path: root/engine/events_2.asm

; More overworld event handling.


WarpToSpawnPoint:: ; 97c28
	ld hl, StatusFlags2
	res 1, [hl] ; safari zone?
	res 2, [hl] ; bug contest
	ret
; 97c30

RunMemScript:: ; 97c30
; If there is no script here, we don't need to be here.
	ld a, [wMapReentryScriptQueueFlag]
	and a
	ret z
; Execute the script at (wMapReentryScriptBank):(wMapReentryScriptAddress).
	ld hl, wMapReentryScriptAddress
	ld a, [hli]
	ld h, [hl]
	ld l, a
	ld a, [wMapReentryScriptBank]
	call CallScript
	scf
; Clear the buffer for the next script.
	push af
	xor a
	ld hl, wMapReentryScriptQueueFlag
	ld bc, 8
	call ByteFill
	pop af
	ret
; 97c4f

LoadScriptBDE:: ; 97c4f
; If there's already a script here, don't overwrite.
	ld hl, wMapReentryScriptQueueFlag
	ld a, [hl]
	and a
	ret nz
; Set the flag
	ld [hl], 1
	inc hl
; Load the script pointer b:de into (wMapReentryScriptBank):(wMapReentryScriptAddress)
	ld [hl], b
	inc hl
	ld [hl], e
	inc hl
	ld [hl], d
	scf
	ret
; 97c5f

CheckFacingTileEvent:: ; 97c5f
	call GetFacingTileCoord
	ld [EngineBuffer1], a
	ld c, a
	callba CheckFacingTileForStd
	jr c, .done

	call CheckCutTreeTile
	jr nz, .whirlpool
	callba TryCutOW
	jr .done

.whirlpool
	ld a, [EngineBuffer1]
	call CheckWhirlpoolTile
	jr nz, .waterfall
	callba TryWhirlpoolOW
	jr .done

.waterfall
	ld a, [EngineBuffer1]
	call CheckWaterfallTile
	jr nz, .headbutt
	callba TryWaterfallOW
	jr .done

.headbutt
	ld a, [EngineBuffer1]
	call CheckHeadbuttTreeTile
	jr nz, .surf
	callba TryHeadbuttOW
	jr c, .done
	jr .noevent

.surf
	callba TrySurfOW
	jr nc, .noevent
	jr .done

.noevent
	xor a
	ret

.done
	call PlayClickSFX
	ld a, $ff
	scf
	ret
; 97cc0


RandomEncounter:: ; 97cc0
; Random encounter

	call CheckWildEncounterCooldown
	jr c, .nope
	call CanUseSweetScent
	jr nc, .nope
	ld hl, StatusFlags2
	bit 2, [hl] ; bug contest
	jr nz, .bug_contest
	callba TryWildEncounter
	jr nz, .nope
	jr .ok

.bug_contest
	call _TryWildEncounter_BugContest
	jr nc, .nope
	jr .ok_bug_contest

.nope
	ld a, 1
	and a
	ret

.ok
	ld a, BANK(WildBattleScript)
	ld hl, WildBattleScript
	jr .done

.ok_bug_contest
	ld a, BANK(BugCatchingContestBattleScript)
	ld hl, BugCatchingContestBattleScript
	jr .done

.done
	call CallScript
	scf
	ret
; 97cf9

WildBattleScript: ; 97cf9
	randomwildmon
	startbattle
	reloadmapafterbattle
	end
; 97cfd

CanUseSweetScent:: ; 97cfd
	ld hl, StatusFlags
	bit 5, [hl]
	jr nz, .no
	ld a, [wPermission]
	cp CAVE
	jr z, .ice_check
	cp DUNGEON
	jr z, .ice_check
	callba CheckGrassCollision
	jr nc, .no

.ice_check
	ld a, [PlayerStandingTile]
	call CheckIceTile
	jr z, .no
	scf
	ret

.no
	and a
	ret
; 97d23

_TryWildEncounter_BugContest: ; 97d23
	call TryWildEncounter_BugContest
	ret nc
	call ChooseWildEncounter_BugContest
	callba CheckRepelEffect
	ret
; 97d31

ChooseWildEncounter_BugContest:: ; 97d31
; Pick a random mon out of ContestMons.

.loop
	call Random
	cp 100 << 1
	jr nc, .loop
	srl a

	ld hl, ContestMons
	ld de, 4
.CheckMon
	sub [hl]
	jr c, .GotMon
	add hl, de
	jr .CheckMon

.GotMon
	inc hl

; Species
	ld a, [hli]
	ld [TempWildMonSpecies], a

; Min level
	ld a, [hli]
	ld d, a

; Max level
	ld a, [hl]

	sub d
	jr nz, .RandomLevel

; If min and max are the same.
	ld a, d
	jr .GotLevel

.RandomLevel
; Get a random level between the min and max.
	ld c, a
	inc c
	call Random
	ld a, [hRandomAdd]
	call SimpleDivide
	add d

