Start repo, claude & kimi still vibing tho

lib/odinsea/channel/server.ex

@@ -0,0 +1,73 @@
+defmodule Odinsea.Channel.Server do
+  @moduledoc """
+  A single game channel server.
+  """
+
+  use GenServer
+
+  require Logger
+
+  defstruct [:channel_id, :socket, :port, :clients]
+
+  def start_link(channel_id) do
+    GenServer.start_link(__MODULE__, channel_id, name: via_tuple(channel_id))
+  end
+
+  def via_tuple(channel_id) do
+    {:via, Registry, {Odinsea.Channel.Registry, channel_id}}
+  end
+
+  @impl true
+  def init(channel_id) do
+    ports = Application.get_env(:odinsea, :game, [])[:channel_ports] || %{}
+    port = Map.get(ports, channel_id, 8584 + channel_id)
+
+    case :gen_tcp.listen(port, tcp_options()) do
+      {:ok, socket} ->
+        Logger.info("Channel #{channel_id} listening on port #{port}")
+        send(self(), :accept)
+
+        {:ok,
+         %__MODULE__{
+           channel_id: channel_id,
+           socket: socket,
+           port: port,
+           clients: %{}
+         }}
+
+      {:error, reason} ->
+        Logger.error("Failed to start channel #{channel_id} on port #{port}: #{inspect(reason)}")
+        {:stop, reason}
+    end
+  end
+
+  @impl true
+  def handle_info(:accept, %{socket: socket, channel_id: channel_id} = state) do
+    case :gen_tcp.accept(socket) do
+      {:ok, client_socket} ->
+        {:ok, _pid} =
+          DynamicSupervisor.start_child(
+            Odinsea.ClientSupervisor,
+            {Odinsea.Channel.Client, {client_socket, channel_id}}
+          )
+
+        send(self(), :accept)
+        {:noreply, state}
+
+      {:error, reason} ->
+        Logger.warning("Channel #{channel_id} accept error: #{inspect(reason)}")
+        send(self(), :accept)
+        {:noreply, state}
+    end
+  end
+
+  defp tcp_options do
+    [
+      :binary,
+      packet: :raw,
+      active: false,
+      reuseaddr: true,
+      backlog: 100
+    ]
+  end
+end