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open Core
module StringMap = Map.Make (String)
type room_id = string [@@deriving yojson]
type waiting_player = {
id : string;
player_name : string;
join_time : float;
is_ai : bool;
}
[@@deriving yojson]
type waiting_room = {
room_id : room_id;
room_name : string;
host_id : string;
host_name : string;
players : waiting_player list;
created_at : float;
max_players : int;
}
[@@deriving yojson { exn = true }]
type game_room = {
room_id : room_id;
game_state : Game_state.t;
player_socket_ids : string list;
started : bool;
}
[@@deriving to_yojson]
type rooms_state = {
waiting_rooms : waiting_room StringMap.t;
active_rooms : game_room StringMap.t;
next_room_id : int;
}
type located_room =
| Game_room of room_id * game_room
| Waiting_room of room_id * waiting_room
| No_room
let find_index pred lst =
let rec aux idx = function
| [] -> None
| x :: xs -> if pred x then Some idx else aux (idx + 1) xs
in
aux 0 lst
let create_empty_rooms_state () =
{
waiting_rooms = StringMap.empty;
active_rooms = StringMap.empty;
next_room_id = 1;
}
let create_waiting_room state host_id host_name ?room_name () =
let room_id = Printf.sprintf "room-%d" state.next_room_id in
let now = Core_unix.gettimeofday () in
let player =
{ id = host_id; player_name = host_name; join_time = now; is_ai = false }
in
let room =
{
room_id;
room_name = Option.value room_name ~default:(host_name ^ "'s Game");
host_id;
host_name;
players = [ player ];
created_at = now;
max_players = 4;
}
in
let waiting_rooms = Map.set state.waiting_rooms ~key:room_id ~data:room in
({ state with waiting_rooms; next_room_id = state.next_room_id + 1 }, room)
let join_waiting_room state room_id player_id player_name =
match Map.find state.waiting_rooms room_id with
| None -> (false, None, None, Some "Room not found")
| Some room ->
if List.length room.players >= room.max_players then
(false, None, None, Some "Room is full")
else if List.exists room.players ~f:(fun p -> String.equal p.id player_id)
then (false, None, None, Some "Already in room")
else
let player =
{
id = player_id;
player_name;
join_time = Core_unix.gettimeofday ();
is_ai = false;
}
in
let updated_room = { room with players = room.players @ [ player ] } in
let waiting_rooms =
Map.set state.waiting_rooms ~key:room_id ~data:updated_room
in
let state = { state with waiting_rooms } in
(true, Some state, Some updated_room, None)
let add_ai_player state room_id difficulty =
match Map.find state.waiting_rooms room_id with
| None -> (false, None, None, Some "Room not found")
| Some room ->
if List.length room.players >= room.max_players then
(false, None, None, Some "Room is full")
else
let ai_count =
List.fold room.players ~init:0 ~f:(fun acc p ->
if p.is_ai then acc + 1 else acc)
in
let ai_id = Printf.sprintf "ai-%d" (ai_count + 1) in
let name =
"AI Bot ("
^ (match difficulty with
| Ai.Easy -> "Easy"
| Ai.Medium -> "Medium"
| Ai.Hard -> "Hard")
^ ")"
in
let ai =
{
id = ai_id;
player_name = name;
join_time = Core_unix.gettimeofday ();
is_ai = true;
}
in
let updated_room = { room with players = room.players @ [ ai ] } in
let waiting_rooms =
Map.set state.waiting_rooms ~key:room_id ~data:updated_room
in
let state = { state with waiting_rooms } in
(true, Some state, Some updated_room, None)
let start_game_from_waiting_room state room_id requesting_player_id =
match Map.find state.waiting_rooms room_id with
| None -> (false, None, None, Some "Waiting room not found")
| Some room ->
if not (String.equal room.host_id requesting_player_id) then
(false, None, None, Some "Only host can start game")
else if List.is_empty room.players then
(false, None, None, Some "Need at least 1 player to start")
else
let player_names = List.map room.players ~f:(fun p -> p.player_name) in
let game_state = Game_state.create_initial_game player_names in
let game_room =
{
room_id;
game_state;
player_socket_ids = List.map room.players ~f:(fun p -> p.id);
started = true;
}
in
let waiting_rooms = Map.remove state.waiting_rooms room_id in
let active_rooms =
Map.set state.active_rooms ~key:room_id ~data:game_room
in
let state = { state with waiting_rooms; active_rooms } in
(true, Some state, Some game_room, None)
let get_waiting_rooms state =
Map.to_alist state.waiting_rooms |> List.map ~f:snd
let get_waiting_room state room_id = Map.find state.waiting_rooms room_id
let get_game_room state room_id = Map.find state.active_rooms room_id
let update_game_state state room_id new_game_state =
match get_game_room state room_id with
| None -> state
| Some room ->
let updated = { room with game_state = new_game_state } in
{
state with
active_rooms = Map.set state.active_rooms ~key:room_id ~data:updated;
}
let leave_waiting_room state room_id player_id =
match get_waiting_room state room_id with
| None -> state
| Some room ->
let players =
List.filter room.players ~f:(fun p -> not (String.equal p.id player_id))
in
if List.is_empty players || String.equal room.host_id player_id then
{ state with waiting_rooms = Map.remove state.waiting_rooms room_id }
else
let updated_room = { room with players } in
{
state with
waiting_rooms =
Map.set state.waiting_rooms ~key:room_id ~data:updated_room;
}
let find_room_by_player_id state player_id =
let active =
Map.to_alist state.active_rooms
|> List.find_map ~f:(fun (id, room) ->
if List.exists room.player_socket_ids ~f:(String.equal player_id)
then Some (Game_room (id, room))
else None)
in
match active with
| Some room -> room
| None -> (
match
Map.to_alist state.waiting_rooms
|> List.find_map ~f:(fun (id, room) ->
if
List.exists room.players ~f:(fun p ->
String.equal p.id player_id)
then Some (Waiting_room (id, room))
else None)
with
| Some room -> room
| None -> No_room)
let replace_player_with_ai state room_id player_id difficulty =
match get_game_room state room_id with
| None -> (false, None, None, None, Some "Game room not found")
| Some room -> (
match
find_index (fun id -> String.equal id player_id) room.player_socket_ids
with
| None -> (false, None, None, None, Some "Player not found in room")
| Some idx ->
let ai_id =
Printf.sprintf "ai-%f-%d"
(Core_unix.gettimeofday ())
(Random.bits ())
in
let ai_name =
"AI Bot ("
^ (match difficulty with
| Ai.Easy -> "Easy"
| Ai.Medium -> "Medium"
| Ai.Hard -> "Hard")
^ ")"
in
let socket_ids =
List.mapi room.player_socket_ids ~f:(fun i id ->
if i = idx then ai_id else id)
in
let players =
List.mapi room.game_state.players ~f:(fun i p ->
if i = idx then Player.set_name p ai_name else p)
in
let game_state = { room.game_state with players } in
let updated_room =
{ room with player_socket_ids = socket_ids; game_state }
in
let active_rooms =
Map.set state.active_rooms ~key:room_id ~data:updated_room
in
let state = { state with active_rooms } in
let all_ai =
List.for_all socket_ids ~f:(fun id ->
String.length id >= 3 && String.(String.slice id 0 3 = "ai-"))
in
(true, Some state, Some updated_room, Some all_ai, None))
let remove_game_room state room_id =
{ state with active_rooms = Map.remove state.active_rooms room_id }