feat: add core data model (Card, Deck, RuleConfig, Constants)

src/core/card.gd

@@ -0,0 +1,70 @@
+# src/core/card.gd
+# Pure data — no Godot dependencies
+
+class_name Card
+extends RefCounted
+
+const MIN_ID := 0
+const MAX_ID := 107
+
+var card_id: int
+var original_id: int
+var _suit: int
+var _rank: int
+
+static func create(original_id: int, suit: int, rank: int) -> Card:
+    var c := Card.new()
+    c.original_id = original_id
+    c._suit = suit
+    c._rank = rank
+    c.card_id = original_id
+    return c
+
+static func make_full_deck_ids() -> Array[int]:
+    var ids: Array[int] = []
+    for i in range(108):
+        ids.append(i)
+    return ids
+
+static func card_id_from_deck(original_id: int, deck_index: int) -> int:
+    return original_id + deck_index * 54
+
+func suit() -> int:
+    return _suit
+
+func rank() -> int:
+    return _rank
+
+func card_value() -> int:
+    return _suit * 20 + _rank
+
+func is_joker() -> bool:
+    return _rank == 15 or _rank == 16
+
+func is_heart() -> bool:
+    return _suit == 1
+
+func matches(other: Card) -> bool:
+    return card_value() == other.card_value()
+
+func equals(other: Card) -> bool:
+    return card_id == other.card_id
+
+func compare_to(other: Card) -> int:
+    var r := _rank - other._rank
+    if r != 0:
+        return r
+    return _suit - other._suit
+
+func to_packed() -> int:
+    return (_suit << 8) | (_rank & 0xFF)
+
+static func from_packed(packed: int) -> Card:
+    var suit := (packed >> 8) & 0xFF
+    var rank := packed & 0xFF
+    return Card.create(0, suit, rank)
+
+func _to_string() -> String:
+    var suits := ["S", "H", "C", "D", "SJ", "BJ"]
+    var ranks := ["", "", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K", "A", "SJ", "BJ"]
+    return "%s%s" % [suits[_suit], ranks[_rank]]

src/core/constants.gd

@@ -0,0 +1,77 @@
+# src/core/constants.gd
+# Zero Godot dependency — no class_name, use static functions to avoid global state.
+
+const RESULT_OK := 0
+const ERR_INVALID_CARDS := 1
+const ERR_NOT_YOUR_TURN := 2
+const ERR_CANNOT_PASS := 3
+const ERR_CARD_NOT_FOUND := 4
+const ERR_HAND_EMPTY := 5
+const ERR_INVALID_TRIBUTE := 6
+const ERR_GAME_OVER := 7
+const ERR_STATE_CONFLICT := 8
+
+const SUIT_SPADE := 0
+const SUIT_HEART := 1
+const SUIT_CLUB := 2
+const SUIT_DIAMOND := 3
+const SUIT_JOKER_SMALL := 4
+const SUIT_JOKER_BIG := 5
+
+const RANK_2 := 2
+const RANK_3 := 3
+const RANK_4 := 4
+const RANK_5 := 5
+const RANK_6 := 6
+const RANK_7 := 7
+const RANK_8 := 8
+const RANK_9 := 9
+const RANK_10 := 10
+const RANK_J := 11
+const RANK_Q := 12
+const RANK_K := 13
+const RANK_A := 14
+const RANK_SMALL_JOKER := 15
+const RANK_BIG_JOKER := 16
+
+const TYPE_SINGLE := 0
+const TYPE_PAIR := 1
+const TYPE_TRIPLE := 2
+const TYPE_TRIPLE_PLUS_TWO := 3
+const TYPE_STRAIGHT := 4
+const TYPE_CONSECUTIVE_PAIRS := 5
+const TYPE_STEEL_PLATE := 6
+const TYPE_STRAIGHT_FLUSH := 7
+const TYPE_BOMB := 8
+const TYPE_ROCKET := 9
+
+const TURN_PLAY := 0
+const TURN_PASS := 1
+const TURN_TRIBUTE_GIVE := 2
+const TURN_TRIBUTE_RETURN := 3
+
+const PHASE_INIT := 0
+const PHASE_DEAL := 1
+const PHASE_TRIBUTE := 2
+const PHASE_PLAY := 3
+const PHASE_LEVEL_UP := 4
+const PHASE_GAME_OVER := 5
+
+const WILD_SOURCE_GRADE := 0
+const WILD_SOURCE_SYSTEM := 1
+
+const MAX_AI_DECISION_MS := 3000
+const BEAM_WIDTH := 50
+const MAX_ENUM_NODES := 10000
+const TOTAL_CARDS := 108
+const CARDS_PER_PLAYER := 27
+const PLAYER_COUNT := 4
+
+static func make_result(ok: bool, error_code: int, data = null) -> Dictionary:
+    return {"ok": ok, "error_code": error_code, "data": data}
+
+static func success(data = null) -> Dictionary:
+    return {"ok": true, "error_code": RESULT_OK, "data": data}
+
+static func err(code: int) -> Dictionary:
+    return {"ok": false, "error_code": code, "data": null}

