const UserError = require('vn-loopback/util/user-error');

module.exports = Self => {
    Self.remoteMethodCtx('refund', {
        description: 'Create ticket refund with lines and services changing the sign to the quantites',
        accessType: 'WRITE',
        accepts: [{
            arg: 'sales',
            description: 'The sales',
            type: ['object'],
            required: false
        },
        {
            arg: 'services',
            type: ['object'],
            required: false,
            description: 'The services'
        }],
        returns: {
            type: 'number',
            root: true
        },
        http: {
            path: `/refund`,
            verb: 'post'
        }
    });

    Self.refund = async(ctx, sales, services, options) => {
        const myOptions = {};
        let tx;

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

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

        try {
            const userId = ctx.req.accessToken.userId;

            const isClaimManager = await Self.app.models.Account.hasRole(userId, 'claimManager');
            const isSalesAssistant = await Self.app.models.Account.hasRole(userId, 'salesAssistant');
            const hasValidRole = isClaimManager || isSalesAssistant;

            if (!hasValidRole)
                throw new UserError(`You don't have privileges to create refund`);

            const salesIds = [];
            if (sales) {
                for (let sale of sales)
                    salesIds.push(sale.id);
            } else
                salesIds.push(null);

            const servicesIds = [];
            if (services) {
                for (let service of services)
                    servicesIds.push(service.id);
            } else
                servicesIds.push(null);

            const query = `
                DROP TEMPORARY TABLE IF EXISTS tmp.sale;
                DROP TEMPORARY TABLE IF EXISTS tmp.ticketService;

                CREATE TEMPORARY TABLE tmp.sale
                    SELECT s.id, s.itemFk, s.quantity, s.concept, s.price, s.discount, s.ticketFk
                        FROM sale s
                        WHERE s.id IN (?);

                CREATE TEMPORARY TABLE tmp.ticketService
                    SELECT ts.description, ts.quantity, ts.price, ts.taxClassFk, ts.ticketServiceTypeFk, ts.ticketFk
                        FROM ticketService ts 
                        WHERE ts.id IN (?);

                CALL vn.ticket_doRefund(@newTicket);

                DROP TEMPORARY TABLE tmp.sale;
                DROP TEMPORARY TABLE tmp.ticketService;`;

            await Self.rawSql(query, [salesIds, servicesIds], myOptions);

            const [newTicket] = await Self.rawSql('SELECT @newTicket id', null, myOptions);
            const newTicketId = newTicket.id;

            if (tx) await tx.commit();

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