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

module.exports = Self => {
    Self.remoteMethodCtx('last', {
        description: 'Gets the latest version of a access file',
        accepts: [
            {
                arg: 'appName',
                type: 'string',
                required: true,
                description: 'The app name'
            }
        ],
        returns: {
            type: 'number',
            root: true
        },
        http: {
            path: `/:appName/last`,
            verb: 'GET'
        }
    });

    Self.last = async(ctx, appName) => {
        const models = Self.app.models;
        const versions = await models.MdbVersion.find({
            where: {app: appName},
            fields: ['version']
        });

        if (!versions.length)
            throw new UserError('App name does not exist');

        let maxNumber = 0;
        for (let mdb of versions) {
            if (mdb.version > maxNumber)
                maxNumber = mdb.version;
        }

        let response = {
            version: maxNumber
        };

        return response;
    };
};