/**
 * Staff Email Hooks
 *
 * React Query hooks for the platform staff email client.
 * Provides data fetching, mutations, and caching for the email UI.
 */

import { useQuery, useMutation, useQueryClient, useInfiniteQuery } from '@tanstack/react-query';
import * as staffEmailApi from '../api/staffEmail';
import {
  StaffEmailFolder,
  StaffEmail,
  StaffEmailListItem,
  StaffEmailLabel,
  StaffEmailFilters,
  StaffEmailCreateDraft,
  StaffEmailMove,
  StaffEmailBulkAction,
  StaffEmailReply,
  StaffEmailForward,
  EmailContactSuggestion,
} from '../types';

// Query keys for cache management
export const staffEmailKeys = {
  all: ['staffEmail'] as const,
  folders: () => [...staffEmailKeys.all, 'folders'] as const,
  emails: () => [...staffEmailKeys.all, 'emails'] as const,
  // Use explicit key parts instead of object to ensure proper cache separation
  emailList: (filters: StaffEmailFilters) => [
    ...staffEmailKeys.emails(),
    'list',
    'folder',
    filters.folderId ?? 'none',
    'account',
    filters.emailAddressId ?? 'none',
    'search',
    filters.search ?? '',
  ] as const,
  emailDetail: (id: number) => [...staffEmailKeys.emails(), 'detail', id] as const,
  emailThread: (threadId: string) => [...staffEmailKeys.emails(), 'thread', threadId] as const,
  labels: () => [...staffEmailKeys.all, 'labels'] as const,
  contacts: (query: string) => [...staffEmailKeys.all, 'contacts', query] as const,
  userEmailAddresses: () => [...staffEmailKeys.all, 'userEmailAddresses'] as const,
};

// ============================================================================
// Folder Hooks
// ============================================================================

export const useStaffEmailFolders = () => {
  return useQuery<StaffEmailFolder[]>({
    queryKey: staffEmailKeys.folders(),
    queryFn: staffEmailApi.getFolders,
    staleTime: 30000, // 30 seconds
  });
};

export const useCreateStaffEmailFolder = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (name: string) => staffEmailApi.createFolder(name),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

export const useUpdateStaffEmailFolder = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: ({ id, name }: { id: number; name: string }) => staffEmailApi.updateFolder(id, name),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

export const useDeleteStaffEmailFolder = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.deleteFolder(id),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

// ============================================================================
// Email List Hooks
// ============================================================================

export const useStaffEmails = (filters: StaffEmailFilters = {}, pageSize: number = 50) => {
  const queryKey = staffEmailKeys.emailList(filters);

  // Debug logging
  console.log('[useStaffEmails] Hook called with:', { filters, queryKey, enabled: !!filters.folderId });

  return useInfiniteQuery({
    queryKey,
    queryFn: async ({ pageParam = 1 }) => {
      console.log('[useStaffEmails] queryFn executing with:', { filters, pageParam });
      return staffEmailApi.getEmails(filters, pageParam, pageSize);
    },
    initialPageParam: 1,
    getNextPageParam: (lastPage, allPages) => {
      if (lastPage.next) {
        return allPages.length + 1;
      }
      return undefined;
    },
    staleTime: 10000, // 10 seconds
    // Only fetch when a folder is selected to prevent showing all emails
    enabled: !!filters.folderId,
    // Ensure fresh data when filters change
    refetchOnMount: true,
  });
};

export const useStaffEmailList = (filters: StaffEmailFilters = {}, page: number = 1, pageSize: number = 50) => {
  return useQuery({
    queryKey: [...staffEmailKeys.emailList(filters), page],
    queryFn: () => staffEmailApi.getEmails(filters, page, pageSize),
    staleTime: 10000,
  });
};

