// Instagram Direct Messages Protocol (Protobuf)
// Used for real-time message sync via MQTT

syntax = "proto3";

package ig.iris;

// DirectMessage - Single message in a thread
message DirectMessage {
  int64 message_id = 1;
  int64 user_id = 2;
  string content = 3;
  int64 timestamp = 4;
  
  // Message type: text, photo, video, etc.
  string type = 5;
  
  // Reactions: emoji -> count
  map<string, int32> reactions = 6;
  
  // Whether user has seen
  bool is_sent = 7;
  bool is_delivered = 8;
  bool is_read = 9;
}

// DirectThread - Conversation thread
message DirectThread {
  int64 thread_id = 1;
  repeated int64 participant_ids = 2;
  string thread_title = 3;
  int64 last_message_ts = 4;
  
  // Admin user ID
  int64 admin_user_id = 5;
  
  // Is group thread
  bool is_group = 6;
  
  // Is archived
  bool is_archived = 7;
}

// TypingIndicator - User typing signal
message TypingIndicator {
  int64 thread_id = 1;
  int64 from_user_id = 2;
  int64 timestamp = 3;
  
  // 0 = typing, 1 = stopped
  int32 state = 4;
}

// PresenceStatus - User online/offline
message PresenceStatus {
  int64 user_id = 1;
  
  // 0 = offline, 1 = active, 2 = idle
  int32 status = 2;
  
  int64 timestamp = 3;
  int64 last_active = 4;
}

// DeltaMessage - Incremental sync update
message DeltaMessage {
  int64 sequence_id = 1;
  string operation = 2; // add, update, delete
  
  oneof data {
    DirectMessage message = 3;
    DirectThread thread = 4;
    TypingIndicator typing = 5;
    PresenceStatus presence = 6;
  }
}

// Acknowledgment - Server expects ACK for delivery
message Acknowledgment {
  int64 message_id = 1;
  int64 thread_id = 2;
  int64 timestamp = 3;
}