local S = minetest.get_translator(minetest.get_current_modname())
local F = minetest.formspec_escape
local C = minetest.colorize
local mod_doc = minetest.get_modpath("doc")

-- Chest Entity
local animate_chests = (minetest.settings:get_bool("animated_chests") ~= false)
local entity_animations = {
	shulker = {
		speed = 50,
		open = {x = 45, y = 95},
		close = {x = 95, y = 145},
	},
	chest = {
		speed = 25,
		open = {x = 0, y = 7},
		close = {x = 13, y = 20},
	}
}

-- Returns position of the neighbor of a double chest node
-- or nil if node is invalid.
-- This function assumes that the large chest is actually intact
-- * pos: Position of the node to investigate
-- * param2: param2 of that node
-- * side: Which "half" the investigated node is. "left" or "right"
local function get_double_container_neighbor_pos(pos, param2, side)
	local pos = pos
	local param2 = param2
	if side == "right" then
		if param2 == 0 then return {x=pos.x-1, y=pos.y, z=pos.z}
		elseif param2 == 1 then return {x=pos.x, y=pos.y, z=pos.z+1}
		elseif param2 == 2 then return {x=pos.x+1, y=pos.y, z=pos.z}
		elseif param2 == 3 then return {x=pos.x, y=pos.y, z=pos.z-1}
		end
	else
		if param2 == 0 then return {x=pos.x+1, y=pos.y, z=pos.z}
		elseif param2 == 1 then return {x=pos.x, y=pos.y, z=pos.z-1}
		elseif param2 == 2 then return {x=pos.x-1, y=pos.y, z=pos.z}
		elseif param2 == 3 then return {x=pos.x, y=pos.y, z=pos.z+1}
		end
	end
end

minetest.register_entity("mcl_chests:chest", {
	initial_properties = {
		visual = "mesh",
		visual_size = {x = 3, y = 3},
		pointable = false,
		physical = false,
		static_save = false,
	},

	set_animation = function(self, animname)
		local anim_table = entity_animations[self.animation_type]
		local anim = anim_table[animname]
		if not anim then return end
		self.object:set_animation(anim, anim_table.speed, 0, false)
	end,

	open = function(self, playername)
		self.players[playername] = true
		if not self.is_open then
			self:set_animation("open")
			minetest.sound_play(self.sound_prefix .. "_open", {
				pos = self.node_pos,
			})
			self.is_open = true
		end
	end,

	close = function(self, playername)
		local playerlist = self.players
		playerlist[playername] = nil
		if self.is_open then
			if next(playerlist) then
				return
			end
			self:set_animation("close")
			minetest.sound_play(self.sound_prefix .. "_close", {
				pos = self.node_pos,
			})
			self.is_open = false
		end
	end,

	initialize = function(self, node_pos, node_name, textures, dir, double, sound_prefix, mesh_prefix, animation_type)
		self.node_pos = node_pos
		self.node_name = node_name
		self.sound_prefix = sound_prefix
		self.animation_type = animation_type
		local obj = self.object
		obj:set_properties({
			textures = textures,
			mesh = mesh_prefix .. (double and "_double" or "") .. ".b3d",
		})
		self:set_yaw(dir)
	end,

	reinitialize = function(self, node_name)
		self.node_name = node_name
	end,

	set_yaw = function(self, dir)
		self.object:set_yaw(minetest.dir_to_yaw(dir))
	end,

	check = function(self)
		local node_pos, node_name = self.node_pos, self.node_name
		if not node_pos or not node_name then
			return false
		end
		local node = minetest.get_node(node_pos)
		if node.name ~= node_name then
			return false
		end
		return true
	end,

	on_activate = function(self)
		self.object:set_armor_groups({immortal = 1})
		self.players = {}
	end,

	on_step = function(self, dtime)
		if not self:check() then
			self.object:remove()
		end
	end
})

local function get_entity_pos(pos, dir, double)
	pos = vector.new(pos)
	pos.y = pos.y - 0.49
	if double then
		local add, mul, vec, cross = vector.add, vector.multiply, vector.new, vector.cross
		pos = add(pos, mul(cross(dir, vec(0, 1, 0)), -0.5))
	end
	return pos
end

local function find_entity(pos)
	for _, obj in pairs(minetest.get_objects_inside_radius(pos, 0)) do
		local luaentity = obj:get_luaentity()
		if luaentity and luaentity.name == "mcl_chests:chest" then
			return luaentity
		end
	end
end

local function get_entity_info(pos, param2, double, dir, entity_pos)
	dir = dir or minetest.facedir_to_dir(param2)
	return dir, get_entity_pos(pos, dir, double)
end

local function create_entity(pos, node_name, textures, param2, double, sound_prefix, mesh_prefix, animation_type, dir, entity_pos)
	dir, entity_pos = get_entity_info(pos, param2, double, dir, entity_pos)
	local obj = minetest.add_entity(entity_pos, "mcl_chests:chest")
	local luaentity = obj:get_luaentity()
	luaentity:initialize(pos, node_name, textures, dir, double, sound_prefix, mesh_prefix, animation_type)
	return luaentity
end

local function find_or_create_entity(pos, node_name, textures, param2, double, sound_prefix, mesh_prefix, animation_type, dir, entity_pos)
	dir, entity_pos = get_entity_info(pos, param2, double, dir, entity_pos)
	return find_entity(entity_pos) or create_entity(pos, node_name, textures, param2, double, sound_prefix, mesh_prefix, animation_type, dir, entity_pos)
end

local no_rotate, simple_rotate
if minetest.get_modpath("screwdriver") then
	no_rotate = screwdriver.disallow
	simple_rotate = function(pos, node, user, mode, new_param2)
		if screwdriver.rotate_simple(pos, node, user, mode, new_param2) ~= false then
			local nodename = node.name
			local nodedef = minetest.registered_nodes[nodename]
			local dir = minetest.facedir_to_dir(new_param2)
			find_or_create_entity(pos, nodename, nodedef._chest_entity_textures, new_param2, false, nodedef._chest_entity_sound, nodedef._chest_entity_mesh, nodedef._chest_entity_animation_type, dir):set_yaw(dir)
		else
			return false
		end
	end
end

--[[ List of open chests.
Key: Player name
Value:
	If player is using a chest: { pos = <chest node position> }
	Otherwise: nil ]]
local open_chests = {}

--[[local function back_is_blocked(pos, dir)
	pos = vector.add(pos, dir)
	local def = minetest.registered_nodes[minetest.get_node(pos).name]
	pos.y = pos.y + 1
	local def2 = minetest.registered_nodes[minetest.get_node(pos).name]
	return not def or def.groups.opaque == 1 or not def2 or def2.groups.opaque == 1
end]]

-- To be called if a player opened a chest
local function player_chest_open(player, pos, node_name, textures, param2, double, sound, mesh, shulker)
	local name = player:get_player_name()
	open_chests[name] = {pos = pos, node_name = node_name, textures = textures, param2 = param2, double = double, sound = sound, mesh = mesh, shulker = shulker}
	if animate_chests and not string.find(node_name, "barrel") then
		local dir = minetest.facedir_to_dir(param2)
		find_or_create_entity(pos, node_name, textures, param2, double, sound, mesh, shulker and "shulker" or "chest", dir):open(name)
	end
end