// ============================================================================
// Single Email Hooks
// ============================================================================

export const useStaffEmail = (id: number | undefined) => {
  return useQuery<StaffEmail>({
    queryKey: staffEmailKeys.emailDetail(id!),
    queryFn: () => staffEmailApi.getEmail(id!),
    enabled: !!id,
  });
};

export const useStaffEmailThread = (threadId: string | undefined) => {
  return useQuery<StaffEmail[]>({
    queryKey: staffEmailKeys.emailThread(threadId!),
    queryFn: () => staffEmailApi.getEmailThread(threadId!),
    enabled: !!threadId,
  });
};

// ============================================================================
// Draft Hooks
// ============================================================================

export const useCreateDraft = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (data: StaffEmailCreateDraft) => staffEmailApi.createDraft(data),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emails() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

export const useUpdateDraft = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: ({ id, data }: { id: number; data: Partial<StaffEmailCreateDraft> }) =>
      staffEmailApi.updateDraft(id, data),
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emailDetail(variables.id) });
    },
  });
};

export const useDeleteDraft = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.deleteDraft(id),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emails() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

// ============================================================================
// Send/Reply/Forward Hooks
// ============================================================================

export const useSendEmail = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.sendEmail(id),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emails() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

export const useReplyToEmail = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: ({ id, data }: { id: number; data: StaffEmailReply }) =>
      staffEmailApi.replyToEmail(id, data),
    onSuccess: (_, variables) => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emails() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emailDetail(variables.id) });
    },
  });
};

export const useForwardEmail = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: ({ id, data }: { id: number; data: StaffEmailForward }) =>
      staffEmailApi.forwardEmail(id, data),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emails() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

// ============================================================================
// Email Action Hooks
// ============================================================================

export const useMarkAsRead = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.markAsRead(id),
    onSuccess: (_, id) => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emailDetail(id) });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
    // Optimistic update
    onMutate: async (id) => {
      await queryClient.cancelQueries({ queryKey: staffEmailKeys.emailDetail(id) });
      const previousEmail = queryClient.getQueryData<StaffEmail>(staffEmailKeys.emailDetail(id));
      if (previousEmail) {
        queryClient.setQueryData<StaffEmail>(staffEmailKeys.emailDetail(id), {
          ...previousEmail,
          isRead: true,
        });
      }
      return { previousEmail };
    },
    onError: (err, id, context) => {
      if (context?.previousEmail) {
        queryClient.setQueryData(staffEmailKeys.emailDetail(id), context.previousEmail);
      }
    },
  });
};

export const useMarkAsUnread = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.markAsUnread(id),
    onSuccess: (_, id) => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emailDetail(id) });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

export const useStarEmail = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.starEmail(id),
    onSuccess: (_, id) => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emailDetail(id) });
    },
    // Optimistic update
    onMutate: async (id) => {
      await queryClient.cancelQueries({ queryKey: staffEmailKeys.emailDetail(id) });
      const previousEmail = queryClient.getQueryData<StaffEmail>(staffEmailKeys.emailDetail(id));
      if (previousEmail) {
        queryClient.setQueryData<StaffEmail>(staffEmailKeys.emailDetail(id), {
          ...previousEmail,
          isStarred: true,
        });
      }
      return { previousEmail };
    },
    onError: (err, id, context) => {
      if (context?.previousEmail) {
        queryClient.setQueryData(staffEmailKeys.emailDetail(id), context.previousEmail);
      }
    },
  });
};

export const useUnstarEmail = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.unstarEmail(id),
    onSuccess: (_, id) => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emailDetail(id) });
    },
  });
};

export const useArchiveEmail = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.archiveEmail(id),
    onSuccess: () => {
      // Reset and refetch all email list queries
      queryClient.resetQueries({ queryKey: staffEmailKeys.emails() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

export const useTrashEmail = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.trashEmail(id),
    onSuccess: () => {
      // Reset and refetch all email list queries
      queryClient.resetQueries({ queryKey: staffEmailKeys.emails() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

