os.pullEvent = os.pullEventRaw

function centerText(text, width)
    local padding = math.max(0, math.floor((width - #text) / 2))
    return string.rep(" ", padding) .. text
end

function drawBorder(width, height)
    term.setCursorPos(1, 1)
    term.write("+" .. string.rep("-", width - 2) .. "+")
    for i = 2, height - 1 do
        term.setCursorPos(1, i)
        term.write("|")
        term.setCursorPos(width, i)
        term.write("|")
    end
    term.setCursorPos(1, height)
    term.write("+" .. string.rep("-", width - 2) .. "+")
end

function drawCenteredText(width, height)
    term.setCursorPos(2, 2)
    drawBorder(width, height)

    local y = 4
    term.setCursorPos(3, y)
    print(centerText("Doggy OS Installation Media", width - 4))

    y = y + 1
    term.setCursorPos(3, y)
    print(centerText("OS VERSION: Doggy OS 13.0", width - 4))

    y = y + 1
    term.setCursorPos(3, y)
    print(centerText("UEFI: N3K0 UEFI", width - 4))

    y = y + 1
    term.setCursorPos(3, y)
    print(centerText("BOOTLOADER: VA11-ILLA 12.0", width - 4))

    y = y + 2
    term.setCursorPos(3, y)
    print(centerText("Confirm Install", width - 4))

    y = y + 1
    term.setCursorPos(3, y)
    print(centerText("Y: Install OS", width - 4))

    y = y + 1
    term.setCursorPos(3, y)
    print(centerText("N: Cancel Install", width - 4))

    y = y + 2
    term.setCursorPos(3, y)
    print(centerText("===================================", width - 4))
end

function main()
    term.clear()
    local w, h = term.getSize()
    local contentHeight = 12
    drawCenteredText(w, contentHeight + 4)

    term.setCursorPos(3, contentHeight + 5)
    local user_input = read()

    if user_input:lower() == 'y' then
        runProgram()
    elseif user_input:lower() == 'n' then
        term.clear()
        term.setCursorPos(1, 1)
        drawBorder(w, 7)
        term.setCursorPos(3, 2)
        print(centerText("The Installation Was Cancelled!", w - 4))
        term.setCursorPos(3, 3)
        print(centerText("Shutting Down...", w - 4))
        sleep(4)
        os.shutdown()
    else
        shell.run("/disk/startup")
        main()
    end
end

function runProgram()
    -- Replace the following line with the code to run your desired program
    shell.run("/disk/install")  -- Replace with your actual program name
end

main()