import { PluginProps } from '@ui-schema/ui-schema/PluginStack/Plugin'
import { PluginSimple } from '@ui-schema/ui-schema/PluginSimpleStack/PluginSimple'
import { Errors } from '@ui-schema/ui-schema/CommonTypings'

export const ERROR_NOT_SET = 'required-not-set'

/**
 *
 * @param type
 * @param value
 *
 * @return boolean false when value does not exist per definition for this type, it still may be empty another way
 */
export function checkValueExists(type: string, value: any): boolean

export interface RequiredValidatorType extends PluginSimple {
    should: ({requiredList, storeKeys}: Partial<PluginProps>) => boolean
    handle: (
        {schema, value, errors, valid}: Partial<PluginProps>
    ) => {
        errors: Errors
        valid: boolean
        required: true
    }
    noHandle: () => { required: false }
}

export const requiredValidator: RequiredValidatorType