import { useCallback, useEffect, useRef, useState } from 'react';

import type {
  CustomWorldWorkSummary,
} from '../../../packages/shared/src/contracts/customWorldAgent';
import type {
  CustomWorldGalleryCard,
  CustomWorldLibraryEntry,
  PlatformBrowseHistoryEntry,
  PlatformBrowseHistoryWriteEntry,
  ProfileDashboardSummary,
  ProfileSaveArchiveSummary,
} from '../../../packages/shared/src/contracts/runtime';
import type { HydratedSavedGameSnapshot } from '../../persistence/runtimeSnapshotTypes';
import type { AuthUser } from '../../services/authService';
import { listRpgCreationWorks } from '../../services/rpg-creation/index';
import {
  listRpgEntryWorldGallery,
  listRpgEntryWorldLibrary,
  listRpgProfileBrowseHistory,
  listRpgProfileSaveArchives,
  resumeRpgProfileSaveArchive,
  upsertRpgProfileBrowseHistory,
} from '../../services/rpg-entry';
import {
  RUNTIME_BACKGROUND_AUTH_OPTIONS,
  type RuntimeRequestOptions,
} from '../../services/rpg-runtime/rpgRuntimeRequest';
import type { CustomWorldProfile } from '../../types';
import type { PlatformHomeTab } from './RpgEntryHomeView';
import { resolveRpgEntryErrorMessage } from './rpgEntryShared';

const PLATFORM_BOOTSTRAP_AUTH_OPTIONS = RUNTIME_BACKGROUND_AUTH_OPTIONS;

type UseRpgEntryBootstrapParams = {
  user: AuthUser | null | undefined;
  canAccessProtectedData?: boolean | undefined;
  getProfileDashboard: (
    options?: RuntimeRequestOptions,
  ) => Promise<ProfileDashboardSummary | null>;
  handleContinueGame: (
    snapshot?: HydratedSavedGameSnapshot | null,
  ) => void;
  hasInitialAgentSession: boolean;
};

export function useRpgEntryBootstrap(
  params: UseRpgEntryBootstrapParams,
) {
  const {
    user,
    canAccessProtectedData = Boolean(user),
    getProfileDashboard,
    handleContinueGame,
    hasInitialAgentSession,
  } = params;
  const isAuthenticated = Boolean(user);
  const canReadProtectedData = Boolean(user) && canAccessProtectedData;
  const platformTabBootstrapUserIdRef = useRef<string | null | undefined>(
    undefined,
  );
  const hasExplicitPlatformTabSelectionRef = useRef(false);

  const [savedCustomWorldEntries, setSavedCustomWorldEntries] = useState<
    CustomWorldLibraryEntry<CustomWorldProfile>[]
  >([]);
  const [customWorldWorkEntries, setCustomWorldWorkEntries] = useState<
    CustomWorldWorkSummary[]
  >([]);
  const [publishedGalleryEntries, setPublishedGalleryEntries] = useState<
    CustomWorldGalleryCard[]
  >([]);
  const [historyEntries, setHistoryEntries] = useState<
    PlatformBrowseHistoryEntry[]
  >([]);
  const [saveEntries, setSaveEntries] = useState<ProfileSaveArchiveSummary[]>([]);
  const [platformTab, setPlatformTabState] =
    useState<PlatformHomeTab>('category');
  const [platformError, setPlatformError] = useState<string | null>(null);
  const [dashboardError, setDashboardError] = useState<string | null>(null);
  const [historyError, setHistoryError] = useState<string | null>(null);
  const [saveError, setSaveError] = useState<string | null>(null);
  const [isLoadingPlatform, setIsLoadingPlatform] = useState(false);
  const [isLoadingDashboard, setIsLoadingDashboard] = useState(false);
  const [isResumingSaveWorldKey, setIsResumingSaveWorldKey] = useState<
    string | null
  >(null);
  const [profileDashboard, setProfileDashboard] =
    useState<ProfileDashboardSummary | null>(null);

  const setPlatformTab = useCallback((nextTab: PlatformHomeTab) => {
    // 区分“平台首屏默认落点”和“用户/流程显式切换”。
    // 一旦显式切过 Tab，就不能再被首屏异步请求回刷成首页或存档。
    hasExplicitPlatformTabSelectionRef.current = true;
    setPlatformTabState(nextTab);
  }, []);

  const refreshProfileDashboard = useCallback(async () => {
    if (!user || !canReadProtectedData) {
      setProfileDashboard(null);
      setDashboardError(null);
      setIsLoadingDashboard(false);
      return;
    }

    setIsLoadingDashboard(true);
    setDashboardError(null);

    try {
      setProfileDashboard(
        await getProfileDashboard(PLATFORM_BOOTSTRAP_AUTH_OPTIONS),
      );
    } catch (error) {
      setDashboardError(
        resolveRpgEntryErrorMessage(error, '读取个人数据看板失败。'),
      );
    } finally {
      setIsLoadingDashboard(false);
    }
  }, [canReadProtectedData, getProfileDashboard, user]);

