const UserError = require('vn-loopback/util/user-error');
module.exports = Self => {
    Self.remoteMethodCtx('recalculatePrice', {
        description: 'Calculates the price of a sale and its components',
        accessType: 'WRITE',
        accepts: [{
            arg: 'id',
            description: 'The sale id',
            type: 'number',
            required: true,
            http: {source: 'path'}
        }],
        returns: {
            type: 'Number',
            root: true
        },
        http: {
            path: `/:id/recalculatePrice`,
            verb: 'post'
        }
    });

    Self.recalculatePrice = async(ctx, id, 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 sale = await Self.findById(id, null, myOptions);
            const isEditable = await models.Ticket.isEditable(ctx, sale.ticketFk, myOptions);

            if (!isEditable)
                throw new UserError(`The sales of this ticket can't be modified`);

            const canEditSale = await models.Sale.canEdit(ctx, [id], myOptions);

            if (!canEditSale)
                throw new UserError(`Sale(s) blocked, please contact production`);

            const recalculation = await Self.rawSql('CALL vn.sale_calculateComponent(?, null)', [id], myOptions);

            if (tx) await tx.commit();

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