-- Simple protection checking functions
local function protection_check_move(pos, from_list, from_index, to_list, to_index, count, player)
	local name = player:get_player_name()
	if minetest.is_protected(pos, name) then
		minetest.record_protection_violation(pos, name)
		return 0
	else
		return count
	end
end
local function protection_check_put_take(pos, listname, index, stack, player)
	local name = player:get_player_name()
	if minetest.is_protected(pos, name) then
		minetest.record_protection_violation(pos, name)
		return 0
	else
		return stack:get_count()
	end
end

local trapped_chest_mesecons_rules = mesecon.rules.pplate

-- To be called when a chest is closed (only relevant for trapped chest atm)
local function chest_update_after_close(pos)
	local node = minetest.get_node(pos)

	if node.name == "mcl_chests:trapped_chest_on_small" then
		minetest.swap_node(pos, {name="mcl_chests:trapped_chest_small", param2 = node.param2})
		find_or_create_entity(pos, "mcl_chests:trapped_chest_small", {"mcl_chests_trapped.png"}, node.param2, false, "default_chest", "mcl_chests_chest", "chest"):reinitialize("mcl_chests:trapped_chest_small")
		mesecon.receptor_off(pos, trapped_chest_mesecons_rules)
	elseif node.name == "mcl_chests:trapped_chest_on_left" then
		minetest.swap_node(pos, {name="mcl_chests:trapped_chest_left", param2 = node.param2})
		find_or_create_entity(pos, "mcl_chests:trapped_chest_left", {"mcl_chests_trapped_double.png"}, node.param2, true, "default_chest", "mcl_chests_chest", "chest"):reinitialize("mcl_chests:trapped_chest_left")
		mesecon.receptor_off(pos, trapped_chest_mesecons_rules)

		local pos_other = get_double_container_neighbor_pos(pos, node.param2, "left")
		minetest.swap_node(pos_other, {name="mcl_chests:trapped_chest_right", param2 = node.param2})
		mesecon.receptor_off(pos_other, trapped_chest_mesecons_rules)
	elseif node.name == "mcl_chests:trapped_chest_on_right" then
		minetest.swap_node(pos, {name="mcl_chests:trapped_chest_right", param2 = node.param2})
		mesecon.receptor_off(pos, trapped_chest_mesecons_rules)

		local pos_other = get_double_container_neighbor_pos(pos, node.param2, "right")
		minetest.swap_node(pos_other, {name="mcl_chests:trapped_chest_left", param2 = node.param2})
		find_or_create_entity(pos_other, "mcl_chests:trapped_chest_left", {"mcl_chests_trapped_double.png"}, node.param2, true, "default_chest", "mcl_chests_chest", "chest"):reinitialize("mcl_chests:trapped_chest_left")
		mesecon.receptor_off(pos_other, trapped_chest_mesecons_rules)
	elseif node.name == "mcl_chests:barrel_open" then
		minetest.swap_node(pos, {name = "mcl_chests:barrel", param2 = node.param2})
	end
end

-- To be called if a player closed a chest
local function player_chest_close(player)
	local name = player:get_player_name()
	local open_chest = open_chests[name]
	if open_chest == nil then
		return
	end
	if animate_chests and not string.find(open_chest.node_name, "barrel") then
		find_or_create_entity(open_chest.pos, open_chest.node_name, open_chest.textures, open_chest.param2, open_chest.double, open_chest.sound, open_chest.mesh, open_chest.shulker and "shulker" or "chest"):close(name)
	end
	chest_update_after_close(open_chest.pos)

	open_chests[name] = nil
end

local function drop_item_stack(pos, stack)
	if not stack or stack:is_empty() then return end
	local drop_offset = vector.new(math.random() - 0.5, 0, math.random() - 0.5)
	minetest.add_item(vector.add(pos, drop_offset), stack)
end

local function drop_items_chest(pos, oldnode, oldmetadata, digger)
	if oldmetadata and oldmetadata.inventory then
		-- process after_dig_node callback
		local main = oldmetadata.inventory.main
		if not main then return end
		for _, stack in pairs(main) do
			drop_item_stack(pos, stack)
		end
	else
		local meta = minetest.get_meta(pos)
		local inv = meta:get_inventory()
		for i = 1, inv:get_size("main") do
			drop_item_stack(pos, inv:get_stack("main", i))
		end
		meta:from_table()
	end
end

local function on_chest_blast(pos, intensity)
	local node = minetest.get_node(pos)
	drop_items_chest(pos, node)
	minetest.remove_node(pos)
	-- drop node itself with some probability depended on explosion intensity (1 for TNT):
	if math.random(1, math.floor((intensity or 1) * 2)) ~= 1 then return end
	local node_def = minetest.registered_nodes[node.name]
	if not node_def then return end
	local node_name = node_def.drop or node_def.name
	drop_item_stack(pos, ItemStack(node_name))
end

local function close_forms(canonical_basename, pos)
	local players = minetest.get_connected_players()
	for p=1, #players do
		if vector.distance(players[p]:get_pos(), pos) <= 30 then
			minetest.close_formspec(players[p]:get_player_name(), "mcl_chests:"..canonical_basename.."_"..pos.x.."_"..pos.y.."_"..pos.z)
		end
	end
end

-- This is a helper function to register both chests and trapped chests. Trapped chests will make use of the additional parameters
local function register_chest(basename, desc, longdesc, usagehelp, tt_help, tiles_table, hidden, mesecons, on_rightclick_addendum, on_rightclick_addendum_left, on_rightclick_addendum_right, drop, canonical_basename)
	-- START OF register_chest FUNCTION BODY
	if not drop then
		drop = "mcl_chests:"..basename
	else
		drop = "mcl_chests:"..drop
	end
	-- The basename of the "canonical" version of the node, if set (e.g.: trapped_chest_on → trapped_chest).
	-- Used to get a shared formspec ID and to swap the node back to the canonical version in on_construct.
	if not canonical_basename then
		canonical_basename = basename
	end

	local function double_chest_add_item(top_inv, bottom_inv, listname, stack)
		if not stack or stack:is_empty() then
			return
		end

		local name = stack:get_name()

		local function top_off(inv, stack)
			for c, chest_stack in ipairs(inv:get_list(listname)) do
				if stack:is_empty() then
					break
				end

				if chest_stack:get_name() == name and chest_stack:get_free_space() > 0 then
					stack = chest_stack:add_item(stack)
					inv:set_stack(listname, c, chest_stack)
				end
			end

			return stack
		end

		stack = top_off(top_inv, stack)
		stack = top_off(bottom_inv, stack)

		if not stack:is_empty() then
			stack = top_inv:add_item(listname, stack)
			if not stack:is_empty() then
				bottom_inv:add_item(listname, stack)
			end
		end
	end

	local function limit_put_list(stack, list)
		for _, other in ipairs(list) do
			stack = other:add_item(stack)
			if stack:is_empty() then
				break
			end
		end
		return stack
	end

	local function limit_put(stack, inv1, inv2)
		local leftover = ItemStack(stack)
		leftover = limit_put_list(leftover, inv1:get_list("main"))
		if inv2 then
			leftover = limit_put_list(leftover, inv2:get_list("main"))
		end
		return stack:get_count() - leftover:get_count()
	end

	local small_name = "mcl_chests:"..basename.."_small"
	local small_textures = tiles_table.small
	local left_name = "mcl_chests:"..basename.."_left"
	local left_textures = tiles_table.double

	minetest.register_node("mcl_chests:"..basename, {
		description = desc,
		_tt_help = tt_help,
		_doc_items_longdesc = longdesc,
		_doc_items_usagehelp = usagehelp,
		_doc_items_hidden = hidden,
		drawtype = "mesh",
		mesh = "mcl_chests_chest.obj",
		tiles = small_textures,
		use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "opaque" or false,
		paramtype = "light",
		paramtype2 = "facedir",
		stack_max = 64,
		sounds = mcl_sounds.node_sound_wood_defaults(),
		groups = {deco_block=1},
		on_construct = function(pos, node)
			local node = minetest.get_node(pos)
			node.name = small_name
			minetest.set_node(pos, node)
		end,
		after_place_node = function(pos, placer, itemstack, pointed_thing)
			minetest.get_meta(pos):set_string("name", itemstack:get_meta():get_string("name"))
		end,
	})