  const refreshCustomWorldWorks = useCallback(async () => {
    if (!user || !canReadProtectedData) {
      setCustomWorldWorkEntries([]);
      return [];
    }

    const nextItems = await listRpgCreationWorks(
      PLATFORM_BOOTSTRAP_AUTH_OPTIONS,
    );
    setCustomWorldWorkEntries(nextItems);
    return nextItems;
  }, [canReadProtectedData, user]);

  const refreshPublishedGallery = useCallback(async () => {
    const nextEntries = await listRpgEntryWorldGallery();
    setPublishedGalleryEntries(nextEntries);
    return nextEntries;
  }, []);

  const refreshSavedCustomWorldLibrary = useCallback(async () => {
    if (!user || !canReadProtectedData) {
      setSavedCustomWorldEntries([]);
      return [];
    }

    const nextEntries = await listRpgEntryWorldLibrary(
      PLATFORM_BOOTSTRAP_AUTH_OPTIONS,
    );
    setSavedCustomWorldEntries(nextEntries);
    return nextEntries;
  }, [canReadProtectedData, user]);

  const refreshSaveArchives = useCallback(async () => {
    if (!user || !canReadProtectedData) {
      setSaveEntries([]);
      setSaveError(null);
      return [];
    }

    setSaveError(null);

    try {
      const nextEntries = await listRpgProfileSaveArchives(
        PLATFORM_BOOTSTRAP_AUTH_OPTIONS,
      );
      setSaveEntries(nextEntries);
      return nextEntries;
    } catch (error) {
      setSaveError(resolveRpgEntryErrorMessage(error, '读取存档列表失败。'));
      return [];
    }
  }, [canReadProtectedData, user]);

  const appendBrowseHistoryEntry = useCallback(
    async (entry: PlatformBrowseHistoryWriteEntry) => {
      setHistoryError(null);

      try {
        const syncedEntries = await upsertRpgProfileBrowseHistory(
          entry,
          PLATFORM_BOOTSTRAP_AUTH_OPTIONS,
        );
        setHistoryEntries(syncedEntries);
      } catch (error) {
        setHistoryError(
          resolveRpgEntryErrorMessage(error, '写入浏览历史失败。'),
        );
      }
    },
    [],
  );

  const handleResumeSaveEntry = useCallback(
    async (entry: ProfileSaveArchiveSummary) => {
      if (!user || !canReadProtectedData || isResumingSaveWorldKey) {
        return;
      }

      setIsResumingSaveWorldKey(entry.worldKey);
      setSaveError(null);

      try {
        const resumedArchive = await resumeRpgProfileSaveArchive(entry.worldKey);
        setSaveEntries((currentEntries) =>
          currentEntries.map((currentEntry) =>
            currentEntry.worldKey === resumedArchive.entry.worldKey
              ? resumedArchive.entry
              : currentEntry,
          ),
        );
        handleContinueGame(resumedArchive.snapshot);
      } catch (error) {
        setSaveError(resolveRpgEntryErrorMessage(error, '恢复存档失败。'));
      } finally {
        setIsResumingSaveWorldKey(null);
      }
    },
    [canReadProtectedData, handleContinueGame, isResumingSaveWorldKey, user],
  );

  useEffect(() => {
    let isActive = true;
    const nextPlatformBootstrapUserId = user?.id ?? null;
    const shouldApplyInitialPlatformTab =
      platformTabBootstrapUserIdRef.current !== nextPlatformBootstrapUserId;

    if (shouldApplyInitialPlatformTab) {
      // 在请求发出前先占位，避免首屏请求未完成时用户切了 Tab，
      // 返回结果又被误判成“还没初始化过”并强制跳回默认页。
      platformTabBootstrapUserIdRef.current = nextPlatformBootstrapUserId;
    }

    void (async () => {
      setHistoryEntries([]);
      setHistoryError(null);
      setSaveError(null);
      setIsLoadingPlatform(true);
      setPlatformError(null);
      setIsLoadingDashboard(canReadProtectedData);
      setDashboardError(null);
      if (!canReadProtectedData) {
        setSavedCustomWorldEntries([]);
        setCustomWorldWorkEntries([]);
        setSaveEntries([]);
        setProfileDashboard(null);
      }

