/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the OpenSimulator Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Diagnostics;
using System.Text;
using OpenMetaverse;
using OpenMetaverse.StructuredData;

namespace OpenSim.Framework.Monitoring
{
    /// <summary>
    /// Statistics which all collectors are interested in reporting
    /// </summary>
    public class BaseStatsCollector : IStatsCollector
    {
        public virtual string Report(IScene scene = null)
        {
            return string.Empty;
        }

        public virtual string Report()
        {
            StringBuilder sb = new StringBuilder(Environment.NewLine);
            sb.Append("MEMORY STATISTICS");
            sb.Append(Environment.NewLine);
            sb.AppendFormat(
                "Heap allocated to OpenSim   : {0} MB\n",
                Math.Round(GC.GetTotalMemory(false) / 1024.0 / 1024.0));

            sb.AppendFormat(
                "Heap allocation rate (last/avg): {0}/{1}MB/s\n",
                Math.Round((MemoryWatchdog.LastHeapAllocationRate * 1000) / 1048576.0, 3),
                Math.Round((MemoryWatchdog.AverageHeapAllocationRate * 1000) / 1048576.0, 3));

            try
            {
                using (Process myprocess = Process.GetCurrentProcess())
                {
                    sb.AppendFormat(
                            "Process memory:      Physical {0} MB \t Paged {1} MB \t Virtual {2} MB\n",
                            Math.Round(myprocess.WorkingSet64 / 1024.0 / 1024.0),
                            Math.Round(myprocess.PagedMemorySize64 / 1024.0 / 1024.0),
                            Math.Round(myprocess.VirtualMemorySize64 / 1024.0 / 1024.0));
                    sb.AppendFormat(
                            "Peak process memory: Physical {0} MB \t Paged {1} MB \t Virtual {2} MB\n",
                            Math.Round(myprocess.PeakWorkingSet64 / 1024.0 / 1024.0),
                            Math.Round(myprocess.PeakPagedMemorySize64 / 1024.0 / 1024.0),
                            Math.Round(myprocess.PeakVirtualMemorySize64 / 1024.0 / 1024.0));
                    sb.AppendFormat("\nTotal process Threads {0}\n", myprocess.Threads.Count);
                }
            }
            catch
            { }
//            else
//                sb.Append("Process reported as Exited \n");

            return sb.ToString();
        }

        public virtual string XReport(string uptime, string version)
        {
            return (string)Math.Round(GC.GetTotalMemory(false) / 1024.0 / 1024.0).ToString();
        }

        public virtual OSDMap OReport(string uptime, string version)
        {
            OSDMap ret = new OSDMap();
            ret.Add("TotalMemory", new OSDReal(Math.Round(GC.GetTotalMemory(false) / 1024.0 / 1024.0)));
            return ret;
        }

        public virtual string XReport(string uptime, string version, string scene)
        {
            return (string)Math.Round(GC.GetTotalMemory(false) / 1024.0 / 1024.0).ToString();
        }

        public virtual OSDMap OReport(string uptime, string version, string scene)
        {
            OSDMap ret = new OSDMap();
            ret.Add("TotalMemory", new OSDReal(Math.Round(GC.GetTotalMemory(false) / 1024.0 / 1024.0)));
            return ret;
        }
    }
}