	minetest.register_node(small_name, {
		description = desc,
		_tt_help = tt_help,
		_doc_items_longdesc = longdesc,
		_doc_items_usagehelp = usagehelp,
		_doc_items_hidden = hidden,
		drawtype = "nodebox",
		node_box = {
			type = "fixed",
			fixed = {-0.4375, -0.5, -0.4375, 0.4375, 0.375, 0.4375},
		},
		tiles = {"mcl_chests_blank.png"},
		use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
		_chest_entity_textures = small_textures,
		_chest_entity_sound = "default_chest",
		_chest_entity_mesh = "mcl_chests_chest",
		_chest_entity_animation_type = "chest",
		paramtype = "light",
		paramtype2 = "facedir",
		stack_max = 64,
		drop = drop,
		groups = {handy=1,axey=1, container=2, deco_block=1, material_wood=1,flammable=-1,chest_entity=1, not_in_creative_inventory=1},
		is_ground_content = false,
		sounds = mcl_sounds.node_sound_wood_defaults(),
		on_construct = function(pos)
			local param2 = minetest.get_node(pos).param2
			local meta = minetest.get_meta(pos)
			--[[ This is a workaround for Minetest issue 5894
			<https://github.com/minetest/minetest/issues/5894>.
			Apparently if we don't do this, large chests initially don't work when
			placed at chunk borders, and some chests randomly don't work after
			placing. ]]
			-- FIXME: Remove this workaround when the bug has been fixed.
			-- BEGIN OF WORKAROUND --
			meta:set_string("workaround", "ignore_me")
			meta:set_string("workaround", nil) -- Done to keep metadata clean
			-- END OF WORKAROUND --
			local inv = meta:get_inventory()
			inv:set_size("main", 9*3)
			--[[ The "input" list is *another* workaround (hahahaha!) around the fact that Minetest
			does not support listrings to put items into an alternative list if the first one
			happens to be full. See <https://github.com/minetest/minetest/issues/5343>.
			This list is a hidden input-only list and immediately puts items into the appropriate chest.
			It is only used for listrings and hoppers. This workaround is not that bad because it only
			requires a simple “inventory allows” check for large chests.]]
			-- FIXME: Refactor the listrings as soon Minetest supports alternative listrings
			-- BEGIN OF LISTRING WORKAROUND
			inv:set_size("input", 1)
			-- END OF LISTRING WORKAROUND
			if minetest.get_node(get_double_container_neighbor_pos(pos, param2, "right")).name == "mcl_chests:"..canonical_basename.."_small" then
				minetest.swap_node(pos, {name="mcl_chests:"..canonical_basename.."_right",param2=param2})
				local p = get_double_container_neighbor_pos(pos, param2, "right")
				minetest.swap_node(p, { name = "mcl_chests:"..canonical_basename.."_left", param2 = param2 })
				create_entity(p, "mcl_chests:"..canonical_basename.."_left", left_textures, param2, true, "default_chest", "mcl_chests_chest", "chest")
			elseif minetest.get_node(get_double_container_neighbor_pos(pos, param2, "left")).name == "mcl_chests:"..canonical_basename.."_small" then
				minetest.swap_node(pos, {name="mcl_chests:"..canonical_basename.."_left",param2=param2})
				create_entity(pos, "mcl_chests:"..canonical_basename.."_left", left_textures, param2, true, "default_chest", "mcl_chests_chest", "chest")
				local p = get_double_container_neighbor_pos(pos, param2, "left")
				minetest.swap_node(p, { name = "mcl_chests:"..canonical_basename.."_right", param2 = param2 })
			else
				minetest.swap_node(pos, { name = "mcl_chests:"..canonical_basename.."_small", param2 = param2 })
				create_entity(pos, small_name, small_textures, param2, false, "default_chest", "mcl_chests_chest", "chest")
			end
		end,
		after_place_node = function(pos, placer, itemstack, pointed_thing)
			minetest.get_meta(pos):set_string("name", itemstack:get_meta():get_string("name"))
		end,
		after_dig_node = drop_items_chest,
		on_blast = on_chest_blast,
		allow_metadata_inventory_move = protection_check_move,
		allow_metadata_inventory_take = protection_check_put_take,
		allow_metadata_inventory_put = protection_check_put_take,
		on_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
			minetest.log("action", player:get_player_name()..
					" moves stuff in chest at "..minetest.pos_to_string(pos))
		end,
		on_metadata_inventory_put = function(pos, listname, index, stack, player)
			minetest.log("action", player:get_player_name()..
					" moves stuff to chest at "..minetest.pos_to_string(pos))
			-- BEGIN OF LISTRING WORKAROUND
			if listname == "input" then
				local inv = minetest.get_inventory({type="node", pos=pos})
				inv:add_item("main", stack)
			end
			-- END OF LISTRING WORKAROUND
		end,
		on_metadata_inventory_take = function(pos, listname, index, stack, player)
			minetest.log("action", player:get_player_name()..
					" takes stuff from chest at "..minetest.pos_to_string(pos))
		end,
		_mcl_blast_resistance = 2.5,
		_mcl_hardness = 2.5,

		on_rightclick = function(pos, node, clicker)
			if minetest.registered_nodes[minetest.get_node({x = pos.x, y = pos.y + 1, z = pos.z}).name].groups.opaque == 1 then
				-- won't open if there is no space from the top
				return false
			end
			local name = minetest.get_meta(pos):get_string("name")
			if name == "" then
				name = S("Chest")
			end

			minetest.show_formspec(clicker:get_player_name(),
			"mcl_chests:"..canonical_basename.."_"..pos.x.."_"..pos.y.."_"..pos.z,
			"size[9,8.75]"..
			"label[0,0;"..F(C("#313131", name)).."]"..
			"list[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main;0,0.5;9,3;]"..
			mcl_formspec.get_itemslot_bg(0,0.5,9,3)..
			"label[0,4.0;"..F(C("#313131", S("Inventory"))).."]"..
			"list[current_player;main;0,4.5;9,3;9]"..
			mcl_formspec.get_itemslot_bg(0,4.5,9,3)..
			"list[current_player;main;0,7.74;9,1;]"..
			mcl_formspec.get_itemslot_bg(0,7.74,9,1)..
			"listring[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main]"..
			"listring[current_player;main]")

			if on_rightclick_addendum then
				on_rightclick_addendum(pos, node, clicker)
			end

			player_chest_open(clicker, pos, small_name, small_textures, node.param2, false, "default_chest", "mcl_chests_chest")
		end,

		on_destruct = function(pos)
			close_forms(canonical_basename, pos)
		end,
		mesecons = mesecons,
		on_rotate = simple_rotate,
	})

	minetest.register_node(left_name, {
		drawtype = "nodebox",
		node_box = {
			type = "fixed",
			fixed = {-0.4375, -0.5, -0.4375, 0.5, 0.375, 0.4375},
		},
		tiles = {"mcl_chests_blank.png"},
		use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
		_chest_entity_textures = left_textures,
		_chest_entity_sound = "default_chest",
		_chest_entity_mesh = "mcl_chests_chest",
		_chest_entity_animation_type = "chest",
		paramtype = "light",
		paramtype2 = "facedir",
		groups = {handy=1,axey=1, container=5,not_in_creative_inventory=1, material_wood=1,flammable=-1,chest_entity=1,double_chest=1},
		drop = drop,
		is_ground_content = false,
		sounds = mcl_sounds.node_sound_wood_defaults(),
		on_construct = function(pos)
			local n = minetest.get_node(pos)
			local param2 = n.param2
			local p = get_double_container_neighbor_pos(pos, param2, "left")
			if not p or minetest.get_node(p).name ~= "mcl_chests:"..canonical_basename.."_right" then
				n.name = "mcl_chests:"..canonical_basename.."_small"
				minetest.swap_node(pos, n)
			end
			create_entity(pos, left_name, left_textures, param2, true, "default_chest", "mcl_chests_chest", "chest")
		end,
		after_place_node = function(pos, placer, itemstack, pointed_thing)
			minetest.get_meta(pos):set_string("name", itemstack:get_meta():get_string("name"))
		end,
		on_destruct = function(pos)
			local n = minetest.get_node(pos)
			if n.name == small_name then
				return
			end

			close_forms(canonical_basename, pos)

			local param2 = n.param2
			local p = get_double_container_neighbor_pos(pos, param2, "left")
			if not p or minetest.get_node(p).name ~= "mcl_chests:"..basename.."_right" then
				return
			end
			close_forms(canonical_basename, p)

			minetest.swap_node(p, { name = small_name, param2 = param2 })
			create_entity(p, small_name, small_textures, param2, false, "default_chest", "mcl_chests_chest", "chest")
		end,
		after_dig_node = drop_items_chest,
		on_blast = on_chest_blast,
		allow_metadata_inventory_move = protection_check_move,
		allow_metadata_inventory_take = protection_check_put_take,
		allow_metadata_inventory_put = function(pos, listname, index, stack, player)
			local name = player:get_player_name()
			if minetest.is_protected(pos, name) then
				minetest.record_protection_violation(pos, name)
				return 0
			-- BEGIN OF LISTRING WORKAROUND
			elseif listname == "input" then
				local inv = minetest.get_inventory({type="node", pos=pos})
				local other_pos = get_double_container_neighbor_pos(pos, minetest.get_node(pos).param2, "left")
				local other_inv = minetest.get_inventory({type="node", pos=other_pos})
				return limit_put(stack, inv, other_inv)
				--[[if inv:room_for_item("main", stack) then
					return -1
				else

