minetest.register_entity("pyutest_fireworks:firework", {
  initial_properties = {
    visual = "upright_sprite",
    textures = {"pyutest-firework.png", "pyutest-firework.png"},
    physical = true,
    glow = minetest.LIGHT_MAX
  },

  on_activate = function (self)
    self.object:set_velocity(vector.new(0, 10, 0))
  end,

  on_step = function (self, dtime)
    local vel = self.object:get_velocity()
    if vel.y < 0 then
      self:explode()
      self.object:remove()
      return
    end

    vel.y = vel.y - (2 * dtime)
    self.object:set_velocity(vel)
    self:trail()
  end,

  trail = function (self)
    local pos = self.object:get_pos() - vector.new(0, .5, 0)

    minetest.add_particle({
      pos = pos,
      size = 1.2,
      expirationtime = 0.6,
      glow = minetest.LIGHT_MAX,
      vertical = true,
      texture = "pyutest-firework-blast.png"
    })
  end,

  explode = function (self)
    local color = {
      r = math.random(50, 255),
      g = math.random(50, 255),
      b = math.random(50, 255),
    }
    local texture = string.format("pyutest-firework-blast.png^[colorize:%s", minetest.colorspec_to_colorstring(color))

    local pos = self.object:get_pos()

    minetest.add_particlespawner({
      amount = math.random(20, 40),
      time = 0.8,
      minexptime = 0.4,
      maxexptime = 1.4,
      minsize = 2,
      maxsize = 2,
      vertical = false,
      glow = minetest.LIGHT_MAX,

      collisiondetection = false,
      texture = texture,
      minpos = pos,
      maxpos = pos,
      minvel = vector.new(-6, -6, -6),
      maxvel = vector.new( 6,  6,  6),
    })

    minetest.sound_play({
      name = "pyutest-firework",
      gain = 3,
    }, {
      pos = pos
    })
  end
})

PyuTest.make_item("pyutest_fireworks:firework", "Firework", {}, "pyutest-firework.png", {
  on_place = function (itemstack, placer, pointed_thing)
    if pointed_thing.type == "node" then
      local pos = pointed_thing.above
      minetest.add_entity(pos, "pyutest_fireworks:firework")
      itemstack:take_item()
    end

    return itemstack
  end
})