;license:MIT
;(c) 2018 by 4am
;
; User interface - click/activation callbacks
;
; Public functions
; - HandleKey
;
; (all callbacks are defined in view configuration blocks in paint.a
;  and triggered through UI actions or called from HandleKey)
;

!zone {
kGameRootDirectory                   ; length-prefixed pathname of where game subdirectories are stored
         !byte 2
         !raw  "Z/"
kArtworkRootDirectory                ; length-prefixed pathname of DHGR box art
         !byte 8
         !raw  "ARTWORK/"

; action keys for main screen (should correspond to button titles in paint.a)
.keys
         !byte $C7,ID_PLAY           ; G
         !byte $E7,ID_PLAY           ; g
         !byte $8D,ID_PLAY           ; Return
         !byte $C8,ID_CLUES          ; H
         !byte $E8,ID_CLUES          ; h
         !byte $C1,ID_BOXART         ; A
         !byte $E1,ID_BOXART         ; a
         !byte $D3,ID_OPTIONS        ; S
         !byte $E3,ID_OPTIONS        ; s
         !byte $D0,ID_PREVIOUS       ; P
         !byte $F0,ID_PREVIOUS       ; p
         !byte $88,ID_PREVIOUS       ; left arrow
         !byte $CE,ID_NEXT           ; N
         !byte $EE,ID_NEXT           ; n
         !byte $95,ID_NEXT           ; right arrow
; IDs of actions that do not correspond to WeeGUI view IDs have high bit set
ID_SCROLLUP    = $81
ID_SCROLLDOWN  = $82
         !byte $8B,ID_SCROLLUP       ; up arrow
         !byte $8A,ID_SCROLLDOWN     ; down arrow
.endkeys

BELL =         $FF3A

;------------------------------------------------------------------------------
; HandleKey
; handle keypress to activate various UI elements
;
; in:    A contains key pressed
; out:   all registers and flags clobbered
;------------------------------------------------------------------------------
HandleKey
         ldx   #.endkeys-.keys
-        cmp   .keys,x
         beq   .foundKey
         dex
         dex
         bpl   -
         rts
.foundKey
         lda   .keys+1,x
         bpl   .activateView
         cmp   #ID_SCROLLUP
         beq   .handleScrollUp
         cmp   #ID_SCROLLDOWN
         beq   .handleScrollDown
         rts
.handleScrollUp
         lda   #$01
         !byte $2C                   ; hide next LDA
.handleScrollDown
         lda   #$FF
         pha
.handleScroll
         ldx   #WGSelectView
         lda   #ID_DESCRIPTION
         jsr   WeeGUI
         ldx   #WGScrollYBy
         pla
         jsr   WeeGUI
         bra   .focusAndDoAction
.activateView
         ldx   #WGSelectView
         jsr   WeeGUI
.focusAndDoAction
         ldx   #WGViewFocus
         jsr   WeeGUI
         ldx   #WGViewFocusAction
         jsr   WeeGUI
         ldx   #WGViewUnfocus
         jmp   WeeGUI
}

;------------------------------------------------------------------------------

!zone {
callback_previous
         lda   gCurrentGame
         dec
         bpl   +
         lda   #kNumberOfGames-1
+        sta   gCurrentGame
         bra   .loadNewGameInfoAndRepaint
callback_next
         lda   gCurrentGame
         inc
         cmp   #kNumberOfGames
         bcc   +
         lda   #0
+        sta   gCurrentGame
.loadNewGameInfoAndRepaint
         jsr   LoadGameInfo
         jmp   RepaintSomeViews
}

callback_versions
         rts
callback_clues
         rts
callback_options
         rts

!zone {
callback_boxart
         jsr   ResetPath
         lda   #<kArtworkRootDirectory
         ldy   #>kArtworkRootDirectory
         jsr   AddToPath
         lda   gCurrentGame
         asl
         tax
         lda   GAMES, x
         ldy   GAMES+1, x
         jsr   AddToPath

         lda   #0                    ; set Z flag always
!cpu 65816
         rep   #2                    ; clear Z flag on 65816 only
!cpu 65c02
         beq   +                     ; skip GS-specific code on non-GS machines (required, will crash on //c, grr)
         lda   $C029
         and   #$1F
         sta   $C029                 ; set GS NEWVIDEO mode to turn off linearize

+        jsr   LoadDHRFile           ; load artwork from file
         !word gPathname
         !word kProDOSFileBuffer
         bcs   .nope

         sta   $C000                 ; display double hi-res page 1
         sta   $C00D
         sta   $C05E
         sta   $C057
         sta   $C052
         sta   $C054
         sta   $C050

         bit   $c010
-        lda   $c000
         bpl   -
         bit   $c010

         sta   $C001                 ; back to text
         sta   $C051
         rts
.nope
         jmp   BELL
}

!zone {
callback_play
LaunchInterpreter
         jsr   SaveGlobalPreferences
         jsr   ResetPath
         lda   #<.interpreterFilename
         ldy   #>.interpreterFilename
         jsr   AddToPath
         jsr   LoadFile              ; load interpreter at $2000
         !word gPathname
         !word $2000
         !word $2000
         !word kProDOSFileBuffer
         bcs   .nope
; change prefix to folder of file we want the interpreter to open
         jsr   ResetPath
         lda   #<kGameRootDirectory
         ldy   #>kGameRootDirectory
         jsr   AddToPath
         lda   gCurrentGame
         asl
         tax
         lda   GAMES,x
         ldy   GAMES+1,x
         jsr   AddToPath
         jsr   SetPrefix
         !word gPathname
; put .z3 filename at $2006
         ldy   #0
         lda   addrVersions
         sta   $00
         lda   addrVersions+1
         sta   $01
-        lda   ($00),y
         cmp   #$BD                  ; '='
         beq   .doneBuildingFilename
         iny
         and   #$7F
         sta   $2006,y
         bra   -
.doneBuildingFilename
         sty   $2006
         jsr   ExitWeeGUI
         jmp   $2000
.nope    sec
         rts
.interpreterFilename
         !byte 15
         !raw  "ONBEYOND.SYSTEM"
}