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

module.exports = Self => {
    Self.remoteMethodCtx('deleteSales', {
        description: 'Deletes the selected sales',
        accessType: 'WRITE',
        accepts: [{
            arg: 'sales',
            type: ['object'],
            required: true,
            description: 'The sales to remove'
        },
        {
            arg: 'ticketId',
            type: 'number',
            required: true,
            description: 'The ticket id'
        }],
        returns: {
            type: ['object'],
            root: true
        },
        http: {
            path: `/deleteSales`,
            verb: 'POST'
        }
    });

    Self.deleteSales = async(ctx, sales, ticketId, options) => {
        const $t = ctx.req.__; // $translate
        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 canEditSales = await models.Sale.canEdit(ctx, sales, myOptions);

            const ticket = await models.Ticket.findById(ticketId, {
                include: {
                    relation: 'client',
                    scope: {
                        include: {
                            relation: 'salesPersonUser',
                            scope: {
                                fields: ['id', 'name']
                            }
                        }
                    }
                }
            }, myOptions);

            const isTicketEditable = await models.Ticket.isEditable(ctx, ticketId, myOptions);
            if (!isTicketEditable)
                throw new UserError(`The sales of this ticket can't be modified`);

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

            const promises = [];
            let deletions = '';
            for (let sale of sales) {
                const deletedSale = models.Sale.destroyById(sale.id, myOptions);
                deletions += `\r\n-${sale.itemFk}: ${sale.concept} (${sale.quantity})`;

                promises.push(deletedSale);
            }

            const salesPerson = ticket.client().salesPersonUser();
            if (salesPerson) {
                const origin = ctx.req.headers.origin;

                const message = $t('Deleted sales from ticket', {
                    ticketId: ticketId,
                    ticketUrl: `${origin}/#!/ticket/${ticketId}/sale`,
                    deletions: deletions
                });
                await models.Chat.sendCheckingPresence(ctx, salesPerson.id, message, myOptions);
            }

            const deletedSales = await Promise.all(promises);

            if (tx) await tx.commit();

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