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

module.exports = Self => {
    Self.remoteMethodCtx('reserve', {
        description: 'Change the state of a ticket',
        accessType: 'WRITE',
        accepts: [
            {
                arg: 'ticketId',
                type: 'number',
                required: true,
                description: 'The ticket id'
            },
            {
                arg: 'sales',
                type: ['object'],
                required: true,
                description: 'The sale to reserve'
            },
            {
                arg: 'reserved',
                type: 'boolean',
                required: true
            }
        ],
        returns: {
            type: ['object'],
            root: true
        },
        http: {
            path: `/reserve`,
            verb: 'POST'
        }
    });

    Self.reserve = async(ctx, ticketId, sales, reserved) => {
        const $t = ctx.req.__; // $translate
        const models = Self.app.models;

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

        const canEditSale = await models.Sale.canEdit(ctx, sales);

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

        let changesMade = '';
        const promises = [];

        for (let sale of sales) {
            if (sale.reserved != reserved) {
                const oldState = sale.reserved ? 'reserved' : 'regular';
                const newState = reserved ? 'reserved' : 'regular';

                const reservedSale = models.Sale.update({id: sale.id}, {reserved: reserved});

                promises.push(reservedSale);

                changesMade += `\r\n-${sale.itemFk}: ${sale.concept} (${sale.quantity}) ${$t('State')}: ${$t(oldState)} ➔ *${$t(newState)}*`;
            }
        }

        const result = await Promise.all(promises);

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

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

            const message = $t('Changed sale reserved state', {
                ticketId: ticketId,
                ticketUrl: `${origin}/#!/ticket/${ticketId}/sale`,
                changes: changesMade
            });
            await models.Chat.sendCheckingPresence(ctx, salesPerson.id, message);
        }

        return result;
    };
};