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-- Technic CNC v1.0 by kpoppel
-- Based on the NonCubic Blocks MOD v1.4 by yves_de_beck

-- Idea:
--   Somehow have a tabbed/paged panel if the number of shapes should expand
--   beyond what is available in the panel today.
--   I could imagine some form of API allowing modders to come with their own node
--   box definitions and easily stuff it in the this machine for production.

local S = technic.getter


minetest.register_craft({
	output = 'technic:cnc',
	recipe = {
		{'default:glass',              'technic:diamond_drill_head', 'default:glass'},
		{'technic:control_logic_unit', 'technic:machine_casing',     'basic_materials:motor'},
		{'technic:carbon_steel_ingot', 'technic:lv_cable',           'technic:carbon_steel_ingot'},
	},
})


local shape = {}
local onesize_products = {
	slope                    = 2,
	slope_edge               = 1,
	slope_inner_edge         = 1,
	pyramid                  = 2,
	spike                    = 1,
	cylinder                 = 2,
	oblate_spheroid          = 1,
	sphere                   = 1,
	stick                    = 8,
	slope_upsdown            = 2,
	slope_edge_upsdown       = 1,
	slope_inner_edge_upsdown = 1,
	cylinder_horizontal      = 2,
	slope_lying              = 2,
	onecurvededge            = 1,
	twocurvededge            = 1,
}
local twosize_products = {
	element_straight         = 4,
	element_end              = 2,
	element_cross            = 1,
	element_t                = 1,
	element_edge             = 2,
}

local cnc_formspec =
	"size[9,11;]"..
	"label[1,0;"..S("Choose Milling Program:").."]"..
	"image_button[1,0.5;1,1;technic_cnc_slope.png;slope; ]"..
	"image_button[2,0.5;1,1;technic_cnc_slope_edge.png;slope_edge; ]"..
	"image_button[3,0.5;1,1;technic_cnc_slope_inner_edge.png;slope_inner_edge; ]"..
	"image_button[4,0.5;1,1;technic_cnc_pyramid.png;pyramid; ]"..
	"image_button[5,0.5;1,1;technic_cnc_spike.png;spike; ]"..
	"image_button[6,0.5;1,1;technic_cnc_cylinder.png;cylinder; ]"..
	"image_button[7,0.5;1,1;technic_cnc_oblate_spheroid.png;oblate_spheroid; ]"..
	"image_button[8,0.5;1,1;technic_cnc_stick.png;stick; ]"..

	"image_button[1,1.5;1,1;technic_cnc_slope_upsdwn.png;slope_upsdown; ]"..
	"image_button[2,1.5;1,1;technic_cnc_slope_edge_upsdwn.png;slope_edge_upsdown; ]"..
	"image_button[3,1.5;1,1;technic_cnc_slope_inner_edge_upsdwn.png;slope_inner_edge_upsdown; ]"..
	"image_button[4,1.5;1,1;technic_cnc_cylinder_horizontal.png;cylinder_horizontal; ]"..
	"image_button[5,1.5;1,1;technic_cnc_sphere.png;sphere; ]"..

	"image_button[1,2.5;1,1;technic_cnc_slope_lying.png;slope_lying; ]"..
	"image_button[2,2.5;1,1;technic_cnc_onecurvededge.png;onecurvededge; ]"..
	"image_button[3,2.5;1,1;technic_cnc_twocurvededge.png;twocurvededge; ]"..

	"label[1,3.5;"..S("Slim Elements half / normal height:").."]"..

	"image_button[1,4;1,0.5;technic_cnc_full.png;full; ]"..
	"image_button[1,4.5;1,0.5;technic_cnc_half.png;half; ]"..
	"image_button[2,4;1,1;technic_cnc_element_straight.png;element_straight; ]"..
	"image_button[3,4;1,1;technic_cnc_element_end.png;element_end; ]"..
	"image_button[4,4;1,1;technic_cnc_element_cross.png;element_cross; ]"..
	"image_button[5,4;1,1;technic_cnc_element_t.png;element_t; ]"..
	"image_button[6,4;1,1;technic_cnc_element_edge.png;element_edge; ]"..

	"label[0, 5.5;"..S("In:").."]"..
	"list[current_name;src;0.5,5.5;1,1;]"..
	"label[4, 5.5;"..S("Out:").."]"..
	"list[current_name;dst;5,5.5;4,1;]"..

