const UserError = require('vn-loopback/util/user-error');
module.exports = Self => {
    Self.remoteMethod('hasItemOlder', {
        description:
            'Get boolean if any or specific item of the shelving has older created in another shelving or parking',
        accessType: 'READ',
        accepts: [{
            arg: 'shelvingFkIn',
            type: 'string',
            required: true,
            description: 'Shelving code'
        },
        {
            arg: 'parking',
            type: 'string',
            description: 'Parking code'
        },
        {
            arg: 'shelvingFkOut',
            type: 'string',
            description: 'Shelving code'
        },
        {
            arg: 'itemFk',
            type: 'integer',
            description: 'Item id'
        }],
        returns: {
            type: 'boolean',
            root: true
        },
        http: {
            path: `/hasItemOlder`,
            verb: 'GET'
        }
    });

    Self.hasItemOlder = async(shelvingFkIn, parking, shelvingFkOut, itemFk, options) => {
        if (!parking && !shelvingFkOut) throw new UserError('Missing data: parking or shelving');

        const myOptions = {};
        if (typeof options == 'object')
            Object.assign(myOptions, options);

        const result = await Self.rawSql(`
            SELECT COUNT(ish.id) countItemOlder
                FROM vn.itemShelving ish
                    JOIN (
                        SELECT ish.itemFk, created,shelvingFk
                            FROM vn.itemShelving ish
                                JOIN vn.shelving s ON ish.shelvingFk = s.code
                            WHERE ish.shelvingFk = ?
                        )sub ON sub.itemFK = ish.itemFk
                    JOIN vn.shelving s ON s.code = ish.shelvingFk 
                    JOIN vn.parking p ON p.id = s.parkingFk 
                WHERE sub.created > ish.created 
                    AND (p.code <> ? OR ? IS NULL)
                    AND (ish.shelvingFk <> ? OR ? IS NULL)
                    AND (ish.itemFk <> ? OR ? IS NULL)`,
        [shelvingFkIn, parking, parking, shelvingFkOut, shelvingFkOut, itemFk, itemFk], myOptions);
        return result[0]['countItemOlder'] > 0;
    };
};