using System;
using DasConzoleCore;
using DasConzoleCore.Commands;
using DasConzoleCore.UI;
using LyokoCMD.Sim;
using LyokoCMD.Sim.Virtual;
using LyokoCMD.Sim.Virtual.World;
using LyokoCMD.CommandLine.Apps;
using LyokoCMD.Sim.Workers;

namespace LyokoCMD.CommandLine.Commands
{
    public class VirtualWorldCommand : Command
    {
        public override string[] Names => new string[] { "vw" };

        public override string Description => "Contrôle du monde virtuel.";

        public override string HelpText => "Usage : vw [command]\n\tsectors\tListe les territoires.\n\tshow [sector]\tAffiche le territoire passé en paramètre.";

        public override void Run(CommandApp app, string[] args)
        {
            if (args.Length < 1) throw new ArgumentException(HelpText);

            Supercomputer sc = Game.Objects.Get<Supercomputer>();
            if (!sc.Running)
                throw new InvalidOperationException("Impossible de se connecter au supercalculateur.");

            VirtualWorldWorker worker = sc.Workers.Get<VirtualWorldWorker>();
            VirtualWorld vw = Game.Objects.Get<VirtualWorld>();
            switch (args[0].ToLower().Trim())
            {
                case "sectors":
                    if (!worker.Running) throw new InvalidOperationException("Service de monde virtuel inactif.");
                    Console.WriteLine(Text.BuildTable(vw.Sectors));
                    break;
                case "show":
                    if (args.Length < 2) throw new ArgumentException(HelpText);
                    if (!worker.Running) throw new InvalidOperationException("Service de monde virtuel inactif.");
                    new SectorMapApp(
                        vw.Sectors.Find(
                            s => s.ShortName.Equals(args[1],
                            StringComparison.CurrentCultureIgnoreCase
                        )),
                        app.Settings
                    ).Run();
                    break;
                case "start":
                    worker.Start();
                    break;
                case "stop":
                    if (!worker.Running) throw new InvalidOperationException("Service de monde virtuel inactif.");
                    worker.Stop();
                    break;
                case "status":
                    Console.WriteLine("État du service : " + (worker.Running ? "Actif" : "Inactif"));
                    if(!worker.Running) break;
                    Console.WriteLine($"Énergie utilisée : {worker.RequiredEnergy.ToString()}");
                    Console.WriteLine($"{vw.Sectors.Count} territoires");
                    break;
                case "tree":
                    if (!worker.Running) throw new InvalidOperationException("Service de monde virtuel inactif.");
                    Console.WriteLine(vw.Name);
                    PrintTree(vw, "");
                    break;
                default:
                    throw new ArgumentException(HelpText);
            }
        }

        // Constants for drawing lines and spaces
        private const string _cross = "├──";
        private const string _corner = "└──";
        private const string _vertical = "│  ";
        private const string _space = "   ";

        private void PrintTree(IVirtualizableContainer container, string indent) {
            var childrenCount = container.Objects.Count;
            for (var i = 0; i < childrenCount; i++) {
                PrintChild(container.Objects[i], indent, i == childrenCount - 1);
            }
        }

        private void PrintChild(Virtualizable child, string indent, bool isLast) {
            Console.Write(indent);
            if (isLast) {
                Console.Write(_corner);
                indent += _space;
            } else {
                Console.Write(_cross);
                indent += _vertical;
            }
            Console.WriteLine(child);

            if (child is IVirtualizableContainer) PrintTree(child as IVirtualizableContainer, indent);
        }
    }
}