using System;
using System.IO;
using UnityEngine;
using System.Linq;
using System.Runtime.InteropServices;

namespace Game
{
    public class ApplicationManager : MonoBehaviour
    {
#if UNITY_STANDALONE_WIN
        [DllImport("Kernel32.dll")]
        private static extern bool AllocConsole();
#endif

        private const int Fps = 60;
        private const int HeadlessFps = 60;

        private static bool? _headless;

        public static bool Headless
        {
            get
            {
                if (!_headless.HasValue)
                    _headless = Environment.GetCommandLineArgs().Contains("-batchmode");

                return _headless.Value;
            }
        }

        private void Awake()
        {
            DontDestroyOnLoad(gameObject);

#if UNITY_STANDALONE_WIN
            Application.targetFrameRate = Headless ? HeadlessFps : Fps;

            if (Headless)
            {
                // set up console
                {
                    AllocConsole();
                    Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) {AutoFlush = true});
                    //Console.SetIn(new StreamReader(Console.OpenStandardInput())); // doesn't work
                    Application.logMessageReceivedThreaded +=
                        (condition, stackTrace, type) => Console.WriteLine(condition + " " + stackTrace);
                }

                AudioListener.volume = 0f;
            }
#endif
        }
    }
}