      try {
        const [
          libraryEntriesResult,
          workEntriesResult,
          galleryEntriesResult,
          dashboardResult,
          historyResult,
          saveArchivesResult,
        ] = await Promise.allSettled([
          canReadProtectedData
            ? listRpgEntryWorldLibrary(PLATFORM_BOOTSTRAP_AUTH_OPTIONS)
            : Promise.resolve([]),
          canReadProtectedData
            ? listRpgCreationWorks(PLATFORM_BOOTSTRAP_AUTH_OPTIONS)
            : Promise.resolve([]),
          listRpgEntryWorldGallery(),
          canReadProtectedData
            ? getProfileDashboard(PLATFORM_BOOTSTRAP_AUTH_OPTIONS)
            : Promise.resolve(null),
          canReadProtectedData
            ? listRpgProfileBrowseHistory(PLATFORM_BOOTSTRAP_AUTH_OPTIONS)
            : Promise.resolve([]),
          canReadProtectedData
            ? listRpgProfileSaveArchives(PLATFORM_BOOTSTRAP_AUTH_OPTIONS)
            : Promise.resolve([]),
        ]);

        if (!isActive) {
          return;
        }

        if (libraryEntriesResult.status === 'fulfilled') {
          setSavedCustomWorldEntries(libraryEntriesResult.value);
        } else {
          setSavedCustomWorldEntries([]);
        }

        if (workEntriesResult.status === 'fulfilled') {
          setCustomWorldWorkEntries(workEntriesResult.value);
        } else {
          setCustomWorldWorkEntries([]);
        }

        if (galleryEntriesResult.status === 'fulfilled') {
          setPublishedGalleryEntries(galleryEntriesResult.value);
        } else {
          // 中文注释：公开广场只影响首页展示，失败时降级为空列表；
          // 私有作品库和创作作品列表的受保护失败才需要阻塞提示。
          setPublishedGalleryEntries([]);
        }

        if (
          (canReadProtectedData &&
            libraryEntriesResult.status === 'rejected') ||
          (canReadProtectedData &&
            workEntriesResult.status === 'rejected')
        ) {
          const platformFailure =
            libraryEntriesResult.status === 'rejected'
              ? libraryEntriesResult.reason
              : workEntriesResult.status === 'rejected'
                ? workEntriesResult.reason
                : null;
          setPlatformError(
            resolveRpgEntryErrorMessage(platformFailure, '读取平台数据失败。'),
          );
        }

        if (dashboardResult.status === 'fulfilled') {
          setProfileDashboard(dashboardResult.value);
        } else if (canReadProtectedData) {
          setProfileDashboard(null);
          setDashboardError(
            resolveRpgEntryErrorMessage(
              dashboardResult.reason,
              '读取个人数据看板失败。',
            ),
          );
        }

        if (historyResult.status === 'fulfilled') {
          setHistoryEntries(historyResult.value);
        } else if (canReadProtectedData) {
          setHistoryError(
            resolveRpgEntryErrorMessage(historyResult.reason, '读取浏览历史失败。'),
          );
        }

        if (saveArchivesResult.status === 'fulfilled') {
          setSaveEntries(saveArchivesResult.value);
        } else if (canReadProtectedData) {
          setSaveEntries([]);
          setSaveError(
            resolveRpgEntryErrorMessage(
              saveArchivesResult.reason,
              '读取存档列表失败。',
            ),
          );
        }

        if (
          shouldApplyInitialPlatformTab &&
          !hasInitialAgentSession &&
          !hasExplicitPlatformTabSelectionRef.current
        ) {
          // 中文注释：新用户先进入发现页；推荐页只在用户主动点击后作为登录门禁入口。
          setPlatformTabState(isAuthenticated ? 'home' : 'category');
        }
      } finally {
        if (isActive) {
          setIsLoadingPlatform(false);
          setIsLoadingDashboard(false);
        }
      }
    })();

    return () => {
      isActive = false;
    };
  }, [
    canReadProtectedData,
    getProfileDashboard,
    hasInitialAgentSession,
    isAuthenticated,
    user,
  ]);

  return {
    isAuthenticated,
    canReadProtectedData,
    platformTab,
    setPlatformTab,
    savedCustomWorldEntries,
    setSavedCustomWorldEntries,
    customWorldWorkEntries,
    setCustomWorldWorkEntries,
    publishedGalleryEntries,
    setPublishedGalleryEntries,
    historyEntries,
    setHistoryEntries,
    saveEntries,
    setSaveEntries,
    platformError,
    setPlatformError,
    dashboardError,
    setDashboardError,
    historyError,
    setHistoryError,
    saveError,
    setSaveError,
    isLoadingPlatform,
    isLoadingDashboard,
    isResumingSaveWorldKey,
    profileDashboard,
    setProfileDashboard,
    refreshProfileDashboard,
    refreshCustomWorldWorks,
    refreshPublishedGallery,
    refreshSavedCustomWorldLibrary,
    refreshSaveArchives,
    appendBrowseHistoryEntry,
    handleResumeSaveEntry,
  };
}

/**
 * 兼容旧创作链命名，避免并行工作包在本轮迁移后断开导入。
 */
export const useRpgCreationPlatformBootstrap = useRpgEntryBootstrap;