let UserError = require('vn-loopback/util/user-error');
let pick = require('object.pick');

module.exports = Self => {
    Self.remoteMethod('updateBasicData', {
        description: 'Updates basic data of an order',
        accessType: 'WRITE',
        accepts: [
            {
                arg: 'id',
                type: 'string',
                required: true,
                description: 'Model id',
                http: {source: 'path'}
            }, {
                arg: 'data',
                type: 'Object',
                required: true,
                description: 'Params to update',
                http: {source: 'body'}
            }
        ],
        returns: {
            arg: 'order',
            type: 'Object',
            root: true
        },
        http: {
            path: `/:id/updateBasicData`,
            verb: 'PATCH'
        }
    });

    Self.updateBasicData = async(id, params, options) => {
        const models = Self.app.models;
        const myOptions = {};
        let tx;

        if (typeof options == 'object')
            Object.assign(myOptions, options);

        if (!myOptions.transaction) {
            tx = await Self.beginTransaction({});
            myOptions.transaction = tx;
        }

        try {
            const order = await models.Order.findById(id, null, myOptions);
            const orderRows = await models.OrderRow.find({where: {orderFk: id}}, myOptions);

            if (order.isConfirmed || orderRows.length != 0)
                throw new UserError(`You can't make changes on the basic data of an confirmed order or with rows`);

            const updateParams = pick(params, [
                'clientFk',
                'addressFk',
                'landed',
                'agencyModeFk',
                'note',
            ]);
            if (Object.keys(updateParams).length)
                await order.updateAttributes(updateParams, myOptions);

            if (tx) await tx.commit();

            return order;
        } catch (e) {
            if (tx) await tx.rollback();
            throw e;
        }
    };
};