/*
 * WmiSettingsHandler
 *
 * Copyright 2018 Raising the Floor - US
 *
 * Licensed under the New BSD license. You may not use this file except in
 * compliance with this License.
 *
 * You may obtain a copy of the License at
 * https://github.com/GPII/universal/blob/master/LICENSE.txt
 */

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Linq;
using System.Management;

/// <summary>
/// Entry point to make a generic query to WMI through edge.js.
/// </summary>
public class Startup {
    public async Task<object> Invoke(object input) {
        var payload = input as object[];
        string pNamespace = payload[0] as string;
        string pQuery = payload[1] as string;

        List<object> results = new List<object>();

        if (pQuery == null) {
            throw new ArgumentException("Error: Query should be of string type");
        }

        // Define scope (namespace)
        ManagementScope scope = new ManagementScope(pNamespace);
        // Define query
        SelectQuery query = new SelectQuery(pQuery);

        ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);
        ManagementObjectCollection objectCollection = searcher.Get();
        var firstObject = objectCollection.OfType<ManagementObject>().FirstOrDefault();
        var selectedItem = firstObject.Properties.OfType<PropertyData>().FirstOrDefault();

        return selectedItem.Value;
    }
}