/*
 * Process Hacker - 
 *   process statistics control
 * 
 * Copyright (C) 2009 wj32
 * 
 * This file is part of Process Hacker.
 * 
 * Process Hacker is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Process Hacker is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Process Hacker.  If not, see <http://www.gnu.org/licenses/>.
 */

using System;
using System.Windows.Forms;
using ProcessHacker.Common;
using ProcessHacker.Native;
using ProcessHacker.Native.Objects;

namespace ProcessHacker.Components
{
    public partial class ProcessStatistics : UserControl
    {
        private int _pid;

        public ProcessStatistics(int pid)
        {
            InitializeComponent();

            _pid = pid;

            if (OSVersion.HasCycleTime)
            {
                labelCPUCyclesText.Text = "Cycles";
            }
            else
            {
                labelCPUCyclesText.Text = "N/A";
            }

            _dontCalculate = false;
        }

        private bool _dontCalculate = true;

        protected override void OnResize(EventArgs e)
        {
            if (_dontCalculate)
                return;

            base.OnResize(e);
        }

        public void ClearStatistics()
        {
            labelCPUPriority.Text = "";
            labelCPUCycles.Text = "";
            labelCPUKernelTime.Text = "";
            labelCPUUserTime.Text = "";
            labelCPUTotalTime.Text = "";

            labelMemoryPB.Text = "";
            labelMemoryWS.Text = "";
            labelMemoryPWS.Text = "";
            labelMemoryVS.Text = "";
            labelMemoryPVS.Text = "";
            labelMemoryPU.Text = "";
            labelMemoryPPU.Text = "";
            labelMemoryPF.Text = "";
            labelMemoryPP.Text = "";

            labelIOReads.Text = "";
            labelIOReadBytes.Text = "";
            labelIOWrites.Text = "";
            labelIOWriteBytes.Text = "";
            labelIOOther.Text = "";
            labelIOOtherBytes.Text = "";
            labelIOPriority.Text = "";

            labelOtherHandles.Text = "";
            labelOtherGDIHandles.Text = "";
            labelOtherUSERHandles.Text = "";
        }

        public void UpdateStatistics()
        {
            if (!Program.ProcessProvider.Dictionary.ContainsKey(_pid))
                return;

            ProcessItem item = Program.ProcessProvider.Dictionary[_pid];

            labelCPUPriority.Text = item.Process.BasePriority.ToString();
            labelCPUKernelTime.Text = Utils.FormatTimeSpan(new TimeSpan(item.Process.KernelTime));
            labelCPUUserTime.Text = Utils.FormatTimeSpan(new TimeSpan(item.Process.UserTime));
            labelCPUTotalTime.Text = Utils.FormatTimeSpan(new TimeSpan(item.Process.KernelTime + item.Process.UserTime));

            labelMemoryPB.Text = Utils.FormatSize(item.Process.VirtualMemoryCounters.PrivatePageCount);
            labelMemoryWS.Text = Utils.FormatSize(item.Process.VirtualMemoryCounters.WorkingSetSize);
            labelMemoryPWS.Text = Utils.FormatSize(item.Process.VirtualMemoryCounters.PeakWorkingSetSize);
            labelMemoryVS.Text = Utils.FormatSize(item.Process.VirtualMemoryCounters.VirtualSize);
            labelMemoryPVS.Text = Utils.FormatSize(item.Process.VirtualMemoryCounters.PeakVirtualSize);
            labelMemoryPU.Text = Utils.FormatSize(item.Process.VirtualMemoryCounters.PagefileUsage);
            labelMemoryPPU.Text = Utils.FormatSize(item.Process.VirtualMemoryCounters.PeakPagefileUsage);
            labelMemoryPF.Text = ((ulong)item.Process.VirtualMemoryCounters.PageFaultCount).ToString("N0");

            labelIOReads.Text = ((ulong)item.Process.IoCounters.ReadOperationCount).ToString("N0");
            labelIOReadBytes.Text = Utils.FormatSize(item.Process.IoCounters.ReadTransferCount);
            labelIOWrites.Text = ((ulong)item.Process.IoCounters.WriteOperationCount).ToString("N0");
            labelIOWriteBytes.Text = Utils.FormatSize(item.Process.IoCounters.WriteTransferCount);
            labelIOOther.Text = ((ulong)item.Process.IoCounters.OtherOperationCount).ToString("N0");
            labelIOOtherBytes.Text = Utils.FormatSize(item.Process.IoCounters.OtherTransferCount);

            labelOtherHandles.Text = ((ulong)item.Process.HandleCount).ToString("N0");

            if (_pid > 0)
            {
                try
                {
                    using (var phandle = new ProcessHandle(_pid, Program.MinProcessQueryRights))
                    {
                        labelOtherGDIHandles.Text = phandle.GetGuiResources(false).ToString("N0");
                        labelOtherUSERHandles.Text = phandle.GetGuiResources(true).ToString("N0");

                        if (OSVersion.HasCycleTime)
                            labelCPUCycles.Text = phandle.GetCycleTime().ToString("N0");
                        else
                            labelCPUCycles.Text = "N/A";

                        if (OSVersion.IsAboveOrEqual(WindowsVersion.Vista))
                        {
                            labelMemoryPP.Text = phandle.GetPagePriority().ToString();
                            labelIOPriority.Text = phandle.GetIoPriority().ToString();
                        }
                    }
                }
                catch
                { }
            }
            else
            {
                labelOtherGDIHandles.Text = "0";
                labelOtherUSERHandles.Text = "0";
                labelCPUCycles.Text = "0";
                labelMemoryPP.Text = "0";
                labelIOPriority.Text = "0";
            }
        }

        private void buttonHandleDetails_Click(object sender, EventArgs e)
        {
            try
            {
                (new HandleStatisticsWindow(_pid)).ShowDialog();
            }
            catch (Exception ex)
            {
                PhUtils.ShowException("Unable to show handle statistics", ex);
            }
        }
    }
}