					if other_inv:room_for_item("main", stack) then
						return -1
					else
						return 0
					end
				end]]--
			-- END OF LISTRING WORKAROUND
			else
				return stack:get_count()
			end
		end,
		on_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
			minetest.log("action", player:get_player_name()..
					" moves stuff in chest at "..minetest.pos_to_string(pos))
		end,
		on_metadata_inventory_put = function(pos, listname, index, stack, player)
			minetest.log("action", player:get_player_name()..
					" moves stuff to chest at "..minetest.pos_to_string(pos))
			-- BEGIN OF LISTRING WORKAROUND
			if listname == "input" then
				local inv = minetest.get_inventory({type="node", pos=pos})
				local other_pos = get_double_container_neighbor_pos(pos, minetest.get_node(pos).param2, "left")
				local other_inv = minetest.get_inventory({type="node", pos=other_pos})

				inv:set_stack("input", 1, nil)

				double_chest_add_item(inv, other_inv, "main", stack)
			end
			-- END OF LISTRING WORKAROUND
		end,
		on_metadata_inventory_take = function(pos, listname, index, stack, player)
			minetest.log("action", player:get_player_name()..
					" takes stuff from chest at "..minetest.pos_to_string(pos))
		end,
		_mcl_blast_resistance = 2.5,
		_mcl_hardness = 2.5,

		on_rightclick = function(pos, node, clicker)
			local pos_other = get_double_container_neighbor_pos(pos, node.param2, "left")
			local above_def = minetest.registered_nodes[minetest.get_node({x = pos.x, y = pos.y + 1, z = pos.z}).name]
			local above_def_other = minetest.registered_nodes[minetest.get_node({x = pos_other.x, y = pos_other.y + 1, z = pos_other.z}).name]

			if not above_def or above_def.groups.opaque == 1 or not above_def_other or above_def_other.groups.opaque == 1 then
				-- won't open if there is no space from the top
				return false
			end

			local name = minetest.get_meta(pos):get_string("name")
			if name == "" then
				name = minetest.get_meta(pos_other):get_string("name")
			end
			if name == "" then
				name = S("Large Chest")
			end

			minetest.show_formspec(clicker:get_player_name(),
			"mcl_chests:"..canonical_basename.."_"..pos.x.."_"..pos.y.."_"..pos.z,
			"size[9,11.5]"..
			"label[0,0;"..F(C("#313131", name)).."]"..
			"list[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main;0,0.5;9,3;]"..
			mcl_formspec.get_itemslot_bg(0,0.5,9,3)..
			"list[nodemeta:"..pos_other.x..","..pos_other.y..","..pos_other.z..";main;0,3.5;9,3;]"..
			mcl_formspec.get_itemslot_bg(0,3.5,9,3)..
			"label[0,7;"..F(C("#313131", S("Inventory"))).."]"..
			"list[current_player;main;0,7.5;9,3;9]"..
			mcl_formspec.get_itemslot_bg(0,7.5,9,3)..
			"list[current_player;main;0,10.75;9,1;]"..
			mcl_formspec.get_itemslot_bg(0,10.75,9,1)..
			-- BEGIN OF LISTRING WORKAROUND
			"listring[current_player;main]"..
			"listring[nodemeta:"..pos.x..","..pos.y..","..pos.z..";input]"..
			-- END OF LISTRING WORKAROUND
			"listring[current_player;main]"..
			"listring[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main]"..
			"listring[current_player;main]"..
			"listring[nodemeta:"..pos_other.x..","..pos_other.y..","..pos_other.z..";main]")

			if on_rightclick_addendum_left then
				on_rightclick_addendum_left(pos, node, clicker)
			end

			player_chest_open(clicker, pos, left_name, left_textures, node.param2, true, "default_chest", "mcl_chests_chest")
		end,
		mesecons = mesecons,
		on_rotate = no_rotate,
	})

	minetest.register_node("mcl_chests:"..basename.."_right", {
		drawtype = "nodebox",
		paramtype = "light",
		paramtype2 = "facedir",
		node_box = {
			type = "fixed",
			fixed = {-0.5, -0.5, -0.4375, 0.4375, 0.375, 0.4375},
		},
		tiles = {"mcl_chests_blank.png"},
		use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
		groups = {handy=1,axey=1, container=6,not_in_creative_inventory=1, material_wood=1,flammable=-1,double_chest=2},
		drop = drop,
		is_ground_content = false,
		sounds = mcl_sounds.node_sound_wood_defaults(),
		on_construct = function(pos)
			local n = minetest.get_node(pos)
			local param2 = n.param2
			local p = get_double_container_neighbor_pos(pos, param2, "right")
			if not p or minetest.get_node(p).name ~= "mcl_chests:"..canonical_basename.."_left" then
				n.name = "mcl_chests:"..canonical_basename.."_small"
				minetest.swap_node(pos, n)
			end
		end,
		after_place_node = function(pos, placer, itemstack, pointed_thing)
			minetest.get_meta(pos):set_string("name", itemstack:get_meta():get_string("name"))
		end,
		on_destruct = function(pos)
			local n = minetest.get_node(pos)
			if n.name == small_name then
				return
			end

			close_forms(canonical_basename, pos)

			local param2 = n.param2
			local p = get_double_container_neighbor_pos(pos, param2, "right")
			if not p or minetest.get_node(p).name ~= "mcl_chests:"..basename.."_left" then
				return
			end
			close_forms(canonical_basename, p)

			minetest.swap_node(p, { name = small_name, param2 = param2 })
			create_entity(p, small_name, small_textures, param2, false, "default_chest", "mcl_chests_chest", "chest")
		end,
		after_dig_node = drop_items_chest,
		on_blast = on_chest_blast,
		allow_metadata_inventory_move = protection_check_move,
		allow_metadata_inventory_take = protection_check_put_take,
		allow_metadata_inventory_put = function(pos, listname, index, stack, player)
			local name = player:get_player_name()
			if minetest.is_protected(pos, name) then
				minetest.record_protection_violation(pos, name)
				return 0
			-- BEGIN OF LISTRING WORKAROUND
			elseif listname == "input" then
				local other_pos = get_double_container_neighbor_pos(pos, minetest.get_node(pos).param2, "right")
				local other_inv = minetest.get_inventory({type="node", pos=other_pos})
				local inv = minetest.get_inventory({type="node", pos=pos})
				--[[if other_inv:room_for_item("main", stack) then
					return -1
				else
					if inv:room_for_item("main", stack) then
						return -1
					else
						return 0
					end
				end--]]
				return limit_put(stack, other_inv, inv)
			-- END OF LISTRING WORKAROUND
			else
				return stack:get_count()
			end
		end,
		on_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
			minetest.log("action", player:get_player_name()..
					" moves stuff in chest at "..minetest.pos_to_string(pos))
		end,
		on_metadata_inventory_put = function(pos, listname, index, stack, player)
			minetest.log("action", player:get_player_name()..
					" moves stuff to chest at "..minetest.pos_to_string(pos))
			-- BEGIN OF LISTRING WORKAROUND
			if listname == "input" then
				local other_pos = get_double_container_neighbor_pos(pos, minetest.get_node(pos).param2, "right")
				local other_inv = minetest.get_inventory({type="node", pos=other_pos})
				local inv = minetest.get_inventory({type="node", pos=pos})

				inv:set_stack("input", 1, nil)

				double_chest_add_item(other_inv, inv, "main", stack)
			end
			-- END OF LISTRING WORKAROUND
		end,
		on_metadata_inventory_take = function(pos, listname, index, stack, player)
			minetest.log("action", player:get_player_name()..
					" takes stuff from chest at "..minetest.pos_to_string(pos))
		end,
		_mcl_blast_resistance = 2.5,
		_mcl_hardness = 2.5,

		on_rightclick = function(pos, node, clicker)
			local pos_other = get_double_container_neighbor_pos(pos, node.param2, "right")
			if minetest.registered_nodes[minetest.get_node({x = pos.x, y = pos.y + 1, z = pos.z}).name].groups.opaque == 1
				or minetest.registered_nodes[minetest.get_node({x = pos_other.x, y = pos_other.y + 1, z = pos_other.z}).name].groups.opaque == 1 then
					-- won't open if there is no space from the top
					return false
			end

			local name = minetest.get_meta(pos_other):get_string("name")
			if name == "" then
				name = minetest.get_meta(pos):get_string("name")
			end
			if name == "" then
				name = S("Large Chest")
			end

			minetest.show_formspec(clicker:get_player_name(),
			"mcl_chests:"..canonical_basename.."_"..pos.x.."_"..pos.y.."_"..pos.z,

