path: root/engine/in_game_trades.asm

DoInGameTradeDialogue:
; trigger the trade offer/action specified by wWhichTrade
	call SaveScreenTilesToBuffer2
	ld hl,TradeMons
	ld a,[wWhichTrade]
	ld b,a
	swap a
	sub b
	sub b
	ld c,a
	ld b,0
	add hl,bc
	ld a,[hli]
	ld [wInGameTradeGiveMonSpecies],a
	ld a,[hli]
	ld [wInGameTradeReceiveMonSpecies],a
	ld a,[hli]
	push af
	ld de,wInGameTradeMonNick
	ld bc, NAME_LENGTH
	call CopyData
	pop af
	ld l,a
	ld h,0
	ld de,InGameTradeTextPointers
	add hl,hl
	add hl,de
	ld a,[hli]
	ld [wInGameTradeTextPointerTablePointer],a
	ld a,[hl]
	ld [wInGameTradeTextPointerTablePointer + 1],a
	ld a,[wInGameTradeGiveMonSpecies]
	ld de,wInGameTradeGiveMonName
	call InGameTrade_GetMonName
	ld a,[wInGameTradeReceiveMonSpecies]
	ld de,wInGameTradeReceiveMonName
	call InGameTrade_GetMonName
	ld hl,wCompletedInGameTradeFlags
	ld a,[wWhichTrade]
	ld c,a
	ld b,FLAG_TEST
	predef FlagActionPredef
	ld a,c
	and a
	ld a,$4
	ld [wInGameTradeTextPointerTableIndex],a
	jr nz,.printText
; if the trade hasn't been done yet
	xor a
	ld [wInGameTradeTextPointerTableIndex],a
	call .printText
	ld a,$1
	ld [wInGameTradeTextPointerTableIndex],a
	call YesNoChoice
	ld a,[wCurrentMenuItem]
	and a
	jr nz,.printText
	call InGameTrade_DoTrade
	jr c,.printText
	ld hl, TradedForText
	call PrintText
.printText
	ld hl,wInGameTradeTextPointerTableIndex
	ld a,[hld] ; wInGameTradeTextPointerTableIndex
	ld e,a
	ld d,0
	ld a,[hld] ; wInGameTradeTextPointerTablePointer + 1
	ld l,[hl] ; wInGameTradeTextPointerTablePointer
	ld h,a
	add hl,de
	add hl,de
	ld a,[hli]
	ld h,[hl]
	ld l,a
	jp PrintText

; copies name of species a to hl
InGameTrade_GetMonName:
	push de
	ld [wd11e],a
	call GetMonName
	ld hl,wcd6d
	pop de
	ld bc, NAME_LENGTH
	jp CopyData

INCLUDE "data/trades.asm"

InGameTrade_DoTrade:
	xor a ; NORMAL_PARTY_MENU
	ld [wPartyMenuTypeOrMessageID],a
	dec a
	ld [wUpdateSpritesEnabled],a
	call DisplayPartyMenu
	push af
	call InGameTrade_RestoreScreen
	pop af
	ld a,$1
	jp c,.tradeFailed ; jump if the player didn't select a pokemon
	ld a,[wInGameTradeGiveMonSpecies]
	ld b,a
	ld a,[wcf91]
	cp b
	ld a,$2
	jr nz,.tradeFailed ; jump if the selected mon's species is not the required one
	ld a,[wWhichPokemon]
	ld hl,wPartyMon1Level
	ld bc, wPartyMon2 - wPartyMon1
	call AddNTimes
	ld a,[hl]
	ld [wCurEnemyLVL],a
	ld hl,wCompletedInGameTradeFlags
	ld a,[wWhichTrade]
	ld c,a
	ld b,FLAG_SET
	predef FlagActionPredef
	ld hl, ConnectCableText
	call PrintText
	ld a,[wWhichPokemon]
	push af
	ld a,[wCurEnemyLVL]
	push af
	call LoadHpBarAndStatusTilePatterns
	call InGameTrade_PrepareTradeData
	predef InternalClockTradeAnim
	pop af
	ld [wCurEnemyLVL],a
	pop af
	ld [wWhichPokemon],a
	ld a,[wInGameTradeReceiveMonSpecies]
	ld [wcf91],a
	xor a
	ld [wMonDataLocation],a ; not used
	ld [wRemoveMonFromBox],a
	call RemovePokemon
	ld a,$80 ; prevent the player from naming the mon
	ld [wMonDataLocation],a
	call AddPartyMon
	call InGameTrade_CopyDataToReceivedMon
	callab EvolveTradeMon
	call ClearScreen
	call InGameTrade_RestoreScreen
	callba RedrawMapView
	and a
	ld a,$3
	jr .tradeSucceeded
.tradeFailed
	scf
.tradeSucceeded
	ld [wInGameTradeTextPointerTableIndex],a
	ret

