Vector2 = require("Vector2")
local showDebug = false

local generator = require("gens.circle")
local scaleSpeed = 0.1

love.graphics.setNewFont(25)

local function resetCamera()
  scale = 1
  offset = -Vector2(love.graphics.getDimensions())/2
end


resetCamera()

function round(num, numDecimalPlaces)
  local mult = 10^(numDecimalPlaces or 0)
  return math.floor(num * mult + 0.5) / mult
end

function math.clamp(x, min, max)
  return (x < min and min) or (x > max and max) or x
end


function love.keypressed(keycode, scancode)
  if scancode == "space" and love.keyboard.isDown("lctrl") then
    love.window.setFullscreen(not love.window.getFullscreen())
  elseif scancode == "f1" then
    showDebug = not showDebug
  elseif scancode == "f2" then
    resetCamera()
  end
end

function love.mousemoved(x, y, dx, dy)
  if love.mouse.isDown(1) then
    offset = offset - Vector2(dx, dy)*scale
  end
end

function love.wheelmoved(x, y)
  if y == 0 then return end
  local oldScale = scale
  if y < 0 then
    scale = scale*(1+scaleSpeed)
  else
    scale = scale*(1-scaleSpeed)
  end
  offset = offset + Vector2(love.mouse.getPosition()) * (oldScale-scale)
end


function love.draw()
  love.graphics.setColor(1, 1, 1, 1)
  generator(offset, scale)

  if showDebug then
    love.graphics.setColor(0.8, 0.2, 0.2)
    love.graphics.print("Offset: ("..round(offset.x, 2)..";"..round(offset.y, 2)..")", 0, 0)
    love.graphics.print("Zoom: "..(1/scale), 0, 30)
  end
end