/*
* Copyright (c) Contributors, http://www.openmetaverse.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:
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*     * Redistributions in binary form must reproduce the above copyright
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*       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
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*/
using System;
using System.Globalization;
using System.Net;
using System.Net.Sockets;
using libsecondlife;
using OpenSim.Framework.Console;
using OpenSim.Framework.Interfaces;
using OpenSim.Framework.Utilities;

namespace OpenSim.Framework.Types
{
    public class RegionInfo
    {
        public LLUUID SimUUID = new LLUUID();
        public string RegionName = "";

        private IPEndPoint m_internalEndPoint;
        public IPEndPoint InternalEndPoint
        {
            get
            {
                return m_internalEndPoint;
            }
        }

        public IPEndPoint ExternalEndPoint
        {
            get
            {
                // Old one defaults to IPv6
                //return new IPEndPoint( Dns.GetHostAddresses( m_externalHostName )[0], m_internalEndPoint.Port );

                // New method favors IPv4
                IPAddress ia = null;
                foreach (IPAddress Adr in Dns.GetHostAddresses(m_externalHostName))
                {
                    if (ia == null)
                        ia = Adr;

                    if (Adr.AddressFamily == AddressFamily.InterNetwork)
                    {
                        ia = Adr;
                        break;
                    }

                }
                
                return new IPEndPoint(ia, m_internalEndPoint.Port);
            }
        }
        
        private string m_externalHostName;
        public string ExternalHostName
        {
            get
            {
                return m_externalHostName;
            }
        }

        private uint? m_regionLocX;
        public uint RegionLocX
        {
            get
            {
                return m_regionLocX.Value;
            }
        }

        private uint? m_regionLocY;
        public uint RegionLocY
        {
            get
            {
                return m_regionLocY.Value;
            }
        }

        private ulong? m_regionHandle;
        public ulong RegionHandle
        {
            get
            {
                if (!m_regionHandle.HasValue)
                {
                    m_regionHandle = Util.UIntsToLong((RegionLocX * 256), (RegionLocY * 256));
                }

                return m_regionHandle.Value;
            }
        }

        public string DataStore = "";
        public bool isSandbox = false;

        public LLUUID MasterAvatarAssignedUUID = new LLUUID();
        public string MasterAvatarFirstName = "";
        public string MasterAvatarLastName = "";
        public string MasterAvatarSandboxPassword = "";

        public EstateSettings estateSettings;

        public RegionInfo()
        {
            estateSettings = new EstateSettings();
        }

        public RegionInfo(uint regionLocX, uint regionLocY, IPEndPoint internalEndPoint, string externalUri)
            : this()
        {
            m_regionLocX = regionLocX;
            m_regionLocY = regionLocY;

            m_internalEndPoint = internalEndPoint;
            m_externalHostName = externalUri;
        }

        public void InitConfig(bool sandboxMode, IGenericConfig configData)
        {
            this.isSandbox = sandboxMode;
            try
            {
                string attri = "";

                // Sim UUID
                string simId = configData.GetAttribute("SimUUID");
                if (String.IsNullOrEmpty( simId ))
                {
                    this.SimUUID = LLUUID.Random();
                }
                else
                {
                    this.SimUUID = new LLUUID(simId);
                }
                configData.SetAttribute("SimUUID", this.SimUUID.ToString());

                this.RegionName = GetString(configData, "SimName", "OpenSim test", "Region Name");

                //m_regionLocX = (uint) GetInt(configData, "SimLocationX", 1000, "Grid Location X");
                
                attri = "";
                attri = configData.GetAttribute("SimLocationX");
                if (attri == "")
                {
                    string location = MainLog.Instance.CmdPrompt("Grid Location X", "1000");
                    configData.SetAttribute("SimLocationX", location);
                    m_regionLocX = (uint)Convert.ToUInt32(location);
                }
                else
                {
                    m_regionLocX = (uint)Convert.ToUInt32(attri);
                }
                // Sim/Grid location Y
                attri = "";
                attri = configData.GetAttribute("SimLocationY");
                if (attri == "")
                {
                    string location = MainLog.Instance.CmdPrompt("Grid Location Y", "1000");
                    configData.SetAttribute("SimLocationY", location);
                    m_regionLocY = (uint)Convert.ToUInt32(location);
                }
                else
                {
                    m_regionLocY = (uint)Convert.ToUInt32(attri);
                }

                m_regionHandle = null;

                this.DataStore = GetString(configData, "Datastore", "localworld.yap", "Filename for local storage");
                
