Cards 1.0

--# Main
-- Cards

-- Use this function to perform your initial setup
function setup()
    --b=Backup("Cards v101")
    img=readImage("Dropbox:Felix") --image for back of card

    --=== UNCHECK ONE OF THE NEXT TWO LINES TO GET A DIFFERENT GAME =====
    --deal21() --simple version of 21 without betting, doesn't handle things like A being 1 or 11 properly

    dealPatience() --deal a patience hand. Touching a card shows its value at left. Nothing else yet

end

--==== PATIENCE ======
function dealPatience()
    c=Card(120,img)  --small card to fit on screen
    --deal cards
    t=CardTable(10,HEIGHT-10,c,true,8,1)
    p=Pack()
    p:shuffle()
    for i=1,7 do
        for j=1,8-i do
           t:dealCard(p,j,i,j==8-i)
        end
    end
end

--this code is just for patience
function touched(touch)
    if touch.state==BEGAN then
        local crd=t:touched(touch)
        if crd~=nil then
            if crd=="pack" then
                print("Pack")
            else
                print(c:SuitValue(crd.c))
            end
        end
    end
end

--===== 21 ========
function deal21()
    parameter.watch("Score")
    parameter.watch("bankScore")
    parameter.action("Hold", function() playBank() end)
    parameter.action("Another card", function() AddMyCard() end)
        parameter.action("Play again",function() play21Again() end)
    c=Card(200,img)  --big cards
    t=CardTable(10,HEIGHT-10,c,false,1,2.1)
    p=Pack()
    p:shuffle()
    Score=0
    bankScore=0
    cards=2
    for i=1,2 do
        local crd=t:dealCard(p,i,3.2,true) --lay out cards at fractional row intervals to look nice
        Score=GetScore(Score,crd)
    end
    status="PLAY"
end

function playBank()
    bankCards=2
    bankScore=0
    for i=1,2 do
        local crd=t:dealCard(p,i,1,true)
        bankScore=GetScore(bankScore,crd)
    end
    while bankScore<16 do
        bankScore=addBankCard()
    end
    if bankScore>=Score and bankScore<=21 then status="LOSE" else status ="WIN" end
end

function GetScore(score,crd)
    local i,j,v,s=c:SuitValue(crd.c)
    if v==1 then
        if score<=10 then score=score+11 else score=score+1 end
    else
        score=score+math.min(10,v)
    end
    return score
end

function AddMyCard()
    cards = cards + 1
    local crd=t:dealCard(p,cards,3.2,true)
    Score=GetScore(Score,crd)
    if Score>21 then status="LOSE" end
end

function addBankCard()
    bankCards = bankCards + 1
    local crd=t:dealCard(p,bankCards,1,true)
    bankScore=GetScore(bankScore,crd)
    return bankScore
end

function play21Again()
    deal21()
end

-- This function gets called once every frame
function draw()
    background(69, 146, 59, 255)
    t:draw()
    if status=="LOSE" or status=="WIN" then
        pushStyle()
        font("Copperplate")
        fontSize(48)
        fill(255)
        text("You "..status.."!",300,50)
        popStyle()
    end
end



--# Card
Card = class()
--[[
this class builds and draws the card images from scratch and provides some utilities

--]]

--class initialises by creating card design
--Parameters:
--height of card in pixels
--the image to be used on the back
--background color on the face of the card
--(optional) background color on the back of the card
-- (optional) color along the border ofthe card

--returns nothing
function Card:init(height,backImg,faceColor,backColor,borderColor)
    self.height = height
    self.backImg=backImg
    self.f=height/200 --scale font size to card size
    self.faceColor=faceColor or color(255)
    local x=100    --default border color
    self.borderColor=borderColor or color(x, x, x, 255)
    x=x*1.5 --corners are drawn with circles which appear darker than lines, so lighten colour for them
    self.cornerColor=borderColor or color(x,x,x, 150)
    self.backColor=backColor or color(154, 199, 203, 255)
    self:createCard()
    self:createSuits()
    self.value={"A","2","3","4","5","6","7","8","9","10","J","Q","K"}
    self.suit={"S","H","D","C"}
end

