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battle_ai_switch_items.c
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#include "global.h"
#include "battle.h"
#include "battle_anim.h"
#include "battle_controllers.h"
#include "battle_main.h"
#include "data.h"
#include "pokemon.h"
#include "random.h"
#include "util.h"
#include "constants/abilities.h"
#include "constants/item_effects.h"
#include "constants/items.h"
#include "constants/moves.h"
// this file's functions
static bool8 HasSuperEffectiveMoveAgainstOpponents(bool8 noRng);
static bool8 FindMonWithFlagsAndSuperEffective(u8 flags, u8 moduloPercent);
static bool8 ShouldUseItem(void);
static bool8 ShouldSwitchIfPerishSong(void)
{
if (gStatuses3[gActiveBattler] & STATUS3_PERISH_SONG
&& gDisableStructs[gActiveBattler].perishSongTimer == 0)
{
*(gBattleStruct->AI_monToSwitchIntoId + gActiveBattler) = PARTY_SIZE;
BtlController_EmitTwoReturnValues(BUFFER_B, B_ACTION_SWITCH, 0);
return TRUE;
}
else
{
return FALSE;
}
}
static bool8 ShouldSwitchIfWonderGuard(void)
{
u8 opposingPosition;
u8 opposingBattler;
u8 moveFlags;
s32 i, j;
s32 firstId;
s32 lastId; // + 1
struct Pokemon *party = NULL;
u16 move;
if (gBattleTypeFlags & BATTLE_TYPE_DOUBLE)
return FALSE;
opposingPosition = BATTLE_OPPOSITE(GetBattlerPosition(gActiveBattler));
if (gBattleMons[GetBattlerAtPosition(opposingPosition)].ability != ABILITY_WONDER_GUARD)
return FALSE;
// Check if Pokémon has a super effective move.
for (opposingBattler = GetBattlerAtPosition(opposingPosition), i = 0; i < MAX_MON_MOVES; i++)
{
move = gBattleMons[gActiveBattler].moves[i];
if (move == MOVE_NONE)
continue;
moveFlags = AI_TypeCalc(move, gBattleMons[opposingBattler].species, gBattleMons[opposingBattler].ability);
if (moveFlags & MOVE_RESULT_SUPER_EFFECTIVE)
return FALSE;
}
// Get party information.
if (gBattleTypeFlags & (BATTLE_TYPE_TWO_OPPONENTS | BATTLE_TYPE_TOWER_LINK_MULTI))
{
if ((gActiveBattler & BIT_FLANK) == B_FLANK_LEFT)
firstId = 0, lastId = PARTY_SIZE / 2;
else
firstId = PARTY_SIZE / 2, lastId = PARTY_SIZE;
}
else
{
firstId = 0, lastId = PARTY_SIZE;
}
if (GetBattlerSide(gActiveBattler) == B_SIDE_PLAYER)
party = gPlayerParty;
else
party = gEnemyParty;
// Find a Pokémon in the party that has a super effective move.
for (i = firstId; i < lastId; i++)
{
if (GetMonData(&party[i], MON_DATA_HP) == 0)
continue;
if (GetMonData(&party[i], MON_DATA_SPECIES_OR_EGG) == SPECIES_NONE)
continue;
if (GetMonData(&party[i], MON_DATA_SPECIES_OR_EGG) == SPECIES_EGG)
continue;
if (i == gBattlerPartyIndexes[gActiveBattler])
continue;
GetMonData(&party[i], MON_DATA_SPECIES); // Unused return value.
GetMonData(&party[i], MON_DATA_ABILITY_NUM); // Unused return value.
for (opposingBattler = GetBattlerAtPosition(opposingPosition), j = 0; j < MAX_MON_MOVES; j++)
{
move = GetMonData(&party[i], MON_DATA_MOVE1 + j);
if (move == MOVE_NONE)
continue;
moveFlags = AI_TypeCalc(move, gBattleMons[opposingBattler].species, gBattleMons[opposingBattler].ability);
if (moveFlags & MOVE_RESULT_SUPER_EFFECTIVE && Random() % 3 < 2)
{
// We found a mon.
*(gBattleStruct->AI_monToSwitchIntoId + gActiveBattler) = i;
BtlController_EmitTwoReturnValues(BUFFER_B, B_ACTION_SWITCH, 0);
return TRUE;
}
}
}
return FALSE; // There is not a single Pokémon in the party that has a super effective move against a mon with Wonder Guard.
