import {GetPropParam, IGetPropDescriptor} from '../type';
import {getPropName} from './common';

function normalizeDescriptor(info: GetPropParam): IGetPropDescriptor {
	if (typeof info === 'object') {
		return info;
	} else if (typeof info === 'function') {
		return {
			getValue: info
		};
	} else {
		return {
			name: info
		};
	}
}

function getNameValue(current: any, descriptor: IGetPropDescriptor) {
	const {getValue} = descriptor;
	let name = getPropName(current, descriptor);

	let value;
	if (name !== undefined) {
		value = current[name];
	} else {
		name = 'undefined';

		if (getValue) {
			value = getValue.call(current, current);
		}
	}

	const {got} = descriptor;
	if (got) {
		got.call(current, current, name, value);
	}

	return {name, value};
}

export {
	normalizeDescriptor,
	getNameValue
};