local armor_stand_formspec = "size[8,7]" ..
	default.gui_bg ..
	default.gui_bg_img ..
	default.gui_slots ..
	default.get_hotbar_bg(0,3) ..
	"list[current_name;armor_head;3,0.5;1,1;]" ..
	"list[current_name;armor_torso;4,0.5;1,1;]" ..
	"list[current_name;armor_legs;3,1.5;1,1;]" ..
	"list[current_name;armor_feet;4,1.5;1,1;]" ..
	"image[3,0.5;1,1;3d_armor_stand_head.png]" ..
	"image[4,0.5;1,1;3d_armor_stand_torso.png]" ..
	"image[3,1.5;1,1;3d_armor_stand_legs.png]" ..
	"image[4,1.5;1,1;3d_armor_stand_feet.png]" ..
	"list[current_player;main;0,3;8,1;]" ..
	"list[current_player;main;0,4.25;8,3;8]"

local elements = {"head", "torso", "legs", "feet"}

local function get_stand_object(pos)
	local object = nil
	local objects = minetest.get_objects_inside_radius(pos, 0.5) or {}
	for _, obj in pairs(objects) do
		local ent = obj:get_luaentity()
		if ent then
			if ent.name == "3d_armor_stand:armor_entity" then
				-- Remove duplicates
				if object then
					obj:remove()
				else
					object = obj
				end
			end
		end
	end
	return object
end

local function update_entity(pos)
	local node = minetest.get_node(pos)
	local object = get_stand_object(pos)
	if object then
		if not string.find(node.name, "3d_armor_stand:") then
			object:remove()
			return
		end
	else
		object = minetest.add_entity(pos, "3d_armor_stand:armor_entity")
	end
	if object then
		local texture = "3d_armor_trans.png"
		local textures = {}
		local meta = minetest.get_meta(pos)
		local inv = meta:get_inventory()
		local yaw = 0
		if inv then
			for _, element in pairs(elements) do
				local stack = inv:get_stack("armor_"..element, 1)
				if stack:get_count() == 1 then
					local item = stack:get_name() or ""
					local def = stack:get_definition() or {}
					local groups = def.groups or {}
					if groups["armor_"..element] then
						local texture = def.texture or item:gsub("%:", "_")
						table.insert(textures, texture..".png")
					end
				end
			end
		end
		if #textures > 0 then
			texture = table.concat(textures, "^")
		end
		if node.param2 then
			local rot = node.param2 % 4
			if rot == 1 then
				yaw = 3 * math.pi / 2
			elseif rot == 2 then
				yaw = math.pi
			elseif rot == 3 then
				yaw = math.pi / 2
			end
		end
		object:setyaw(yaw)
		object:set_properties({textures={texture}})
	end
end

local function has_locked_armor_stand_privilege(meta, player)
	local name = ""
	if player then
		if minetest.check_player_privs(player, "protection_bypass") then
			return true
		end
		name = player:get_player_name()
	end
	if name ~= meta:get_string("owner") then
		return false
	end
	return true
end

local function add_hidden_node(pos, player)
	local p = {x=pos.x, y=pos.y + 1, z=pos.z}
	local name = player:get_player_name()
	local node = minetest.get_node(p)
	if node.name == "air" and not minetest.is_protected(pos, name) then
		minetest.set_node(p, {name="3d_armor_stand:top"})
	end
end

local function remove_hidden_node(pos)
	local p = {x=pos.x, y=pos.y + 1, z=pos.z}
	local node = minetest.get_node(p)
	if node.name == "3d_armor_stand:top" then
		minetest.remove_node(p)
	end
end

minetest.register_node("3d_armor_stand:top", {
	description = "Armor stand top",
	paramtype = "light",
	drawtype = "plantlike",
	sunlight_propagates = true,
	walkable = true,
	pointable = false,
	diggable = false,
	buildable_to = false,
	drop = "",
	groups = {not_in_creative_inventory = 1},
	on_blast = function() end,
	tiles = {"3d_armor_trans.png"},
})

