minetest.register_node("digiline_global_memory:controller", {
	description = "Digiline global memory controller",
	groups = { cracky = 3 },
	is_ground_content = false,

	after_place_node = function(pos, placer)
		local meta = minetest.get_meta(pos)
		-- default digiline channel
		meta:set_string("channel", "global_memory")
		meta:set_string("owner", placer:get_player_name() or "")
		meta:set_string("formspec","field[channel;Channel;${channel}")
	end,

	tiles = {
		"global_memory_controller_top.png",
		"jeija_microcontroller_bottom.png",
		"jeija_microcontroller_sides.png",
		"jeija_microcontroller_sides.png",
		"jeija_microcontroller_sides.png",
		"jeija_microcontroller_sides.png"
	},

	inventory_image = "global_memory_controller_top.png",
	drawtype = "nodebox",
	selection_box = {
		--From luacontroller
		type = "fixed",
		fixed = { -8/16, -8/16, -8/16, 8/16, -5/16, 8/16 },
	},
	node_box = {
		--From Luacontroller
		type = "fixed",
		fixed = {
			{ -8/16, -8/16, -8/16, 8/16, -7/16, 8/16 }, -- Bottom slab
			{ -5/16, -7/16, -5/16, 5/16, -6/16, 5/16 }, -- Circuit board
			{ -3/16, -6/16, -3/16, 3/16, -5/16, 3/16 }, -- IC
		}
	},

	paramtype = "light",
	sunlight_propagates = true,

	on_receive_fields = function(pos, _, fields, sender)
		local name = sender:get_player_name()
		if minetest.is_protected(pos, name)
			and not minetest.check_player_privs(name, { protection_bypass = true })
		then
			minetest.record_protection_violation(pos, name)
			return
		end

		local meta = minetest.get_meta(pos)
		if fields.channel then
			-- setchannel on submit
			meta:set_string("channel", fields.channel)
		end
	end,

	digiline = {
		receptor = {},
		effector = {
			action = function(pos, _, channel, msg)
				local meta = minetest.get_meta(pos)
				if meta:get_string("channel") ~= channel then
					return
				end

				if not (type(msg) == "table" and msg.command and msg.name) then
					return
				end

				local owner = meta:get_string("owner")

				-- read
				if msg.command == "GET" then
					local value = digiline_global_memory.get_value(owner, msg.name)
					digiline:receptor_send(pos, digiline.rules.default, channel, value)

				-- write
				elseif msg.command == "SET" then
					local success, err_msg, err_code = digiline_global_memory.set_value(owner, msg.name, msg.value)
					digiline:receptor_send(pos, digiline.rules.default, channel, {
						success = success,
						message = err_msg,
						code = err_code
					})

				-- increment
				elseif msg.command == "INC" then
					local new_value = digiline_global_memory.inc_value(owner, msg.name, msg.value)
					digiline:receptor_send(pos, digiline.rules.default, channel, new_value)
				end
			end
		}
	}
})

-- NOTE: uses the digistuff eeprom as ingredient (not a dependency)
minetest.register_craft({
	output = "digiline_global_memory:controller",
	recipe = {
		{ "digistuff:eeprom", "digilines:wire_std_00000000", "digistuff:eeprom" },
		{ "digistuff:eeprom", "digilines:wire_std_00000000", "digistuff:eeprom" },
		{ "digistuff:eeprom", "digilines:wire_std_00000000", "digistuff:eeprom" },
	}
})