			"size[9,11.5]"..
			"label[0,0;"..F(C("#313131", name)).."]"..
			"list[nodemeta:"..pos_other.x..","..pos_other.y..","..pos_other.z..";main;0,0.5;9,3;]"..
			mcl_formspec.get_itemslot_bg(0,0.5,9,3)..
			"list[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main;0,3.5;9,3;]"..
			mcl_formspec.get_itemslot_bg(0,3.5,9,3)..
			"label[0,7;"..F(C("#313131", S("Inventory"))).."]"..
			"list[current_player;main;0,7.5;9,3;9]"..
			mcl_formspec.get_itemslot_bg(0,7.5,9,3)..
			"list[current_player;main;0,10.75;9,1;]"..
			mcl_formspec.get_itemslot_bg(0,10.75,9,1)..
			-- BEGIN OF LISTRING WORKAROUND
			"listring[current_player;main]"..
			"listring[nodemeta:"..pos.x..","..pos.y..","..pos.z..";input]"..
			-- END OF LISTRING WORKAROUND
			"listring[current_player;main]"..
			"listring[nodemeta:"..pos_other.x..","..pos_other.y..","..pos_other.z..";main]"..
			"listring[current_player;main]"..
			"listring[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main]")

			if on_rightclick_addendum_right then
				on_rightclick_addendum_right(pos, node, clicker)
			end

			player_chest_open(clicker, pos_other, left_name, left_textures, node.param2, true, "default_chest", "mcl_chests_chest")
		end,
		mesecons = mesecons,
		on_rotate = no_rotate,
	})

	if mod_doc then
		doc.add_entry_alias("nodes", small_name, "nodes", "mcl_chests:"..basename.."_left")
		doc.add_entry_alias("nodes", small_name, "nodes", "mcl_chests:"..basename.."_right")
	end

	-- END OF register_chest FUNCTION BODY
end

local chestusage = S("To access its inventory, rightclick it. When broken, the items will drop out.")

register_chest("chest",
	S("Chest"),
	S("Chests are containers which provide 27 inventory slots. Chests can be turned into large chests with double the capacity by placing two chests next to each other."),
	chestusage,
	S("27 inventory slots") .. "\n" .. S("Can be combined to a large chest"),
	{
		small = {"mcl_chests_normal.png"},
		double = {"mcl_chests_normal_double.png"},
		inv = {"default_chest_top.png", "mcl_chests_chest_bottom.png",
		"mcl_chests_chest_right.png", "mcl_chests_chest_left.png",
		"mcl_chests_chest_back.png", "default_chest_front.png"},
		--[[left = {"default_chest_top_big.png", "default_chest_top_big.png",
		"mcl_chests_chest_right.png", "mcl_chests_chest_left.png",
		"default_chest_side_big.png^[transformFX", "default_chest_front_big.png"},
		right = {"default_chest_top_big.png^[transformFX", "default_chest_top_big.png^[transformFX",
		"mcl_chests_chest_right.png", "mcl_chests_chest_left.png",
		"default_chest_side_big.png", "default_chest_front_big.png^[transformFX"},]]--
	},
	false
)

local traptiles = {
	small = {"mcl_chests_trapped.png"},
	double = {"mcl_chests_trapped_double.png"},
	inv = {"mcl_chests_chest_trapped_top.png", "mcl_chests_chest_trapped_bottom.png",
	"mcl_chests_chest_trapped_right.png", "mcl_chests_chest_trapped_left.png",
	"mcl_chests_chest_trapped_back.png", "mcl_chests_chest_trapped_front.png"},
	--[[left = {"mcl_chests_chest_trapped_top_big.png", "mcl_chests_chest_trapped_top_big.png",
	"mcl_chests_chest_trapped_right.png", "mcl_chests_chest_trapped_left.png",
	"mcl_chests_chest_trapped_side_big.png^[transformFX", "mcl_chests_chest_trapped_front_big.png"},
	right = {"mcl_chests_chest_trapped_top_big.png^[transformFX", "mcl_chests_chest_trapped_top_big.png^[transformFX",
	"mcl_chests_chest_trapped_right.png", "mcl_chests_chest_trapped_left.png",
	"mcl_chests_chest_trapped_side_big.png", "mcl_chests_chest_trapped_front_big.png^[transformFX"},]]--
}

register_chest("trapped_chest",
	S("Trapped Chest"),
	S("A trapped chest is a container which provides 27 inventory slots. When it is opened, it sends a redstone signal to its adjacent blocks as long it stays open. Trapped chests can be turned into large trapped chests with double the capacity by placing two trapped chests next to each other."),
	chestusage,
	S("27 inventory slots") .. "\n" .. S("Can be combined to a large chest") .. "\n" .. S("Emits a redstone signal when opened"),
	traptiles,
	nil,
	{receptor = {
		state = mesecon.state.off,
		rules = trapped_chest_mesecons_rules,
	}},
	function(pos, node, clicker)
		minetest.swap_node(pos, {name="mcl_chests:trapped_chest_on_small", param2 = node.param2})
		find_or_create_entity(pos, "mcl_chests:trapped_chest_on_small", {"mcl_chests_trapped.png"}, node.param2, false, "default_chest", "mcl_chests_chest", "chest"):reinitialize("mcl_chests:trapped_chest_on_small")
		mesecon.receptor_on(pos, trapped_chest_mesecons_rules)
	end,
	function(pos, node, clicker)
		local meta = minetest.get_meta(pos)
		meta:set_int("players", 1)

		minetest.swap_node(pos, {name="mcl_chests:trapped_chest_on_left", param2 = node.param2})
		find_or_create_entity(pos, "mcl_chests:trapped_chest_on_left", {"mcl_chests_trapped_double.png"}, node.param2, true, "default_chest", "mcl_chests_chest", "chest"):reinitialize("mcl_chests:trapped_chest_on_left")
		mesecon.receptor_on(pos, trapped_chest_mesecons_rules)

		local pos_other = get_double_container_neighbor_pos(pos, node.param2, "left")
		minetest.swap_node(pos_other, {name="mcl_chests:trapped_chest_on_right", param2 = node.param2})
		mesecon.receptor_on(pos_other, trapped_chest_mesecons_rules)
	end,
	function(pos, node, clicker)
		local pos_other = get_double_container_neighbor_pos(pos, node.param2, "right")

		minetest.swap_node(pos, {name="mcl_chests:trapped_chest_on_right", param2 = node.param2})
		mesecon.receptor_on(pos, trapped_chest_mesecons_rules)

		minetest.swap_node(pos_other, {name="mcl_chests:trapped_chest_on_left", param2 = node.param2})
		find_or_create_entity(pos_other, "mcl_chests:trapped_chest_on_left", {"mcl_chests_trapped_double.png"}, node.param2, true, "default_chest", "mcl_chests_chest", "chest"):reinitialize("mcl_chests:trapped_chest_on_left")
		mesecon.receptor_on(pos_other, trapped_chest_mesecons_rules)
	end
)

register_chest("trapped_chest_on",
	nil, nil, nil, nil, traptiles, true,
	{receptor = {
		state = mesecon.state.on,
		rules = trapped_chest_mesecons_rules,
	}},
	nil, nil, nil,
	"trapped_chest",
	"trapped_chest"
)

