local gui = require 'src.gui'

local wins = {
  {x = 64, y = 64, w = 64, h = 64},
}

local bw, th = 8, 16

function gui.draw()
  draw:color(0, 100, 150)
  :rect(FILL, 0, 0, gui.w, gui.h)
  :color(255, 255, 255)
  :text('This is a demo of GUI in ErDOS', gui.w / 4, gui.h / 2)
  for i = #wins, 1, -1 do
    local v = wins[i]
    draw
    :color(100, 100, 100)
    :rrect(FILL,
      v.x - bw, v.y - bw - th,
      v.w + bw * 2, v.h + bw * 2 + th,
      {bw}
    )
    :color(255, 255, 255)
    :rect(FILL, v.x, v.y, v.w, v.h)
  end
end

function AABB(x1, y1, w1, h1, x2, y2, w2, h2)
  return
      x1 + w1 > x2
  and x2 + w2 > x1
  and y1 + h1 > y2
  and y2 + h2 > y1
end

function gui.update(dt)
  updM()
  for i = 1, #wins do
    local v = wins[i]
    if AABB(m.x, m.y, 0, 0,
      v.x - bw, v.y - bw - th,
      v.w + bw * 2, v.h + bw * 2 + th
    ) then
      gui.stop()
    end
  end
end

return function(w, h)
  gui.init()
  gui.w, gui.h =
    w or gui.w or 0,
    h or gui.h or 0
end