import { useMemo } from 'react';
import defaults from 'lodash/defaults.js';

import { useResourceDefinitions } from './useResourceDefinitions';
import { useResourceContext } from './useResourceContext';
import {
    RecordToStringFunction,
    ResourceDefinition,
    ResourceOptions,
} from '../types';

/**
 * Hook to get the definition of a given resource
 *
 * @example // Get the current resource definition (based on ResourceContext)
 *
 * const definition = useResourceDefinition();
 * console.log(definition);
 * // {
 * //   name: 'posts',
 * //   hasList: true,
 * //   hasEdit: true,
 * //   hasShow: true,
 * //   hasCreate: true,
 * //   options: {},
 * //   icon: PostIcon,
 * // }
 *
 * @example // Pass a resource prop to check a different resource definition
 *
 * const definition = useResourceDefinition({ resource: 'posts' });
 */
export const useResourceDefinition = <
    OptionsType extends ResourceOptions = any,
>(
    props?: UseResourceDefinitionOptions
): ResourceDefinition<OptionsType> => {
    const resource = useResourceContext(props);
    const resourceDefinitions = useResourceDefinitions();
    const { hasCreate, hasEdit, hasList, hasShow, recordRepresentation } =
        props || {};

    const definition = useMemo(() => {
        return defaults(
            {},
            {
                hasCreate,
                hasEdit,
                hasList,
                hasShow,
                recordRepresentation,
            },
            resource ? resourceDefinitions[resource] : {}
        ) as ResourceDefinition<OptionsType>;
    }, [
        resource,
        resourceDefinitions,
        hasCreate,
        hasEdit,
        hasList,
        hasShow,
        recordRepresentation,
    ]);

    return definition;
};

export interface UseResourceDefinitionOptions {
    readonly resource?: string;
    readonly hasList?: boolean;
    readonly hasEdit?: boolean;
    readonly hasShow?: boolean;
    readonly hasCreate?: boolean;
    readonly recordRepresentation?: React.ReactNode | RecordToStringFunction;
}