local PATH = (...):gsub('%.init$', '')

local Concord = {}

function Concord.init(settings)
   Concord.entity       = require(PATH..".entity")
   Concord.component    = require(PATH..".component")
   Concord.system       = require(PATH..".system")
   Concord.instance     = require(PATH..".instance")

   if settings and settings.useEvents then
      Concord.instances = {}

      Concord.addInstance = function(instance)
         table.insert(Concord.instances, instance)
      end

      Concord.removeInstance = function(instance)
         for i, instance in ipairs(Concord.instances) do
            table.remove(Concord.instances, i)
            break
         end
      end

      love.run = function()
         if love.math then
            love.math.setRandomSeed(os.time())
         	love.timer.step()
      	end

         for _, instance in ipairs(Concord.instances) do
            instance:emit("load", arg)
         end

      	if love.timer then love.timer.step() end

      	local dt = 0

      	while true do
      		if love.event then
      			love.event.pump()
      			for name, a, b, c, d, e, f in love.event.poll() do
                  for _, instance in ipairs(Concord.instances) do
                     instance:emit(name, a, b, c, d, e, f)
                  end

                  if name == "quit" then
                     return a
                  end
      			end
      		end

      		if love.timer then
      			love.timer.step()
      			dt = love.timer.getDelta()
      		end

            for _, instance in ipairs(Concord.instances) do
               instance:emit("update", dt)
            end

      		if love.graphics and love.graphics.isActive() then
      			love.graphics.clear(love.graphics.getBackgroundColor())
      			love.graphics.origin()

               for _, instance in ipairs(Concord.instances) do
                  instance:emit("draw")
               end

      			love.graphics.present()
      		end

      		if love.timer then love.timer.sleep(0.001) end
      	end
      end
   end

   return Concord
end

return Concord