import {
  ClientError,
  InferClientInput,
  InferClientOutput,
} from "@mercurjs/client";
import {
  UseMutationOptions,
  UseQueryOptions,
  useMutation,
  useQueries,
  useQuery,
} from "@tanstack/react-query";

import { sdk, fetchQuery } from "../../lib/client";
import { queryClient } from "../../lib/query-client";
import { queryKeysFactory } from "../../lib/query-key-factory";
import { variantsQueryKeys } from "./products";

const INVENTORY_ITEMS_QUERY_KEY = "inventory_items" as const;
export const inventoryItemsQueryKeys = queryKeysFactory(
  INVENTORY_ITEMS_QUERY_KEY,
);

const INVENTORY_ITEM_LEVELS_QUERY_KEY = "inventory_item_levels" as const;
export const inventoryItemLevelsQueryKeys = queryKeysFactory(
  INVENTORY_ITEM_LEVELS_QUERY_KEY,
);

export const useInventoryItems = (
  query?: InferClientInput<typeof sdk.vendor.inventoryItems.query>,
  options?: UseQueryOptions<
    unknown,
    ClientError,
    InferClientOutput<typeof sdk.vendor.inventoryItems.query>
  >,
) => {
  const { data, ...rest } = useQuery({
    queryFn: () => sdk.vendor.inventoryItems.query({ ...query }),
    queryKey: inventoryItemsQueryKeys.list(query),
    ...options,
  });

  return { ...data, ...rest };
};

export const useInventoryItem = (
  id: string,
  query?: Omit<
    InferClientInput<typeof sdk.vendor.inventoryItems.$id.query>,
    "$id"
  >,
  options?: UseQueryOptions<
    unknown,
    ClientError,
    InferClientOutput<typeof sdk.vendor.inventoryItems.$id.query>
  >,
) => {
  const { data, ...rest } = useQuery({
    queryFn: () => sdk.vendor.inventoryItems.$id.query({ $id: id, ...query }),
    queryKey: inventoryItemsQueryKeys.detail(id),
    ...options,
  });

  return { ...data, ...rest };
};

export const useCreateInventoryItem = (
  options?: UseMutationOptions<
    InferClientOutput<typeof sdk.vendor.inventoryItems.mutate>,
    ClientError,
    InferClientInput<typeof sdk.vendor.inventoryItems.mutate>
  >,
) => {
  return useMutation({
    mutationFn: (payload) => sdk.vendor.inventoryItems.mutate(payload),
    onSuccess: (data, variables, context) => {
      queryClient.invalidateQueries({
        queryKey: inventoryItemsQueryKeys.lists(),
      });
      options?.onSuccess?.(data, variables, context);
    },
    ...options,
  });
};

export const useUpdateInventoryItem = (
  id: string,
  options?: UseMutationOptions<
    InferClientOutput<typeof sdk.vendor.inventoryItems.$id.mutate>,
    ClientError,
    Omit<InferClientInput<typeof sdk.vendor.inventoryItems.$id.mutate>, "$id">
  >,
) => {
  return useMutation({
    mutationFn: (payload) =>
      sdk.vendor.inventoryItems.$id.mutate({ $id: id, ...payload }),
    onSuccess: (data, variables, context) => {
      queryClient.invalidateQueries({
        queryKey: inventoryItemsQueryKeys.lists(),
      });
      queryClient.invalidateQueries({
        queryKey: inventoryItemsQueryKeys.detail(id),
      });
      options?.onSuccess?.(data, variables, context);
    },
    ...options,
  });
};

export const useDeleteInventoryItem = (
  id: string,
  options?: UseMutationOptions<
    InferClientOutput<typeof sdk.vendor.inventoryItems.$id.delete>,
    ClientError,
    void
  >,
) => {
  return useMutation({
    mutationFn: () => sdk.vendor.inventoryItems.$id.delete({ $id: id }),
    onSuccess: (data, variables, context) => {
      queryClient.invalidateQueries({
        queryKey: inventoryItemsQueryKeys.lists(),
      });
      queryClient.invalidateQueries({
        queryKey: inventoryItemsQueryKeys.detail(id),
      });
      options?.onSuccess?.(data, variables, context);
    },
    ...options,
  });
};

