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Scoresheet.elm
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Scoresheet.elm
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module Scoresheet exposing (newScoresheet, totalScore, upperBonus, Scoresheet, Box(..), countSequential)
import List exposing (..)
import Dice
import Dice exposing (Dice)
import Maybe
import Dict
type alias Score =
Int
type Box
= Available (Dice -> Scoresheet -> Scoresheet)
| Played Score
type alias Scoresheet =
{ -- upper
aces : Box
, twos : Box
, threes : Box
, fours : Box
, fives : Box
, sixes : Box
, -- lower
threeOfAKind : Box
, fourOfAKind : Box
, fullHouse : Box
, smallStraight : Box
, largeStraight : Box
, yahtzee : Box
, chance : Box
}
newScoresheet : Scoresheet
newScoresheet =
let
boxUpdate setField calcScore dice sheet =
calcScore dice |> setField sheet
in
let
numBox n setter =
Available (boxUpdate setter (sumDie n))
fBox f setter =
Available (boxUpdate setter f)
in
{ aces = numBox 1 (\sh sc -> { sh | aces = Played sc })
, twos = numBox 2 (\sh sc -> { sh | twos = Played sc })
, threes = numBox 3 (\sh sc -> { sh | threes = Played sc })
, fours = numBox 4 (\sh sc -> { sh | fours = Played sc })
, fives = numBox 5 (\sh sc -> { sh | fives = Played sc })
, sixes = numBox 6 (\sh sc -> { sh | sixes = Played sc })
, threeOfAKind = fBox (ofAKind 3) (\sh sc -> { sh | threeOfAKind = Played sc })
, fourOfAKind = fBox (ofAKind 4) (\sh sc -> { sh | fourOfAKind = Played sc })
, fullHouse = fBox fullHouse (\sh sc -> { sh | fullHouse = Played sc })
, smallStraight = fBox (straight 4 25) (\sh sc -> { sh | smallStraight = Played sc })
, largeStraight = fBox (straight 5 35) (\sh sc -> { sh | largeStraight = Played sc })
, yahtzee = fBox yahtzee (\sh sc -> { sh | yahtzee = Played sc })
, chance = fBox chance (\sh sc -> { sh | chance = Played sc })
}
sumDie : Int -> Dice -> Score
sumDie die dice =
dice |> Dice.asNumberList |> filter (\d -> d == die) |> sum
ofAKind : Int -> Dice -> Score
ofAKind n dice =
case nOfAKindHelper n (Dice.asNumberList dice) Dict.empty of
Just x ->
dice |> Dice.asNumberList |> sum
Nothing ->
0
incVal x =
case x of
Nothing ->
Just 1
Just v ->
Just (v + 1)
nOfAKindHelper n dice counter =
case dice of
[] ->
Nothing
die :: rest ->
let
newCounter =
Dict.update die incVal counter
count =
Dict.get die newCounter |> Maybe.withDefault 0
in
if count >= n then
Just die
else
nOfAKindHelper n rest newCounter
sumScores xs =
case xs of
[] ->
0
(Played x) :: rest ->
x + sumScores rest
_ :: rest ->
sumScores rest
upperTotal sheet =
sumScores
[ sheet.aces
, sheet.twos
, sheet.threes
, sheet.fours
, sheet.fives
, sheet.sixes
]
lowerTotal sheet =
sumScores
[ sheet.threeOfAKind
, sheet.fourOfAKind
, sheet.fullHouse
, sheet.smallStraight
, sheet.largeStraight
, sheet.yahtzee
, sheet.chance
]
upperBonus sheet =
if (upperTotal sheet >= 62) then
35
else
0
totalScore sheet =
upperTotal sheet + upperBonus sheet + lowerTotal sheet
yahtzee dice =
case nOfAKindHelper 5 (Dice.asNumberList dice) Dict.empty of
Just _ ->
50
_ ->
0
straight size pts dice =
if (dice |> Dice.asNumberList |> sort |> (countSequential 1 0)) >= size then
pts
else
0
countSequential current longest dice =
case dice of
head :: neck :: rest ->
let
newCurrent =
case (neck - head) of
1 ->
current + 1
0 ->
current
_ ->
1
in
countSequential newCurrent (max newCurrent longest) (neck :: rest)
[ _ ] ->
longest
[] ->
longest
fullHouse dice =
case dice |> Dice.asNumberList |> sort |> count |> Dict.values of
[ 2, 3 ] ->
25
[ 3, 2 ] ->
25
-- I think a yahtzee is technically a full house.
[ 5 ] ->
25
_ ->
0
chance dice =
dice |> Dice.asNumberList |> sum
count items =
foldr (\v d -> Dict.update v incVal d) Dict.empty items