-- Disable chest when it has been closed
minetest.register_on_player_receive_fields(function(player, formname, fields)
	if formname:find("mcl_chests:") == 1 then
		if fields.quit then
			player_chest_close(player)
		end
	end
end)

minetest.register_on_leaveplayer(function(player)
	player_chest_close(player)
end)

minetest.register_craft({
	output = "mcl_chests:chest",
	recipe = {
		{"group:wood", "group:wood", "group:wood"},
		{"group:wood", "", "group:wood"},
		{"group:wood", "group:wood", "group:wood"},
	}
})

minetest.register_craft({
	type = "fuel",
	recipe = "mcl_chests:chest",
	burntime = 15
})

minetest.register_craft({
	type = "fuel",
	recipe = "mcl_chests:trapped_chest",
	burntime = 15
})

minetest.register_node("mcl_chests:ender_chest", {
	description = S("Ender Chest"),
	_tt_help = S("27 interdimensional inventory slots") .. "\n" .. S("Put items inside, retrieve them from any ender chest"),
	_doc_items_longdesc = S("Ender chests grant you access to a single personal interdimensional inventory with 27 slots. This inventory is the same no matter from which ender chest you access it from. If you put one item into one ender chest, you will find it in all other ender chests. Each player will only see their own items, but not the items of other players."),
	_doc_items_usagehelp = S("Rightclick the ender chest to access your personal interdimensional inventory."),
	drawtype = "mesh",
	mesh = "mcl_chests_chest.obj",
	tiles = {"mcl_chests_ender.png"},
	use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "opaque" or false,
	paramtype = "light",
	paramtype2 = "facedir",
	stack_max = 64,
	groups = {deco_block=1},
	sounds = mcl_sounds.node_sound_stone_defaults(),
	on_construct = function(pos, node)
		local node = minetest.get_node(pos)
		node.name = "mcl_chests:ender_chest_small"
		minetest.set_node(pos, node)
	end,
})

local formspec_ender_chest = "size[9,8.75]"..
	"label[0,0;"..F(C("#313131", S("Ender Chest"))).."]"..
	"list[current_player;enderchest;0,0.5;9,3;]"..
	mcl_formspec.get_itemslot_bg(0,0.5,9,3)..
	"label[0,4.0;"..F(C("#313131", S("Inventory"))).."]"..
	"list[current_player;main;0,4.5;9,3;9]"..
	mcl_formspec.get_itemslot_bg(0,4.5,9,3)..
	"list[current_player;main;0,7.74;9,1;]"..
	mcl_formspec.get_itemslot_bg(0,7.74,9,1)..
	"listring[current_player;enderchest]"..
	"listring[current_player;main]"


minetest.register_node("mcl_chests:ender_chest_small", {
	description = S("Ender Chest"),
	_tt_help = S("27 interdimensional inventory slots") .. "\n" .. S("Put items inside, retrieve them from any ender chest"),
	_doc_items_longdesc = S("Ender chests grant you access to a single personal interdimensional inventory with 27 slots. This inventory is the same no matter from which ender chest you access it from. If you put one item into one ender chest, you will find it in all other ender chests. Each player will only see their own items, but not the items of other players."),
	_doc_items_usagehelp = S("Rightclick the ender chest to access your personal interdimensional inventory."),
	drawtype = "nodebox",
	node_box = {
		type = "fixed",
		fixed = {-0.4375, -0.5, -0.4375, 0.5, 0.375, 0.4375},
	},
	_chest_entity_textures = {"mcl_chests_ender.png"},
	_chest_entity_sound = "mcl_chests_enderchest",
	_chest_entity_mesh = "mcl_chests_chest",
	_chest_entity_animation_type = "chest",
	tiles = {"mcl_chests_blank.png"},
	use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
	--[[{"mcl_chests_ender_chest_top.png", "mcl_chests_ender_chest_bottom.png",
		"mcl_chests_ender_chest_right.png", "mcl_chests_ender_chest_left.png",
		"mcl_chests_ender_chest_back.png", "mcl_chests_ender_chest_front.png"},]]--
	-- Note: The “container” group is missing here because the ender chest does not
	-- have an inventory on its own
	groups = {pickaxey=1, deco_block=1, material_stone=1, chest_entity=1, not_in_creative_inventory=1},
	is_ground_content = false,
	paramtype = "light",
	light_source = 7,
	paramtype2 = "facedir",
	sounds = mcl_sounds.node_sound_stone_defaults(),
	drop = "mcl_core:obsidian 8",
	on_construct = function(pos)
		create_entity(pos, "mcl_chests:ender_chest_small", {"mcl_chests_ender.png"}, minetest.get_node(pos).param2, false, "mcl_chests_enderchest", "mcl_chests_chest", "chest")
	end,
	on_rightclick = function(pos, node, clicker)
		if minetest.registered_nodes[minetest.get_node({x = pos.x, y = pos.y + 1, z = pos.z}).name].groups.opaque == 1 then
				-- won't open if there is no space from the top
				return false
		end
		minetest.show_formspec(clicker:get_player_name(), "mcl_chests:ender_chest_"..clicker:get_player_name(), formspec_ender_chest)
		player_chest_open(clicker, pos, "mcl_chests:ender_chest_small", {"mcl_chests_ender.png"}, node.param2, false, "mcl_chests_enderchest", "mcl_chests_chest")
	end,
	on_receive_fields = function(pos, formname, fields, sender)
		if fields.quit then
			player_chest_close(sender)
		end
	end,
	_mcl_blast_resistance = 3000,
	_mcl_hardness = 22.5,
	_mcl_silk_touch_drop = {"mcl_chests:ender_chest"},
	on_rotate = simple_rotate,
})

minetest.register_on_joinplayer(function(player)
	local inv = player:get_inventory()
	inv:set_size("enderchest", 9*3)
end)

minetest.register_allow_player_inventory_action(function(player, action, inv, info)
	if inv:get_location().type == "player" and (
		   action == "move" and (info.from_list == "enderchest" or info.to_list == "enderchest")
		or action == "put"  and  info.listname  == "enderchest"
		or action == "take" and  info.listname  == "enderchest"
	) then
		local def = player:get_wielded_item():get_definition()

		if not minetest.find_node_near(player:get_pos(), def and def.range or ItemStack():get_definition().range, "mcl_chests:ender_chest_small", true) then
			return 0
		end
	end
end)

minetest.register_craft({
	output = "mcl_chests:ender_chest",
	recipe = {
		{"mcl_core:obsidian", "mcl_core:obsidian", "mcl_core:obsidian"},
		{"mcl_core:obsidian", "mcl_end:ender_eye", "mcl_core:obsidian"},
		{"mcl_core:obsidian", "mcl_core:obsidian", "mcl_core:obsidian"},
	}
})

-- Shulker boxes
local boxtypes = {
	white = S("White Shulker Box"),
	grey = S("Light Grey Shulker Box"),
	orange = S("Orange Shulker Box"),
	cyan = S("Cyan Shulker Box"),
	magenta = S("Magenta Shulker Box"),
	violet = S("Purple Shulker Box"),
	lightblue = S("Light Blue Shulker Box"),
	blue = S("Blue Shulker Box"),
	yellow = S("Yellow Shulker Box"),
	brown = S("Brown Shulker Box"),
	green = S("Lime Shulker Box"),
	dark_green = S("Green Shulker Box"),
	pink = S("Pink Shulker Box"),
	red = S("Red Shulker Box"),
	dark_grey = S("Grey Shulker Box"),
	black = S("Black Shulker Box"),
}

local shulker_mob_textures = {
	white = "mobs_mc_shulker_white.png",
	grey = "mobs_mc_shulker_silver.png",
	orange = "mobs_mc_shulker_orange.png",
	cyan = "mobs_mc_shulker_cyan.png",
	magenta = "mobs_mc_shulker_magenta.png",
	violet = "mobs_mc_shulker_purple.png",
	lightblue = "mobs_mc_shulker_light_blue.png",
	blue = "mobs_mc_shulker_blue.png",
	yellow = "mobs_mc_shulker_yellow.png",
	brown = "mobs_mc_shulker_brown.png",
	green = "mobs_mc_shulker_lime.png",
	dark_green = "mobs_mc_shulker_green.png",
	pink = "mobs_mc_shulker_pink.png",
	red = "mobs_mc_shulker_red.png",
	dark_grey = "mobs_mc_shulker_gray.png",
	black = "mobs_mc_shulker_black.png",
}
local canonical_shulker_color = "violet"

local function formspec_shulker_box(name)
	if name == "" then
		name = S("Shulker Box")
	end
	return "size[9,8.75]"..
	"label[0,0;"..F(C("#313131", name)).."]"..
	"list[context;main;0,0.5;9,3;]"..
	mcl_formspec.get_itemslot_bg(0,0.5,9,3)..
	"label[0,4.0;"..F(C("#313131", S("Inventory"))).."]"..
	"list[current_player;main;0,4.5;9,3;9]"..
	mcl_formspec.get_itemslot_bg(0,4.5,9,3)..
	"list[current_player;main;0,7.74;9,1;]"..
	mcl_formspec.get_itemslot_bg(0,7.74,9,1)..
	"listring[context;main]"..
	"listring[current_player;main]"
end