}
static bool8 FindMonThatAbsorbsOpponentsMove(void)
{
u8 battlerIn1, battlerIn2;
u8 absorbingTypeAbility;
s32 firstId;
s32 lastId; // + 1
struct Pokemon *party;
s32 i;
if (HasSuperEffectiveMoveAgainstOpponents(TRUE) && Random() % 3 != 0)
return FALSE;
if (gLastLandedMoves[gActiveBattler] == MOVE_NONE)
return FALSE;
if (gLastLandedMoves[gActiveBattler] == MOVE_UNAVAILABLE)
return FALSE;
if (gBattleMoves[gLastLandedMoves[gActiveBattler]].power == 0)
return FALSE;
if (gBattleTypeFlags & BATTLE_TYPE_DOUBLE)
{
battlerIn1 = gActiveBattler;
if (gAbsentBattlerFlags & gBitTable[GetBattlerAtPosition(BATTLE_PARTNER(GetBattlerPosition(gActiveBattler)))])
battlerIn2 = gActiveBattler;
else
battlerIn2 = GetBattlerAtPosition(BATTLE_PARTNER(GetBattlerPosition(gActiveBattler)));
}
else
{
battlerIn1 = gActiveBattler;
battlerIn2 = gActiveBattler;
}
if (gBattleMoves[gLastLandedMoves[gActiveBattler]].type == TYPE_FIRE)
absorbingTypeAbility = ABILITY_FLASH_FIRE;
else if (gBattleMoves[gLastLandedMoves[gActiveBattler]].type == TYPE_WATER)
absorbingTypeAbility = ABILITY_WATER_ABSORB;
else if (gBattleMoves[gLastLandedMoves[gActiveBattler]].type == TYPE_ELECTRIC)
absorbingTypeAbility = ABILITY_VOLT_ABSORB;
else
return FALSE;
if (gBattleMons[gActiveBattler].ability == absorbingTypeAbility)
return FALSE;
if (gBattleTypeFlags & (BATTLE_TYPE_TWO_OPPONENTS | BATTLE_TYPE_TOWER_LINK_MULTI))
{
if ((gActiveBattler & BIT_FLANK) == B_FLANK_LEFT)
firstId = 0, lastId = PARTY_SIZE / 2;
else
firstId = PARTY_SIZE / 2, lastId = PARTY_SIZE;
}
else
{
firstId = 0, lastId = PARTY_SIZE;
}
if (GetBattlerSide(gActiveBattler) == B_SIDE_PLAYER)
party = gPlayerParty;
else
party = gEnemyParty;
for (i = firstId; i < lastId; i++)
{
u16 species;
u8 monAbility;
if (GetMonData(&party[i], MON_DATA_HP) == 0)
continue;
if (GetMonData(&party[i], MON_DATA_SPECIES_OR_EGG) == SPECIES_NONE)
continue;
if (GetMonData(&party[i], MON_DATA_SPECIES_OR_EGG) == SPECIES_EGG)
continue;
if (i == gBattlerPartyIndexes[battlerIn1])
continue;
if (i == gBattlerPartyIndexes[battlerIn2])
continue;
if (i == *(gBattleStruct->monToSwitchIntoId + battlerIn1))
continue;
if (i == *(gBattleStruct->monToSwitchIntoId + battlerIn2))
continue;
species = GetMonData(&party[i], MON_DATA_SPECIES);
if (GetMonData(&party[i], MON_DATA_ABILITY_NUM) != 0)
monAbility = gSpeciesInfo[species].abilities[1];
else
monAbility = gSpeciesInfo[species].abilities[0];
if (absorbingTypeAbility == monAbility && Random() & 1)
{
// we found a mon.
