/// Call session data model for audio/video calling
/// Stores all information about an active call

enum CallType { audio, video }

enum CallDirection { outgoing, incoming }

enum CallStatus {
  idle,
  checkingPermissions,
  outgoingRinging,
  incomingRinging,
  connecting,
  connected,
  ended
}

class CallSession {
  final String callId;
  final CallType type;
  final CallDirection direction;
  final String peerId; // Employee number
  final String peerName;
  final String? peerAvatar;
  final DateTime startTime;
  String? sessionId; // For SDP/ICE correlation
  String? sdpOffer;
  String? sdpAnswer;

  CallSession({
    required this.callId,
    required this.type,
    required this.direction,
    required this.peerId,
    required this.peerName,
    this.peerAvatar,
    required this.startTime,
    this.sessionId,
    this.sdpOffer,
    this.sdpAnswer,
  });

  Map<String, dynamic> toJson() => {
        'callId': callId,
        'type': type.name,
        'direction': direction.name,
        'peerId': peerId,
        'peerName': peerName,
        'peerAvatar': peerAvatar,
        'startTime': startTime.toIso8601String(),
        'sessionId': sessionId,
        'sdpOffer': sdpOffer,
        'sdpAnswer': sdpAnswer,
      };

  factory CallSession.fromJson(Map<String, dynamic> json) => CallSession(
        callId: json['callId'],
        type: CallType.values.firstWhere((e) => e.name == json['type']),
        direction: CallDirection.values.firstWhere((e) => e.name == json['direction']),
        peerId: json['peerId'],
        peerName: json['peerName'],
        peerAvatar: json['peerAvatar'],
        startTime: DateTime.parse(json['startTime']),
        sessionId: json['sessionId'],
        sdpOffer: json['sdpOffer'],
        sdpAnswer: json['sdpAnswer'],
      );

  CallSession copyWith({
    String? callId,
    CallType? type,
    CallDirection? direction,
    String? peerId,
    String? peerName,
    String? peerAvatar,
    DateTime? startTime,
    String? sessionId,
    String? sdpOffer,
    String? sdpAnswer,
  }) {
    return CallSession(
      callId: callId ?? this.callId,
      type: type ?? this.type,
      direction: direction ?? this.direction,
      peerId: peerId ?? this.peerId,
      peerName: peerName ?? this.peerName,
      peerAvatar: peerAvatar ?? this.peerAvatar,
      startTime: startTime ?? this.startTime,
      sessionId: sessionId ?? this.sessionId,
      sdpOffer: sdpOffer ?? this.sdpOffer,
      sdpAnswer: sdpAnswer ?? this.sdpAnswer,
    );
  }

  bool get isVideo => type == CallType.video;
  bool get isAudio => type == CallType.audio;
  bool get isIncoming => direction == CallDirection.incoming;
  bool get isOutgoing => direction == CallDirection.outgoing;
}