module.exports = Self => {
    Self.remoteMethod('refund', {
        description: 'Create refund tickets with sales and services if provided',
        accessType: 'WRITE',
        accepts: [
            {
                arg: 'salesIds',
                type: ['number'],
                required: true
            },
            {
                arg: 'servicesIds',
                type: ['number']
            },
            {
                arg: 'createSingleTicket',
                type: 'boolean',
                required: false
            }
        ],
        returns: {
            type: ['number'],
            root: true
        },
        http: {
            path: `/refund`,
            verb: 'post'
        }
    });

    Self.refund = async(salesIds, servicesIds, createSingleTicket = false, 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 refundAgencyMode = await models.AgencyMode.findOne({
                include: {
                    relation: 'zones',
                    scope: {
                        limit: 1,
                        field: ['id', 'name']
                    }
                },
                where: {code: 'refund'}
            }, myOptions);

            const refoundZoneId = refundAgencyMode.zones()[0].id;

            const salesFilter = {
                where: {id: {inq: salesIds}},
                include: {
                    relation: 'components',
                    scope: {
                        fields: ['saleFk', 'componentFk', 'value']
                    }
                }
            };
            const sales = await models.Sale.find(salesFilter, myOptions);
            const ticketsIds = [...new Set(sales.map(sale => sale.ticketFk))];

            const refundTickets = [];
            const mappedTickets = new Map();
            const now = Date.vnNew();

            const [firstTicketId] = ticketsIds;
            if (createSingleTicket) {
                await createTicketRefund(
                    firstTicketId,
                    refundTickets,
                    mappedTickets,
                    now,
                    refundAgencyMode,
                    refoundZoneId,
                    myOptions
                );
            } else {
                for (let ticketId of ticketsIds) {
                    await createTicketRefund(
                        ticketId,
                        refundTickets,
                        mappedTickets,
                        now,
                        refundAgencyMode,
                        refoundZoneId,
                        myOptions
                    );
                }
            }

            for (const sale of sales) {
                const refundTicketId = await getTicketRefundId(createSingleTicket, sale.ticketFk, refundTickets, mappedTickets);

                const createdSale = await models.Sale.create({
                    ticketFk: refundTicketId,
                    itemFk: sale.itemFk,
                    quantity: - sale.quantity,
                    concept: sale.concept,
                    price: sale.price,
                    discount: sale.discount,
                }, myOptions);

                const components = sale.components();
                for (const component of components)
                    component.saleFk = createdSale.id;

                await models.SaleComponent.create(components, myOptions);
            }

            if (servicesIds && servicesIds.length > 0) {
                const servicesFilter = {
                    where: {id: {inq: servicesIds}}
                };
                const services = await models.TicketService.find(servicesFilter, myOptions);

                for (const service of services) {
                    const refundTicketId = await getTicketRefundId(createSingleTicket, service.ticketFk, refundTickets, mappedTickets);

                    await models.TicketService.create({
                        description: service.description,
                        quantity: - service.quantity,
                        price: service.price,
                        taxClassFk: service.taxClassFk,
                        ticketFk: refundTicketId,
                        ticketServiceTypeFk: service.ticketServiceTypeFk,
                    }, myOptions);
                }
            }

            if (tx) await tx.commit();

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

    async function createTicketRefund(
        ticketId,
        refundTickets,
        mappedTickets,
        now,
        refundAgencyMode,
        refoundZoneId,
        myOptions
    ) {
        const models = Self.app.models;

        const filter = {include: {relation: 'address'}};
        const ticket = await models.Ticket.findById(ticketId, filter, myOptions);

        const refundTicket = await models.Ticket.create({
            clientFk: ticket.clientFk,
            shipped: now,
            addressFk: ticket.address().id,
            agencyModeFk: refundAgencyMode.id,
            nickname: ticket.address().nickname,
            warehouseFk: ticket.warehouseFk,
            companyFk: ticket.companyFk,
            landed: now,
            zoneFk: refoundZoneId
        }, myOptions);

        refundTickets.push(refundTicket);

        mappedTickets.set(ticketId, refundTicket.id);

        await models.TicketRefund.create({
            refundTicketFk: refundTicket.id,
            originalTicketFk: ticket.id,
        }, myOptions);
    }

    async function getTicketRefundId(createSingleTicket, ticketId, refundTickets, mappedTickets) {
        if (createSingleTicket) {
            const [firstRefundTicket] = refundTickets;
            return firstRefundTicket.id;
        } else return mappedTickets.get(ticketId);
    }
};