export const GENERAL_CHANNEL_ID = "00000000-0000-0000-0000-000000000010";

export type ClientMessage =
  | { type: "login"; username: string; password: string; identity_pubkey: string }
  | { type: "register"; username: string; password: string; identity_pubkey: string }
  | { type: "resume_session"; token: string }
  | { type: "logout" }
  | { type: "send_channel_message"; channel_id: string; content: string }
  | { type: "fetch_channel_history"; channel_id: string; before_message_id: string | null; limit: number }
  | { type: "init_dm_key_exchange"; recipient_id: string; sender_ephemeral_pubkey: string }
  | { type: "accept_dm_key_exchange"; initiator_id: string; recipient_ephemeral_pubkey: string }
  | { type: "send_dm"; recipient_id: string; ciphertext: string; nonce: string }
  | { type: "fetch_dm_history"; peer_id: string; before_message_id: string | null; limit: number }
  | { type: "ping" };

export type ServerMessage =
  | { type: "auth_success"; user_id: string; username: string; session_token: string }
  | { type: "auth_error"; reason: string }
  | {
      type: "channel_message";
      message_id: string;
      channel_id: string;
      author_id: string;
      author_username: string;
      content: string;
      timestamp: string;
    }
  | {
      type: "channel_history";
      channel_id: string;
      messages: Array<{
        message_id: string;
        author_id: string;
        author_username: string;
        content: string;
        timestamp: string;
      }>;
    }
  | {
      type: "dm_key_exchange_request";
      initiator_id: string;
      initiator_username: string;
      sender_ephemeral_pubkey: string;
    }
  | {
      type: "dm_key_exchange_response";
      recipient_id: string;
      recipient_username: string;
      recipient_ephemeral_pubkey: string;
    }
  | {
      type: "direct_message";
      message_id: string;
      sender_id: string;
      sender_username: string;
      ciphertext: string;
      nonce: string;
      timestamp: string;
    }
  | {
      type: "dm_history";
      peer_id: string;
      messages: Array<{
        message_id: string;
        sender_id: string;
        ciphertext: string;
        nonce: string;
        timestamp: string;
      }>;
    }
  | { type: "error"; code: number; message: string }
  | { type: "pong" };