*(gBattleStruct->AI_monToSwitchIntoId + gActiveBattler) = i;
BtlController_EmitTwoReturnValues(BUFFER_B, B_ACTION_SWITCH, 0);
return TRUE;
}
}
return FALSE;
}
static bool8 ShouldSwitchIfNaturalCure(void)
{
if (!(gBattleMons[gActiveBattler].status1 & STATUS1_SLEEP))
return FALSE;
if (gBattleMons[gActiveBattler].ability != ABILITY_NATURAL_CURE)
return FALSE;
if (gBattleMons[gActiveBattler].hp < gBattleMons[gActiveBattler].maxHP / 2)
return FALSE;
if ((gLastLandedMoves[gActiveBattler] == MOVE_NONE
|| gLastLandedMoves[gActiveBattler] == MOVE_UNAVAILABLE)
&& Random() & 1)
{
*(gBattleStruct->AI_monToSwitchIntoId + gActiveBattler) = PARTY_SIZE;
BtlController_EmitTwoReturnValues(BUFFER_B, B_ACTION_SWITCH, 0);
return TRUE;
}
else if (gBattleMoves[gLastLandedMoves[gActiveBattler]].power == 0
&& Random() & 1)
{
*(gBattleStruct->AI_monToSwitchIntoId + gActiveBattler) = PARTY_SIZE;
BtlController_EmitTwoReturnValues(BUFFER_B, B_ACTION_SWITCH, 0);
return TRUE;
}
if (FindMonWithFlagsAndSuperEffective(MOVE_RESULT_DOESNT_AFFECT_FOE, 1))
return TRUE;
if (FindMonWithFlagsAndSuperEffective(MOVE_RESULT_NOT_VERY_EFFECTIVE, 1))
return TRUE;
if (Random() & 1)
{
*(gBattleStruct->AI_monToSwitchIntoId + gActiveBattler) = PARTY_SIZE;
BtlController_EmitTwoReturnValues(BUFFER_B, B_ACTION_SWITCH, 0);
return TRUE;
}
return FALSE;
}
static bool8 HasSuperEffectiveMoveAgainstOpponents(bool8 noRng)
{
u8 opposingPosition;
u8 opposingBattler;
s32 i;
u8 moveFlags;
u16 move;
opposingPosition = BATTLE_OPPOSITE(GetBattlerPosition(gActiveBattler));
opposingBattler = GetBattlerAtPosition(opposingPosition);
if (!(gAbsentBattlerFlags & gBitTable[opposingBattler]))
{
for (i = 0; i < MAX_MON_MOVES; i++)
{
move = gBattleMons[gActiveBattler].moves[i];
if (move == MOVE_NONE)
continue;
moveFlags = AI_TypeCalc(move, gBattleMons[opposingBattler].species, gBattleMons[opposingBattler].ability);
if (moveFlags & MOVE_RESULT_SUPER_EFFECTIVE)
{
if (noRng)
return TRUE;
if (Random() % 10 != 0)
return TRUE;
}
}
}
if (!(gBattleTypeFlags & BATTLE_TYPE_DOUBLE))
return FALSE;
opposingBattler = GetBattlerAtPosition(BATTLE_PARTNER(opposingPosition));
if (!(gAbsentBattlerFlags & gBitTable[opposingBattler]))
{
for (i = 0; i < MAX_MON_MOVES; i++)
{
move = gBattleMons[gActiveBattler].moves[i];
if (move == MOVE_NONE)
continue;
moveFlags = AI_TypeCalc(move, gBattleMons[opposingBattler].species, gBattleMons[opposingBattler].ability);
if (moveFlags & MOVE_RESULT_SUPER_EFFECTIVE)
{
if (noRng)
return TRUE;
if (Random() % 10 != 0)
return TRUE;
}
}
}
return FALSE;
}
static bool8 AreStatsRaised(void)
{
u8 buffedStatsValue = 0;
s32 i;
for (i = 0; i < NUM_BATTLE_STATS; i++)
{
if (gBattleMons[gActiveBattler].statStages[i] > DEFAULT_STAT_STAGE)
buffedStatsValue += gBattleMons[gActiveBattler].statStages[i] - DEFAULT_STAT_STAGE;
}
return (buffedStatsValue > 3);
}
static bool8 FindMonWithFlagsAndSuperEffective(u8 flags, u8 moduloPercent)
{
u8 battlerIn1, battlerIn2;
s32 firstId;
s32 lastId; // + 1