--this and the next function build just the front and back of the card itself
--the main problem is rounded corners
--this is done by drawing circles at the corners and then overlapping rectangles forthe final effect
function Card:createCard()
    self.cardFace=self:createOutline(true)
    self.cardBack=self:createOutline(false)
end

function Card:createOutline(face)
    --use standard 25/35 ratio
    self.width=math.floor(self.height*25/35+.5)
    local img=image(self.width,self.height)
    --create rounded corner on top right
    local corner=0.05 --distance from end of card as percent of height
    local c=math.floor(corner*self.height+0.5)
    setContext(img)
    pushStyle()
    strokeWidth(1)
    stroke(self.cornerColor)
    if face then fill(self.faceColor) else fill(self.backColor) end
    ellipse(self.width-c,self.height-c,c*2)
    ellipse(self.width-c,c,c*2)
    ellipse(c,self.height-c,c*2)
    ellipse(c,c,c*2)
    if face then stroke(self.faceColor) else stroke(self.backColor) end
    rect(0,c,self.width,self.height-c*2)
    rect(c,0,self.width-c*2,self.height)
    stroke(self.borderColor)
    line(0,c,0,self.height-c)
    line(c,0,self.width-c,0)
    line(self.width,c,self.width,self.height-c)
    line(c,self.height,self.width-c,self.height)
    --do picture on back
    if face~=true then
        sprite(self.backImg,img.width/2,img.height/2,img.width*.9)
    end
    popStyle()
    setContext()
    return img
end

--the suit images come from emoji
function Card:createSuits()
    font("AppleColorEmoji")
    self.suits={unicode2UTF8(9824),unicode2UTF8(9829),unicode2UTF8(9830),unicode2UTF8(9827)}
end

--draws a card at x,y with value of card (1-52), face=true if face up, a=angle in degrees (default 0)
function Card:draw(x,y,card,face,a)
    pushMatrix()
    translate(x+self.width/2,y-self.height/2)
    if a==nil then a=0 end
    rotate(a)
    if face then
        self:drawDetails(card)
    else
        sprite(self.cardBack,0,0)
    end
    popMatrix()
end

--draws the pack of cards at x,y (actually just 4 cards but it looks like a pack)
function Card:drawPack(x,y)
    for i=1,4 do
        local s=(i-1)*3
        self:draw(x+s,y-s,1,false)
    end
end

--draws the numbers and symbols on the front of the card
--one parameter = card value
function Card:drawDetails(card)
    sprite(self.cardFace,0,0)
    pushStyle()
    font("SourceSansPro-Regular")
    fontSize(24*self.f)
    --calculate suit and value of card
    card=card-1
    local v=card%13
    local s=(card-v)/13+1
    v=v+1
    local w=self.cardFace.width
    local h=self.cardFace.height
    if s==1 or s==4 then fill(0,0, 0, 255) else fill(255,0,0,255) end   --fill is red or black

