Smarter SwitchAI Mon Choices | HasBadOdds Switch Check (rh-hideout#3253)

* SwitchAI makes much smarter mon choices * Add HasHadOdds check to ShouldSwitch decision * Remove early return * Rework Baton Pass check as per discussion with Alex * Forgot to adjust a comment * Don't program before breakfast lol (if / else if fix) * Switch AI_CalcDamage for AI_DATA->simulatedDmg in HasBadOdds Thanks Alex! :D * Typo in a hitToKO comparison * Remove and replace AI_CalcPartyMonBestMoveDamage and IsAiPartyMonOHKOBy from rh-hideout#3146 See https://discord.com/channels/419213663107416084/1144447521960251472 for details * Major refactor, new struct, switchin considers damage / healing from hazards / status / held item / weather * Forgot Snow exists and heals Ice Body, haven't played Switch games lol * (rh-hideout@766a1a2) Compatibility, use new struct field instead of function call * Fixing oversight from previous upstream merge * Improve TSpikes handling to make GetSwitchinHazardDamage more applicable Small fixes: - EFFECT_EXPLOSION typo (!= to ==) - Order of if statements near bestResistEffective - Spacing of terms in big HasBadOdds if statements * Forgot to uncomment blocks disabled for debugging what turned out to be vanilla behaviour lol * Remove another holdover from debugging, sorry :/ * Lastly, undoing my debug trainer * Type matchup based on species type rather than current type Suggested by BLourenco on Discord, the idea is that a mon that's had its type affected by a move like Soak will still have moves as though it was its regular typing, and so prioritizing the temporary typing wouldn't be ideal. https://discord.com/channels/419213663107416084/1144447521960251472/1146644578141736970 * gActiveBattler upcoming merge fixes * Egg changes part 1 * Egg changes part 2, just need to address EWRAM still * Move SwitchinCandidate struct to AiLogicData * Consider Steel type when checking TSpikes * Comment about CanBePoisoned compatibility * Changes for Egg's 2nd review * Put period back in comment, whoops lol * Latest upcoming merge fixes * Missed a few u32 updates * Combine GetBestMonIntegrate functions / flags, some modularization * Fix merge error * Make modern fixes * Two tests done, two to go * Accidentally pushed reference test, removing it * Type matchup switching tests * Tests for defensive vs offense switches --------- Co-authored-by: DizzyEggg <jajkodizzy@wp.pl>
Kasenn · Dec 29, 2023 · f99fe0d · f99fe0d
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Showing 13 changed files with 1,527 additions and 117 deletions.
diff --git a/include/battle.h b/include/battle.h
@@ -281,6 +281,12 @@ struct AIPartyData // Opposing battlers - party mons.
     u8 count[NUM_BATTLE_SIDES];
 };
 
+struct SwitchinCandidate
+{
+    struct BattlePokemon battleMon;
+    bool8 hypotheticalStatus;
+};
+
 // Ai Data used when deciding which move to use, computed only once before each turn's start.
 struct AiLogicData
 {
@@ -300,6 +306,8 @@ struct AiLogicData
     bool8 shouldSwitchMon; // Because all available moves have no/little effect. Each bit per battler.
     u8 monToSwitchId[MAX_BATTLERS_COUNT]; // ID of the mon to switch.
     bool8 weatherHasEffect; // The same as WEATHER_HAS_EFFECT. Stored here, so it's called only once.
+    u8 mostSuitableMonId; // Stores result of GetMostSuitableMonToSwitchInto, which decides which generic mon the AI would switch into if they decide to switch. This can be overruled by specific mons found in ShouldSwitch; the final resulting mon is stored in AI_monToSwitchIntoId.
+    struct SwitchinCandidate switchinCandidate; // Struct used for deciding which mon to switch to in battle_ai_switch_items.c
 };
 
 struct AI_ThinkingStruct

diff --git a/include/battle_ai_switch_items.h b/include/battle_ai_switch_items.h
@@ -3,7 +3,7 @@
 
 void GetAIPartyIndexes(u32 battlerId, s32 *firstId, s32 *lastId);
 void AI_TrySwitchOrUseItem(u32 battler);
-u8 GetMostSuitableMonToSwitchInto(u32 battler);
+u8 GetMostSuitableMonToSwitchInto(u32 battler, bool32 switchAfterMonKOd);
 bool32 ShouldSwitch(u32 battler);
 