struct Pokemon *party;
s32 i, j;
u16 move;
u8 moveFlags;
if (gLastLandedMoves[gActiveBattler] == MOVE_NONE)
return FALSE;
if (gLastLandedMoves[gActiveBattler] == MOVE_UNAVAILABLE)
return FALSE;
if (gLastHitBy[gActiveBattler] == 0xFF)
return FALSE;
if (gBattleMoves[gLastLandedMoves[gActiveBattler]].power == 0)
return FALSE;
if (gBattleTypeFlags & BATTLE_TYPE_DOUBLE)
{
battlerIn1 = gActiveBattler;
if (gAbsentBattlerFlags & gBitTable[GetBattlerAtPosition(BATTLE_PARTNER(GetBattlerPosition(gActiveBattler)))])
battlerIn2 = gActiveBattler;
else
battlerIn2 = GetBattlerAtPosition(BATTLE_PARTNER(GetBattlerPosition(gActiveBattler)));
}
else
{
battlerIn1 = gActiveBattler;
battlerIn2 = gActiveBattler;
}
if (gBattleTypeFlags & (BATTLE_TYPE_TWO_OPPONENTS | BATTLE_TYPE_TOWER_LINK_MULTI))
{
if ((gActiveBattler & BIT_FLANK) == 0)
firstId = 0, lastId = PARTY_SIZE / 2;
else
firstId = PARTY_SIZE / 2, lastId = PARTY_SIZE;
}
else
{
firstId = 0, lastId = PARTY_SIZE;
}
if (GetBattlerSide(gActiveBattler) == B_SIDE_PLAYER)
party = gPlayerParty;
else
party = gEnemyParty;
for (i = firstId; i < lastId; i++)
{
u16 species;
u8 monAbility;
if (GetMonData(&party[i], MON_DATA_HP) == 0)
continue;
if (GetMonData(&party[i], MON_DATA_SPECIES_OR_EGG) == SPECIES_NONE)
continue;
if (GetMonData(&party[i], MON_DATA_SPECIES_OR_EGG) == SPECIES_EGG)
continue;
if (i == gBattlerPartyIndexes[battlerIn1])
continue;
if (i == gBattlerPartyIndexes[battlerIn2])
continue;
if (i == *(gBattleStruct->monToSwitchIntoId + battlerIn1))
continue;
if (i == *(gBattleStruct->monToSwitchIntoId + battlerIn2))
continue;
species = GetMonData(&party[i], MON_DATA_SPECIES);
if (GetMonData(&party[i], MON_DATA_ABILITY_NUM) != 0)
monAbility = gSpeciesInfo[species].abilities[1];
else
monAbility = gSpeciesInfo[species].abilities[0];
moveFlags = AI_TypeCalc(gLastLandedMoves[gActiveBattler], species, monAbility);
if (moveFlags & flags)
{
battlerIn1 = gLastHitBy[gActiveBattler];
for (j = 0; j < MAX_MON_MOVES; j++)
{
move = GetMonData(&party[i], MON_DATA_MOVE1 + j);
if (move == 0)
continue;
moveFlags = AI_TypeCalc(move, gBattleMons[battlerIn1].species, gBattleMons[battlerIn1].ability);
if (moveFlags & MOVE_RESULT_SUPER_EFFECTIVE && Random() % moduloPercent == 0)
{
*(gBattleStruct->AI_monToSwitchIntoId + gActiveBattler) = i;
BtlController_EmitTwoReturnValues(BUFFER_B, B_ACTION_SWITCH, 0);
return TRUE;
}
}
}
}
return FALSE;
}
static bool8 ShouldSwitch(void)
{
u8 battlerIn1, battlerIn2;
u8 *activeBattlerPtr; // Needed to match.
s32 firstId;
s32 lastId; // + 1
struct Pokemon *party;
s32 i;
s32 availableToSwitch;
if (gBattleMons[*(activeBattlerPtr = &gActiveBattler)].status2 & (STATUS2_WRAPPED | STATUS2_ESCAPE_PREVENTION))
return FALSE;
if (gStatuses3[gActiveBattler] & STATUS3_ROOTED)
return FALSE;
if (ABILITY_ON_OPPOSING_FIELD(gActiveBattler, ABILITY_SHADOW_TAG))
return FALSE;
if (ABILITY_ON_OPPOSING_FIELD(gActiveBattler, ABILITY_ARENA_TRAP)) // Misses the flying type and Levitate check.