                IPAddress internalAddress = GetIPAddress(configData, "InternalIPAddress", "0.0.0.0", "Internal IP Address for UDP client connections");
                int internalPort = GetIPPort(configData, "InternalIPPort", "9000", "Internal IP Port for UDP client connections");
                m_internalEndPoint = new IPEndPoint(internalAddress, internalPort);

                m_externalHostName = GetString(configData, "ExternalHostName", "127.0.0.1", "External Host Name");

                estateSettings.terrainFile =
                    GetString(configData, "TerrainFile", "default.r32", "GENERAL SETTING: Default Terrain File");                
                
                attri = "";
                attri = configData.GetAttribute("TerrainMultiplier");
                if (attri == "")
                {
                    string re = MainLog.Instance.CmdPrompt("GENERAL SETTING: Terrain Height Multiplier", "60.0");
                    this.estateSettings.terrainMultiplier = Convert.ToDouble(re, CultureInfo.InvariantCulture);
                    configData.SetAttribute("TerrainMultiplier", this.estateSettings.terrainMultiplier.ToString());
                }
                else
                {
                    this.estateSettings.terrainMultiplier = Convert.ToDouble(attri);
                }

                attri = "";
                attri = configData.GetAttribute("MasterAvatarFirstName");
                if (attri == "")
                {
                    this.MasterAvatarFirstName = MainLog.Instance.CmdPrompt("First name of Master Avatar (Land and Region Owner)", "Test");

                    configData.SetAttribute("MasterAvatarFirstName", this.MasterAvatarFirstName);
                }
                else
                {
                    this.MasterAvatarFirstName = attri;
                }

                attri = "";
                attri = configData.GetAttribute("MasterAvatarLastName");
                if (attri == "")
                {
                    this.MasterAvatarLastName = MainLog.Instance.CmdPrompt("Last name of Master Avatar (Land and Region Owner)", "User");

                    configData.SetAttribute("MasterAvatarLastName", this.MasterAvatarLastName);
                }
                else
                {
                    this.MasterAvatarLastName = attri;
                }

                if (isSandbox) //Sandbox Mode Specific Settings
                {
                    attri = "";
                    attri = configData.GetAttribute("MasterAvatarSandboxPassword");
                    if (attri == "")
                    {
                        this.MasterAvatarSandboxPassword = MainLog.Instance.CmdPrompt("Password of Master Avatar (Needed for sandbox mode account creation only)", "test");

                        //Should I store this?
                        configData.SetAttribute("MasterAvatarSandboxPassword", this.MasterAvatarSandboxPassword);
                    }
                    else
                    {
                        this.MasterAvatarSandboxPassword = attri;
                    }
                }

                configData.Commit();
            }
            catch (Exception e)
            {
                MainLog.Instance.Warn("Config.cs:InitConfig() - Exception occured");
                MainLog.Instance.Warn(e.ToString());
            }

            MainLog.Instance.Verbose("Sim settings loaded:");
            MainLog.Instance.Verbose("UUID: " + this.SimUUID.ToStringHyphenated());
            MainLog.Instance.Verbose("Name: " + this.RegionName);
            MainLog.Instance.Verbose("Region Location: [" + this.RegionLocX.ToString() + "," + this.RegionLocY + "]");
            MainLog.Instance.Verbose("Region Handle: " + this.RegionHandle.ToString());
            MainLog.Instance.Verbose("Listening on IP end point: " + m_internalEndPoint.ToString() );
            MainLog.Instance.Verbose("Sandbox Mode? " + isSandbox.ToString());

        }

        private uint GetInt(IGenericConfig configData, string p, int p_3, string p_4)
        {
            throw new Exception("The method or operation is not implemented.");
        }

        private string GetString(IGenericConfig configData, string attrName, string defaultvalue, string prompt)
        {
            string s = configData.GetAttribute(attrName);

            if (String.IsNullOrEmpty( s ))
            {
                s = MainLog.Instance.CmdPrompt(prompt, defaultvalue);
                configData.SetAttribute(attrName, s );
            }
            return s;
        }

        private IPAddress GetIPAddress(IGenericConfig configData, string attrName, string defaultvalue, string prompt)
        {
            string addressStr = configData.GetAttribute(attrName);

            IPAddress address;

            if (!IPAddress.TryParse(addressStr, out address))
            {
                address =  MainLog.Instance.CmdPromptIPAddress(prompt, defaultvalue);
                configData.SetAttribute(attrName, address.ToString());
            }
            return address;
        }
        
        private int GetIPPort(IGenericConfig configData, string attrName, string defaultvalue, string prompt)
        {
            string portStr = configData.GetAttribute(attrName);

            int port;

            if (!int.TryParse(portStr, out port))
            {
                port = MainLog.Instance.CmdPromptIPPort(prompt, defaultvalue);
                configData.SetAttribute(attrName, port.ToString());
            }
            
            return port;
        }
    }
}