local function set_shulkerbox_meta(nmeta, imeta)
	local name = imeta:get_string("name")
	nmeta:set_string("description", imeta:get_string("description"))
	nmeta:set_string("name", name)
	nmeta:set_string("formspec", formspec_shulker_box(name))
end

for color, desc in pairs(boxtypes) do
	local mob_texture = shulker_mob_textures[color]
	local is_canonical = color == canonical_shulker_color
	local longdesc, usagehelp, create_entry, entry_name
	if mod_doc then
		if is_canonical then
			longdesc = S("A shulker box is a portable container which provides 27 inventory slots for any item except shulker boxes. Shulker boxes keep their inventory when broken, so shulker boxes as well as their contents can be taken as a single item. Shulker boxes come in many different colors.")
			usagehelp = S("To access the inventory of a shulker box, place and right-click it. To take a shulker box and its contents with you, just break and collect it, the items will not fall out. Place the shulker box again to be able to retrieve its contents.")
			entry_name = S("Shulker Box")
		else
			create_entry = false
		end
	end

	local small_name = "mcl_chests:"..color.."_shulker_box_small"

	minetest.register_node("mcl_chests:"..color.."_shulker_box", {
		description = desc,
		_tt_help = S("27 inventory slots") .. "\n" .. S("Can be carried around with its contents"),
		_doc_items_create_entry = create_entry,
		_doc_items_entry_name = entry_name,
		_doc_items_longdesc = longdesc,
		_doc_items_usagehelp = usagehelp,
		tiles = {mob_texture},
		use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "opaque" or false,
		drawtype = "mesh",
		mesh = "mcl_chests_shulker.obj",
		--[["mcl_chests_"..color.."_shulker_box_top.png", -- top
			"[combine:16x16:-32,-28="..mob_texture, -- bottom
			"[combine:16x16:0,-36="..mob_texture..":0,-16="..mob_texture, -- side
			"[combine:16x16:-32,-36="..mob_texture..":-32,-16="..mob_texture, -- side
			"[combine:16x16:-16,-36="..mob_texture..":-16,-16="..mob_texture, -- side
			"[combine:16x16:-48,-36="..mob_texture..":-48,-16="..mob_texture, -- side]]--
		groups = {handy=1,pickaxey=1, container=3, deco_block=1, dig_by_piston=1, shulker_box=1, old_shulker_box_node=1},
		is_ground_content = false,
		sounds = mcl_sounds.node_sound_stone_defaults(),
		stack_max = 1,
		drop = "",
		paramtype = "light",
		paramtype2 = "facedir",
		on_construct = function(pos)
			local node = minetest.get_node(pos)
			node.name = small_name
			minetest.set_node(pos, node)
		end,
		after_place_node = function(pos, placer, itemstack, pointed_thing)
			local nmeta = minetest.get_meta(pos)
			local imetadata = itemstack:get_metadata()
			local iinv_main = minetest.deserialize(imetadata)
			local ninv = nmeta:get_inventory()
			ninv:set_list("main", iinv_main)
			ninv:set_size("main", 9*3)
			set_shulkerbox_meta(nmeta, itemstack:get_meta())

			if minetest.is_creative_enabled(placer:get_player_name()) then
				if not ninv:is_empty("main") then
					return nil
				else
					return itemstack
				end
			else
				return nil
			end
		end,
		_on_dispense = function(stack, pos, droppos, dropnode, dropdir)
			-- Place shulker box as node
			if minetest.registered_nodes[dropnode.name].buildable_to then
				minetest.set_node(droppos, {name = small_name, param2 = minetest.dir_to_facedir(dropdir)})
				local ninv = minetest.get_inventory({type="node", pos=droppos})
				local imetadata = stack:get_metadata()
				local iinv_main = minetest.deserialize(imetadata)
				ninv:set_list("main", iinv_main)
				ninv:set_size("main", 9*3)
				set_shulkerbox_meta(minetest.get_meta(droppos), stack:get_meta())
				stack:take_item()
			end
			return stack
		end,
	})

	minetest.register_node(small_name, {
		description = desc,
		_tt_help = S("27 inventory slots") .. "\n" .. S("Can be carried around with its contents"),
		_doc_items_create_entry = create_entry,
		_doc_items_entry_name = entry_name,
		_doc_items_longdesc = longdesc,
		_doc_items_usagehelp = usagehelp,
		drawtype = "nodebox",
		tiles = {"mcl_chests_blank.png"},
		use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "clip" or true,
		_chest_entity_textures = {mob_texture},
		_chest_entity_sound = "mcl_chests_shulker",
		_chest_entity_mesh = "mcl_chests_shulker",
		_chest_entity_animation_type = "shulker",
		groups = {handy=1,pickaxey=1, container=3, deco_block=1, dig_by_piston=1, shulker_box=1, chest_entity=1, not_in_creative_inventory=1},
		is_ground_content = false,
		sounds = mcl_sounds.node_sound_stone_defaults(),
		stack_max = 1,
		drop = "",
		paramtype = "light",
		paramtype2 = "facedir",
--		TODO: Make shulker boxes rotatable
--		This doesn't work, it just destroys the inventory:
--		on_place = minetest.rotate_node,
		on_construct = function(pos)
			local meta = minetest.get_meta(pos)
			meta:set_string("formspec", formspec_shulker_box(nil))
			local inv = meta:get_inventory()
			inv:set_size("main", 9*3)
			create_entity(pos, small_name, {mob_texture}, minetest.get_node(pos).param2, false, "mcl_chests_shulker", "mcl_chests_shulker", "shulker")
		end,
		after_place_node = function(pos, placer, itemstack, pointed_thing)
			local nmeta = minetest.get_meta(pos)
			local imetadata = itemstack:get_metadata()
			local iinv_main = minetest.deserialize(imetadata)
			local ninv = nmeta:get_inventory()
			ninv:set_list("main", iinv_main)
			ninv:set_size("main", 9*3)
			set_shulkerbox_meta(nmeta, itemstack:get_meta())

			if minetest.is_creative_enabled(placer:get_player_name()) then
				if not ninv:is_empty("main") then
					return nil
				else
					return itemstack
				end
			else
				return nil
			end
		end,
		on_rightclick = function(pos, node, clicker)
			 player_chest_open(clicker, pos, small_name, {mob_texture}, node.param2, false, "mcl_chests_shulker", "mcl_chests_shulker", true)
		end,
		on_receive_fields = function(pos, formname, fields, sender)
			if fields.quit then
				player_chest_close(sender)
			end
		end,
		on_destruct = function(pos)
			local meta = minetest.get_meta(pos)
			local inv = meta:get_inventory()
			local items = {}
			for i=1, inv:get_size("main") do
				local stack = inv:get_stack("main", i)
				items[i] = stack:to_string()
			end
			local data = minetest.serialize(items)
			local boxitem = ItemStack("mcl_chests:"..color.."_shulker_box")
			local boxitem_meta = boxitem:get_meta()
			boxitem_meta:set_string("description", meta:get_string("description"))
			boxitem_meta:set_string("name", meta:get_string("name"))
			boxitem:set_metadata(data)

			if minetest.is_creative_enabled("") then
				if not inv:is_empty("main") then
					minetest.add_item(pos, boxitem)
				end
			else
				minetest.add_item(pos, boxitem)
			end
		end,
		allow_metadata_inventory_move = protection_check_move,
		allow_metadata_inventory_take = protection_check_put_take,
		allow_metadata_inventory_put = function(pos, listname, index, stack, player)
			local name = player:get_player_name()
			if minetest.is_protected(pos, name) then
				minetest.record_protection_violation(pos, name)
				return 0
			end
			-- Do not allow to place shulker boxes into shulker boxes
			local group = minetest.get_item_group(stack:get_name(), "shulker_box")
			if group == 0 or group == nil then
				return stack:get_count()
			else
				return 0
			end
		end,
		_mcl_blast_resistance = 6,
		_mcl_hardness = 2,
	})

	if mod_doc and not is_canonical then
		doc.add_entry_alias("nodes", "mcl_chests:"..canonical_shulker_color.."_shulker_box", "nodes", "mcl_chests:"..color.."_shulker_box")
		doc.add_entry_alias("nodes", "mcl_chests:"..canonical_shulker_color.."_shulker_box_small", "nodes", "mcl_chests:"..color.."_shulker_box_small")
	end

	minetest.register_craft({
		type = "shapeless",
		output = "mcl_chests:"..color.."_shulker_box",
		recipe = { "group:shulker_box", "mcl_dye:"..color }
	})
end

minetest.register_craft({
	output = "mcl_chests:violet_shulker_box",
	recipe = {
		{"mcl_mobitems:shulker_shell"},
		{"mcl_chests:chest"},
		{"mcl_mobitems:shulker_shell"},
	}
})