return FALSE;
if (ABILITY_ON_FIELD2(ABILITY_MAGNET_PULL))
{
if (IS_BATTLER_OF_TYPE(gActiveBattler, TYPE_STEEL))
return FALSE;
}
if (gBattleTypeFlags & BATTLE_TYPE_ARENA)
return FALSE;
availableToSwitch = 0;
if (gBattleTypeFlags & BATTLE_TYPE_DOUBLE)
{
battlerIn1 = *activeBattlerPtr;
if (gAbsentBattlerFlags & gBitTable[GetBattlerAtPosition(BATTLE_PARTNER(GetBattlerPosition(*activeBattlerPtr)))])
battlerIn2 = *activeBattlerPtr;
else
battlerIn2 = GetBattlerAtPosition(BATTLE_PARTNER(GetBattlerPosition(*activeBattlerPtr)));
}
else
{
battlerIn1 = *activeBattlerPtr;
battlerIn2 = *activeBattlerPtr;
}
if (gBattleTypeFlags & (BATTLE_TYPE_TWO_OPPONENTS | BATTLE_TYPE_TOWER_LINK_MULTI))
{
if ((gActiveBattler & BIT_FLANK) == B_FLANK_LEFT)
firstId = 0, lastId = PARTY_SIZE / 2;
else
firstId = PARTY_SIZE / 2, lastId = PARTY_SIZE;
}
else
{
firstId = 0, lastId = PARTY_SIZE;
}
if (GetBattlerSide(gActiveBattler) == B_SIDE_PLAYER)
party = gPlayerParty;
else
party = gEnemyParty;
for (i = firstId; i < lastId; i++)
{
if (GetMonData(&party[i], MON_DATA_HP) == 0)
continue;
if (GetMonData(&party[i], MON_DATA_SPECIES_OR_EGG) == SPECIES_NONE)
continue;
if (GetMonData(&party[i], MON_DATA_SPECIES_OR_EGG) == SPECIES_EGG)
continue;
if (i == gBattlerPartyIndexes[battlerIn1])
continue;
if (i == gBattlerPartyIndexes[battlerIn2])
continue;
if (i == *(gBattleStruct->monToSwitchIntoId + battlerIn1))
continue;
if (i == *(gBattleStruct->monToSwitchIntoId + battlerIn2))
continue;
availableToSwitch++;
}
if (availableToSwitch == 0)
return FALSE;
if (ShouldSwitchIfPerishSong())
return TRUE;
if (ShouldSwitchIfWonderGuard())
return TRUE;
if (FindMonThatAbsorbsOpponentsMove())
return TRUE;
if (ShouldSwitchIfNaturalCure())
return TRUE;
if (HasSuperEffectiveMoveAgainstOpponents(FALSE))
return FALSE;
if (AreStatsRaised())
return FALSE;
if (FindMonWithFlagsAndSuperEffective(MOVE_RESULT_DOESNT_AFFECT_FOE, 2)
|| FindMonWithFlagsAndSuperEffective(MOVE_RESULT_NOT_VERY_EFFECTIVE, 3))
return TRUE;
return FALSE;
}
void AI_TrySwitchOrUseItem(void)
{
struct Pokemon *party;
u8 battlerIn1, battlerIn2;
s32 firstId;
s32 lastId; // + 1
u8 battlerIdentity = GetBattlerPosition(gActiveBattler);
if (GetBattlerSide(gActiveBattler) == B_SIDE_PLAYER)
party = gPlayerParty;
else
party = gEnemyParty;
if (gBattleTypeFlags & BATTLE_TYPE_TRAINER)
{
if (ShouldSwitch())
{
if (*(gBattleStruct->AI_monToSwitchIntoId + gActiveBattler) == PARTY_SIZE)
{
s32 monToSwitchId = GetMostSuitableMonToSwitchInto();
if (monToSwitchId == PARTY_SIZE)
{
if (!(gBattleTypeFlags & BATTLE_TYPE_DOUBLE))
{
battlerIn1 = GetBattlerAtPosition(battlerIdentity);
battlerIn2 = battlerIn1;
}
else
{
battlerIn1 = GetBattlerAtPosition(battlerIdentity);
battlerIn2 = GetBattlerAtPosition(BATTLE_PARTNER(battlerIdentity));
}
if (gBattleTypeFlags & (BATTLE_TYPE_TWO_OPPONENTS | BATTLE_TYPE_TOWER_LINK_MULTI))
{
if ((gActiveBattler & BIT_FLANK) == B_FLANK_LEFT)
firstId = 0, lastId = PARTY_SIZE / 2;
else
firstId = PARTY_SIZE / 2, lastId = PARTY_SIZE;
}
else
{
firstId = 0, lastId = PARTY_SIZE;
}
for (monToSwitchId = firstId; monToSwitchId < lastId; monToSwitchId++)
{
if (GetMonData(&party[monToSwitchId], MON_DATA_HP) == 0)
continue;
if (monToSwitchId == gBattlerPartyIndexes[battlerIn1])
continue;
if (monToSwitchId == gBattlerPartyIndexes[battlerIn2])
continue;
if (monToSwitchId == *(gBattleStruct->monToSwitchIntoId + battlerIn1))
continue;
if (monToSwitchId == *(gBattleStruct->monToSwitchIntoId + battlerIn2))
continue;
break;
}
}
*(gBattleStruct->AI_monToSwitchIntoId + gActiveBattler) = monToSwitchId;
}
*(gBattleStruct->monToSwitchIntoId + gActiveBattler) = *(gBattleStruct->AI_monToSwitchIntoId + gActiveBattler);
return;
}
else if (ShouldUseItem())
{
return;
}
}
BtlController_EmitTwoReturnValues(BUFFER_B, B_ACTION_USE_MOVE, BATTLE_OPPOSITE(gActiveBattler) << 8);
}
static void ModulateByTypeEffectiveness(u8 atkType, u8 defType1, u8 defType2, u8 *var)
{
s32 i = 0;
while (TYPE_EFFECT_ATK_TYPE(i) != TYPE_ENDTABLE)
{
if (TYPE_EFFECT_ATK_TYPE(i) == TYPE_FORESIGHT)
{
i += 3;
continue;
}
else if (TYPE_EFFECT_ATK_TYPE(i) == atkType)
{
// Check type1.
