/*
* 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 OpenSim 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.Collections.Generic;
using System.Text;

namespace OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.LSO
{
    public partial class LSL_BaseClass
    {
        /*
         * OPCODES
         *
         * These are internal "assembly" commands,
         *  basic operators like "ADD", "PUSH" and "POP"
         * 
         * It also contains managed stack and keeps track of internal variables, etc.
         * 
         */


        public void StoreToLocal(UInt32 index)
        {
            // TODO: How to determine local?
            Common.SendToDebug("::StoreToLocal " + index);
            if (LocalVariables.ContainsKey(index))
                LocalVariables.Remove(index);
            LocalVariables.Add(index, LSLStack.Peek());
        }
        public void StoreToGlobal(UInt32 index)
        {
            Common.SendToDebug("::StoreToGlobal " + index);
            if (GlobalVariables.ContainsKey(index))
                GlobalVariables.Remove(index);
            GlobalVariables.Add(index, LSLStack.Peek());
        }
        public void StoreToStatic(UInt32 index)
        {
            Common.SendToDebug("::StoreToStatic " + index);
            //if (StaticVariables.ContainsKey(index))
            //    StaticVariables.Remove(index);
            StaticVariables.Add(index, LSLStack.Peek());
        }
        public void GetFromLocal(UInt32 index)
        {
            // TODO: How to determine local?
            Common.SendToDebug("::GetFromLocal " + index);
            object ret;
            LocalVariables.TryGetValue(index, out ret);
            LSLStack.Push(ret);
            //return ret;
        }
        public void GetFromGlobal(UInt32 index)
        {
            Common.SendToDebug("::GetFromGlobal " + index);
            object ret;
            GlobalVariables.TryGetValue(index, out ret);
            LSLStack.Push(ret);
            //return ret;
        }
        public void GetFromStatic(UInt32 index)
        {
            Common.SendToDebug("::GetFromStatic " + index);
            object ret;
            StaticVariables.TryGetValue(index, out ret);
            Common.SendToDebug("::GetFromStatic - ObjectType: " + ret.GetType().ToString());
            LSLStack.Push(ret);
            //return ret;
        }

        public object POPToStack()
        {
            Common.SendToDebug("::POPToStack");
            //return LSLStack.Pop();
            object p = LSLStack.Pop();
            if (p.GetType() == typeof(UInt32))
                return (UInt32)p;
            if (p.GetType() == typeof(string))
                return (string)p;
            if (p.GetType() == typeof(Int32))
                return (Int32)p;
            if (p.GetType() == typeof(UInt16))
                return (UInt16)p;
            if (p.GetType() == typeof(float))
                return (float)p;
            if (p.GetType() == typeof(LSO_Enums.Vector))
                return (LSO_Enums.Vector)p;
            if (p.GetType() == typeof(LSO_Enums.Rotation))
                return (LSO_Enums.Rotation)p;
            if (p.GetType() == typeof(LSO_Enums.Key))
                return (LSO_Enums.Key)p;

            return p;
        }

        //public object POPToStack(UInt32 count)
        //{
        //    // POP NUMBER FROM TOP OF STACK
        //    //LSLStack.SetLength(LSLStack.Length - 4);
        //    Common.SendToDebug("::POPToStack " + count);
        //    if (count < 2)
        //        return LSLStack.Pop();

        //    Stack<object> s = new Stack<object>();
        //    for (int i = 0; i < count; i++)
        //    {
        //        s.Push(LSLStack.Pop);

        //    }

        //}

        public void POP()
        {
            // POP NUMBER FROM TOP OF STACK
            //LSLStack.SetLength(LSLStack.Length - 4);
            Common.SendToDebug("::POP");
            if (LSLStack.Count < 1)
            {
                //TODO: Temporary fix
                Common.SendToDebug("ERROR: TRYING TO POP EMPTY STACK!");
            }
            else
            {
                LSLStack.Pop();
            }
        }
        public void PUSH(object Param)
        {
            if (Param == null)
            {
                Common.SendToDebug("::PUSH: <null>");
            }
            else
            {

                //Common.SendToDebug("::PUSH: " + Param.GetType());
            }

            LSLStack.Push(Param);
        }
        public void ADD(UInt32 Param)
        {
            Common.SendToDebug("::ADD: " + Param);
            object o2 = LSLStack.Pop();
            object o1 = LSLStack.Pop();
            Common.SendToDebug("::ADD: Debug: o1: " + o1.GetType() + " (" + o1.ToString() + "), o2: " + o2.GetType() + " (" + o2.ToString() + ")");
            if (o2.GetType() == typeof(string))
            {
                LSLStack.Push((string)o1 + (string)o2);
                return;
            }
            if (o2.GetType() == typeof(UInt32))
            {
                LSLStack.Push((UInt32)o1 + (UInt32)o2);
                return;
            }

