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171 lignes
5.1 KiB
171 lignes
5.1 KiB
-module(game_logic).
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-export([validate_play/2, calculate_card_value/1, evaluate_hand_strength/1,
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find_all_possible_patterns/1, analyze_card_pattern/1]).
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-define(CARD_VALUES, #{
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"3" => 3, "4" => 4, "5" => 5, "6" => 6, "7" => 7, "8" => 8, "9" => 9,
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"10" => 10, "J" => 11, "Q" => 12, "K" => 13, "A" => 14, "2" => 15,
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"小王" => 16, "大王" => 17
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}).
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%% 牌型定义
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-record(card_pattern, {
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type, % single | pair | triple | triple_with_one | straight |
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% straight_pair | airplane | airplane_with_wings | four_with_two | bomb | rocket
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value, % 主牌值
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length = 1, % 顺子长度
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extra = [] % 附加牌
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}).
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%% 验证出牌是否合法
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validate_play(Cards, LastPlay) ->
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case analyze_card_pattern(Cards) of
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{invalid, _} ->
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false;
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{Pattern, Value} ->
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case analyze_card_pattern(LastPlay) of
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{Pattern, LastValue} when Value > LastValue ->
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true;
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{_, _} ->
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check_special_cases(Pattern, Value, LastPlay);
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_ ->
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false
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end
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end.
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%% 分析牌型
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analyze_card_pattern(Cards) ->
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Grouped = group_cards(Cards),
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case identify_pattern(Grouped) of
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{Type, Value} when Type =/= invalid ->
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{#card_pattern{type = Type, value = Value}, Value};
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_ ->
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{invalid, 0}
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end.
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%% 计算手牌价值
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calculate_card_value(Cards) ->
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{Pattern, BaseValue} = analyze_card_pattern(Cards),
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case Pattern#card_pattern.type of
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bomb -> BaseValue * 2;
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rocket -> 1000;
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_ -> BaseValue
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end.
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%% 评估手牌强度
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evaluate_hand_strength(Cards) ->
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Patterns = find_all_possible_patterns(Cards),
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BaseScore = lists:foldl(
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fun(Pattern, Acc) ->
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Acc + calculate_pattern_value(Pattern)
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end,
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0,
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Patterns
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),
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adjust_score_by_combination(BaseScore, Cards).
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%% 找出所有可能的牌型组合
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find_all_possible_patterns(Cards) ->
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Grouped = group_cards(Cards),
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Singles = find_singles(Grouped),
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Pairs = find_pairs(Grouped),
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Triples = find_triples(Grouped),
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Straights = find_straights(Cards),
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StraightPairs = find_straight_pairs(Grouped),
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Airplanes = find_airplanes(Grouped),
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Bombs = find_bombs(Grouped),
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Rockets = find_rockets(Cards),
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Singles ++ Pairs ++ Triples ++ Straights ++ StraightPairs ++
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Airplanes ++ Bombs ++ Rockets.
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%% 内部辅助函数
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group_cards(Cards) ->
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lists:foldl(
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fun({_, Number}, Acc) ->
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maps:update_with(
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Number,
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fun(Count) -> Count + 1 end,
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1,
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Acc
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)
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end,
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#{},
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Cards
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).
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identify_pattern(Grouped) ->
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case maps:size(Grouped) of
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1 ->
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[{Number, Count}] = maps:to_list(Grouped),
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case Count of
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1 -> {single, maps:get(Number, ?CARD_VALUES)};
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2 -> {pair, maps:get(Number, ?CARD_VALUES)};
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3 -> {triple, maps:get(Number, ?CARD_VALUES)};
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4 -> {bomb, maps:get(Number, ?CARD_VALUES)};
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_ -> {invalid, 0}
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end;
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_ ->
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identify_complex_pattern(Grouped)
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end.
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identify_complex_pattern(Grouped) ->
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case find_straight_pattern(Grouped) of
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{ok, Pattern} -> Pattern;
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false ->
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case find_airplane_pattern(Grouped) of
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{ok, Pattern} -> Pattern;
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false ->
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case find_four_with_two(Grouped) of
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{ok, Pattern} -> Pattern;
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false -> {invalid, 0}
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end
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end
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end.
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find_straight_pattern(Grouped) ->
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Numbers = lists:sort(maps:keys(Grouped)),
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case is_consecutive(Numbers) of
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true when length(Numbers) >= 5 ->
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MaxValue = lists:max([maps:get(N, ?CARD_VALUES) || N <- Numbers]),
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{ok, {straight, MaxValue}};
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_ ->
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false
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end.
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is_consecutive(Numbers) ->
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case Numbers of
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[] -> true;
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[_] -> true;
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[First|Rest] ->
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lists:all(
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fun({A, B}) -> maps:get(B, ?CARD_VALUES) - maps:get(A, ?CARD_VALUES) =:= 1 end,
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lists:zip(Numbers, Rest)
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)
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end.
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calculate_pattern_value(Pattern) ->
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case Pattern of
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#card_pattern{type = single, value = V} -> V;
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#card_pattern{type = pair, value = V} -> V * 2;
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#card_pattern{type = triple, value = V} -> V * 3;
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#card_pattern{type = bomb, value = V} -> V * 4;
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#card_pattern{type = rocket} -> 1000;
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#card_pattern{type = straight, value = V, length = L} -> V * L;
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_ -> 0
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end.
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adjust_score_by_combination(BaseScore, Cards) ->
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CombinationBonus = case length(Cards) of
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N when N =< 5 -> BaseScore * 1.2;
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N when N =< 10 -> BaseScore * 1.1;
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_ -> BaseScore
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end,
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round(CombinationBonus).
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check_special_cases(Pattern, Value, LastPlay) ->
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case Pattern#card_pattern.type of
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bomb -> true;
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rocket -> true;
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_ -> false
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end.
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