PyuTestCore.make_node_sounds = function(tbl)
  local t = tbl or {}
  t.footstep = t.footstep or {name = "block_walk", gain = 1}
  t.dug = t.dug or {name = "block_break", gain = 0.50}
  t.place = t.place or {name = "block_place", gain = 0.50}
  return t
end

PyuTestCore.make_node = function(nsname, sname, desc, groups, tiles, extra_conf)
  local conf = {
    description = Translate(desc),
    tiles = tiles,
    groups = groups,
    sounds = PyuTestCore.make_node_sounds()
  }

  if extra_conf ~= nil then
    for k, v in pairs(extra_conf) do
      conf[k] = v
    end
  end

  minetest.register_node(nsname, conf)
  minetest.register_alias(sname, nsname)
end

PyuTestCore.node_boxes = {
  CARPET = {
    type = "fixed",
    fixed = {-0.5, -0.5, -0.5, 0.5, -0.45, 0.5}
  },
  SLAB = {
    type = "fixed",
    fixed = {-0.5, -0.5, -0.5, 0.5, 0, 0.5}
  },
  PILLAR = {
    type = "fixed",
    fixed = {-0.15, -0.5, -0.15, 0.15, 0.5, 0.15}
  }
}

PyuTestCore.make_colored_blocks = function (color, dcolor, tex, colorspec, cgroups)
  local groups = cgroups or {
    block = PyuTestCore.BLOCK_BREAKABLE_NORMAL
  }

  minetest.register_node("pyutest_core:"..color.."_block", {
    description = Translate(dcolor.." Block"),
    tiles = {tex},
    color = colorspec,
    groups = groups,
    sounds = PyuTestCore.make_node_sounds()
  })

  minetest.register_node("pyutest_core:"..color.."_carpet", {
    description = Translate(dcolor .. " Carpet"),
    tiles = {tex},
    groups = groups,
    color = colorspec,
    drawtype = "nodebox",
    paramtype = "light",
    paramtyp2 = "facedir",
    node_box = PyuTestCore.node_boxes.CARPET,
    sounds = PyuTestCore.make_node_sounds()
  })

  minetest.register_node("pyutest_core:"..color.."_slab", {
    description = Translate(dcolor.." Slab"),
    tiles = {tex},
    groups = groups,
    color = colorspec,
    drawtype = "nodebox",
    paramtype = "light",
    paramtyp2 = "facedir",
    node_box = PyuTestCore.node_boxes.SLAB,
    sounds = PyuTestCore.make_node_sounds()
  })

  minetest.register_node("pyutest_core:"..color.."_pillar", {
    description = Translate(dcolor.." Pillar"),
    tiles = {tex},
    groups = groups,
    color = colorspec,
    drawtype = "nodebox",
    paramtype = "light",
    paramtyp2 = "facedir",
    node_box = PyuTestCore.node_boxes.PILLAR,
    sounds = PyuTestCore.make_node_sounds()
  })
end

PyuTestCore.make_liquid = function (nsname, sname, desc, groups, tiles)
  local function make_liquid_flags(liquidtype)
    local drawtype = ""

    if liquidtype == "source" then
      drawtype = "liquid"
    elseif liquidtype == "flowing" then
      drawtype = "liquid"
    end

    local t = {
      drawtype = drawtype,
      waving = 3,
      walkable = false,
      pointable = false,
      buildable_to = true,
      use_texture_alpha = "blend",
      paramtype = "light",
      drop = "",
      drowning = 1,
      liquidtype = liquidtype,
      liquid_alternative_flowing = nsname.."_flowing",
      liquid_alternative_source = nsname.."_source"
    }
    return t
  end

  PyuTestCore.make_node(nsname.."_source", sname.."_source", desc .. " Source", groups, tiles, make_liquid_flags("source"))
  PyuTestCore.make_node(nsname.."_flowing", sname.."_flowing", "Flowing " .. desc, groups, tiles, make_liquid_flags("flowing"))
end

