import { useCallback } from 'react';
import useSWR from 'swr';
import useSWRMutation from 'swr/mutation';

import { apiv3Get, apiv3Put } from '../util/apiv3-client';

export interface ContentDispositionSettings {
  inlineMimeTypes: string[];
  attachmentMimeTypes: string[];
}

interface ContentDispositionGetResponse {
  currentDispositionSettings: ContentDispositionSettings;
}

interface ContentDispositionUpdateRequest {
  newInlineMimeTypes: string[];
  newAttachmentMimeTypes: string[];
}

interface ContentDispositionUpdateResponse {
  currentDispositionSettings: ContentDispositionSettings;
}

interface UseContentDisposition {
  currentSettings: ContentDispositionSettings | undefined;
  isLoading: boolean;
  isUpdating: boolean;
  updateSettings: (
    newSettings: ContentDispositionSettings,
  ) => Promise<ContentDispositionSettings>;
}

export const useContentDisposition = (): UseContentDisposition => {
  const { data, isLoading, mutate } = useSWR(
    '/content-disposition-settings/',
    (endpoint) =>
      apiv3Get<ContentDispositionGetResponse>(endpoint).then(
        (res) => res.data.currentDispositionSettings,
      ),
  );

  const { trigger, isMutating: isUpdating } = useSWRMutation(
    '/content-disposition-settings/',
    async (
      endpoint: string,
      { arg }: { arg: ContentDispositionUpdateRequest },
    ) => {
      const response = await apiv3Put<ContentDispositionUpdateResponse>(
        endpoint,
        arg,
      );
      return response.data.currentDispositionSettings;
    },
  );

  const updateSettings = useCallback(
    async (
      newSettings: ContentDispositionSettings,
    ): Promise<ContentDispositionSettings> => {
      const request: ContentDispositionUpdateRequest = {
        newInlineMimeTypes: newSettings.inlineMimeTypes,
        newAttachmentMimeTypes: newSettings.attachmentMimeTypes,
      };

      const updatedData = await trigger(request);

      // Update local cache and avoid an unnecessary extra GET request
      await mutate(updatedData, { revalidate: false });

      return updatedData;
    },
    [trigger, mutate],
  );

  return {
    currentSettings: data,
    isLoading,
    isUpdating,
    updateSettings,
  };
};