/**
 * Entity History hooks — undo/restore/trash functionality.
 */

import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
import { apiGet, apiPost, apiClient } from './client';

export interface EntityHistoryEntry {
  id: string;
  entity_type: string;
  entity_id: string;
  action: 'create' | 'update' | 'delete';
  snapshot_before: Record<string, unknown> | null;
  snapshot_after: Record<string, unknown> | null;
  changes: Record<string, { old: unknown; new: unknown }> | null;
  user_id: string | null;
  created_at: string;
}

export interface EntityHistoryList {
  items: EntityHistoryEntry[];
  total: number;
}

export interface TrashItem {
  history_id: string;
  entity_type: string;
  entity_id: string;
  snapshot_before: Record<string, unknown> | null;
  deleted_at: string | null;
  user_id: string | null;
}

export interface TrashListResponse {
  items: TrashItem[];
  total: number;
  limit: number;
  offset: number;
}

export interface BulkRestoreResultItem {
  history_id: string;
  success: boolean;
  entity_type: string | null;
  entity_id: string | null;
  error: string | null;
}

export interface BulkRestoreResponse {
  total: number;
  succeeded: number;
  failed: number;
  results: BulkRestoreResultItem[];
  partial_success: boolean;
}

export function useEntityHistory(entityType?: string, entityId?: string, limit = 50) {
  return useQuery({
    queryKey: ['entityHistory', entityType, entityId, limit],
    queryFn: () =>
      apiGet<EntityHistoryList>(`/entity-history/${entityType}/${entityId}?limit=${limit}`),
    enabled: !!entityType && !!entityId,
  });
}

export function useTrashList(entityType?: string, limit = 50, offset = 0) {
  const params = new URLSearchParams();
  params.set('limit', String(limit));
  params.set('offset', String(offset));
  if (entityType) {
    params.set('entity_type', entityType);
  }
  return useQuery({
    queryKey: ['trash', entityType ?? 'all', limit, offset],
    queryFn: () => apiGet<TrashListResponse>(`/entity-history/trash?${params.toString()}`),
  });
}

export function useRestoreFromHistory() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (historyId: string) =>
      apiClient.post('/entity-history/restore', { history_id: historyId }).then(r => r.data),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['entityHistory'] });
      queryClient.invalidateQueries({ queryKey: ['trash'] });
      queryClient.invalidateQueries({ queryKey: ['contacts'] });
      queryClient.invalidateQueries({ queryKey: ['contact'] });
    },
  });
}

export function useBulkRestore() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: (historyIds: string[]) =>
      apiPost<BulkRestoreResponse>('/entity-history/bulk-restore', { history_ids: historyIds }),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['entityHistory'] });
      queryClient.invalidateQueries({ queryKey: ['trash'] });
      queryClient.invalidateQueries({ queryKey: ['contacts'] });
      queryClient.invalidateQueries({ queryKey: ['contact'] });
    },
  });
}

export function useUndoLastAction() {
  const queryClient = useQueryClient();
  return useMutation({
    mutationFn: ({ entityType, entityId }: { entityType: string; entityId: string }) =>
      apiPost(`/entity-history/undo/${entityType}/${entityId}`, {}),
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ['entityHistory'] });
      queryClient.invalidateQueries({ queryKey: ['trash'] });
      queryClient.invalidateQueries({ queryKey: ['contacts'] });
      queryClient.invalidateQueries({ queryKey: ['contact'] });
    },
  });
}