using System;
using System.Collections.Generic;
using System.Threading;

namespace NScript.Install
{
    public class Installer
    {
        private List<IInstallable> _toInstall;

        private bool _isRunning = false;

        private bool _isCompleted = false;
        
        public bool Completed => _isCompleted;

        private string _currentItemName = null;

        public string CurrentlyInstalling => _currentItemName;

        private Thread _worker = null;

        public Installer()
        {
            _toInstall = new List<IInstallable>();
        }
        
        public Installer(IEnumerable<IInstallable> toInstall)
        {
            _toInstall = new List<IInstallable>(toInstall);
        }
        
        public void AddInstallable(IInstallable i)
        {
            if (_isRunning) throw new Exception("Cannot add IInstallable when already installing");
            _toInstall.Add(i);
        }

        public void InstallEverything()
        {
            if (_worker != null) _worker.Join();
            _worker = new Thread(InstallWorker);
            _worker.Start();
        }

        public void WaitForCompletion()
        {
            if (_worker != null) _worker.Join();
            _worker = null;
        }

        private void InstallWorker()
        {
            _isRunning = true;
            foreach (var i in _toInstall)
            {
                _currentItemName = i.Name;
                if (!i.IsInstalled())
                {
                    try
                    {
                        i.Install();
                    }
                    catch (Exception e)
                    {
                        GamecraftModdingAPI.Utility.Logging.LogWarning(
                            $"Failed to install {_currentItemName}: {e.Message}");
                    }
                }
            }
            _isRunning = false;
            _isCompleted = true;
            _currentItemName = null;
        }
    }
}