monitor = peripheral.find("monitor")
width, height = monitor.getSize()
title = "Ore Processing"

buttons = {}

function baseClick(btn)
    drawButton(btn, colors.lightGray, colors.green)
    -- os.sleep(0.25)
    -- draw()
end

function createButton(name, func, x, y, w, h, fg, bg)
    len = string.len(name)
    buttons[name] = { name = name, func = func, x = x, y = y, w = w, h = h, len = len, bg = bg, fg = fg }
    drawButton(buttons[name], fg, bg)
end

function drawButton(btn, fg, bg)
    monitor.setBackgroundColor(bg)
    monitor.setTextColor(fg)
    for i = btn.y, btn.y + btn.h do
        monitor.setCursorPos(btn.x, i)
        for j = 1, btn.w do
            monitor.write(" ")
        end
    end
    monitor.setCursorPos((btn.x + btn.x + btn.w) / 2 - btn.len / 2, (btn.y + btn.y + btn.h) / 2)
    monitor.write(btn.name)
end

function checkEvent()
    _, _, xPos, yPos = os.pullEvent("monitor_touch")
    for _, btn in pairs(buttons) do
        if (xPos >= btn.x) and (xPos < (btn.x + btn.w)) and (yPos >= btn.y) and (yPos <= (btn.y + btn.h)) then
            baseClick(btn)
            btn.func()
        end
    end
end

function draw()
    monitor.setBackgroundColor(colors.black)
    monitor.clear()
    monitor.setCursorPos(width / 2 - 7, 1)
    monitor.write(title)

    createButton("Start", test1, 3, 3, 9, 2, colors.white, colors.red)
end

function test1()
    print("test1 function called")
end

while true do
    draw()
    checkEvent()
    os.sleep(0.5)
end