if (TYPE_EFFECT_DEF_TYPE(i) == defType1)
*var = (*var * TYPE_EFFECT_MULTIPLIER(i)) / TYPE_MUL_NORMAL;
// Check type2.
if (TYPE_EFFECT_DEF_TYPE(i) == defType2 && defType1 != defType2)
*var = (*var * TYPE_EFFECT_MULTIPLIER(i)) / TYPE_MUL_NORMAL;
}
i += 3;
}
}
u8 GetMostSuitableMonToSwitchInto(void)
{
u8 opposingBattler;
#ifdef BUGFIX
s32 bestDmg;
#else
u8 bestDmg; // Note: should be changed to s32 since it is also used for the actual damage done later
#endif
u8 bestMonId;
u8 battlerIn1, battlerIn2;
s32 firstId;
s32 lastId; // + 1
struct Pokemon *party;
s32 i, j;
u8 invalidMons;
u16 move;
if (*(gBattleStruct->monToSwitchIntoId + gActiveBattler) != PARTY_SIZE)
return *(gBattleStruct->monToSwitchIntoId + gActiveBattler);
if (gBattleTypeFlags & BATTLE_TYPE_ARENA)
return gBattlerPartyIndexes[gActiveBattler] + 1;
if (gBattleTypeFlags & BATTLE_TYPE_DOUBLE)
{
battlerIn1 = gActiveBattler;
if (gAbsentBattlerFlags & gBitTable[GetBattlerAtPosition(BATTLE_PARTNER(GetBattlerPosition(gActiveBattler)))])
battlerIn2 = gActiveBattler;
else
battlerIn2 = GetBattlerAtPosition(BATTLE_PARTNER(GetBattlerPosition(gActiveBattler)));
// UB: It considers the opponent only player's side even though it can battle alongside player.
opposingBattler = Random() & BIT_FLANK;
if (gAbsentBattlerFlags & gBitTable[opposingBattler])
opposingBattler ^= BIT_FLANK;
}
else
{
opposingBattler = GetBattlerAtPosition(BATTLE_OPPOSITE(GetBattlerPosition(gActiveBattler)));
battlerIn1 = gActiveBattler;
battlerIn2 = gActiveBattler;
}
if (gBattleTypeFlags & (BATTLE_TYPE_TWO_OPPONENTS | BATTLE_TYPE_TOWER_LINK_MULTI))
{
if ((gActiveBattler & BIT_FLANK) == B_FLANK_LEFT)
firstId = 0, lastId = PARTY_SIZE / 2;
else
firstId = PARTY_SIZE / 2, lastId = PARTY_SIZE;
}
else
{
firstId = 0, lastId = PARTY_SIZE;
}
if (GetBattlerSide(gActiveBattler) == B_SIDE_PLAYER)
party = gPlayerParty;
else
party = gEnemyParty;
invalidMons = 0;
while (invalidMons != (1 << PARTY_SIZE) - 1) // All mons are invalid.
{
bestDmg = TYPE_MUL_NO_EFFECT;
bestMonId = PARTY_SIZE;
// Find the mon whose type is the most suitable offensively.
for (i = firstId; i < lastId; i++)
{
u16 species = GetMonData(&party[i], MON_DATA_SPECIES);
if (species != SPECIES_NONE
&& GetMonData(&party[i], MON_DATA_HP) != 0
&& !(gBitTable[i] & invalidMons)
&& gBattlerPartyIndexes[battlerIn1] != i
&& gBattlerPartyIndexes[battlerIn2] != i
&& i != *(gBattleStruct->monToSwitchIntoId + battlerIn1)
&& i != *(gBattleStruct->monToSwitchIntoId + battlerIn2))
{
u8 type1 = gSpeciesInfo[species].types[0];
u8 type2 = gSpeciesInfo[species].types[1];
u8 typeDmg = TYPE_MUL_NORMAL;
ModulateByTypeEffectiveness(gBattleMons[opposingBattler].types[0], type1, type2, &typeDmg);
ModulateByTypeEffectiveness(gBattleMons[opposingBattler].types[1], type1, type2, &typeDmg);
/* Possible bug: this comparison gives the type that takes the most damage, when
a "good" AI would want to select the type that takes the least damage. Unknown if this
is a legitimate mistake or if it's an intentional, if weird, design choice */
if (bestDmg < typeDmg)
{
bestDmg = typeDmg;
bestMonId = i;
}
}
else
{
invalidMons |= gBitTable[i];
}
}
// Ok, we know the mon has the right typing but does it have at least one super effective move?