.GotLevel
	ld [CurPartyLevel], a

	xor a
	ret
; 97d64

TryWildEncounter_BugContest: ; 97d64
	ld a, [PlayerStandingTile]
	call CheckSuperTallGrassTile
	ld b, 40 percent
	jr z, .ok
	ld b, 20 percent

.ok
	callba ApplyMusicEffectOnEncounterRate
	callba ApplyCleanseTagEffectOnEncounterRate
	call Random
	ld a, [hRandomAdd]
	cp b
	ret c
	ld a, 1
	and a
	ret
; 97d87

ContestMons: ; 97d87
	;   %, species,   min, max
	db 20, CATERPIE,    7, 18
	db 20, WEEDLE,      7, 18
	db 10, METAPOD,     9, 18
	db 10, KAKUNA,      9, 18
	db  5, BUTTERFREE, 12, 15
	db  5, BEEDRILL,   12, 15
	db 10, VENONAT,    10, 16
	db 10, PARAS,      10, 17
	db  5, SCYTHER,    13, 14
	db  5, PINSIR,     13, 14
	db -1, VENOMOTH,   30, 40
; 97db3

DoBikeStep:: ; 97db3
	nop
	nop
	; If the bike shop owner doesn't have our number, or
	; if we've already gotten the call, we don't have to
	; be here.
	ld hl, StatusFlags2
	bit 4, [hl] ; bike shop call
	jr z, .NoCall

	; If we're not on the bike, we don't have to be here.
	ld a, [PlayerState]
	cp PLAYER_BIKE
	jr nz, .NoCall

	; If we're not in an area of phone service, we don't
	; have to be here.
	call GetMapHeaderPhoneServiceNybble
	and a
	jr nz, .NoCall

	; Check the bike step count and check whether we've
	; taken 65536 of them yet.
	ld hl, wBikeStep
	ld a, [hli]
	ld d, a
	ld e, [hl]
	cp 255
	jr nz, .increment
	ld a, e
	cp 255
	jr z, .dont_increment

.increment
	inc de
	ld [hl], e
	dec hl
	ld [hl], d

.dont_increment
	; If we've taken at least 1024 steps, have the bike
	;  shop owner try to call us.
	ld a, d
	cp 1024 >> 8
	jr c, .NoCall

	; If a call has already been queued, don't overwrite
	; that call.
	ld a, [wSpecialPhoneCallID]
	and a
	jr nz, .NoCall

	; Queue the call.
	ld a, SPECIALCALL_BIKESHOP
	ld [wSpecialPhoneCallID], a
	xor a
	ld [wSpecialPhoneCallID + 1], a
	ld hl, StatusFlags2
	res 4, [hl] ; bike shop call
	scf
	ret

.NoCall
	xor a
	ret
; 97df9

ClearCmdQueue:: ; 97df9
	ld hl, wCmdQueue
	ld de, 6
	ld c, 4
	xor a
.loop
	ld [hl], a
	add hl, de
	dec c
	jr nz, .loop
	ret
; 97e08

HandleCmdQueue:: ; 97e08
	ld hl, wCmdQueue
	xor a
.loop
	ld [hMapObjectIndexBuffer], a
	ld a, [hl]
	and a
	jr z, .skip
	push hl
	ld b, h
	ld c, l
	call HandleQueuedCommand
	pop hl

.skip
	ld de, CMDQUEUE_ENTRY_SIZE
	add hl, de
	ld a, [hMapObjectIndexBuffer]
	inc a
	cp CMDQUEUE_CAPACITY
	jr nz, .loop
	ret
; 97e25

GetNthCmdQueueEntry: ; 97e25 unreferenced
	ld hl, wCmdQueue
	ld bc, CMDQUEUE_ENTRY_SIZE
	call AddNTimes
	ld b, h
	ld c, l
	ret
; 97e31

WriteCmdQueue:: ; 97e31
	push bc
	push de
	call .GetNextEmptyEntry
	ld d, h
	ld e, l
	pop hl
	pop bc
	ret c
	ld a, b
	ld bc, CMDQUEUE_ENTRY_SIZE - 1
	call FarCopyBytes
	xor a
	ld [hl], a
	ret
; 97e45

.GetNextEmptyEntry: ; 97e45
	ld hl, wCmdQueue
	ld de, CMDQUEUE_ENTRY_SIZE
	ld c, CMDQUEUE_CAPACITY
.loop
	ld a, [hl]
	and a
	jr z, .done
	add hl, de
	dec c
	jr nz, .loop
	scf
	ret

.done
	ld a, CMDQUEUE_CAPACITY
	sub c
	and a
	ret
; 97e5c

DelCmdQueue:: ; 97e5c
	ld hl, wCmdQueue
	ld de, CMDQUEUE_ENTRY_SIZE
	ld c, CMDQUEUE_CAPACITY
.loop
	ld a, [hl]
	cp b
	jr z, .done
	add hl, de
	dec c
	jr nz, .loop
	and a
	ret

