using CollabVMClient.ViewModels;
using CollabVMSharp;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;

namespace CollabVMClient
{
    public static class Utilities
    {
        /// <summary>
        /// Return view models for each node a cvm server offers
        /// </summary>
        public static async Task<CVMNodeViewModel[]> GetNodes(string url)
        {
            var cvm = new CollabVMSharp.CollabVMClient(url);
            await cvm.Connect();
            var nodes = await cvm.ListVMs();
            await cvm.Disconnect();
            var nodelist = new List<CVMNodeViewModel>();
            foreach (var node in nodes)
            {
                using var ms = new MemoryStream(node.Thumbnail);
                nodelist.Add(new CVMNodeViewModel(url, node.ID, node.Name, new Avalonia.Media.Imaging.Bitmap(ms)));
            }
            return nodelist.ToArray();
        }

        public static void WriteDefaultConfig()
        {
            var cj = JsonSerializer.Serialize(Constants.DefaultConfig);
            File.WriteAllText("config.json", cj);
        }

        public static IConfig LoadConfig()
        {
            try
            {
                var cr = File.ReadAllText("config.json");
                var c = JsonSerializer.Deserialize<IConfig>(cr);
                if (c == null)
                {
                    Utilities.WriteDefaultConfig();
                    return Constants.DefaultConfig;
                }
                else return c;
            }
            catch (FileNotFoundException)
            {
                Utilities.WriteDefaultConfig();
                return Constants.DefaultConfig;
            }
        }
    }
}