minetest.register_node("3d_armor_stand:armor_stand", {
	description = "Armor stand",
	drawtype = "mesh",
	mesh = "3d_armor_stand.obj",
	tiles = {"3d_armor_stand.png"},
	paramtype = "light",
	paramtype2 = "facedir",
	walkable = false,
	selection_box = {
		type = "fixed",
		fixed = {-0.5,-0.5,-0.5, 0.5,1.4,0.5}
	},
	groups = {choppy=2, oddly_breakable_by_hand=2},
	sounds = default.node_sound_wood_defaults(),
	on_construct = function(pos)
		local meta = minetest.get_meta(pos)
		meta:set_string("formspec", armor_stand_formspec)
		meta:set_string("infotext", "Armor Stand")
		local inv = meta:get_inventory()
		for _, element in pairs(elements) do
			inv:set_size("armor_"..element, 1)
		end
	end,
	can_dig = function(pos, player)
		local meta = minetest.get_meta(pos)
		local inv = meta:get_inventory()
		for _, element in pairs(elements) do
			if not inv:is_empty("armor_"..element) then
				return false
			end
		end
		return true
	end,
	after_place_node = function(pos, placer)
		minetest.add_entity(pos, "3d_armor_stand:armor_entity")
		add_hidden_node(pos, placer)
	end,
	allow_metadata_inventory_put = function(pos, listname, index, stack)
		local def = stack:get_definition() or {}
		local groups = def.groups or {}
		if groups[listname] then
			return 1
		end
		return 0
	end,
	allow_metadata_inventory_move = function(pos)
		return 0
	end,
	on_metadata_inventory_put = function(pos)
		update_entity(pos)
	end,
	on_metadata_inventory_take = function(pos)
		update_entity(pos)
	end,
	after_destruct = function(pos)
		update_entity(pos)
		remove_hidden_node(pos)
	end,
	on_blast = function(pos)
		local object = get_stand_object(pos)
		if object then
			object:remove()
		end
		minetest.after(1, function(pos)
			update_entity(pos)
		end, pos)
	end,
})

minetest.register_node("3d_armor_stand:locked_armor_stand", {
	description = "Locked Armor stand",
	drawtype = "mesh",
	mesh = "3d_armor_stand.obj",
	tiles = {"3d_armor_stand_locked.png"},
	paramtype = "light",
	paramtype2 = "facedir",
	walkable = false,
	selection_box = {
		type = "fixed",
		fixed = {-0.5,-0.5,-0.5, 0.5,1.4,0.5}
	},
	groups = {choppy=2, oddly_breakable_by_hand=2},
	sounds = default.node_sound_wood_defaults(),
	on_construct = function(pos)
		local meta = minetest.get_meta(pos)
		meta:set_string("formspec", armor_stand_formspec)
		meta:set_string("infotext", "Armor Stand")
		meta:set_string("owner", "")
		local inv = meta:get_inventory()
		for _, element in pairs(elements) do
			inv:set_size("armor_"..element, 1)
		end
	end,
	can_dig = function(pos, player)
		local meta = minetest.get_meta(pos)
		local inv = meta:get_inventory()
		for _, element in pairs(elements) do
			if not inv:is_empty("armor_"..element) then
				return false
			end
		end
		return true
	end,
	after_place_node = function(pos, placer)
		minetest.add_entity(pos, "3d_armor_stand:armor_entity")
		local meta = minetest.get_meta(pos)
		meta:set_string("owner", placer:get_player_name() or "")
		meta:set_string("infotext", "Armor Stand (owned by " ..
		meta:get_string("owner") .. ")")
		add_hidden_node(pos, placer)
	end,
	allow_metadata_inventory_put = function(pos, listname, index, stack, player)
		local meta = minetest.get_meta(pos)
		if not has_locked_armor_stand_privilege(meta, player) then
			return 0
		end
		local def = stack:get_definition() or {}
		local groups = def.groups or {}
		if groups[listname] then
			return 1
		end
		return 0
	end,
	allow_metadata_inventory_take = function(pos, listname, index, stack, player)
		local meta = minetest.get_meta(pos)
		if not has_locked_armor_stand_privilege(meta, player) then
			return 0
		end
		return stack:get_count()
	end,
	allow_metadata_inventory_move = function(pos)
		return 0
	end,
	on_metadata_inventory_put = function(pos)
		update_entity(pos)
	end,
	on_metadata_inventory_take = function(pos)
		update_entity(pos)
	end,
	after_destruct = function(pos)
		update_entity(pos)
		remove_hidden_node(pos)
	end,
	on_blast = function(pos)
		local object = get_stand_object(pos)
		if object then
			object:remove()
		end
		minetest.after(1, function(pos)
			update_entity(pos)
		end, pos)
	end,
})

minetest.register_entity("3d_armor_stand:armor_entity", {
	physical = true,
	visual = "mesh",
	mesh = "3d_armor_entity.obj",
	visual_size = {x=1, y=1},
	collisionbox = {-0.1,-0.4,-0.1, 0.1,1.3,0.1},
	textures = {"3d_armor_trans.png"},
	pos = nil,
	timer = 0,
	on_activate = function(self)
		local pos = self.object:getpos()
		if pos then
			self.pos = vector.round(pos)
			update_entity(pos)
		end
	end,
	on_step = function(self, dtime)
		if not self.pos then
			return
		end
		self.timer = self.timer + dtime
		if self.timer > 1 then
			self.timer = 0
			local pos = self.object:getpos()
			if pos then
				if vector.equals(vector.round(pos), self.pos) then
					return
				end
			end
			update_entity(self.pos)
			self.object:remove()
		end
	end,
})

minetest.register_craft({
	output = "3d_armor_stand:armor_stand",
	recipe = {
		{"", "default:fence_wood", ""},
		{"", "default:fence_wood", ""},
		{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
	}
})

minetest.register_craft({
	output = "3d_armor_stand:locked_armor_stand",
	recipe = {
		{"3d_armor_stand:armor_stand", "default:steel_ingot"},
	}
})