module.exports = Self => {
    Self.remoteMethodCtx('transferClient', {
        description: 'Transferring ticket to another client',
        accessType: 'WRITE',
        accepts: [{
            arg: 'id',
            type: 'number',
            required: true,
            description: 'the ticket id',
            http: {source: 'path'}
        }, {
            arg: 'clientFk',
            type: 'number',
            required: true,
        }],
        http: {
            path: `/:id/transferClient`,
            verb: 'PATCH'
        }
    });

    Self.transferClient = async(ctx, id, clientFk, 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 {
            await Self.isEditableOrThrow(ctx, id, myOptions);

            const ticketRefund = await models.TicketRefund.findOne({
                where: {or: [{originalTicketFk: id}, {refundTicketFk: id}]},
                include: [{relation: 'refundTicket'}, {relation: 'originalTicket'}]
            }, myOptions);

            const client = await models.Client.findById(clientFk,
                {fields: ['id', 'defaultAddressFk']}, myOptions);

            const address = await models.Address.findById(client.defaultAddressFk,
                {fields: ['id', 'nickname']}, myOptions);

            const attributes = {clientFk, addressFk: client.defaultAddressFk, nickname: address.nickname};

            const tickets = [];
            const ticketIds = [];

            if (ticketRefund) {
                const {refundTicket, originalTicket} = ticketRefund;
                tickets.push(refundTicket(), originalTicket());

                for (const ticket of tickets) {
                    await ticket.updateAttributes(attributes, myOptions);
                    ticketIds.push(ticket.id);
                }
            } else {
                await Self.updateAll({id}, attributes, myOptions);
                ticketIds.push(id);
            }

            await models.Claim.updateAll({ticketFk: {inq: ticketIds}}, {clientFk}, myOptions);

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