import { useCallback, useEffect } from 'react';

import type {
  Character,
  Encounter,
  GameState,
  StoryMoment,
  StoryOption,
} from '../../types';
import type { EscapePlaybackSync as ResolvedChoicePlaybackSync } from '../combat/escapeFlow';
import type { ResolvedChoiceState } from '../combat/resolvedChoice';
import { useTreasureFlow } from '../useTreasureFlow';
import { useStoryInventoryActions } from './inventoryActions';
import { useStoryNpcInteractionFlow } from './npcInteraction';
import type {
  ChoiceRuntimeController,
  ChoiceRuntimeSupport,
  StoryChoiceCoordinatorParams,
} from './storyChoiceCoordinator';
import type { StoryInteractionCoordinatorConfig } from './storyInteractionCoordinator';
import type { StoryRuntimeSupport } from './storyRuntimeSupport';
import { createRpgRuntimeNpcEncounterActions } from './useRpgRuntimeNpcInteraction';
import { useStoryChoiceCoordinator } from './useStoryChoiceCoordinator';

type RpgRuntimeInteractionFlowParams = {
  gameState: GameState;
  isLoading: boolean;
  interactionConfig: StoryInteractionCoordinatorConfig;
  runtimeSupport: StoryRuntimeSupport;
  buildResolvedChoiceState: (
    state: GameState,
    option: StoryOption,
    character: Character,
  ) => ResolvedChoiceState;
  playResolvedChoice: (
    state: GameState,
    option: StoryOption,
    character: Character,
    resolvedChoice: ResolvedChoiceState,
    sync?: ResolvedChoicePlaybackSync,
  ) => Promise<GameState>;
  buildStoryFromResponse: ChoiceRuntimeController['buildStoryFromResponse'];
  getResolvedSceneHostileNpcs: (
    state: GameState,
  ) => GameState['sceneHostileNpcs'];
  getCampCompanionTravelScene: StoryChoiceCoordinatorParams['runtimeController']['getCampCompanionTravelScene'];
  isContinueAdventureOption: (option: StoryOption) => boolean;
  isCampTravelHomeOption: (option: StoryOption) => boolean;
  isRegularNpcEncounter: (
    encounter: GameState['currentEncounter'],
  ) => encounter is Encounter;
  isNpcEncounter: (
    encounter: GameState['currentEncounter'],
  ) => encounter is Encounter;
  npcPreviewTalkFunctionId: string;
  fallbackCompanionName: string;
  turnVisualMs: number;
};

export function createClearStoryInteractionUi(params: {
  clearStoryChoiceUi: () => void;
  clearNpcInteractionUi: () => void;
}) {
  return () => {
    // 中文注释：story 选择面板和 NPC 交互面板是两套独立 UI；
    // 清理运行时交互态时必须同时重置，避免战斗/对话切换后残留旧弹层。
    params.clearStoryChoiceUi();
    params.clearNpcInteractionUi();
  };
}

/**
 * RPG runtime 交互分发层。
 * 统一串起宝箱、背包、NPC 交互与 story choice 的正式分发。
 */
export function useRpgRuntimeInteractionFlow({
  gameState,
  isLoading,
  interactionConfig,
  runtimeSupport,
  buildResolvedChoiceState,
  playResolvedChoice,
  buildStoryFromResponse,
  getResolvedSceneHostileNpcs,
  getCampCompanionTravelScene,
  isContinueAdventureOption,
  isCampTravelHomeOption,
  isRegularNpcEncounter,
  isNpcEncounter,
  npcPreviewTalkFunctionId,
  fallbackCompanionName,
  turnVisualMs,
}: RpgRuntimeInteractionFlowParams) {
  const { handleTreasureInteraction } = useTreasureFlow(
    interactionConfig.treasureFlow,
  );
  const { inventoryUi } = useStoryInventoryActions(
    interactionConfig.inventoryFlow,
  );
  const npcInteractionFlow = useStoryNpcInteractionFlow(
    interactionConfig.npcInteractionFlow,
  );
  const {
    enterNpcInteraction,
    handleNpcInteraction,
    finalizeNpcBattleResult,
    reopenNpcChatAfterBattle,
    handleNpcChatTurn,
    exitNpcChat,
    replacePendingNpcQuestOffer,
    abandonPendingNpcQuestOffer,
    acceptPendingNpcQuestOffer,
  } = createRpgRuntimeNpcEncounterActions({
    ...interactionConfig.npcEncounterActions,
    buildNpcStory: runtimeSupport.buildNpcStory,
    npcInteractionFlow,
  });

  useEffect(() => {
    if (isLoading || gameState.inBattle || gameState.npcInteractionActive) {
      return;
    }

    if (isNpcEncounter(gameState.currentEncounter)) {
      // 中文注释：当场景里已经解析出 NPC 遭遇，且当前不在战斗/加载中时，
      // 自动进入 NPC 交互态，让开场相遇和旅行后遭遇都能无缝落到对话/互动面板。
      enterNpcInteraction(
        gameState.currentEncounter,
        `与${gameState.currentEncounter.npcName}搭话`,
      );
    }
  }, [
    enterNpcInteraction,
    gameState.currentEncounter,
    gameState.inBattle,
    gameState.npcInteractionActive,
    isLoading,
    isNpcEncounter,
  ]);

