import type { TimedBuildBuff } from './build';
import type { Character } from './characters';
import {
  AnimationState,
  type CombatActionMode,
  type NpcBattleMode,
  type NpcBattleOutcome,
  WorldType,
} from './core';
import type { CustomWorldProfile } from './customWorld';
import type { EquipmentLoadout, InventoryItem } from './items';
import type {
  CombatVisualEffect,
  CompanionState,
  Encounter,
  NpcPersistentState,
  SceneEncounterResult,
  SceneHostileNpc,
  ScenePresetInfo,
} from './scene';
import type { CharacterChatRecord, QuestLogEntry, StoryMoment } from './story';
import type {
  CampaignState,
  ChapterState,
  StoryEngineMemoryState,
} from './storyEngine';

export interface GameRuntimeStats {
  playTimeMs: number;
  lastPlayTickAt: string | null;
  hostileNpcsDefeated: number;
  questsAccepted: number;
  itemsUsed: number;
  scenesTraveled: number;
}

export type PlayerProgressionGrantSource = 'quest' | 'hostile_npc';
export type GameRuntimeMode = 'play' | 'preview' | 'test';

export interface PlayerProgressionState {
  level: number;
  currentLevelXp: number;
  totalXp: number;
  xpToNextLevel: number;
  pendingLevelUps?: number;
  lastGrantedSource?: PlayerProgressionGrantSource | null;
}

export type RuntimeNpcTradeMode = 'buy' | 'sell';

export interface RuntimeNpcTradeItemView {
  itemId: string;
  item: InventoryItem;
  mode: RuntimeNpcTradeMode;
  unitPrice: number;
  maxQuantity: number;
  canSubmit: boolean;
  reason?: string | null;
}

export interface RuntimeNpcGiftItemView {
  itemId: string;
  item: InventoryItem;
  affinityGain: number;
  canSubmit: boolean;
  reason?: string | null;
}

export interface RuntimeNpcInteractionView {
  npcId: string;
  npcName: string;
  playerCurrency: number;
  currencyName: string;
  trade: {
    buyItems: RuntimeNpcTradeItemView[];
    sellItems: RuntimeNpcTradeItemView[];
  };
  gift: {
    items: RuntimeNpcGiftItemView[];
  };
}

export interface GameState {
  worldType: WorldType | null;
  customWorldProfile: CustomWorldProfile | null;
  playerCharacter: Character | null;
  runtimeSessionId?: string | null;
  storySessionId?: string | null;
  runtimeActionVersion?: number;
  runtimeMode?: GameRuntimeMode;
  runtimePersistenceDisabled?: boolean;
  runtimeStats: GameRuntimeStats;
  playerProgression?: PlayerProgressionState | null;
  currentScene: string;
  storyHistory: StoryMoment[];
  storyEngineMemory?: StoryEngineMemoryState;
  chapterState?: ChapterState | null;
  campaignState?: CampaignState | null;
  activeScenarioPackId?: string | null;
  activeCampaignPackId?: string | null;
  characterChats: Record<string, CharacterChatRecord>;
  ambientIdleMode?: 'observe_signs';
  lastObserveSignsSceneId?: string | null;
  lastObserveSignsReport?: string | null;
  animationState: AnimationState;
  currentEncounter: Encounter | null;
  npcInteractionActive: boolean;
  runtimeNpcInteraction?: RuntimeNpcInteractionView | null;
  currentScenePreset: ScenePresetInfo | null;
  sceneHostileNpcs: SceneHostileNpc[];
  playerX: number;
  playerOffsetY: number;
  playerFacing: 'left' | 'right';
  playerActionMode: CombatActionMode;
  scrollWorld: boolean;
  inBattle: boolean;
  playerHp: number;
  playerMaxHp: number;
  playerMana: number;
  playerMaxMana: number;
  playerSkillCooldowns: Record<string, number>;
  activeBuildBuffs?: TimedBuildBuff[];
  activeCombatEffects: CombatVisualEffect[];
  playerCurrency: number;
  playerInventory: InventoryItem[];
  playerEquipment: EquipmentLoadout;
  npcStates: Record<string, NpcPersistentState>;
  quests: QuestLogEntry[];
  roster: CompanionState[];
  companions: CompanionState[];
  currentBattleNpcId: string | null;
  currentNpcBattleMode: NpcBattleMode | null;
  currentNpcBattleOutcome: NpcBattleOutcome | null;
  sparReturnEncounter: Encounter | null;
  sparPlayerHpBefore: number | null;
  sparPlayerMaxHpBefore: number | null;
  sparStoryHistoryBefore: StoryMoment[] | null;
}

export interface AIResponse {
  storyText: string;
  options: StoryMoment['options'];
  encounter?: SceneEncounterResult;
}