--Desktop


--VARS
tBarC = 8  --titlebar color
tBarTC = 1 --titlebar text color
destBackgroundC = 1
destTextColor = colors.black

DESTINATIONS = {}
DESTINATIONS = {"Husby","Roffeborg","Petersburg","norr1","norr2","söder1","väst1","öst1","öst2","etc-","t.ex"}
LISTED_DESTINATIONS = {}
STATION = "Petersburg"

--FUNCTIONS
 function titleBar()
    term.redirect(monitor)
    term.setBackgroundColor(tBarC)
    term.setTextColor(tBarTC)
    for i=1,4 do
        term.setCursorPos(1,i)
        term.clearLine()
    end

    term.setCursorPos(1,1)
    write("Welcome to Kunjuna RailNet!")
    term.setCursorPos(3,2)
    write("Select your destination, ")
    term.setCursorPos(3,3)
    write("then collect your ticket below!")
end

function drawDestinations()
    printedLines = 0
    printedColumns = 0
    printedObj = 0

    term.setBackgroundColor(destBackgroundC)
    term.setTextColor(destTextColor)
    for i=5,12 do
        term.setCursorPos(1,i)
        term.clearLine()
    end

    for i=1,#DESTINATIONS do
        if DESTINATIONS[i] ~= STATION then
            term.setCursorPos(3+(printedColumns * 13),6 + printedLines)
            printedLines = printedLines + 1
            printedObj = printedObj + 1
            write(DESTINATIONS[i])
            LISTED_DESTINATIONS[printedObj] = DESTINATIONS[i]
            if ( printedLines > 5 ) then
                printedLines = 0
                printedColumns = printedColumns + 1
            end
        end
    end
end

function popup(msg,yPos)
    term.setBackgroundColor(colors.green)
    term.setTextColor(colors.yellow)
    term.setCursorPos(1, yPos)
    term.clearLine()
    write(msg)
end

function drawScreen()
    titleBar()
    drawDestinations()
end

function refill()
    popup("Refilling ticket machine!",9)
    sleep(1)
    redstone.setOutput("back",true)
    sleep(4)
    redstone.setOutput("back",false)
    drawScreen()
end

function printTicket()
    --print ticket
    popup("Please take your ticket!",12)
    ticketMachine.createTicket(LISTED_DESTINATIONS[clicked])

    local tableInfo = ticketMachine.getStackInSlot(1)

    if tableInfo == nil then
        refill()
    elseif tableInfo["qty"] < 2 then
        refill()
    else
        drawScreen()
    end
 end

-- MAIN
monitor = peripheral.wrap("top")
ticketMachine = peripheral.wrap("left")

monitor.setTextScale(1)
drawScreen()

while true do
--wait for user interaction (click on a name)
    local event, side, X, Y = os.pullEventRaw()

    if event == "monitor_touch" and side == "top" then
    --popup("Clicked "..X..", "..Y..".")


        if Y > 5 then
            clicked = Y - 5
            if X > 13 then
                clicked = clicked + 6
            end
        end
        popup("Printing ticket to "..LISTED_DESTINATIONS[clicked].."!",11)
        sleep(1)
        printTicket(LISTED_DESTINATIONS[clicked])
        sleep(2)
    end
end