    --half the images on a card are upside down
    --so we do them in two loops, turning the card upside down between them
    --where the card is not exactly symmetrical, eg for odd numbers, we only draw on the first loop
    for i=1,2 do
        if i==2 then rotate(180) end --turn 180 degrees to do second loop
        local u=self.suits[s]
        text(self.value[v],-w*.4,h*.4) --text in corner of card
        fontSize(16*self.f)
        text(u,-w*.4,h*.28) --suit image
        fontSize(28*self.f)
        local ss=.13*h
        --now all the symbols arranged in the middle of the card
        if v==1 then
            if i==1 then text(u,0,0) end
        elseif v==2 then
            text(u,0,.3*h)
        elseif v==3 then
            if i==1 then text(u,0,0) end
            text(u,0,.3*h)
        elseif v==4 then
            text(u,-w*.18,.3*h)
            text(u,w*.18,.3*h)
        elseif v==5 then
            text(u,-w*.18,.3*h)
            text(u,w*.18,.3*h)
            if i==1 then text(u,0,0) end
        elseif v==6 then
            text(u,-w*.18,.3*h)
            text(u,w*.18,.3*h)
            text(u,-w*.18,0)
        elseif v==7 then
            text(u,-w*.18,.3*h)
            text(u,w*.18,.3*h)
            text(u,-w*.18,0)
            if i==1 then text(u,0,.15*h) end
        elseif v==8 then
            text(u,-w*.18,.3*h)
            text(u,w*.18,.3*h)
            text(u,-w*.18,0)
            text(u,0,.15*h)
        elseif v==9 then
            text(u,-w*.18,.3*h)
            text(u,w*.18,.3*h)
            if i==1 then text(u,0,0) end
            text(u,-w*.18,.1*h)
            text(u,w*.18,.1*h)
        elseif v==10 then
            text(u,-w*.18,.3*h)
            text(u,w*.18,.3*h)
            text(u,-w*.18,.1*h)
            text(u,w*.18,.1*h)
            text(u,0,.2*h)
        else --royalty
            pushStyle()
            font("AppleColorEmoji")
            fill(255)
            fontSize(84*self.f)
            if i==1 then
                if v==11 then text(unicode2UTF8(128113))
                elseif v==12 then text(unicode2UTF8(128120))
                else text(unicode2UTF8(128116))
                end
            end
            popStyle()
        end
    end
    popStyle()
end

--used by Main and other classes
--given a value 1-52, it returns the value and suit in text and numbers, eg S,J,1,11
function Card:SuitValue(c)
    local v=(c-1)%13
    local s=(c-1-v)/13+1
    v = v + 1
    return self.value[v],self.suit[s],v,s
end

function unicode2UTF8(u) --needed for emoji
    u = math.max(0, math.floor(u)) -- A positive integer
    local UTF8
    if u < 0x80 then          -- less than  8 bits
        UTF8 = string.char(u)
    elseif u < 0x800 then     -- less than 12 bits
        local b2 = u % 0x40 + 0x80
        local b1 = math.floor(u/0x40) + 0xC0
        UTF8 = string.char(b1, b2)
    elseif u < 0x10000 then   -- less than 16 bits
        local b3 = u % 0x40 + 0x80
        local b2 = math.floor(u/0x40) % 0x40 + 0x80
        local b1 = math.floor(u/0x1000) + 0xE0
        UTF8 = string.char(b1, b2, b3)
    elseif u < 0x200000 then  -- less than 22 bits
        local b4 = u % 0x40 + 0x80
        local b3 = math.floor(u/0x40) % 0x40 + 0x80
        local b2 = math.floor(u/0x1000) % 0x40 + 0x80
        local b1 = math.floor(u/0x40000) + 0xF0
        UTF8 = string.char(b1, b2, b3, b4)
    elseif u < 0x800000 then -- less than 24 bits
        local b5 = u % 0x40 + 0x80
        local b4 = math.floor(u/0x40) % 0x40 + 0x80
        local b3 = math.floor(u/0x1000) % 0x40 + 0x80
        local b2 = math.floor(u/0x40000) % 0x40 + 0x80
        local b1 = math.floor(u/0x1000000) + 0xF8
        UTF8 = string.char(b1, b2, b3, b4, b5)
    else
        print("Error: Code point too large for Codea's Lua.")
    end
    return UTF8
end


--# CardTable
CardTable = class()
--[[
This class handles tabular card games like patience, where all the cards are in columns and rows

Most position references are in cols and rows rather than pixels, and they can be fractional
The class has two tables to keep track of cards on the table.
cards - is simply a hash table so we can scroll through all the cards quickly
tableMap - is a table laid out like the table itself, so tableMap[2][3] is the card in col 2, row 3
Currently, what is stored in these tables is a "card" which is an array with
self.counter=unique id (unused)
x,y=actual pixel position
col,row=column and row
c=value of card (1-52)
face=true if face showing