.done
	xor a
	ld [hl], a
	scf
	ret
; 97e72

_DelCmdQueue: ; 97e72
	ld hl, CMDQUEUE_TYPE
	add hl, bc
	ld [hl], 0
	ret
; 97e79

HandleQueuedCommand: ; 97e79
	ld hl, CMDQUEUE_TYPE
	add hl, bc
	ld a, [hl]
	cp 5
	jr c, .okay
	xor a

.okay
	ld e, a
	ld d, 0
	ld hl, .Jumptable_ba
rept 3
	add hl, de
endr
	ld a, [hli]
	push af
	ld a, [hli]
	ld h, [hl]
	ld l, a
	pop af
	rst FarCall
	ret
; 97e94

.Jumptable_ba: ; 97e94
	dba CmdQueue_Null
	dba CmdQueue_Null2
	dba CmdQueue_StoneTable
	dba CmdQueue_Type3
	dba CmdQueue_Type4
; 97ea3

CmdQueueAnonymousJumptable: ; 97ea3
	ld hl, CMDQUEUE_05
	add hl, bc
	ld a, [hl]
	pop hl
	rst JumpTable
	ret
; 97eab

CmdQueueAnonJT_Increment: ; 97eab
	ld hl, CMDQUEUE_05
	add hl, bc
	inc [hl]
	ret
; 97eb1

CmdQueueAnonJT_Decrement: ; 97eb1
	ld hl, CMDQUEUE_05
	add hl, bc
	dec [hl]
	ret
; 97eb7

CmdQueue_Null: ; 97eb7
	ret
; 97eb8

CmdQueue_Null2: ; 97eb8
	call ret_2f3e
	ret
; 97ebc

CmdQueue_Type4: ; 97ebc
	call CmdQueueAnonymousJumptable
	; anonymous dw
	dw .zero
	dw .one
; 97ec3

.zero: ; 97ec3
	ld a, [hSCY]
	ld hl, 4
	add hl, bc
	ld [hl], a
	call CmdQueueAnonJT_Increment
.one: ; 97ecd
	ld hl, 1
	add hl, bc
	ld a, [hl]
	dec a
	ld [hl], a
	jr z, .asm_97eee
	and $1
	jr z, .asm_97ee4
	ld hl, 2
	add hl, bc
	ld a, [hSCY]
	sub [hl]
	ld [hSCY], a
	ret

.asm_97ee4
	ld hl, 2
	add hl, bc
	ld a, [hSCY]
	add [hl]
	ld [hSCY], a
	ret

.asm_97eee
	ld hl, 4
	add hl, bc
	ld a, [hl]
	ld [hSCY], a
	call _DelCmdQueue
	ret
; 97ef9

CmdQueue_Type3: ; 97ef9
	call CmdQueueAnonymousJumptable
	; anonymous dw
	dw .zero
	dw .one
	dw .two
; 97f02

.zero: ; 97f02
	call .IsPlayerFacingDown
	jr z, .PlayerNotFacingDown
	call CmdQueueAnonJT_Increment
.one: ; 97f0a
	call .IsPlayerFacingDown
	jr z, .PlayerNotFacingDown
	call CmdQueueAnonJT_Increment

	ld hl, 2
	add hl, bc
	ld a, [hl]
	ld [wd173], a
	ret
; 97f1b

.two: ; 97f1b
	call .IsPlayerFacingDown
	jr z, .PlayerNotFacingDown
	call CmdQueueAnonJT_Decrement

	ld hl, 3
	add hl, bc
	ld a, [hl]
	ld [wd173], a
	ret
; 97f2c

.PlayerNotFacingDown: ; 97f2c
	ld a, $7f
	ld [wd173], a
	ld hl, 5
	add hl, bc
	ld [hl], 0
	ret
; 97f38

.IsPlayerFacingDown: ; 97f38
	push bc
	ld bc, PlayerStruct
	call GetSpriteDirection
	and a
	pop bc
	ret
; 97f42

CmdQueue_StoneTable: ; 97f42
	ld de, PlayerStruct
	ld a, NUM_OBJECT_STRUCTS
.loop
	push af

	ld hl, OBJECT_SPRITE
	add hl, de
	ld a, [hl]
	and a
	jr z, .next

	ld hl, OBJECT_MOVEMENTTYPE
	add hl, de
	ld a, [hl]
	cp STEP_TYPE_SKYFALL_TOP
	jr nz, .next

	ld hl, OBJECT_NEXT_TILE
	add hl, de
	ld a, [hl]
	call CheckPitTile
	jr nz, .next

	ld hl, OBJECT_DIRECTION_WALKING
	add hl, de
	ld a, [hl]
	cp STANDING
	jr nz, .next
	call HandleStoneQueue
	jr c, .fall_down_hole

.next
	ld hl, OBJECT_STRUCT_LENGTH
	add hl, de
	ld d, h
	ld e, l

	pop af
	dec a
	jr nz, .loop
	ret

.fall_down_hole
	pop af
	ret
; 97f7e