import { useCallback } from 'react';

import type { RpgCreationResultView } from '../../../packages/shared/src/contracts/rpgCreationResultView';
import type { CustomWorldRuntimeLaunchOptions } from '../platform-entry/platformEntryTypes';
import { rpgCreationPreviewAdapter } from '../../services/rpg-creation/rpgCreationPreviewAdapter';
import type { CustomWorldProfile } from '../../types';

type UseRpgCreationEnterWorldParams = {
  isAgentDraftResultView: boolean;
  activeAgentSessionId: string | null;
  generatedCustomWorldProfile: CustomWorldProfile | null;
  handleCustomWorldSelect: (
    customWorldProfile: CustomWorldProfile,
    options?: CustomWorldRuntimeLaunchOptions,
  ) => void;
  syncAgentDraftResultProfile: (
    profile: CustomWorldProfile,
  ) => Promise<{ profile: CustomWorldProfile | null; view?: RpgCreationResultView | null }>;
  executePublishWorld: () => Promise<unknown>;
  syncAgentCreationResultView: (
    sessionId: string,
  ) => Promise<RpgCreationResultView | null>;
  setGeneratedCustomWorldProfile: (profile: CustomWorldProfile | null) => void;
};

/**
 * 统一“进入世界”前的最终同步策略。
 * Agent 草稿结果进入游戏时只读当前结果页 profile，不再静默回退到会话侧旧快照。
 */
export function useRpgCreationEnterWorld(
  params: UseRpgCreationEnterWorldParams,
) {
  const {
    isAgentDraftResultView,
    activeAgentSessionId,
    generatedCustomWorldProfile,
    handleCustomWorldSelect,
    syncAgentDraftResultProfile,
    executePublishWorld,
    syncAgentCreationResultView,
    setGeneratedCustomWorldProfile,
  } = params;

  const enterWorldForTestFromCurrentResult = useCallback(async () => {
    if (!generatedCustomWorldProfile) {
      return;
    }

    // 中文注释：作品测试必须复用“结果页当前真相源”。
    // 用户在结果页看到并可能继续编辑的是 generatedCustomWorldProfile；
    // 如果这里又回退成 session 里的旧 preview，就会出现
    // “结果页看起来已经是新版，但作品测试实际进入的是旧版快照”的错位。
    if (isAgentDraftResultView && activeAgentSessionId) {
      setGeneratedCustomWorldProfile(generatedCustomWorldProfile);
    }
    handleCustomWorldSelect(generatedCustomWorldProfile, {
      // 中文注释：作品测试现在复用正式 play 运行链，只保留
      // “返回结果页 + 禁止写正式持久化”的入口语义。
      mode: 'play',
      disablePersistence: true,
      returnStage: 'custom-world-result',
    });
  }, [
    activeAgentSessionId,
    generatedCustomWorldProfile,
    handleCustomWorldSelect,
    isAgentDraftResultView,
    setGeneratedCustomWorldProfile,
  ]);

  const publishCurrentResult = useCallback(async () => {
    if (!generatedCustomWorldProfile) {
      return null;
    }

    if (!isAgentDraftResultView || !activeAgentSessionId) {
      return generatedCustomWorldProfile;
    }

    const syncedResult = await syncAgentDraftResultProfile(
      generatedCustomWorldProfile,
    );
    const latestProfile =
      syncedResult.profile ??
      rpgCreationPreviewAdapter.buildPreviewFromResultView(syncedResult.view);

    if (!latestProfile) {
      return null;
    }

    setGeneratedCustomWorldProfile(latestProfile);

    const canEnterPublishedWorld =
      syncedResult.view?.session.stage === 'published' &&
      syncedResult.view.canEnterWorld;

    if (canEnterPublishedWorld) {
      const latestView = await syncAgentCreationResultView(activeAgentSessionId);
      return (
        rpgCreationPreviewAdapter.buildPreviewFromResultView(latestView) ??
        latestProfile
      );
    }

    await executePublishWorld();
    const latestView = await syncAgentCreationResultView(activeAgentSessionId);
    const publishedProfile =
      rpgCreationPreviewAdapter.buildPreviewFromResultView(latestView) ??
      latestProfile;

    setGeneratedCustomWorldProfile(publishedProfile);
    return publishedProfile;
  }, [
    activeAgentSessionId,
    executePublishWorld,
    generatedCustomWorldProfile,
    isAgentDraftResultView,
    setGeneratedCustomWorldProfile,
    syncAgentDraftResultProfile,
    syncAgentCreationResultView,
  ]);

  const enterWorldFromCurrentResult = useCallback(async () => {
    const publishedProfile = await publishCurrentResult();
    if (publishedProfile) {
      handleCustomWorldSelect(publishedProfile);
    }
  }, [handleCustomWorldSelect, publishCurrentResult]);

  return {
    enterWorldFromCurrentResult,
    enterWorldForTestFromCurrentResult,
    publishCurrentResult,
  };
}