using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using RomCheater.PluginFramework.Interfaces;
using System.Diagnostics;
using libWin32.Win32.Threading;
using RomCheater.Logging;
using System.IO;

namespace RomCheater.PluginFramework.Core
{
    /// <summary>
    /// Base class for all configuration plugins
    /// </summary>
    public abstract class ConfigPlugin : PluginBase, IConfigPlugin
    {
        public ConfigPlugin() : this(false) { }
        public ConfigPlugin(bool doinit) : base() { this.ValidProcessesForPlugin = new List<ProcContainer>(); if(doinit) init(); }

        public override void Reload()
        {
            logger.Debug.WriteLine(" Loading config for {0}...", this.ToString());
            init();
            logger.Debug.WriteLine(" Loaded config for {0}.", this.ToString());
        }
        private void init()
        {
            List<ProcContainer> proc_list = new List<ProcContainer>();
            foreach (Process proc in Process.GetProcesses())
            {
                string proc_name = proc.ProcessName.ToLower();
                try
                {
                    bool isSystem = false;
                    string proc_user = ThreadControl.GetProcessOwner(proc.Handle, out isSystem).ToLower();
                    if (isSystem)
                    {
                        logger.VerboseDebug.WriteLine("    not adding process {0} because it is a system process", proc_name);
                        continue;
                    }
                    ProcContainer container = null;
                    try
                    {
                        container = new ProcContainer(proc);
                        logger.VerboseDebug.WriteLine("  adding process {0} ", proc_name);
                        proc_list.Add(container);
                    }
                    catch (FileNotFoundException) { }
                    catch (Exception ex)
                    {
                        //throw;
                        logger.VerboseError.WriteLine("    not adding process {0} because it thew an exception [{1}]", proc_name, ex.ToString());
                        //continue;
                    }
                }
                catch (System.ComponentModel.Win32Exception ex)
                {
                    if (!((uint)ex.ErrorCode == 0x80004005))
                    {
                        logger.VerboseError.WriteLine("    not adding process {0} because it thew an exception [{1}]", proc_name, ex.ToString());
                    }                   
                    //continue;
                }
                catch (Exception ex)
                {
                    logger.VerboseError.WriteLine("    not adding process {0} because it thew an exception [{1}]", proc_name, ex.ToString());
                    //continue;
                }
            }
            proc_list = proc_list.OrderBy(p => p.Name).ToList();
            Predicate<ProcContainer> predicate = new Predicate<ProcContainer>(IsNotValidProcess);
            proc_list.RemoveAll(predicate);
            ValidProcessesForPlugin = proc_list;
        }

        protected abstract bool IsNotValidProcess(ProcContainer p);

        #region IConfigPlugin Members
        public List<ProcContainer> ValidProcessesForPlugin { get; protected set; }
        public override Guid ID
        {
            get { return new Guid(); }
        }
        public override string Name
        {
            get
            {
                return "Unknown Config Plugin";
            }
        }
        public override string Description
        {
            get
            {
                return "";
            }
        }
        #endregion
    }
}