import starterProfiles from './starterProfiles.json';
import { generatePhenotype } from './phenotype';
import { newId } from './rng';
import type { Alleles, GameState, GrowthStage, SeedProfile, StarterProfile, Stabilities } from './types';

export function nowIso(): string {
  return new Date().toISOString();
}

export function emptyGameState(): GameState {
  return {
    schema: 'weedsim.game_state/v1',
    seeds: [],
    selection: [],
    updatedAt: nowIso(),
  };
}

export function canAttempt(seed: SeedProfile): boolean {
  return seed.attemptsUsed < seed.maxAttempts;
}

export function advanceGrowthStage(stage: GrowthStage): GrowthStage {
  if (stage === 'SEED') return 'SEEDLING';
  if (stage === 'SEEDLING') return 'MATURE';
  return 'MATURE';
}

// Real-time growth: one in-game "day" of growTime = one wall-clock second.
const GROW_MIN_SECONDS = 10;
const GROW_MAX_SECONDS = 300;

function growDurationMs(seed: SeedProfile): number {
  const seconds = Math.min(GROW_MAX_SECONDS, Math.max(GROW_MIN_SECONDS, Math.round(seed.growTime)));
  return seconds * 1000;
}

/** SEED -> SEEDLING with a wall-clock maturation deadline. No-op for other stages. */
export function beginGrowing(seed: SeedProfile, now = Date.now()): SeedProfile {
  if (seed.growthStage !== 'SEED') return seed;
  return { ...seed, growthStage: 'SEEDLING', maturesAt: new Date(now + growDurationMs(seed)).toISOString() };
}

/** Flip seedlings whose timers have elapsed. Legacy seedlings without a deadline mature immediately. */
export function matureReadySeeds(state: GameState, now = Date.now()): GameState {
  let changed = false;
  const seeds = state.seeds.map((seed) => {
    if (seed.growthStage !== 'SEEDLING') return seed;
    const deadline = seed.maturesAt ? Date.parse(seed.maturesAt) : 0;
    if (!deadline || deadline <= now) {
      changed = true;
      return { ...seed, growthStage: 'MATURE' as GrowthStage, maturesAt: null };
    }
    return seed;
  });
  return changed ? { ...state, seeds, updatedAt: nowIso() } : state;
}

export function growSecondsLeft(seed: SeedProfile, now = Date.now()): number {
  if (seed.growthStage !== 'SEEDLING' || !seed.maturesAt) return 0;
  return Math.max(0, Math.ceil((Date.parse(seed.maturesAt) - now) / 1000));
}

export function cloneAlleles(alleles: Alleles): Alleles {
  return {
    THC: [...alleles.THC],
    CBD: [...alleles.CBD],
    Yield: [...alleles.Yield],
    GrowTime: [...alleles.GrowTime],
    LeafColor: {
      Hue: [...alleles.LeafColor.Hue],
      Saturation: [...alleles.LeafColor.Saturation],
      Value: [...alleles.LeafColor.Value],
    },
    BudColor: {
      Hue: [...alleles.BudColor.Hue],
      Saturation: [...alleles.BudColor.Saturation],
      Value: [...alleles.BudColor.Value],
    },
  };
}

export function cloneStabilities(stabilities: Stabilities): Stabilities {
  return { ...stabilities };
}

function roundTrait(value: number): number {
  return Math.round(value * 10) / 10;
}

export function reexpressSeed(seed: SeedProfile): SeedProfile {
  const phenotype = generatePhenotype(seed.alleles, seed.stabilities);
  return {
    ...seed,
    thc: roundTrait(phenotype.thc),
    cbd: roundTrait(phenotype.cbd),
    yield: roundTrait(phenotype.yield),
    growTime: roundTrait(phenotype.growTime),
    budColor: phenotype.budColorRgb,
    leafColor: phenotype.leafColorRgb,
    budPalette: phenotype.budPaletteRgb,
    leafPalette: phenotype.leafPaletteRgb,
    budPattern: phenotype.budPattern,
    leafPattern: phenotype.leafPattern,
  };
}

export function normalizeGameState(state: GameState): GameState {
  const validSelection = new Set(state.seeds.map((seed) => seed.seedId));
  return {
    ...emptyGameState(),
    ...state,
    seeds: state.seeds.map(reexpressSeed),
    selection: state.selection.filter((seedId) => validSelection.has(seedId)),
  };
}

function seedFromStarter(profile: StarterProfile): SeedProfile {
  return reexpressSeed({
    seedId: newId(),
    strainName: profile.name,
    type: profile.type,
    alleles: cloneAlleles(profile.alleles),
    stabilities: cloneStabilities(profile.stabilities),
    thc: profile.traits_base.THC,
    cbd: profile.traits_base.CBD,
    yield: profile.traits_base.Yield,
    growTime: profile.traits_base.GrowTime,
    budColor: [0, 0, 0],
    leafColor: [0, 0, 0],
    budPalette: [],
    leafPalette: [],
    budPattern: 'solid',
    leafPattern: 'solid',
    baseImageName: profile.base_image_name,
    growthStage: 'SEED',
    lineage: [null, null],
    description: profile.description ?? '',
    quantity: 1,
    attemptsUsed: 0,
    maxAttempts: 2,
    isStarter: true,
  });
}

export function createStarterSeeds(): SeedProfile[] {
  return (starterProfiles as StarterProfile[]).map(seedFromStarter);
}

export function withStarters(state: GameState): GameState {
  return normalizeGameState({
    ...state,
    seeds: [...state.seeds, ...createStarterSeeds()],
    updatedAt: nowIso(),
  });
}

export function findSeed(state: GameState, seedId: string): SeedProfile | undefined {
  return state.seeds.find((seed) => seed.seedId === seedId);
}

export function replaceSeeds(state: GameState, seeds: SeedProfile[]): GameState {
  return normalizeGameState({ ...state, seeds, updatedAt: nowIso() });
}