import type { ObsolescenceState, Era } from '@token-empire/shared';
import {
  OBSOLESCENCE_BASELINE_GROWTH,
  OBSOLESCENCE_ERA_ACCELERATOR,
  FRESHNESS_DECAY_RATE,
  NEW_MODEL_BOOST_TICKS,
} from '@token-empire/shared';

export function updateObsolescence(
  obs: ObsolescenceState,
  era: Era,
  currentTick: number,
): ObsolescenceState {
  const accelerator = OBSOLESCENCE_ERA_ACCELERATOR[era];
  const newBaseline = obs.marketQualityBaseline + OBSOLESCENCE_BASELINE_GROWTH * accelerator;

  const ticksSinceRelease = currentTick - obs.lastModelReleaseTick;
  const freshness = obs.lastModelReleaseTick > 0
    ? Math.max(0, 1 - ticksSinceRelease * FRESHNESS_DECAY_RATE)
    : 0;

  const boostRemaining = Math.max(0, obs.newModelBoostRemaining - 1);

  return {
    ...obs,
    marketQualityBaseline: newBaseline,
    playerModelFreshness: freshness,
    newModelBoostRemaining: boostRemaining,
  };
}

export function onModelDeployed(obs: ObsolescenceState, tick: number): ObsolescenceState {
  return {
    ...obs,
    playerModelFreshness: 1.0,
    lastModelReleaseTick: tick,
    newModelBoostRemaining: NEW_MODEL_BOOST_TICKS,
  };
}