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 * All rights reserved.
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 *   modification, are permitted provided that the following conditions are met:
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 *   this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 */

using System;
using System.Collections.Generic;
using System.Threading;

namespace OpenMetaverse.Utilities
{
    public partial class VoiceManager
    {
        /// <summary>Amount of time to wait for the voice daemon to respond.
        /// The value needs to stay relatively high because some of the calls
        /// require the voice daemon to make remote queries before replying</summary>
        public int BlockingTimeout = 30 * 1000;

        protected Dictionary<int, AutoResetEvent> Events = new Dictionary<int, AutoResetEvent>();

        public List<string> CaptureDevices()
        {
            var evt = new AutoResetEvent(false);
            Events[_CommandCookie] = evt;

            if (RequestCaptureDevices() == -1)
            {
                Events.Remove(_CommandCookie);
                return new List<string>();
            }

            return evt.WaitOne(BlockingTimeout, false) ? CurrentCaptureDevices() : new List<string>();
        }

        public List<string> RenderDevices()
        {
            var evt = new AutoResetEvent(false);
            Events[_CommandCookie] = evt;

            if (RequestRenderDevices() == -1)
            {
                Events.Remove(_CommandCookie);
                return new List<string>();
            }

            return evt.WaitOne(BlockingTimeout, false) ? CurrentRenderDevices() : new List<string>();
        }

        public string CreateConnector(out int status)
        {
            status = 0;

            var evt = new AutoResetEvent(false);
            Events[_CommandCookie] = evt;

            if (RequestCreateConnector() == -1)
            {
                Events.Remove(_CommandCookie);
                return string.Empty;
            }

            var success = evt.WaitOne(BlockingTimeout, false);
            status = statusCode;

            return success && statusCode == 0 ? connectorHandle : string.Empty;
        }

        public string Login(string accountName, string password, string connectorHandle, out int status)
        {
            status = 0;

            var evt = new AutoResetEvent(false);
            Events[_CommandCookie] = evt;

            if (RequestLogin(accountName, password, connectorHandle) == -1)
            {
                Events.Remove(_CommandCookie);
                return string.Empty;
            }

            var success = evt.WaitOne(BlockingTimeout, false);
            status = statusCode;

            return success && statusCode == 0 ? accountHandle : string.Empty;
        }

        protected void RegisterCallbacks()
        {
            OnCaptureDevices += VoiceManager_OnCaptureDevices;
            OnRenderDevices += VoiceManager_OnRenderDevices;
            OnConnectorCreated += VoiceManager_OnConnectorCreated;
            OnLogin += VoiceManager_OnLogin;
        }

        #region Callbacks

        private void VoiceManager_OnCaptureDevices(int cookie, int statusCode, string statusString, string currentDevice)
        {
            if (Events.ContainsKey(cookie))
                Events[cookie].Set();
        }

        private void VoiceManager_OnRenderDevices(int cookie, int statusCode, string statusString, string currentDevice)
        {
            if (Events.ContainsKey(cookie))
                Events[cookie].Set();
        }

        private void VoiceManager_OnConnectorCreated(int cookie, int statusCode, string statusString, string connectorHandle)
        {
            if (Events.ContainsKey(cookie))
                Events[cookie].Set();
        }

        private void VoiceManager_OnLogin(int cookie, int statusCode, string statusString, string accountHandle)
        {
            if (Events.ContainsKey(cookie))
                Events[cookie].Set();
        }

        #endregion Callbacks
    }
}