import { logUtils } from '@0xproject/utils';
import * as _ from 'lodash';

import { portalOrderSchema } from 'ts/schemas/portal_order_schema';
import { validator } from 'ts/schemas/validator';
import { Order } from 'ts/types';

export const orderParser = {
    parse(queryString: string): Order | undefined {
        if (queryString.length === 0) {
            return undefined;
        }
        const queryParams = queryString.substring(1).split('&');
        const orderQueryParam = _.find(queryParams, queryParam => {
            const queryPair = queryParam.split('=');
            return queryPair[0] === 'order';
        });
        if (_.isUndefined(orderQueryParam)) {
            return undefined;
        }
        const orderPair = orderQueryParam.split('=');
        if (orderPair.length !== 2) {
            return undefined;
        }
        const order = JSON.parse(decodeURIComponent(orderPair[1]));
        const validationResult = validator.validate(order, portalOrderSchema);
        if (validationResult.errors.length > 0) {
            logUtils.log(`Invalid shared order: ${validationResult.errors}`);
            return undefined;
        }
        return order;
    },
};