/*
* 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.Runtime.Remoting.Lifetime;
using System.Text;

namespace OpenSim.Region.ScriptEngine.Common
{
    public abstract class ExecutorBase : MarshalByRefObject
    {
        /// <summary>
        /// Contains the script to execute functions in.
        /// </summary>
        protected IScript m_Script;
        /// <summary>
        /// If set to False events will not be executed.
        /// </summary>
        protected bool m_Running = true;

        /// <summary>
        /// Create a new instance of ExecutorBase
        /// </summary>
        /// <param name="Script"></param>
        public ExecutorBase(IScript Script)
        {
            m_Script = Script;
        }

        /// <summary>
        /// Make sure our object does not timeout when in AppDomain. (Called by ILease base class)
        /// </summary>
        /// <returns></returns>
        public override Object InitializeLifetimeService()
        {
            //Console.WriteLine("Executor: InitializeLifetimeService()");
            //            return null;
            ILease lease = (ILease)base.InitializeLifetimeService();

            if (lease.CurrentState == LeaseState.Initial)
            {
                lease.InitialLeaseTime = TimeSpan.Zero; // TimeSpan.FromMinutes(1);
                //                lease.SponsorshipTimeout = TimeSpan.FromMinutes(2);
                //                lease.RenewOnCallTime = TimeSpan.FromSeconds(2);
            }
            return lease;
        }

        /// <summary>
        /// Get current AppDomain
        /// </summary>
        /// <returns>Current AppDomain</returns>
        public AppDomain GetAppDomain()
        {
            return AppDomain.CurrentDomain;
        }

        /// <summary>
        /// Execute a specific function/event in script.
        /// </summary>
        /// <param name="FunctionName">Name of function to execute</param>
        /// <param name="args">Arguments to pass to function</param>
        public void ExecuteEvent(string FunctionName, object[] args)
        {
            if (m_Running == false)
            {
                // Script is inactive, do not execute!
                return;
            }
            DoExecuteEvent(FunctionName, args);
        }
        protected abstract void DoExecuteEvent(string FunctionName, object[] args);

        /// <summary>
        /// Stop script from running. Event execution will be ignored.
        /// </summary>
        public void StopScript()
        {
            m_Running = false;
        }
    }
}