export const useDeleteInventoryItemLevel = (
  inventoryItemId: string,
  locationId: string,
  options?: UseMutationOptions<
    InferClientOutput<
      typeof sdk.vendor.inventoryItems.$id.locationLevels.$locationId.delete
    >,
    ClientError,
    void
  >,
) => {
  return useMutation({
    mutationFn: () =>
      sdk.vendor.inventoryItems.$id.locationLevels.$locationId.delete({
        $id: inventoryItemId,
        $locationId: locationId,
      }),
    onSuccess: (data, variables, context) => {
      queryClient.invalidateQueries({
        queryKey: inventoryItemsQueryKeys.lists(),
      });
      queryClient.invalidateQueries({
        queryKey: inventoryItemsQueryKeys.detail(inventoryItemId),
      });
      queryClient.invalidateQueries({
        queryKey: inventoryItemLevelsQueryKeys.detail(inventoryItemId),
      });
      options?.onSuccess?.(data, variables, context);
    },
    ...options,
  });
};

export const useInventoryItemLevels = (
  inventoryItemId: string,
  query?: Omit<
    InferClientInput<typeof sdk.vendor.inventoryItems.$id.locationLevels.query>,
    "$id"
  >,
  options?: UseQueryOptions<
    unknown,
    ClientError,
    InferClientOutput<typeof sdk.vendor.inventoryItems.$id.locationLevels.query>
  >,
) => {
  const { data, ...rest } = useQuery({
    queryFn: () =>
      sdk.vendor.inventoryItems.$id.locationLevels.query({
        $id: inventoryItemId,
        limit: query?.limit ?? 100,
        offset: query?.offset ?? 0,
        ...query,
      }),
    queryKey: inventoryItemLevelsQueryKeys.list({
      ...(query || {}),
      inventoryItemId,
    }),
    ...options,
    enabled:
      !!inventoryItemId &&
      (options?.enabled !== undefined ? options.enabled : true),
  });

  return { ...data, ...rest };
};

export const useUpdateInventoryLevel = (
  inventoryItemId: string,
  locationId: string,
  options?: UseMutationOptions<
    InferClientOutput<
      typeof sdk.vendor.inventoryItems.$id.locationLevels.$locationId.mutate
    >,
    ClientError,
    Omit<
      InferClientInput<
        typeof sdk.vendor.inventoryItems.$id.locationLevels.$locationId.mutate
      >,
      "$id" | "$locationId"
    >
  >,
) => {
  return useMutation({
    mutationFn: (payload) =>
      sdk.vendor.inventoryItems.$id.locationLevels.$locationId.mutate({
        $id: inventoryItemId,
        $locationId: locationId,
        ...payload,
      }),
    onSuccess: (data, variables, context) => {
      queryClient.invalidateQueries({
        queryKey: inventoryItemsQueryKeys.lists(),
      });
      queryClient.invalidateQueries({
        queryKey: inventoryItemsQueryKeys.detail(inventoryItemId),
      });
      queryClient.invalidateQueries({
        queryKey: inventoryItemLevelsQueryKeys.detail(inventoryItemId),
      });
      queryClient.invalidateQueries({
        queryKey: inventoryItemLevelsQueryKeys.lists(),
      });
      queryClient.invalidateQueries({
        queryKey: variantsQueryKeys.details(),
      });
      options?.onSuccess?.(data, variables, context);
    },
    ...options,
  });
};

