import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
import { projectsApi } from '@/lib/api/projects';
import type { Project, CreateProjectDto, UpdateProjectDto } from '@/types/project';

export function useProjects(page = 1, pageSize = 20) {
  return useQuery<Project[]>({
    queryKey: ['projects', page, pageSize],
    queryFn: async () => {
      console.log('[useProjects] Fetching projects...', { page, pageSize });
      try {
        const result = await projectsApi.getAll(page, pageSize);
        console.log('[useProjects] Fetch successful:', result);
        return result;
      } catch (error) {
        console.error('[useProjects] Fetch failed:', error);
        throw error;
      }
    },
    staleTime: 5 * 60 * 1000, // 5 minutes
    retry: 1, // Only retry once to fail faster
  });
}

export function useProject(id: string) {
  return useQuery<Project>({
    queryKey: ['projects', id],
    queryFn: () => projectsApi.getById(id),
    enabled: !!id,
  });
}

export function useCreateProject() {
  const queryClient = useQueryClient();

  return useMutation({
    mutationFn: (data: CreateProjectDto) => projectsApi.create(data),
    onSuccess: (newProject) => {
      // Invalidate and refetch projects list
      queryClient.invalidateQueries({ queryKey: ['projects'] });

      // Optimistically update cache
      queryClient.setQueryData<Project[]>(['projects'], (old) =>
        old ? [...old, newProject] : [newProject]
      );
    },
  });
}

export function useUpdateProject(id: string) {
  const queryClient = useQueryClient();

  return useMutation({
    mutationFn: (data: UpdateProjectDto) => projectsApi.update(id, data),
    onMutate: async (updatedData) => {
      // Optimistic update
      await queryClient.cancelQueries({ queryKey: ['projects', id] });

      const previousProject = queryClient.getQueryData<Project>(['projects', id]);

      queryClient.setQueryData<Project>(['projects', id], (old) => ({
        ...old!,
        ...updatedData,
      }));

      return { previousProject };
    },
    onError: (err, variables, context) => {
      // Rollback on error
      if (context?.previousProject) {
        queryClient.setQueryData(['projects', id], context.previousProject);
      }
    },
    onSettled: () => {
      queryClient.invalidateQueries({ queryKey: ['projects', id] });
      queryClient.invalidateQueries({ queryKey: ['projects'] });
    },
  });
}

export function useDeleteProject() {
  const queryClient = useQueryClient();

  return useMutation({
    mutationFn: (id: string) => projectsApi.delete(id),
    onSuccess: (_, id) => {
      queryClient.invalidateQueries({ queryKey: ['projects'] });
      queryClient.removeQueries({ queryKey: ['projects', id] });
    },
  });
}