if (bestMonId != PARTY_SIZE)
{
for (i = 0; i < MAX_MON_MOVES; i++)
{
move = GetMonData(&party[bestMonId], MON_DATA_MOVE1 + i);
if (move != MOVE_NONE && TypeCalc(move, gActiveBattler, opposingBattler) & MOVE_RESULT_SUPER_EFFECTIVE)
break;
}
if (i != MAX_MON_MOVES)
return bestMonId; // Has both the typing and at least one super effective move.
invalidMons |= gBitTable[bestMonId]; // Sorry buddy, we want something better.
}
else
{
invalidMons = (1 << PARTY_SIZE) - 1; // No viable mon to switch.
}
}
gDynamicBasePower = 0;
gBattleStruct->dynamicMoveType = 0;
gBattleScripting.dmgMultiplier = 1;
gMoveResultFlags = 0;
gCritMultiplier = 1;
bestDmg = 0;
bestMonId = PARTY_SIZE;
// If we couldn't find the best mon in terms of typing, find the one that deals most damage.
for (i = firstId; i < lastId; i++)
{
if ((u16)(GetMonData(&party[i], MON_DATA_SPECIES)) == SPECIES_NONE)
continue;
if (GetMonData(&party[i], MON_DATA_HP) == 0)
continue;
if (gBattlerPartyIndexes[battlerIn1] == i)
continue;
if (gBattlerPartyIndexes[battlerIn2] == i)
continue;
if (i == *(gBattleStruct->monToSwitchIntoId + battlerIn1))
continue;
if (i == *(gBattleStruct->monToSwitchIntoId + battlerIn2))
continue;
for (j = 0; j < MAX_MON_MOVES; j++)
{
move = GetMonData(&party[i], MON_DATA_MOVE1 + j);
gBattleMoveDamage = 0;
if (move != MOVE_NONE && gBattleMoves[move].power != 1)
{
AI_CalcDmg(gActiveBattler, opposingBattler);
TypeCalc(move, gActiveBattler, opposingBattler);
}
if (bestDmg < gBattleMoveDamage)
{
bestDmg = gBattleMoveDamage;
bestMonId = i;
}
}
}
return bestMonId;
}
static u8 GetAI_ItemType(u8 itemId, const u8 *itemEffect) // NOTE: should take u16 as item Id argument
{
if (itemId == ITEM_FULL_RESTORE)
return AI_ITEM_FULL_RESTORE;
else if (itemEffect[4] & ITEM4_HEAL_HP)
return AI_ITEM_HEAL_HP;
else if (itemEffect[3] & ITEM3_STATUS_ALL)
return AI_ITEM_CURE_CONDITION;
else if (itemEffect[0] & (ITEM0_DIRE_HIT | ITEM0_X_ATTACK) || itemEffect[1] != 0 || itemEffect[2] != 0)
return AI_ITEM_X_STAT;
else if (itemEffect[3] & ITEM3_GUARD_SPEC)
return AI_ITEM_GUARD_SPEC;
else
return AI_ITEM_NOT_RECOGNIZABLE;
}
static bool8 ShouldUseItem(void)
{
struct Pokemon *party;
s32 i;
u8 validMons = 0;
bool8 shouldUse = FALSE;
if (gBattleTypeFlags & BATTLE_TYPE_INGAME_PARTNER && GetBattlerPosition(gActiveBattler) == B_POSITION_PLAYER_RIGHT)
return FALSE;
if (GetBattlerSide(gActiveBattler) == B_SIDE_PLAYER)
party = gPlayerParty;
else
party = gEnemyParty;
for (i = 0; i < PARTY_SIZE; i++)
{
if (GetMonData(&party[i], MON_DATA_HP) != 0
&& GetMonData(&party[i], MON_DATA_SPECIES_OR_EGG) != SPECIES_NONE
&& GetMonData(&party[i], MON_DATA_SPECIES_OR_EGG) != SPECIES_EGG)
{
validMons++;
}
}
for (i = 0; i < MAX_TRAINER_ITEMS; i++)
{
u16 item;
const u8 *itemEffects;
u8 paramOffset;
u8 battlerSide;
if (i != 0 && validMons > (gBattleResources->battleHistory->itemsNo - i) + 1)
continue;
item = gBattleResources->battleHistory->trainerItems[i];
if (item == ITEM_NONE)
continue;
if (gItemEffectTable[item - ITEM_POTION] == NULL)
continue;
if (item == ITEM_ENIGMA_BERRY)
itemEffects = gSaveBlock1Ptr->enigmaBerry.itemEffect;
else
itemEffects = gItemEffectTable[item - ITEM_POTION];
