using SipComponent;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Dispatcher.Sip
{
    interface ISipComponent
    {
        #region Methods

        /// <summary>
        /// Send Call request to a sip id
        /// </summary>
        /// <param name="sipId"></param>
        /// <param name="groupCall"></param>
        void SendCallRequest(string sipId, bool groupCall);

        /// <summary>
        /// Stops ptt
        /// </summary>
        /// <param name="sipId"></param>
        void StopPTT(string sipId);

        /// <summary>
        /// Accepts the sip invite from a sip id
        /// </summary>
        /// <param name="callingSipID">The sip id that has sent the invite</param>
        void AcceptInvite(string callingSipID);

        /// <summary>
        /// Sends a voice buffer in a specified format to the user in dialog with
        /// </summary>
        /// <param name="idToSendVoice">The sip ID of the user</param>
        /// <param name="audioBuffer">The audio buffer</param>
        /// <param name="bufferLength">The length of the buffer</param>
        /// <param name="format">The audio format of the buffer</param>
        void SendAudio(string idToSendVoice, byte[] audioBuffer, int bufferLength, AudioFormat format);

        /// <summary>
        /// Declines an invite form a sip id
        /// </summary>
        /// <param name="idToDeclineCall">The sip id that has sent the invite</param>
        void Decline(string idToDeclineCall);

        /// <summary>
        /// Method used to send an sms to sip id using the sip protocol
        /// <para>This method does not block the calling thread while waiting for the confirmation</para>
        /// </summary>
        /// <param name="idToSendSMS">The sip id where to send the sms</param>
        /// <param name="text">The sms text</param>
        /// <returns>True if the sms was received, else returns false</returns>
        Task<bool> SendSmsAsync(string idToSendSMS, string text);

        /// <summary>
        /// Unregisters from the Sip server and releases the resources
        /// </summary>
        /// <param name="async">If true, the method runs async, without waiting for the complete unregistration</param>
        void Stop(bool async);

        #endregion

        #region Events
        /// <summary>
        /// Occurs when the sip component receives an Invite. SD will accept automatically.
        /// </summary>
        event EventHandler<InviteReceivedArgs> InviteReceived;
        /// <summary>
        /// Occurs when the sip component registration state changes
        /// </summary>
        event EventHandler<RegistrationStateChangedEventArgs> RegistrationStateChanged;
        /// <summary>
        /// Occurs when a sip sms is received by the sip component
        /// </summary>
        event EventHandler<SmsReceivedEventsArgs> SmsReceived;
        /// <summary>
        /// Occurs when a sip dialog is established between SD and a remote sip id
        /// </summary>
        event EventHandler<SipDialogCreatedEventArgs> DialogCreated;
        /// <summary>
        /// Occurs when Sd can send voice to a remote sip id
        /// </summary>
        event EventHandler<SdCanSendVoiceEventArgs> SdCanSendVoice;
        /// <summary>
        /// Occurs when the sip device does not allow Sd to send voice
        /// </summary>
        event EventHandler<SdCannotSendVoiceEventArgs> SdCannotSendVoice;
        /// <summary>
        /// Occurs when Sd receives call init from a remote sip id 
        /// </summary>
        event EventHandler<SdReceivedCallStatusEventArgs> SdReceivesCallInit;
        /// <summary>
        /// Ocurs when Sd receives a voice buffer from a sip id
        /// </summary>
        event EventHandler<SipVoiceReceivedEventArgs> VoiceReceived;
        /// <summary>
        /// Occurs when the sip dialog between sd and a sip id is closed
        /// </summary>
        event EventHandler<SipDialogClosedEventArgs> DialogClosed;
        /// <summary>
        /// Occurs when sd receives stop ptt
        /// </summary>
        event EventHandler<SdReceivedCallStatusEventArgs> SdReceivesStopPTT;
        /// <summary>
        /// An error occured while attempting to establish a sip dialog session
        /// </summary>
        event EventHandler<ErrorEventArgs> ErrorOnCreatingDialog;

        #endregion
    }

    class SdCanSendVoiceEventArgs : EventArgs
    {
        public int TargetSipId { get; private set; }
        public bool GroupCall { get; private set; }

        internal SdCanSendVoiceEventArgs(int targetSipId, bool groupCall)
        {
            this.TargetSipId = targetSipId;
            this.GroupCall = groupCall;
        }
    }

    class SdCannotSendVoiceEventArgs : EventArgs
    {
        public int TargetSipId { get; set; }
        public string Reason { get; set; }

        internal SdCannotSendVoiceEventArgs(int targetSipId, string reason)
        {
            TargetSipId = targetSipId;
            Reason = reason;
        }
    }

    class SdReceivedCallStatusEventArgs : EventArgs
    {
        public bool GroupCall { get; private set; }
        public int SourceCallSipId { get; private set; }

        public int? GroupSipId { get; private set; }

        internal SdReceivedCallStatusEventArgs(int sourceCallSipId, int? groupSipId = null)
        {
            this.SourceCallSipId = sourceCallSipId;
            if (groupSipId.HasValue)
            {
                GroupSipId = groupSipId;
                GroupCall = true;
            }
        }
    }

    class SipDialogClosedEventArgs : EventArgs
    {
        public int SipIdWhoClosed { get; private set; }
        public int SipIdInDialogWith { get; private set; }
        public string GroupId { get; private set; }

        internal SipDialogClosedEventArgs(int sipIdInDialogWith, int sipIdWhoClosed, string groupId)
        {
            this.SipIdInDialogWith = sipIdInDialogWith;
            this.SipIdWhoClosed = sipIdWhoClosed;
            this.GroupId = groupId;
        }
    }

    class SipDialogCreatedEventArgs : EventArgs
    {
        public int SipIdWhoSentInvite { get; set; }
        public int SipIdWhoReceivedInvite { get; set; }
        public int? GroupId { get; set; }

        internal SipDialogCreatedEventArgs(int sipIdWhoSentInvite, int sipIdWhoReceivedInvite, int? groupId)
        {
            this.SipIdWhoSentInvite = sipIdWhoSentInvite;
            this.SipIdWhoReceivedInvite = sipIdWhoReceivedInvite;
            this.GroupId = groupId;
        }
    }

    class SipVoiceReceivedEventArgs : EventArgs
    {
        public byte[] Buffer { get; private set; }
        public int CallSourceId { get; private set; }
        public string GroupId { get; private set; }

        internal SipVoiceReceivedEventArgs(int callSourceId, byte[] buffer, string groupId)
        {
            this.CallSourceId = callSourceId;
            this.Buffer = buffer;
            this.GroupId = groupId;
        }
    }


}