;license:MIT
;(c) 2018-9 by 4am
;
; Browse Mode - main UI
;
; Public functions
; - BrowseMode
;

!zone {

;------------------------------------------------------------------------------
; BrowseMode
; main entry point for Browse Mode, which allows the user to browse the game
; catalog in alphabetical order and launch games
;
; in:    none
; out:   never returns to caller (may JMP to other major modes)
;------------------------------------------------------------------------------
BrowseMode
         ldx   #$FF
         txs
         ldx   SelectedIndex
         stx   BrowseSelectedIndex

.BrowseModeInputLoop
         jsr   WaitForKeyFor30Seconds
         bit   CLEARKBD

         ldy   #kNumBrowseKeys
-        dey
         bmi   @noKeyMatch
         cmp   .BrowseKeys,y
         bne   -
         ldx   .BrowseKeyDispatch,y
         bne   @BrowseDispatch       ; always branches

@noKeyMatch
         jsr   IsSearchKey
         beq   +
         jsr   SoftBell              ; beep on invalid input
         jmp   .BrowseModeInputLoop  ; and start over
+
         ldx   #kBrowseSearch
         ; execution falls through here
@BrowseDispatch
         ldy   .BrowseDispatchTableLo,x
         sty   @j+1
         ldy   .BrowseDispatchTableHi,x
         sty   @j+2
@j       jsr   $FDFD                 ; SMC
         jmp   .BrowseModeInputLoop

.OnSearch
         sta   InputBuffer
         lda   #$01
         sta   InputLength
         jmp   SearchMode

.OnPrevious
         dec   BrowseSelectedIndex
         jmp   +
.OnNext
         inc   BrowseSelectedIndex
+
         ldx   BrowseSelectedIndex
         cpx   #$FF
         bne   @notTooSmall
GameCount = *+1
         ldx   #$D1                  ; SMC
         dex
         bne   @done                 ; always branches
@notTooSmall
         cpx   GameCount
         bcc   @done
         ldx   #0
@done    stx   BrowseSelectedIndex
         jmp   .OnBrowseChanged

.OnLaunch
         ldx   BrowseSelectedIndex
         jsr   PlayGameFromBrowse
         jsr   BlankHGR
         jmp   .ForceBrowseChanged

.OnCheat
         jsr   ToggleCheat
         beq   .ForceBrowseChanged   ; always branches because Z=1 on exit from ToggleCheat

.OnTab
         ldx   BrowseSelectedIndex
         jsr   MiniAttractMode
         cmp   #$8D
         beq   .OnLaunch
.ForceBrowseChanged
         bit   CLEARKBD
         ldx   BrowseSelectedIndex
         ; execution falls through here
.OnBrowseChanged
         stx   @index
         jsr   okvs_nth              ; get the name of the new game
         !word gGamesListStore
@index   !byte $FD
         +STAY @key
         +STAY @key2
         jsr   GetOffscreenAddress   ; load new title screenshot offscreen
         sta   +                     ; new title screenshot (offscreen)
         jsr   LoadFile
         !word kHGRTitleDirectory
@key     !word $FDFD                 ; SMC
         !byte $00
+        !byte $FD                   ; SMC

         jsr   okvs_get
         !word gGamesListStore
@key2    !word $FDFD
         +STAY SRC                   ; A/Y points to game title (in OKVS)
         ldy   #0                    ; copy game title into search bar buffer
         lda   (SRC),y
         sta   SAVE                  ; game title length
         inc   SAVE
-        iny
         cpy   SAVE
         bcc   @printTitleChar
         lda   #" "
         +HIDE_NEXT_2_BYTES
@printTitleChar
         lda   (SRC),y               ; copy game title to UI line 2
         sta   UILine2,y
         cpy   #MaxInputLength+1
         bcc   -
         ldx   #8
-        lda   ReturnToPlay,x        ; replace games count with 'to play' label
         sta   UI_ToPlay,x
         dex
         bpl   -
         ldx   @index
         jsr   BuildUILine1WithNoDots ; build UI line 1 with bars and other shapes
         ldx   @index
         jsr   DrawSearchBarOffscreen ; actually draw the UI (offscreen)
         jmp   ShowOtherPage          ; now show everything at once

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

; indices into BrowseDispatchTable
kBrowseSearch   = 0
kBrowsePrevious = 1
kBrowseNext     = 2
kBrowseExitToSearch = 3
kBrowseTab      = 4
kBrowseLaunch   = 5
kBrowseCredits  = 6
kBrowseCheat    = 7

.BrowseDispatchTableLo
         !byte <.OnSearch
         !byte <.OnPrevious
         !byte <.OnNext
         !byte <SearchMode
         !byte <.OnTab
         !byte <.OnLaunch
         !byte <Credits
         !byte <.OnCheat
.BrowseDispatchTableHi
         !byte >.OnSearch
         !byte >.OnPrevious
         !byte >.OnNext
         !byte >SearchMode
         !byte >.OnTab
         !byte >.OnLaunch
         !byte >Credits
         !byte >.OnCheat

kNumBrowseKeys = 11                  ; number of entries in next 2 tables (each)
.BrowseKeys
         !byte $83                   ; Ctrl-C = toggle cheat mode
         !byte $AF                   ; '/' = credits
         !byte $BF                   ; '?' = credits
         !byte $A0                   ; Space = mini attract mode
         !byte $89                   ; TAB = mini attract mode
         !byte $8D                   ; ENTER = launch current game
         !byte $9B                   ; Esc = switch to search mode
         !byte $8A                   ; down arrow = next
         !byte $95                   ; right arrow = next
         !byte $8B                   ; up arrow = previous
         !byte $88                   ; left arrow = previous
.BrowseKeyDispatch
         !byte kBrowseCheat
         !byte kBrowseCredits
         !byte kBrowseCredits
         !byte kBrowseTab
         !byte kBrowseTab
         !byte kBrowseLaunch
         !byte kBrowseExitToSearch
         !byte kBrowseNext
         !byte kBrowseNext
         !byte kBrowsePrevious
         !byte kBrowsePrevious

BrowseSelectedIndex
         !byte $FF

}