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, 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 salesIds = sales.map(sale => sale.id);

            const canEditSale = await models.Sale.canEdit(ctx, salesIds, myOptions);
            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.updateAll({id: sale.id}, {reserved: reserved}, myOptions);

                    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']
                            }
                        }
                    }
                }
            }, myOptions);

            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, myOptions);
            }

            if (tx) await tx.commit();

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