export const useRestoreEmail = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.restoreEmail(id),
    onSuccess: () => {
      queryClient.resetQueries({ queryKey: staffEmailKeys.emails() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

export const usePermanentlyDeleteEmail = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.permanentlyDeleteEmail(id),
    onSuccess: () => {
      queryClient.resetQueries({ queryKey: staffEmailKeys.emails() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

export const useMoveEmails = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (data: StaffEmailMove) => staffEmailApi.moveEmails(data),
    onSuccess: () => {
      queryClient.resetQueries({ queryKey: staffEmailKeys.emails() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

export const useBulkEmailAction = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (data: StaffEmailBulkAction) => staffEmailApi.bulkAction(data),
    onSuccess: () => {
      queryClient.resetQueries({ queryKey: staffEmailKeys.emails() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

// ============================================================================
// Label Hooks
// ============================================================================

export const useStaffEmailLabels = () => {
  return useQuery<StaffEmailLabel[]>({
    queryKey: staffEmailKeys.labels(),
    queryFn: staffEmailApi.getLabels,
    staleTime: 60000, // 1 minute
  });
};

export const useCreateLabel = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: ({ name, color }: { name: string; color: string }) =>
      staffEmailApi.createLabel(name, color),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.labels() });
    },
  });
};

export const useUpdateLabel = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: ({ id, data }: { id: number; data: { name?: string; color?: string } }) =>
      staffEmailApi.updateLabel(id, data),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.labels() });
    },
  });
};

export const useDeleteLabel = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.deleteLabel(id),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.labels() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emails() });
    },
  });
};

export const useAddLabelToEmail = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: ({ emailId, labelId }: { emailId: number; labelId: number }) =>
      staffEmailApi.addLabelToEmail(emailId, labelId),
    onSuccess: (_, { emailId }) => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emailDetail(emailId) });
    },
  });
};

export const useRemoveLabelFromEmail = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: ({ emailId, labelId }: { emailId: number; labelId: number }) =>
      staffEmailApi.removeLabelFromEmail(emailId, labelId),
    onSuccess: (_, { emailId }) => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emailDetail(emailId) });
    },
  });
};

// ============================================================================
// Contact Search Hook
// ============================================================================

export const useContactSearch = (query: string) => {
  return useQuery<EmailContactSuggestion[]>({
    queryKey: staffEmailKeys.contacts(query),
    queryFn: () => staffEmailApi.searchContacts(query),
    enabled: query.length >= 2,
    staleTime: 30000,
  });
};

// ============================================================================
// Attachment Hook
// ============================================================================

export const useUploadAttachment = () => {
  return useMutation({
    mutationFn: ({ file, emailId }: { file: File; emailId?: number }) =>
      staffEmailApi.uploadAttachment(file, emailId),
  });
};

export const useDeleteAttachment = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (id: number) => staffEmailApi.deleteAttachment(id),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emails() });
    },
  });
};

// ============================================================================
// Sync Hook
// ============================================================================

export const useSyncEmails = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: () => staffEmailApi.syncEmails(),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.emails() });
      queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
    },
  });
};

export const useFullSyncEmails = () => {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: () => staffEmailApi.fullSyncEmails(),
    onSuccess: () => {
      // Invalidate after a delay to allow sync to complete
      setTimeout(() => {
        queryClient.invalidateQueries({ queryKey: staffEmailKeys.emails() });
        queryClient.invalidateQueries({ queryKey: staffEmailKeys.folders() });
        queryClient.invalidateQueries({ queryKey: staffEmailKeys.userEmailAddresses() });
      }, 2000);
    },
  });
};

// ============================================================================
// User Email Addresses Hook
// ============================================================================

export const useUserEmailAddresses = () => {
  return useQuery({
    queryKey: staffEmailKeys.userEmailAddresses(),
    queryFn: staffEmailApi.getUserEmailAddresses,
    staleTime: 60000, // 1 minute
  });
};