local game = require 'game'

local M = {}

love.physics.setMeter(300)
M.world = love.physics.newWorld(0, 2000)
M.Object = game.Object:extend()

local bodies = {}
setmetatable(bodies, {__mode = 'kv'})
function M.body_object(body)
	return bodies[body]
end

function M.Object:new(pos, rotation, scale, type)
	game.Object.new(self, pos, rotation, scale)
	local x, y = unpack(self.pos)
	self.body = love.physics.newBody(M.world, x, y, type)
	self.body:setAngle(self.rot)
	bodies[self.body] = self
end

function M.Object:enable()
	game.Object.enable(self)
	if body then
		self.body:setActive(true)
	end
end

function M.Object:disable()
	game.Object.disable(self)
	self.body:setActive(false)
end

function M.Object:update()
	local x, y = self.body:getWorldPoint(0, 0)
	self.pos[1], self.pos[2] = x, y
	self.rot = self.body:getAngle()
end

local sprites = {}
setmetatable(sprites, {__mode = 'v'})

function M.simple(sprite, shape, body_type, restitution)
	local class = M.Object:extend()
	if type(sprite) == 'string' then
		sprite = sprites[sprite] or love.graphics.newImage(sprite, {dpiscale = 2})
	end
	class.sprite = sprite

	local w, h = sprite:getDimensions()
	function class:new(pos, rotation, scale)
		M.Object.new(self, pos, rotation, scale, body_type or 'dynamic')

		if not shape or shape == 'rect' then
			self.shape = love.physics.newRectangleShape(w, h)
		elseif shape == 'circle' then
			self.shape = love.physics.newCircleShape(w / 2)
		else
			self.shape = love.physics.newPolygonShape(unpack(shape))
		end
		self.fixture = love.physics.newFixture(self.body, self.shape)
		if restitution then
			self.fixture:setRestitution(restitution)
		end
	end
	return class
end

return M