def calculate_fan(hand, melds, is_self_draw, is_cleared, conditions):
    """
    根据规则动态计算番数。

    参数:
    - hand: 当前胡牌的手牌（长度为108的列表，表示每张牌的数量）。
    - melds: 碰杠等明牌列表。
    - is_self_draw: 是否自摸。
    - is_cleared: 是否清一色。
    - conditions: 其他胡牌条件的字典，例如 {'is_seven_pairs': True, 'add_self_draw': True}。

    返回:
    - fan: 总番数。
    """
    fan = 0  # 初始番数

    # 定义番种规则
    rules = {
        "is_pure_cleared": lambda: 3 if is_cleared and len(melds) == 3 and not conditions.get("is_double_pure_cleared",
                                                                                              False) else 0,
        "is_double_pure_cleared": lambda: 4 if is_cleared and len(melds) >= 2 and conditions.get(
            "is_double_pure_cleared", False) else 0,
        "is_cleared": lambda: 2 if is_cleared and not (conditions.get("is_pure_cleared", False) or
                                                       conditions.get("is_double_pure_cleared", False) or
                                                       conditions.get("is_clear_seven_pairs", False)) else 0,
        "is_seven_pairs": lambda: 2 if conditions.get("is_seven_pairs", False) and not conditions.get(
            "is_dragon_seven_pairs", False) else 0,
        "is_dragon_seven_pairs": lambda: 12 if conditions.get("is_dragon_seven_pairs", False) else 0,
        "is_clear_seven_pairs": lambda: 12 if conditions.get("is_clear_seven_pairs", False) else 0,
        "is_big_pairs": lambda: 2 if conditions.get("is_big_pairs", False) else 0,
        "is_small_pairs": lambda: 2 if conditions.get("is_small_pairs", False) else 0,
        "is_full_request": lambda: 6 if conditions.get("is_full_request", False) else 0,
        "is_gang_flower": lambda: 1 if conditions.get("is_gang_flower", False) else 0,
        "is_rob_gang": lambda: 1 if conditions.get("is_rob_gang", False) else 0,
        "is_under_the_sea": lambda: 1 if conditions.get("is_under_the_sea", False) else 0,
        "is_tian_hu": lambda: 12 if conditions.get("is_tian_hu", False) else 0,
        "is_di_hu": lambda: 12 if conditions.get("is_di_hu", False) else 0,
        "basic_win": lambda: 1 if not (conditions.get("is_seven_pairs", False) or
                                       conditions.get("is_big_pairs", False) or
                                       conditions.get("is_dragon_seven_pairs", False) or
                                       conditions.get("is_pure_cleared", False) or
                                       conditions.get("is_double_pure_cleared", False) or
                                       conditions.get("is_small_pairs", False) or
                                       conditions.get("is_clear_seven_pairs", False) or
                                       conditions.get("is_full_request", False) or
                                       conditions.get("is_rob_gang", False) or
                                       conditions.get("is_under_the_sea", False) or
                                       conditions.get("is_tian_hu", False) or
                                       conditions.get("is_di_hu", False)) else 0,

    }

    print("\nCalculating fan...")
    # 逐一应用规则
    for rule, func in rules.items():
        result = func()
        fan += result
        print(f"Rule: {rule}, Fan: {result}")  # 调试输出

    return fan


def is_seven_pairs(hand):
    """
    检查手牌是否是七对。
    """
    return sum(1 for count in hand if count == 2) == 7


def is_cleared(hand):
    """
    检查手牌是否是清一色。
    """
    suits = [tile // 36 for tile, count in enumerate(hand) if count > 0]
    return len(set(suits)) == 1


def is_big_pairs(hand):
    """
    检查手牌是否是大对子（由刻子和一对组成）。
    """
    from collections import Counter
    counter = Counter(hand)

    counts = [count for count in hand if count > 0]
    result = counts.count(2) == 1 and counts.count(3) >= 3
    print(f"Big pairs check: {result}, Counter: {Counter(counts)}")
    return result