41 lines
2.2 KiB
Factor
41 lines
2.2 KiB
Factor
USING: accessors arrays combinators.short-circuit grouping kernel lists
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lists.lazy locals math math.functions math.parser math.ranges
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models.product monads random sequences sets ui ui.gadgets.controls
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ui.gadgets.layout models.combinators ui.gadgets.alerts vectors fry
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ui.gadgets.labels shuffle ;
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IN: sudokus
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: row ( index -- row ) 1 + 9 / ceiling ;
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: col ( index -- col ) 9 mod 1 + ;
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: sq ( index -- square ) [ row ] [ col ] bi [ 3 / ceiling ] bi@ 2array ;
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: near ( a pos -- ? ) { [ [ row ] bi@ = ] [ [ col ] bi@ = ] [ [ sq ] bi@ = ] } 2|| ;
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: nth-or-lower ( n seq -- elt ) [ length 1 - 2dup > [ nip ] [ drop ] if ] keep nth ;
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:: solutions ( puzzle random? -- solutions )
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f puzzle random? [ indices [ f ] [ random? swap nth-or-lower ] if-empty ] [ index ] if
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[ :> pos
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1 9 [a,b] 80 iota [ pos near ] filter [ puzzle nth ] map prune diff
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[ 1array puzzle pos cut-slice rest surround ] map >list [ random? solutions ] bind
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] [ puzzle list-monad return ] if* ;
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: solution ( puzzle random? -- solution ) dupd solutions dup +nil+ = [ drop "Unsolvable" alert* ] [ nip car ] if ;
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: hint ( puzzle -- puzzle' ) [ [ f swap indices random dup ] [ f solution ] bi nth ] keep swapd >vector [ set-nth ] keep ;
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: create ( difficulty -- puzzle ) 81 [ f ] replicate
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40 random solution [ [ f swap [ length random ] keep set-nth ] curry times ] keep ;
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: do-sudoku ( -- ) [ [
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[
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81 [ "" ] replicate <basic> switch-models [ [ <basic> ] map 9 group [ 3 group ] map 3 group
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[ [ [ <spacer> [ [ <model-field> ->% 2 [ string>number ] fmap ]
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map <spacer> ] map concat ] <hbox> , ] map concat <spacer> ] map concat <product>
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[ "Difficulty:" <label> , "1" <basic> <model-field> -> [ string>number 1 or 1 + 10 * ] fmap
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"Generate" <model-border-btn> -> updates [ create ] fmap <spacer>
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"Hint" <model-border-btn> -> "Solve" <model-border-btn> -> ] <hbox> ,
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roll [ swap updates ] curry bi@
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[ [ hint ] fmap ] [ [ f solution ] fmap ] bi* 3array merge [ [ [ number>string ] [ "" ] if* ] map ] fmap
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] bind
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] with-self , ] <vbox> { 280 220 } >>pref-dim
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"Sudoku Sleuth" open-window ] with-ui ;
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MAIN: do-sudoku
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