	"list[current_player;main;0,7;8,4;]"..
	"listring[current_name;dst]"..
	"listring[current_player;main]"..
	"listring[current_name;src]"..
	"listring[current_player;main]"

local size = 1;

-- The form handler is declared here because we need it in both the inactive and active modes
-- in order to be able to change programs wile it is running.
local function form_handler(pos, formname, fields, sender)
	-- REGISTER MILLING PROGRAMS AND OUTPUTS:
	------------------------------------------
	-- Program for half/full size
	if fields["full"] then
		size = 1
		return
	end

	if fields["half"] then
		size = 2
		return
	end

	-- Resolve the node name and the number of items to make
	local meta       = minetest.get_meta(pos)
	local inv        = meta:get_inventory()
	local inputstack = inv:get_stack("src", 1)
	local inputname  = inputstack:get_name()
	local multiplier = 0
	for k, _ in pairs(fields) do
		-- Set a multipier for the half/full size capable blocks
		if twosize_products[k] ~= nil then
			multiplier = size * twosize_products[k]
		else
			multiplier = onesize_products[k]
		end

		if onesize_products[k] ~= nil or twosize_products[k] ~= nil then
			meta:set_float( "cnc_multiplier", multiplier)
			meta:set_string("cnc_user", sender:get_player_name())
		end

		if onesize_products[k] ~= nil or (twosize_products[k] ~= nil and size==2) then
			meta:set_string("cnc_product",  inputname .. "_technic_cnc_" .. k)
			--print(inputname .. "_technic_cnc_" .. k)
			break
		end

		if twosize_products[k] ~= nil and size==1 then
			meta:set_string("cnc_product",  inputname .. "_technic_cnc_" .. k .. "_double")
			--print(inputname .. "_technic_cnc_" .. k .. "_double")
			break
		end
	end
	return
end

-- Action code performing the transformation
local run = function(pos, node)
	local meta         = minetest.get_meta(pos)
	local inv          = meta:get_inventory()
	local eu_input     = meta:get_int("LV_EU_input")
	local machine_name = S("%s CNC Machine"):format("LV")
	local machine_node = "technic:cnc"
	local demand       = 450

	local result = meta:get_string("cnc_product")
	if inv:is_empty("src") or
	   (not minetest.registered_nodes[result]) or
	   (not inv:room_for_item("dst", result)) then
		technic.swap_node(pos, machine_node)
		meta:set_string("infotext", S("%s Idle"):format(machine_name))
		meta:set_string("cnc_product", "")
		meta:set_int("LV_EU_demand", 0)
		return
	end

	if eu_input < demand then
		technic.swap_node(pos, machine_node)
		meta:set_string("infotext", S("%s Unpowered"):format(machine_name))
	elseif eu_input >= demand then
		technic.swap_node(pos, machine_node.."_active")
		meta:set_string("infotext", S("%s Active"):format(machine_name))
		meta:set_int("src_time", meta:get_int("src_time") + 1)
		if meta:get_int("src_time") >= 3 then -- 3 ticks per output
			meta:set_int("src_time", 0)
			srcstack = inv:get_stack("src", 1)
			srcstack:take_item()
			inv:set_stack("src", 1, srcstack)
			inv:add_item("dst", result.." "..meta:get_int("cnc_multiplier"))
		end
	end
	meta:set_int("LV_EU_demand", demand)
end

-- The actual block inactive state
minetest.register_node("technic:cnc", {
	description = S("%s CNC Machine"):format("LV"),
	tiles       = {"technic_cnc_top.png", "technic_cnc_bottom.png", "technic_cnc_side.png",
	               "technic_cnc_side.png", "technic_cnc_side.png", "technic_cnc_front.png"},
	groups = {cracky=2, technic_machine=1, technic_lv=1},
	connect_sides = {"bottom", "back", "left", "right"},
	paramtype2  = "facedir",
	legacy_facedir_simple = true,
	on_construct = function(pos)
		local meta = minetest.get_meta(pos)
		meta:set_string("infotext", S("%s CNC Machine"):format("LV"))
		meta:set_float("technic_power_machine", 1)
		meta:set_string("formspec", cnc_formspec)
		local inv = meta:get_inventory()
		inv:set_size("src", 1)
		inv:set_size("dst", 4)
	end,
	can_dig = technic.machine_can_dig,
	allow_metadata_inventory_put = technic.machine_inventory_put,
	allow_metadata_inventory_take = technic.machine_inventory_take,
	allow_metadata_inventory_move = technic.machine_inventory_move,
	on_receive_fields = form_handler,
	technic_run = run,
})

-- Active state block
minetest.register_node("technic:cnc_active", {
	description = S("%s CNC Machine"):format("LV"),
	tiles       = {"technic_cnc_top_active.png", "technic_cnc_bottom.png", "technic_cnc_side.png",
	               "technic_cnc_side.png",       "technic_cnc_side.png",   "technic_cnc_front_active.png"},
	groups = {cracky=2, technic_machine=1, technic_lv=1, not_in_creative_inventory=1},
	connect_sides = {"bottom", "back", "left", "right"},
	paramtype2 = "facedir",
	drop = "technic:cnc",
	legacy_facedir_simple = true,
	can_dig = technic.machine_can_dig,
	allow_metadata_inventory_put = technic.machine_inventory_put,
	allow_metadata_inventory_take = technic.machine_inventory_take,
	allow_metadata_inventory_move = technic.machine_inventory_move,
	on_receive_fields = form_handler,
	technic_run = run,
	technic_disabled_machine_name = "technic:cnc",
})

technic.register_machine("LV", "technic:cnc",        technic.receiver)
technic.register_machine("LV", "technic:cnc_active", technic.receiver)