*(gBattleStruct->AI_itemType + gActiveBattler / 2) = GetAI_ItemType(item, itemEffects);
switch (*(gBattleStruct->AI_itemType + gActiveBattler / 2))
{
case AI_ITEM_FULL_RESTORE:
if (gBattleMons[gActiveBattler].hp >= gBattleMons[gActiveBattler].maxHP / 4)
break;
if (gBattleMons[gActiveBattler].hp == 0)
break;
shouldUse = TRUE;
break;
case AI_ITEM_HEAL_HP:
paramOffset = GetItemEffectParamOffset(item, 4, ITEM4_HEAL_HP);
if (paramOffset == 0)
break;
if (gBattleMons[gActiveBattler].hp == 0)
break;
if (gBattleMons[gActiveBattler].hp < gBattleMons[gActiveBattler].maxHP / 4 || gBattleMons[gActiveBattler].maxHP - gBattleMons[gActiveBattler].hp > itemEffects[paramOffset])
shouldUse = TRUE;
break;
case AI_ITEM_CURE_CONDITION:
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) = 0;
if (itemEffects[3] & ITEM3_SLEEP && gBattleMons[gActiveBattler].status1 & STATUS1_SLEEP)
{
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_HEAL_SLEEP);
shouldUse = TRUE;
}
if (itemEffects[3] & ITEM3_POISON && (gBattleMons[gActiveBattler].status1 & STATUS1_POISON
|| gBattleMons[gActiveBattler].status1 & STATUS1_TOXIC_POISON))
{
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_HEAL_POISON);
shouldUse = TRUE;
}
if (itemEffects[3] & ITEM3_BURN && gBattleMons[gActiveBattler].status1 & STATUS1_BURN)
{
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_HEAL_BURN);
shouldUse = TRUE;
}
if (itemEffects[3] & ITEM3_FREEZE && gBattleMons[gActiveBattler].status1 & STATUS1_FREEZE)
{
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_HEAL_FREEZE);
shouldUse = TRUE;
}
if (itemEffects[3] & ITEM3_PARALYSIS && gBattleMons[gActiveBattler].status1 & STATUS1_PARALYSIS)
{
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_HEAL_PARALYSIS);
shouldUse = TRUE;
}
if (itemEffects[3] & ITEM3_CONFUSION && gBattleMons[gActiveBattler].status2 & STATUS2_CONFUSION)
{
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_HEAL_CONFUSION);
shouldUse = TRUE;
}
break;
case AI_ITEM_X_STAT:
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) = 0;
if (gDisableStructs[gActiveBattler].isFirstTurn == 0)
break;
if (itemEffects[0] & ITEM0_X_ATTACK)
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_X_ATTACK);
if (itemEffects[1] & ITEM1_X_DEFEND)
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_X_DEFEND);
if (itemEffects[1] & ITEM1_X_SPEED)
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_X_SPEED);
if (itemEffects[2] & ITEM2_X_SPATK)
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_X_SPATK);
if (itemEffects[2] & ITEM2_X_ACCURACY)
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_X_ACCURACY);
if (itemEffects[0] & ITEM0_DIRE_HIT)
*(gBattleStruct->AI_itemFlags + gActiveBattler / 2) |= (1 << AI_DIRE_HIT);
shouldUse = TRUE;
break;
case AI_ITEM_GUARD_SPEC:
battlerSide = GetBattlerSide(gActiveBattler);
if (gDisableStructs[gActiveBattler].isFirstTurn != 0 && gSideTimers[battlerSide].mistTimer == 0)
shouldUse = TRUE;
break;
case AI_ITEM_NOT_RECOGNIZABLE:
return FALSE;
}
if (shouldUse)
{
BtlController_EmitTwoReturnValues(BUFFER_B, B_ACTION_USE_ITEM, 0);
*(gBattleStruct->chosenItem + (gActiveBattler / 2) * 2) = item;
gBattleResources->battleHistory->trainerItems[i] = ITEM_NONE;
return shouldUse;
}
}
return FALSE;
}