src/core/deck.gd

@@ -0,0 +1,58 @@
+# src/core/deck.gd
+class_name Deck
+extends RefCounted
+
+var _cards: Array[Card] = []
+
+static func _suit_for(original_id: int) -> int:
+    if original_id == 52:
+        return 4
+    if original_id == 53:
+        return 5
+    return original_id % 4
+
+static func _rank_for(original_id: int) -> int:
+    if original_id == 52:
+        return 15
+    if original_id == 53:
+        return 16
+    return 2 + (original_id / 4)
+
+static func create(seed: int = -1) -> Deck:
+    var d := Deck.new()
+    d._cards = []
+    for deck_idx in range(2):
+        for orig_id in range(54):
+            var global_id := Card.card_id_from_deck(orig_id, deck_idx)
+            var suit := _suit_for(orig_id)
+            var rank := _rank_for(orig_id)
+            var c := Card.create(orig_id, suit, rank)
+            c.card_id = global_id
+            d._cards.append(c)
+    if seed >= 0:
+        d._shuffle_with_seed(seed)
+    else:
+        d._shuffle_random()
+    return d
+
+func _shuffle_with_seed(seed: int) -> void:
+    var rng := RandomNumberGenerator.new()
+    rng.seed = seed
+    for i in range(_cards.size() - 1, 0, -1):
+        var j := rng.randi_range(0, i)
+        var tmp := _cards[i]
+        _cards[i] = _cards[j]
+        _cards[j] = tmp
+
+func _shuffle_random() -> void:
+    _shuffle_with_seed(Time.get_unix_time_from_system() as int)
+
+func deal(count: int) -> Array[Card]:
+    var result: Array[Card] = []
+    var actual := mini(count, _cards.size())
+    for _i in range(actual):
+        result.append(_cards.pop_back())
+    return result
+
+func remaining() -> int:
+    return _cards.size()

src/core/rule_config.gd

@@ -0,0 +1,40 @@
+# src/core/rule_config.gd
+class_name RuleConfig
+extends RefCounted
+
+const BOMB_BY_RANK := 0
+const BOMB_BY_COUNT := 1
+
+const TEAM_FIXED_1_3 := 0
+const TEAM_RANDOM := 1
+
+var same_suit_straight_beats_bomb: bool = true
+var double_down_levels: int = 3
+var can_tribute_wild: bool = false
+var tribute_return_max_rank: int = 10
+var straight_extends_to_ace: bool = true
+var bomb_compare_priority: int = BOMB_BY_RANK
+var wild_count: int = 2
+var team_formation: int = TEAM_FIXED_1_3
+
+static func standard() -> RuleConfig:
+    var c := RuleConfig.new()
+    return c
+
+static func huaian() -> RuleConfig:
+    var c := RuleConfig.new()
+    c.same_suit_straight_beats_bomb = false
+    c.straight_extends_to_ace = false
+    return c
+
+func to_hash_data() -> Dictionary:
+    return {
+        "same_suit_bomb": same_suit_straight_beats_bomb,
+        "double_down": double_down_levels,
+        "can_tribute_wild": can_tribute_wild,
+        "tribute_return_max": tribute_return_max_rank,
+        "straight_ace": straight_extends_to_ace,
+        "bomb_compare": bomb_compare_priority,
+        "wild_count": wild_count,
+        "team": team_formation
+    }