 #endif // GUARD_BATTLE_AI_SWITCH_ITEMS_H
diff --git a/include/battle_ai_util.h b/include/battle_ai_util.h
@@ -179,7 +179,6 @@ bool32 ShouldUseWishAromatherapy(u32 battlerAtk, u32 battlerDef, u32 move);
 // party logic
 struct BattlePokemon *AllocSaveBattleMons(void);
 void FreeRestoreBattleMons(struct BattlePokemon *savedBattleMons);
-s32 AI_CalcPartyMonBestMoveDamage(u32 battlerAtk, u32 battlerDef, struct Pokemon *attackerMon, struct Pokemon *targetMon);
 s32 CountUsablePartyMons(u32 battlerId);
 bool32 IsPartyFullyHealedExceptBattler(u32 battler);
 bool32 PartyHasMoveSplit(u32 battlerId, u32 split);
@@ -194,4 +193,6 @@ void IncreaseSleepScore(u32 battlerAtk, u32 battlerDef, u32 move, s32 *score);
 void IncreaseConfusionScore(u32 battlerAtk, u32 battlerDef, u32 move, s32 *score);
 void IncreaseFrostbiteScore(u32 battlerAtk, u32 battlerDef, u32 move, s32 *score);
 
+s32 AI_CalcPartyMonDamage(u32 move, u32 battlerAtk, u32 battlerDef, struct BattlePokemon switchinCandidate, bool8 isPartyMonAttacker);
+
 #endif //GUARD_BATTLE_AI_UTIL_H
diff --git a/include/constants/battle_ai.h b/include/constants/battle_ai.h
@@ -59,6 +59,7 @@
 #define AI_FLAG_SMART_SWITCHING       (1 << 15)  // AI includes a lot more switching checks
 #define AI_FLAG_ACE_POKEMON           (1 << 16)  // AI has an Ace Pokemon. The last Pokemon in the party will not be used until it's the last one remaining.
 #define AI_FLAG_OMNISCIENT            (1 << 17)  // AI has full knowledge of player moves, abilities, hold items
+#define AI_FLAG_SMART_MON_CHOICES     (1 << 18)  // AI will make smarter decisions when choosing which mon to send out mid-battle and after a KO, which are separate decisions. Pairs very well with AI_FLAG_SMART_SWITCHING.
 
 #define AI_FLAG_COUNT                       18
 

diff --git a/include/constants/items.h b/include/constants/items.h
@@ -607,6 +607,20 @@
 #define ITEM_UTILITY_UMBRELLA 513
 
 // Berries
+#if B_CONFUSE_BERRIES_HEAL >= GEN_8
+    #define CONFUSE_BERRY_HEAL_FRACTION 3
+#elif B_CONFUSE_BERRIES_HEAL == GEN_7
+    #define CONFUSE_BERRY_HEAL_FRACTION 2
+#else
+    #define CONFUSE_BERRY_HEAL_FRACTION 8
+#endif
+
+#if B_CONFUSE_BERRIES_HEAL >= GEN_7
+    #define CONFUSE_BERRY_HP_FRACTION 4
+#else
+    #define CONFUSE_BERRY_HP_FRACTION 2
+#endif
+
 #define ITEM_CHERI_BERRY 514
 #define ITEM_CHESTO_BERRY 515
 #define ITEM_PECHA_BERRY 516

diff --git a/src/battle_ai_main.c b/src/battle_ai_main.c
@@ -414,7 +414,7 @@ void SetAiLogicDataForTurn(struct AiLogicData *aiData)
 
 static bool32 AI_SwitchMonIfSuitable(u32 battler)
 {
-    u32 monToSwitchId = GetMostSuitableMonToSwitchInto(battler);
+    u32 monToSwitchId = AI_DATA->mostSuitableMonId;
     if (monToSwitchId != PARTY_SIZE)
     {
         AI_DATA->shouldSwitchMon |= gBitTable[battler];