-- Save metadata of shulker box when used in crafting
minetest.register_on_craft(function(itemstack, player, old_craft_grid, craft_inv)
	if minetest.get_item_group(itemstack:get_name(), "shulker_box") ~= 1 then
		return
	end
	local original
	for i = 1, #old_craft_grid do
		local item = old_craft_grid[i]:get_name()
		if minetest.get_item_group(item, "shulker_box") == 1 then
			original = old_craft_grid[i]
			break
		end
	end
	if original then
		local ometa = original:get_meta():to_table()
		local nmeta = itemstack:get_meta()
		nmeta:from_table(ometa)
		return itemstack
	end
end)

local function select_and_spawn_entity(pos, node)
	local node_name = node.name
	local node_def = minetest.registered_nodes[node_name]
	local double_chest = minetest.get_item_group(node_name, "double_chest") > 0
	find_or_create_entity(pos, node_name, node_def._chest_entity_textures, node.param2, double_chest, node_def._chest_entity_sound, node_def._chest_entity_mesh, node_def._chest_entity_animation_type)
end

minetest.register_lbm({
	label = "Spawn Chest entities",
	name = "mcl_chests:spawn_chest_entities",
	nodenames = {"group:chest_entity"},
	run_at_every_load = true,
	action = select_and_spawn_entity,
})

minetest.register_lbm({
	label = "Replace old chest nodes",
	name = "mcl_chests:replace_old",
	nodenames = {"mcl_chests:chest", "mcl_chests:trapped_chest", "mcl_chests:trapped_chest_on", "mcl_chests:ender_chest", "group:old_shulker_box_node"},
	run_at_every_load = true,
	action = function(pos, node)
		local node_name = node.name
		node.name = node_name .. "_small"
		minetest.swap_node(pos, node)
		select_and_spawn_entity(pos, node)
		if node_name == "mcl_chests:trapped_chest_on" then
			minetest.log("action", "[mcl_chests] Disabled active trapped chest on load: " ..minetest.pos_to_string(pos))
			chest_update_after_close(pos)
		elseif node_name == "mcl_chests:ender_chest" then
			local meta = minetest.get_meta(pos)
			meta:set_string("formspec", formspec_ender_chest)
		end
	end
})

minetest.register_lbm({
	-- Disable active/open trapped chests when loaded because nobody could
	-- have them open at loading time.
	-- Fixes redstone weirdness.
	label = "Disable active trapped chests",
	name = "mcl_chests:reset_trapped_chests",
	nodenames = { "mcl_chests:trapped_chest_on_small", "mcl_chests:trapped_chest_on_left", "mcl_chests:trapped_chest_on_right" },
	run_at_every_load = true,
	action = function(pos, node)
		minetest.log("action", "[mcl_chests] Disabled active trapped chest on load: " ..minetest.pos_to_string(pos))
		chest_update_after_close(pos)
	end,
})

minetest.register_lbm({
	label = "Update shulker box formspecs (0.60.0)",
	name = "mcl_chests:update_shulker_box_formspecs_0_60_0",
	nodenames = { "group:shulker_box" },
	run_at_every_load = false,
	action = function(pos, node)
		local meta = minetest.get_meta(pos)
		meta:set_string("formspec", formspec_shulker_box)
	end,
})

minetest.register_lbm({
	label = "Upgrade old ender chest formspec",
	name = "mcl_chests:replace_old_ender_form",
	nodenames = {"mcl_chests:ender_chest_small"},
	run_at_every_load = false,
	action = function(pos, node)
		minetest.get_meta(pos):set_string("formspec", "")
	end,
})

local function barrel_open(pos, node, clicker)
	local name = minetest.get_meta(pos):get_string("name")

	if name == "" then
		name = S("Barrel")
	end

	local playername = clicker:get_player_name()

	minetest.show_formspec(playername,
		"mcl_chests:barrel_"..pos.x.."_"..pos.y.."_"..pos.z,
		table.concat({
			"size[9,8.75]",
			"label[0,0;"..F(C("#313131", name)).."]",
			"list[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main;0,0.5;9,3;]",
			mcl_formspec.get_itemslot_bg(0, 0.5, 9, 3),
			"label[0,4.0;"..F(C("#313131", S("Inventory"))).."]",
			"list[current_player;main;0,4.5;9,3;9]",
			mcl_formspec.get_itemslot_bg(0, 4.5, 9, 3),
			"list[current_player;main;0,7.74;9,1;]",
			mcl_formspec.get_itemslot_bg(0, 7.74, 9, 1),
			"listring[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main]",
			"listring[current_player;main]",
		})
	)

	minetest.swap_node(pos,	{ name = "mcl_chests:barrel_open", param2 = node.param2 })
	player_chest_open(clicker, pos, "mcl_chests:barrel")
end

minetest.register_node("mcl_chests:barrel", {
	description = S("Barrel"),
	_tt_help = S("27 inventory slots"),
	_doc_items_longdesc = S("Barrels are containers which provide 27 inventory slots."),
	_doc_items_usagehelp = S("To access its inventory, rightclick it. When broken, the items will drop out."),
	tiles = {"mcl_barrels_barrel_top.png", "mcl_barrels_barrel_bottom.png", "mcl_barrels_barrel_side.png"},
	paramtype = "light",
	paramtype2 = "facedir",
	on_place = function(itemstack, placer, pointed_thing)
		minetest.rotate_and_place(itemstack, placer, pointed_thing, minetest.is_creative_enabled(placer:get_player_name()), {}, false)
		return itemstack
	end,
	stack_max = 64,
	sounds = mcl_sounds.node_sound_wood_defaults(),
	groups = {handy = 1, axey = 1, container = 2, material_wood = 1, flammable = -1, deco_block = 1},
	on_construct = function(pos)
		local meta = minetest.get_meta(pos)
		local inv = meta:get_inventory()
		inv:set_size("main", 9*3)
	end,
	after_place_node = function(pos, placer, itemstack, pointed_thing)
		minetest.get_meta(pos):set_string("name", itemstack:get_meta():get_string("name"))
	end,
	after_dig_node = drop_items_chest,
	on_blast = on_chest_blast,
	on_rightclick = barrel_open,
	on_destruct = function(pos)
		close_forms("barrel", pos)
	end,
	_mcl_blast_resistance = 2.5,
	_mcl_hardness = 2.5,
})

minetest.register_node("mcl_chests:barrel_open", {
	description = S("Barrel Open"),
	_tt_help = S("27 inventory slots"),
	_doc_items_longdesc = S("Barrels are containers which provide 27 inventory slots."),
	_doc_items_usagehelp = S("To access its inventory, rightclick it. When broken, the items will drop out."),
	_doc_items_create_entry = false,
	tiles = {"mcl_barrels_barrel_top_open.png", "mcl_barrels_barrel_bottom.png", "mcl_barrels_barrel_side.png"},
	paramtype = "light",
	paramtype2 = "facedir",
	drop = "mcl_chests:barrel",
	stack_max = 64,
	sounds = mcl_sounds.node_sound_wood_defaults(),
	groups = {handy = 1, axey = 1, container = 2, material_wood = 1, flammable = -1, deco_block = 1, not_in_creative_inventory = 1},
	after_dig_node = drop_items_chest,
	on_blast = on_chest_blast,
	on_rightclick = barrel_open,
	on_destruct = function(pos)
		close_forms("barrel_open", pos)
	end,
	_mcl_blast_resistance = 2.5,
	_mcl_hardness = 2.5,
})

--Minecraft Java Edition craft
minetest.register_craft({
	output = "mcl_chests:barrel",
	recipe = {
		{"group:wood", "group:wood_slab", "group:wood"},
		{"group:wood", "",                "group:wood"},
		{"group:wood", "group:wood_slab", "group:wood"},
	}
})