export const useBatchInventoryItemLocationLevels = (
  inventoryItemId: string,
  options?: UseMutationOptions<
    InferClientOutput<
      typeof sdk.vendor.inventoryItems.$id.locationLevels.batch.mutate
    >,
    ClientError,
    Omit<
      InferClientInput<
        typeof sdk.vendor.inventoryItems.$id.locationLevels.batch.mutate
      >,
      "$id"
    >
  >,
) => {
  return useMutation({
    mutationFn: (payload) =>
      sdk.vendor.inventoryItems.$id.locationLevels.batch.mutate({
        $id: inventoryItemId,
        ...payload,
      }),
    onSuccess: (data, variables, context) => {
      queryClient.invalidateQueries({
        queryKey: inventoryItemsQueryKeys.lists(),
      });
      queryClient.invalidateQueries({
        queryKey: inventoryItemsQueryKeys.detail(inventoryItemId),
      });
      queryClient.invalidateQueries({
        queryKey: inventoryItemLevelsQueryKeys.detail(inventoryItemId),
      });
      queryClient.invalidateQueries({
        queryKey: inventoryItemLevelsQueryKeys.list({ inventoryItemId }),
      });
      options?.onSuccess?.(data, variables, context);
    },
    ...options,
  });
};

export type InventoryItemLocationLevel = {
  id: string
  location_id: string
  stocked_quantity: number
  reserved_quantity: number
  incoming_quantity: number
  available_quantity: number
}

export type InventoryItemWithLevels = {
  inventory_item_id: string
  location_levels: InventoryItemLocationLevel[]
}

type UseMultipleInventoryItemLevelsReturn = {
  inventoryItemsWithLevels: InventoryItemWithLevels[]
  allLocationLevels: InventoryItemLocationLevel[]
  isPending: boolean
  isRefetching: boolean
  isError: boolean
  error: Error | null | undefined
  refetch: () => Promise<void>
}

export const useMultipleInventoryItemLevels = (
  inventoryItemIds: string[],
  query?: Record<string, any>
): UseMultipleInventoryItemLevelsReturn => {
  const queries = useQueries({
    queries: inventoryItemIds.map((id) => ({
      queryKey: inventoryItemLevelsQueryKeys.detail(id, query),
      queryFn: () =>
        fetchQuery(`/vendor/inventory-items/${id}/location-levels`, {
          method: "GET",
          query: { fields: "*stock_locations", ...query } as {
            [key: string]: string | number
          },
        }),
      enabled: Boolean(id),
    })),
  })

  const isPending = queries.some((q) => q.isPending)
  const isRefetching = queries.some((q) => q.isRefetching)
  const isError = queries.some((q) => q.isError)
  const error = queries.find((q) => q.error)?.error

  const allLocationLevels: InventoryItemLocationLevel[] = queries
    .filter((q) => q.data?.inventory_levels)
    .flatMap((q) => q.data?.inventory_levels || [])

  const inventoryItemsWithLevels: InventoryItemWithLevels[] = queries
    .map((query, index) => {
      if (query.data?.inventory_levels) {
        return {
          inventory_item_id: inventoryItemIds[index],
          location_levels: query.data.inventory_levels as InventoryItemLocationLevel[],
        }
      }
      return null
    })
    .filter((item): item is InventoryItemWithLevels => item !== null)

  const refetch = async () => {
    await Promise.all(queries.map((q) => q.refetch()))
  }

  return {
    inventoryItemsWithLevels,
    allLocationLevels,
    isPending,
    isRefetching,
    isError,
    error,
    refetch,
  }
}

export const useBatchInventoryItemsLocationLevels = (
  options?: UseMutationOptions<
    InferClientOutput<
      typeof sdk.vendor.inventoryItems.locationLevels.batch.mutate
    >,
    ClientError,
    InferClientInput<
      typeof sdk.vendor.inventoryItems.locationLevels.batch.mutate
    >
  >,
) => {
  return useMutation({
    mutationFn: (payload) =>
      sdk.vendor.inventoryItems.locationLevels.batch.mutate(payload),
    onSuccess: (data, variables, context) => {
      queryClient.invalidateQueries({
        queryKey: inventoryItemsQueryKeys.all,
      });
      queryClient.invalidateQueries({
        queryKey: inventoryItemLevelsQueryKeys.all,
      });
      queryClient.invalidateQueries({
        queryKey: variantsQueryKeys.lists(),
      });
      options?.onSuccess?.(data, variables, context);
    },
    ...options,
  });
};