',
    sbdb: 'proxy/sbdb',
    sbdbLookup: 'proxy/sbdb_lookup',
    cad: 'proxy/cad',
  },

  // Clock validity = Table 1 range. Scrubbing clamps here (brief §2). Deep-time
  // (EPOCH toggle, &e=1) swaps min/maxMs to the deep bounds below — main.js does
  // the swap at boot, before the clock inits. JS Date handles astronomical years.
  time: {
    minMs: Date.UTC(1800, 0, 1),
    maxMs: Date.UTC(2050, 0, 1),
    deepMinMs: Date.UTC(-2999, 0, 1),  // 3000 BC (Table 2a extended range)
    deepMaxMs: Date.UTC(2999, 11, 31), // 3000 AD
    liveThresholdSec: 60, // |sim − wall| ≤ 60 s at 1× → LIVE
  },

  // The view transform (scale.js). r_view = K · r_AU^P, with P animating between
  // P_mega (0.4) and P_true (1.0). K stays constant so only P moves (brief §4).
  scale: {
    K: 9.0,
    P_mega: 0.4,
    P_true: 1.0,
    transitionMs: 2500,
    // Body draw radius = (r_km / AU_KM) · K · E. Sun gets its own E or it swallows
    // Mercury. HUD slider swaps planetE between presets.
    planetE: 1200,
    sunE: 60,
    ePresets: [1, 100, 1200],
    // Moon local compression around parent (MEGA):
    //   d_view = R_parent_draw · (base + k · log10(1 + d_km / R_parent_km)).
    moonBase: 1.8,
    moonK: 1.2,
  },

  camera: {
    fov: 55,
    near: 0.001,
    far: 1e12,
    focusDistanceFactor: 6, // settle at ~6× target draw radius
    flightMs: 2000,
    startFocus: 'sun',
    minDistance: 0.02,
  },

  // Rate presets in sim-seconds per wall-second (magnitude; sign via reverse btn).
  rates: [
    { label: '1×', value: 1 },
    { label: '1 min/s', value: 60 },
    { label: '1 hr/s', value: 3600 },
    { label: '1 day/s', value: 86400 },
    { label: '1 wk/s', value: 604800 },
    { label: '1 mo/s', value: 2629800 },   // 30.4375 d
    { label: '1 yr/s', value: 31557600 },   // 365.25 d
    { label: '1 decade/s', value: 315576000 },   // 10 · 365.25 d — deep-time travel
    { label: '1 century/s', value: 3155760000 }, // 100 · 365.25 d
  ],
  defaultRateIndex: 3, // 1 day/s

  textures: {
    path: 'assets/textures/',
    skybox: '2k_stars_milky_way.jpg',
  },

  // Orbit paths rebuild only when |ΔT| exceeds this (centuries) or scale changes.
  orbitRebuildCy: 0.1,
  orbitSamples: 512,

  useExtendedRange: false, // default (near mode); main.js flips it on for &e=1 deep time

  colors: {
    accent: '#d9a441',   // brass
    orbit: 0x3a4a63,
    orbitFocus: 0xd9a441,
  },
};