InGameTrade_RestoreScreen:
	call GBPalWhiteOutWithDelay3
	call RestoreScreenTilesAndReloadTilePatterns
	call ReloadTilesetTilePatterns
	call LoadScreenTilesFromBuffer2
	call Delay3
	call LoadGBPal
	ld c, 10
	call DelayFrames
	jpba LoadWildData

InGameTrade_PrepareTradeData:
	ld hl, wTradedPlayerMonSpecies
	ld a, [wInGameTradeGiveMonSpecies]
	ld [hli], a ; wTradedPlayerMonSpecies
	ld a, [wInGameTradeReceiveMonSpecies]
	ld [hl], a ; wTradedEnemyMonSpecies
	ld hl, wPartyMonOT
	ld bc, NAME_LENGTH
	ld a, [wWhichPokemon]
	call AddNTimes
	ld de, wTradedPlayerMonOT
	ld bc, NAME_LENGTH
	call InGameTrade_CopyData
	ld hl, InGameTrade_TrainerString
	ld de, wTradedEnemyMonOT
	call InGameTrade_CopyData
	ld de, wLinkEnemyTrainerName
	call InGameTrade_CopyData
	ld hl, wPartyMon1OTID
	ld bc, wPartyMon2 - wPartyMon1
	ld a, [wWhichPokemon]
	call AddNTimes
	ld de, wTradedPlayerMonOTID
	ld bc, $2
	call InGameTrade_CopyData
	call Random
	ld hl, hRandomAdd
	ld de, wTradedEnemyMonOTID
	jp CopyData

InGameTrade_CopyData:
	push hl
	push bc
	call CopyData
	pop bc
	pop hl
	ret

InGameTrade_CopyDataToReceivedMon:
	ld hl, wPartyMonNicks
	ld bc, NAME_LENGTH
	call InGameTrade_GetReceivedMonPointer
	ld hl, wInGameTradeMonNick
	ld bc, NAME_LENGTH
	call CopyData
	ld hl, wPartyMonOT
	ld bc, NAME_LENGTH
	call InGameTrade_GetReceivedMonPointer
	ld hl, InGameTrade_TrainerString
	ld bc, NAME_LENGTH
	call CopyData
	ld hl, wPartyMon1OTID
	ld bc, wPartyMon2 - wPartyMon1
	call InGameTrade_GetReceivedMonPointer
	ld hl, wTradedEnemyMonOTID
	ld bc, $2
	jp CopyData

; the received mon's index is (partyCount - 1),
; so this adds bc to hl (partyCount - 1) times and moves the result to de
InGameTrade_GetReceivedMonPointer:
	ld a, [wPartyCount]
	dec a
	call AddNTimes
	ld e, l
	ld d, h
	ret

InGameTrade_TrainerString:
	; "TRAINER@@@@@@@@@@"
	db $5d, "@@@@@@@@@@"

InGameTradeTextPointers:
	dw TradeTextPointers1
	dw TradeTextPointers2
	dw TradeTextPointers3

TradeTextPointers1:
	dw WannaTrade1Text
	dw NoTrade1Text
	dw WrongMon1Text
	dw Thanks1Text
	dw AfterTrade1Text

TradeTextPointers2:
	dw WannaTrade2Text
	dw NoTrade2Text
	dw WrongMon2Text
	dw Thanks2Text
	dw AfterTrade2Text

TradeTextPointers3:
	dw WannaTrade3Text
	dw NoTrade3Text
	dw WrongMon3Text
	dw Thanks3Text
	dw AfterTrade3Text

ConnectCableText:
	TX_FAR _ConnectCableText
	db "@"

TradedForText:
	TX_FAR _TradedForText
	db $11, $a, "@"

WannaTrade1Text:
	TX_FAR _WannaTrade1Text
	db "@"

NoTrade1Text:
	TX_FAR _NoTrade1Text
	db "@"

WrongMon1Text:
	TX_FAR _WrongMon1Text
	db "@"

Thanks1Text:
	TX_FAR _Thanks1Text
	db "@"

AfterTrade1Text:
	TX_FAR _AfterTrade1Text
	db "@"

WannaTrade2Text:
	TX_FAR _WannaTrade2Text
	db "@"

NoTrade2Text:
	TX_FAR _NoTrade2Text
	db "@"

WrongMon2Text:
	TX_FAR _WrongMon2Text
	db "@"

Thanks2Text:
	TX_FAR _Thanks2Text
	db "@"

AfterTrade2Text:
	TX_FAR _AfterTrade2Text
	db "@"

WannaTrade3Text:
	TX_FAR _WannaTrade3Text
	db "@"

NoTrade3Text:
	TX_FAR _NoTrade3Text
	db "@"

WrongMon3Text:
	TX_FAR _WrongMon3Text
	db "@"

Thanks3Text:
	TX_FAR _Thanks3Text
	db "@"

AfterTrade3Text:
	TX_FAR _AfterTrade3Text
	db "@"