const mergeFilters = require('vn-loopback/util/filter').mergeFilters;

module.exports = Self => {
    Self.remoteMethod('editPrices', {
        description: 'Changes the price and bonus of a delivery day',
        accessType: 'WRITE',
        accepts: [{
            arg: 'id',
            type: 'Number',
            description: 'The zone id',
            http: {source: 'path'}
        },
        {
            arg: 'delivered',
            type: 'Date',
            required: true,
        },
        {
            arg: 'price',
            type: 'Number',
            required: true,
        },
        {
            arg: 'bonus',
            type: 'Number',
            required: true,
        },
        {
            arg: 'option',
            type: 'String',
            required: true,
        }],
        returns: {
            type: 'object',
            root: true
        },
        http: {
            path: `/:id/editPrices`,
            verb: 'POST'
        }
    });

    Self.editPrices = async(id, delivered, price, bonus, option) => {
        const models = Self.app.models;

        let filter = {
            where: {
                zoneFk: id
            }
        };

        let where;
        let shouldPropagate = true;

        if (option == 'Only this day') {
            shouldPropagate = false;
            where = {delivered};
        } else if (option == 'From this day') {
            where = {
                delivered: {
                    gte: delivered
                }
            };
        }

        filter = mergeFilters(filter, {where});

        const days = await models.ZoneCalendar.find(filter);
        const areAllFromSameZone = days.every(day => day.zoneFk === id);

        if (!areAllFromSameZone)
            throw new UserError('All delivery days must belong to the same zone');

        if (shouldPropagate) {
            const zone = await models.Zone.findById(id);
            zone.updateAttributes({price, bonus});
        }

        return models.ZoneCalendar.updateAll(filter.where, {price, bonus});
    };
};