PyuTestCore.make_colored_blocks("grass", "Grass", "grass.png", nil)
PyuTestCore.make_colored_blocks("dirt", "Dirt", "dirt.png", nil)
PyuTestCore.make_colored_blocks("stone", "Stone", "stone.png", nil)
PyuTestCore.make_colored_blocks("iron", "Iron", "iron.png", nil)
PyuTestCore.make_colored_blocks("wooden", "Wooden", "wood.png", nil)
PyuTestCore.make_colored_blocks("snow", "Snow", "snow.png", nil)
PyuTestCore.make_colored_blocks("sand", "Sand", "sand.png", nil)
PyuTestCore.make_colored_blocks("sandstone", "Sandstone", "sandstone.png", nil)
PyuTestCore.make_colored_blocks("ice", "Ice", "ice.png", nil)

PyuTestCore.make_colored_blocks("white", "White", "wool.png", "white")
PyuTestCore.make_colored_blocks("red", "Red", "wool.png", "red")
PyuTestCore.make_colored_blocks("orange", "Orange", "wool.png", "orange")
PyuTestCore.make_colored_blocks("yellow", "Yellow", "wool.png", "yellow")
PyuTestCore.make_colored_blocks("green", "Green", "wool.png", "green")
PyuTestCore.make_colored_blocks("blue", "Blue", "wool.png", "blue")
PyuTestCore.make_colored_blocks("purple", "Purple", "wool.png", "purple")
PyuTestCore.make_colored_blocks("black", "Black", "wool.png", "black")

PyuTestCore.make_node("pyutest_core:light", "light", "Light", {
  snappy = 1,
  block = PyuTestCore.BLOCK_BREAKABLE_INSTANT,
  light = 1
}, {
  "light.png"
}, {
  light_source = minetest.LIGHT_MAX,
})

PyuTestCore.make_node("pyutest_core:torch", "torch", "Torch", {
  snappy = 1,
  block = PyuTestCore.BLOCK_BREAKABLE_INSTANT,
  light = 1
}, {
  "torch.png"
}, {
  light_source = 12,
  walkable = false,
  drawtype = "torchlike",
  paramtype = "light",
  inventory_image = "torch.png"
})

PyuTestCore.make_node("pyutest_core:sponge", "sponge", "Sponge", {
  snappy = 1,
  block = PyuTestCore.BLOCK_BREAKABLE_INSTANT
}, {"sponge.png"})

PyuTestCore.make_node("pyutest_core:glass", "glass", "Glass", {
  cracky = 1,
  block = PyuTestCore.BLOCK_BREAKABLE_INSTANT
}, {"glass.png"}, {
  drawtype = "glasslike_framed",
  paramtype = "light",
  sunlight_propagates = true
})

PyuTestCore.make_node("pyutest_core:flower", "rose", "Rose", {
  snappy = 1,
  block = PyuTestCore.BLOCK_BREAKABLE_INSTANT,
}, {"flower.png"}, {
  drawtype = "plantlike",
  walkable = false,
  waving = 1,
  buildable_to = true,
  paramtype = "light",
  sunlight_propagates = true,
  inventory_image = "flower.png"
})

PyuTestCore.make_node("pyutest_core:flower2", "dandelion", "Dandelion", {
  snappy = 1,
  block = PyuTestCore.BLOCK_BREAKABLE_INSTANT,
}, {"flower2.png"}, {
  drawtype = "plantlike",
  walkable = false,
  waving = 1,
  buildable_to = true,
  paramtype = "light",
  sunlight_propagates = true,
  inventory_image = "flower2.png"
})

PyuTestCore.make_node("pyutest_core:trapdoor", "trapdoor", "Trapdoor", {
  choppy = 1,
  block = PyuTestCore.BLOCK_BREAKABLE_NORMAL
}, {"trapdoor.png"}, {
  drawtype = "nodebox",
  paramtype = "light",
  sunlight_propagates = true,
  node_box = {
    type = "fixed",
    fixed = {-0.5, -0.5, -0.5, 0.5, -0.15, 0.5}
  }
})

PyuTestCore.make_liquid("pyutest_core:water", "water", "Water", {}, {"water.png"})