var ghostBookshelf = require('./base'),

    Permission,
    Permissions;

Permission = ghostBookshelf.Model.extend({

    tableName: 'permissions',

    roles: function () {
        return this.belongsToMany('Role');
    },

    users: function () {
        return this.belongsToMany('User');
    },

    apps: function () {
        return this.belongsToMany('App');
    }
}, {
    /**
    * Returns an array of keys permitted in a method's `options` hash, depending on the current method.
    * @param {String} methodName The name of the method to check valid options for.
    * @return {Array} Keys allowed in the `options` hash of the model's method.
    */
    permittedOptions: function (methodName) {
        var options = ghostBookshelf.Model.permittedOptions(),

            // whitelists for the `options` hash argument on methods, by method name.
            // these are the only options that can be passed to Bookshelf / Knex.
            validOptions = {
                add: ['user']
            };

        if (validOptions[methodName]) {
            options = options.concat(validOptions[methodName]);
        }

        return options;
    }
});

Permissions = ghostBookshelf.Collection.extend({
    model: Permission
});

module.exports = {
    Permission: ghostBookshelf.model('Permission', Permission),
    Permissions: ghostBookshelf.collection('Permissions', Permissions)
};