import { useEffect, useMemo } from 'react';
import {
    useQuery,
    UseQueryOptions,
    UseQueryResult,
    useQueryClient,
} from '@tanstack/react-query';

import {
    RaRecord,
    GetManyReferenceParams,
    GetManyReferenceResult,
} from '../types';
import { useDataProvider } from './useDataProvider';
import { useEvent } from '../util';

/**
 * Call the dataProvider.getManyReference() method and return the resolved result
 * as well as the loading state.
 *
 * The return value updates according to the request state:
 *
 * - start: { isPending: true, refetch }
 * - success: { data: [data from store], total: [total from response], isPending: false, refetch }
 * - error: { error: [error from response], isPending: false, refetch }
 *
 * This hook will return the cached result when called a second time
 * with the same parameters, until the response arrives.
 *
 * @param {string} resource The resource name, e.g. 'posts'
 * @param {Params} params The getManyReference parameters { target, id, pagination, sort, filter, meta }
 * @param {Object} options Options object to pass to the queryClient.
 * May include side effects to be executed upon success or failure, e.g. { onSuccess: () => { refresh(); } }
 *
 * @typedef Params
 * @prop params.target The target resource key, e.g. 'post_id'
 * @prop params.id The identifier of the record to look for in target, e.g. '123'
 * @prop params.pagination The request pagination { page, perPage }, e.g. { page: 1, perPage: 10 }
 * @prop params.sort The request sort { field, order }, e.g. { field: 'id', order: 'DESC' }
 * @prop params.filter The request filters, e.g. { title: 'hello, world' }
 * @prop params.meta Optional meta parameters
 *
 * @returns The current request state. Destructure as { data, total, error, isPending, refetch }.
 *
 * @example
 *
 * import { useGetManyReference, useRecordContext } from 'react-admin';
 *
 * const PostComments = () => {
 *     const record = useRecordContext();
 *     // fetch all comments related to the current record
 *     const { data, isPending, error } = useGetManyReference(
 *         'comments',
 *         { target: 'post_id', id: record.id, pagination: { page: 1, perPage: 10 }, sort: { field: 'published_at', order: 'DESC' } }
 *     );
 *     if (isPending) { return <Loading />; }
 *     if (error) { return <p>ERROR</p>; }
 *     return <ul>{data.map(comment =>
 *         <li key={comment.id}>{comment.body}</li>
 *     )}</ul>;
 * };
 */
export const useGetManyReference = <
    RecordType extends RaRecord = any,
    ErrorType = Error,
>(
    resource: string,
    params: Partial<GetManyReferenceParams> = {},
    options: UseGetManyReferenceHookOptions<RecordType, ErrorType> = {}
): UseGetManyReferenceHookValue<RecordType, ErrorType> => {
    const {
        target,
        id,
        pagination = { page: 1, perPage: 25 },
        sort = { field: 'id', order: 'DESC' },
        filter = {},
        meta,
    } = params;
    const dataProvider = useDataProvider();
    const queryClient = useQueryClient();
    const {
        onError = noop,
        onSuccess = noop,
        onSettled = noop,
        ...queryOptions
    } = options;
    const onSuccessEvent = useEvent(onSuccess);
    const onErrorEvent = useEvent(onError);
    const onSettledEvent = useEvent(onSettled);

    const result = useQuery<GetManyReferenceResult<RecordType>, ErrorType>({
        queryKey: [
            resource,
            'getManyReference',
            { target, id, pagination, sort, filter, meta },
        ],
        queryFn: queryParams => {
            if (!target || id == null) {
                // check at runtime to support partial parameters with the enabled option
                return Promise.reject(new Error('target and id are required'));
            }

            return dataProvider
                .getManyReference<RecordType>(resource, {
                    target,
                    id,
                    pagination,
                    sort,
                    filter,
                    meta,
                    signal:
                        dataProvider.supportAbortSignal === true
                            ? queryParams.signal
                            : undefined,
                })
                .then(({ data, total, pageInfo, meta }) => ({
                    data,
                    total,
                    pageInfo,
                    meta,
                }));
        },
        ...queryOptions,
    });

    useEffect(() => {
        if (result.data === undefined) return;
        // optimistically populate the getOne cache
        result.data?.data?.forEach(record => {
            queryClient.setQueryData(
                [resource, 'getOne', { id: String(record.id), meta }],
                oldRecord => oldRecord ?? record
            );
        });

        onSuccessEvent(result.data);
    }, [queryClient, meta, onSuccessEvent, resource, result.data]);

    useEffect(() => {
        if (result.error == null) return;
        onErrorEvent(result.error);
    }, [onErrorEvent, result.error]);

    useEffect(() => {
        if (result.status === 'pending') return;
        onSettledEvent(result.data, result.error);
    }, [onSettledEvent, result.data, result.error, result.status]);

    return useMemo(
        () =>
            result.data
                ? {
                      ...result,
                      ...result.data,
                  }
                : result,
        [result]
    ) as unknown as UseQueryResult<RecordType[], ErrorType> & {
        total?: number;
        pageInfo?: {
            hasNextPage?: boolean;
            hasPreviousPage?: boolean;
        };
        meta?: any;
    };
};

export type UseGetManyReferenceHookOptions<
    RecordType extends RaRecord = any,
    ErrorType = Error,
> = Omit<
    UseQueryOptions<GetManyReferenceResult<RecordType>, ErrorType>,
    'queryKey' | 'queryFn'
> & {
    onSuccess?: (data: GetManyReferenceResult<RecordType>) => void;
    onError?: (error: ErrorType) => void;
    onSettled?: (
        data?: GetManyReferenceResult<RecordType>,
        error?: ErrorType | null
    ) => void;
};

export type UseGetManyReferenceHookValue<
    RecordType extends RaRecord = any,
    ErrorType = Error,
> = UseQueryResult<RecordType[], ErrorType> & {
    total?: number;
    pageInfo?: {
        hasNextPage?: boolean;
        hasPreviousPage?: boolean;
    };
    meta?: any;
};

const noop = () => undefined;