        }
        public void SUB(UInt32 Param)
        {
            Common.SendToDebug("::SUB: " + Param);
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            LSLStack.Push((UInt32)(i1 - i2));
        }
        public void MUL(UInt32 Param)
        {
            Common.SendToDebug("::SUB: " + Param);
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            LSLStack.Push((UInt32)(i1 * i2));
        }
        public void DIV(UInt32 Param)
        {
            Common.SendToDebug("::DIV: " + Param);
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            LSLStack.Push((UInt32)(i1 / i2));
        }


        public void MOD(UInt32 Param)
        {
            Common.SendToDebug("::MOD: " + Param);
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            LSLStack.Push((UInt32)(i1 % i2));
        }
        public void EQ(UInt32 Param)
        {
            Common.SendToDebug("::EQ: " + Param);
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            if (i1 == i2)
            {
                LSLStack.Push((UInt32)1);
            }
            else
            {
                LSLStack.Push((UInt32)0);
            }
        }
        public void NEQ(UInt32 Param)
        {
            Common.SendToDebug("::NEQ: " + Param);
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            if (i1 != i2)
            {
                LSLStack.Push((UInt32)1);
            }
            else
            {
                LSLStack.Push((UInt32)0);
            }
        }
        public void LEQ(UInt32 Param)
        {
            Common.SendToDebug("::LEQ: " + Param);
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            if (i1 <= i2)
            {
                LSLStack.Push((UInt32)1);
            }
            else
            {
                LSLStack.Push((UInt32)0);
            }
        }
        public void GEQ(UInt32 Param)
        {
            Common.SendToDebug("::GEQ: " + Param);
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            if (i1 >= i2)
            {
                LSLStack.Push((UInt32)1);
            }
            else
            {
                LSLStack.Push((UInt32)0);
            }
        }
        public void LESS(UInt32 Param)
        {
            Common.SendToDebug("::LESS: " + Param);
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            if (i1 < i2)
            {
                LSLStack.Push((UInt32)1);
            }
            else
            {
                LSLStack.Push((UInt32)0);
            }
        }
        public void GREATER(UInt32 Param)
        {
            Common.SendToDebug("::GREATER: " + Param);
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            if (i1 > i2)
            {
                LSLStack.Push((UInt32)1);
            }
            else
            {
                LSLStack.Push((UInt32)0);
            }
        }



        public void BITAND()
        {
            Common.SendToDebug("::BITAND");
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            LSLStack.Push((UInt32)(i1 & i2));
        }
        public void BITOR()
        {
            Common.SendToDebug("::BITOR");
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            LSLStack.Push((UInt32)(i1 | i2));
        }
        public void BITXOR()
        {
            Common.SendToDebug("::BITXOR");
            UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            LSLStack.Push((UInt32)(i1 ^ i2));
        }
        public void BOOLAND()
        {
            Common.SendToDebug("::BOOLAND");
            bool b2 = bool.Parse((string)LSLStack.Pop());
            bool b1 = bool.Parse((string)LSLStack.Pop());
            if (b1 && b2)
            {
                LSLStack.Push((UInt32)1);
            }
            else
            {
                LSLStack.Push((UInt32)0);
            }
        }
        public void BOOLOR()
        {
            Common.SendToDebug("::BOOLOR");
            bool b2 = bool.Parse((string)LSLStack.Pop());
            bool b1 = bool.Parse((string)LSLStack.Pop());

            if (b1 || b2)
            {
                LSLStack.Push((UInt32)1);
            }
            else
            {
                LSLStack.Push((UInt32)0);
            }

        }
        public void NEG(UInt32 Param)
        {
            Common.SendToDebug("::NEG: " + Param);
            //UInt32 i2 = (UInt32)LSLStack.Pop();
            UInt32 i1 = (UInt32)LSLStack.Pop();
            LSLStack.Push((UInt32)(i1 * -1));
        }
        public void BITNOT()
        {
            //Common.SendToDebug("::BITNOT");
            //UInt32 i2 = (UInt32)LSLStack.Pop();
            //UInt32 i1 = (UInt32)LSLStack.Pop();
            //LSLStack.Push((UInt32)(i1 / i2));
        }
        public void BOOLNOT()
        {
            //Common.SendToDebug("::BOOLNOT");
            ////UInt32 i2 = (UInt32)LSLStack.Pop();
            //UInt32 i1 = (UInt32)LSLStack.Pop();
            //LSLStack.Push((UInt32)(i1));
        }


    }
}