  const choiceRuntimeController: Parameters<
    typeof useStoryChoiceCoordinator
  >[0]['runtimeController'] = {
    currentStory: interactionConfig.npcEncounterActions.currentStory,
    buildStoryContextFromState:
      interactionConfig.npcEncounterActions.buildStoryContextFromState,
    buildStoryFromResponse: (
      state: GameState,
      character: Character,
      response: StoryMoment,
      availableOptions: StoryOption[] | null,
      optionCatalog?: StoryOption[] | null,
    ) =>
      buildStoryFromResponse(
        state,
        character,
        response,
        availableOptions,
        optionCatalog,
      ),
    buildFallbackStoryForState:
      interactionConfig.npcEncounterActions.buildFallbackStoryForState,
    generateStoryForState: async (params) =>
      interactionConfig.npcEncounterActions.generateStoryForState(params),
    getAvailableOptionsForState:
      interactionConfig.npcEncounterActions.getAvailableOptionsForState,
    getCampCompanionTravelScene: (state, character) =>
      getCampCompanionTravelScene(state, character),
    commitGeneratedStateWithEncounterEntry: async (
      entryState,
      resolvedState,
      character,
      actionText,
      resultText,
      lastFunctionId,
    ) => {
      await interactionConfig.npcEncounterActions.commitGeneratedStateWithEncounterEntry(
        entryState,
        resolvedState,
        character,
        actionText,
        resultText,
        lastFunctionId,
      );
    },
  };
  // 中文注释：choice coordinator 只关心“点下某个 story option 后怎么结算”，
  // NPC 战斗结束后要不要回到对话态，则通过 runtimeSupport 在这里桥接进去。
  const choiceRuntimeSupport: ChoiceRuntimeSupport = {
    ...runtimeSupport,
    handleNpcBattleConversationContinuation: ({
      nextState,
      encounter,
      actionText,
      resultText,
      battleMode,
    }) =>
      reopenNpcChatAfterBattle({
        nextState,
        encounter,
        actionText,
        resultText,
        battleMode,
      }),
  };
  const { handleChoice, battleRewardUi, clearStoryChoiceUi } =
    useStoryChoiceCoordinator({
      gameState,
      isLoading,
      setGameState: interactionConfig.npcEncounterActions.setGameState,
      setCurrentStory: interactionConfig.npcEncounterActions.setCurrentStory,
      setAiError: interactionConfig.npcEncounterActions.setAiError,
      setIsLoading: interactionConfig.npcEncounterActions.setIsLoading,
      buildResolvedChoiceState,
      playResolvedChoice,
      getStoryGenerationHostileNpcs:
        interactionConfig.npcEncounterActions.getStoryGenerationHostileNpcs,
      getResolvedSceneHostileNpcs,
      runtimeController: choiceRuntimeController,
      runtimeSupport: choiceRuntimeSupport,
      enterNpcInteraction,
      handleNpcInteraction,
      handleTreasureInteraction,
      finalizeNpcBattleResult,
      sortOptions: interactionConfig.npcEncounterActions.sortOptions,
      buildContinueAdventureOption:
        interactionConfig.npcEncounterActions.buildContinueAdventureOption,
      isContinueAdventureOption,
      isCampTravelHomeOption,
      isRegularNpcEncounter,
      isNpcEncounter,
      npcPreviewTalkFunctionId,
      fallbackCompanionName,
      turnVisualMs,
    });

  const clearStoryInteractionUi = useCallback(
    createClearStoryInteractionUi({
      clearStoryChoiceUi,
      clearNpcInteractionUi: npcInteractionFlow.clearNpcInteractionUi,
    }),
    [clearStoryChoiceUi, npcInteractionFlow.clearNpcInteractionUi],
  );

  return {
    handleChoice,
    battleRewardUi,
    npcUi: npcInteractionFlow.npcUi,
    inventoryUi,
    clearStoryInteractionUi,
    handleNpcChatInput: (input: string) => {
      const encounter = interactionConfig.npcEncounterActions.gameState.currentEncounter;
      if (!encounter || encounter.kind !== 'npc') {
        return false;
      }

      // 中文注释：聊天提交是 fire-and-forget，
      // 调用方只需要知道“当前能不能发给 NPC”，不需要阻塞等待整轮对话结束。
      void handleNpcChatTurn(encounter, input);
      return true;
    },
    refreshNpcChatOptions: () => {
      const story = interactionConfig.npcEncounterActions.currentStory;
      const encounter = interactionConfig.npcEncounterActions.gameState.currentEncounter;
      if (!story?.npcChatState || !story.options.length || !encounter || encounter.kind !== 'npc') {
        return false;
      }

      const [firstOption, ...restOptions] = story.options;
      if (!firstOption || restOptions.length === 0) {
        return false;
      }

      // 中文注释：NPC 聊天的“换一组回应建议”当前通过轮转 options 实现，
      // 不额外发请求，优先复用本轮已经拿到的候选动作。
      interactionConfig.npcEncounterActions.setCurrentStory({
        ...story,
        options: [...restOptions, firstOption],
      });
      return true;
    },
    exitNpcChat,
    npcChatQuestOfferUi: {
      replacePendingOffer: replacePendingNpcQuestOffer,
      abandonPendingOffer: abandonPendingNpcQuestOffer,
      acceptPendingOffer: acceptPendingNpcQuestOffer,
    },
  };
}

export type UseRpgRuntimeInteractionFlowParams = Parameters<
  typeof useRpgRuntimeInteractionFlow
>[0];
export type RpgRuntimeInteractionFlowResult = ReturnType<
  typeof useRpgRuntimeInteractionFlow
>;

export const createRpgRuntimeInteractionUiResetter =
  createClearStoryInteractionUi;