--]]

--x,y are top left of table
--c is a reference to the card class
--s=whether cards stack (overlay) on each other
--pc,ps are the location of the pack, pc=col, ps=row
function CardTable:init(x,y,c,s,pc,ps)
    self.x,self.y = x,y
    self.stacked=s
    self.card=c
    self.margin=4
    self.cards={}
    self.tableMap={}
    self.packCol,self.packRow=pc,ps
    self.counter=0
end

--deals the next card to col,row, with face=true for face up, false for face down
--returns the card dealt
function CardTable:dealCard(pack,col,row,face)
    local c=pack:nextCard()
    if c==nil then return nil end
    local x=self:colToX(col)
    local y=self:rowToY(row)
    self.counter = self.counter + 1
    local crd={id=self.counter,x=x,y=y,col=col,row=row,c=c,face=face}
    table.insert(self.cards,crd)
    self:updateTable(crd,"ADD")
    return crd
end

--tableMap
function CardTable:updateTable(crd,action)
    if action=="ADD" then
        if self.tableMap[crd.col]==nil then self.tableMap[crd.col]={} end
        self.tableMap[crd.col][crd.row]={}
        self.tableMap[crd.col][crd.row]=crd
    end
end

--helper function returns x value from a col reference
--dontStack=true if cards don't overlay
function CardTable:colToX(col,dontStack)
    local h
    if self.stacked and dontStack~=true then h=self.card.height*.25 else h=self.card.height end
    return self.x+(self.card.width+self.margin)*(col-1)
end
--helper function returns y value from a row reference
function CardTable:rowToY(row,dontStack)
    local h
    if self.stacked and dontStack~=true then h=self.card.height*.25 else h=self.card.height end
    return self.y-(h+self.margin)*(row-1)
end

--this finds which card is under x,y, very useful for touches on the screen
--it is actually quite difficult to do this when cards overlap, because all the cards in
--a column are truncated except the last one
--however this can be overcome by looking at which card(s) are under x,yn and keeping
--the card that is furthest down (lowest y value)
function CardTable:cardFromXY(x,y)
    local w,h=self.card.width,self.card.height
    local c
    for i,crd in pairs(self.cards) do
        if x>=crd.x and x<=crd.x+w and y<=crd.y and y>=crd.y-h then
            if c==nil then c=crd elseif c.row<crd.row then c=crd end
        end
    end
    if c==nil then
        local px,py=self:colToX(self.packCol,true),self:rowToY(self.packRow,true)
        if x>=px and x<=px+w and y<=py and y>=py-h then
            c="pack"
        end
    end
    return c
end

function CardTable:draw()
    for i,card in pairs(self.cards) do
        self.card:draw(card.x,card.y,card.c,card.face)
    end
    if self.packCol~=nil then
        local x,y=self:colToX(self.packCol,true),self:rowToY(self.packRow,true)
        self.card:drawPack(x,y)
    end
end

function CardTable:touched(touch)
    local crd=self:cardFromXY(touch.x,touch.y)
    if crd~=nil then return(crd) else print("Nothing touched") end
end


--# Pack
Pack = class()
--[[
Manages a pack of cards
Functions:

shuffle - shuffles the pack

nextCard - returns the next card in the pack
--]]

function Pack:init(p)
    self.pack={}
    self:shuffle()
end

function Pack:shuffle()
    self.pack={}
    local t={}
    for i=1,52 do t[i]=i end
    for i=1,52 do
        local x=math.random(1,53-i)
        self.pack[i]=t[x]
        t[x]=53-i
    end
    return self.pack
end

function Pack:nextCard()
    if #self.pack==0 then return nil end
    local c=self.pack[1]
    table.remove(self.pack,1)
    return c
end


--# Ideas

--[[

flip card over
remove card
move x layered cards
fan cards like poker hand
n packs or infinite pack, eg casino
manage discard pile

--]]