-- internationalization boilerplate
local MP = minetest.get_modpath(minetest.get_current_modname())
local S, NS = dofile(MP.."/intllib.lua")

local controller_nodebox ={
	{-0.3125, -0.3125, -0.3125, 0.3125, 0.3125, 0.3125}, -- Core
	{-0.1875, 0.3125, -0.1875, 0.1875, 0.5, 0.1875}, -- +y_connector
	{-0.1875, -0.5, -0.1875, 0.1875, -0.3125, 0.1875}, -- -y_Connector
	{0.3125, -0.1875, -0.1875, 0.5, 0.1875, 0.1875}, -- +x_connector
	{-0.5, -0.1875, -0.1875, -0.3125, 0.1875, 0.1875}, -- -x_connector
	{-0.1875, -0.1875, 0.3125, 0.1875, 0.1875, 0.5}, -- +z_connector
	{-0.5, 0.125, -0.5, -0.125, 0.5, -0.3125}, -- back_connector_3
	{0.125, 0.125, -0.5, 0.5, 0.5, -0.3125}, -- back_connector_1
	{0.125, -0.5, -0.5, 0.5, -0.125, -0.3125}, -- back_connector_2
	{-0.5, -0.5, -0.5, -0.125, -0.125, -0.3125}, -- back_connector_4
}

-- Master controller. Most complicated part of the whole system. Determines which direction a digtron moves and triggers all of its component parts.
minetest.register_node("digtron:controller", {
	description = S("Digtron Control Module"),
	_doc_items_longdesc = digtron.doc.controller_longdesc,
    _doc_items_usagehelp = digtron.doc.controller_usagehelp,
	groups = {cracky = 3, oddly_breakable_by_hand = 3, digtron = 1},
	drop = "digtron:controller",
	sounds = digtron.metal_sounds,
	paramtype = "light",
	paramtype2= "facedir",
	is_ground_content = false,
	-- Aims in the +Z direction by default
	tiles = {
		"digtron_plate.png^[transformR90",
		"digtron_plate.png^[transformR270",
		"digtron_plate.png",
		"digtron_plate.png^[transformR180",
		"digtron_plate.png",
		"digtron_plate.png^digtron_control.png",
	},
	
	drawtype = "nodebox",
	node_box = {
		type = "fixed",
		fixed = controller_nodebox,
	},
	
	on_construct = function(pos)
        local meta = minetest.get_meta(pos)
		meta:set_float("fuel_burning", 0.0)
		meta:set_string("infotext", string.format(S("Heat remaining in controller furnace: %d"), 0))
	end,
	
	on_rightclick = function(pos, node, clicker, itemstack, pointed_thing)
		local meta = minetest.get_meta(pos)
		if meta:get_string("waiting") == "true" then
			-- Been too soon since last time the digtron did a cycle.
			return
		end
	
		local newpos, status, return_code = digtron.execute_dig_cycle(pos, clicker)
		
		meta = minetest.get_meta(newpos)
		if status ~= nil then
			meta:set_string("infotext", status)
		end
		
		-- Start the delay before digtron can run again.
		minetest.get_meta(newpos):set_string("waiting", "true")
		minetest.get_node_timer(newpos):start(digtron.cycle_time)
	end,
	
	on_timer = function(pos, elapsed)
		minetest.get_meta(pos):set_string("waiting", nil)
	end,
})

-- Auto-controller
---------------------------------------------------------------------------------------------------------------

local auto_formspec = "size[8,6.2]" ..
	default.gui_bg ..
	default.gui_bg_img ..
	default.gui_slots ..
	"container[2.0,0]" ..
	"field[0.0,0.8;1,0.1;cycles;" .. S("Cycles").. ";${cycles}]" ..
	"tooltip[cycles;" .. S("When triggered, this controller will try to run for the given number of cycles.\nThe cycle count will decrement as it runs, so if it gets halted by a problem\nyou can fix the problem and restart.").. "]" ..
	"button_exit[0.7,0.5;1,0.1;set;" .. S("Set").. "]" ..
	"tooltip[set;" .. S("Saves the cycle setting without starting the controller running").. "]" ..
	"button_exit[1.7,0.5;1,0.1;execute;" .. S("Set &\nExecute").. "]" ..
	"tooltip[execute;" .. S("Begins executing the given number of cycles").. "]" ..
	"field[0.0,2.0;1,0.1;slope;" .. S("Slope").. ";${slope}]" ..
	"tooltip[slope;" .. S("For diagonal digging. After every X nodes the auto controller moves forward,\nthe controller will add an additional cycle moving the digtron laterally in the\ndirection of the arrows on the side of this controller.\nSet to 0 for no lateral digging.").. "]" ..
	"field[1.0,2.0;1,0.1;offset;" .. S("Offset").. ";${offset}]" ..
	"tooltip[offset;" .. S("Sets the offset of the lateral motion defined in the Slope field.\nNote: this offset is relative to the controller's location.\nThe controller will move down when it reaches the indicated point.").. "]" ..
	"field[2.0,2.0;1,0.1;period;" .. S("Delay").. ";${period}]" ..
	"tooltip[period;" .. S("Number of seconds to wait between each cycle").. "]" ..
	"list[current_name;stop;3.0,0.7;1,1;]" ..
	"label[3.0,1.5;" .. S("Stop block").. "]"	..
	"container_end[]" ..
	"list[current_player;main;0,2.3;8,1;]" ..
	default.get_hotbar_bg(0,2.3) ..
	"list[current_player;main;0,3.5;8,3;8]" ..
	"listring[current_player;main]" ..
	"listring[current_name;stop]"

if minetest.get_modpath("doc") then
	auto_formspec = auto_formspec ..
	"button_exit[7.0,0.5;1,0.1;help;" .. S("Help") .. "]" ..
	"tooltip[help;" .. S("Show documentation about this block").. "]"
end	

-- Needed to make this global so that it could recurse into minetest.after
digtron.auto_cycle = function(pos)
	local node = minetest.get_node(pos)
	local controlling_coordinate = digtron.get_controlling_coordinate(pos, node.param2)
	local meta = minetest.get_meta(pos)
	local player = minetest.get_player_by_name(meta:get_string("triggering_player"))
	if player == nil or meta:get_string("waiting") == "true" then
		return
	end

	local cycle = meta:get_int("cycles")
	local slope = meta:get_int("slope")
	
	if meta:get_string("lateral_done") ~= "true" and slope ~= 0 and (pos[controlling_coordinate] + meta:get_int("offset")) % slope == 0 then
		--Do a downward dig cycle. Don't update the "cycles" count, these don't count towards that.
		local newpos, status, return_code = digtron.execute_downward_dig_cycle(pos, player)
		
		if vector.equals(pos, newpos) then
			status = status .. string.format("\n" .. S("Cycles remaining: %d") .. "\n" .. S("Halted!"), cycle)
			meta:set_string("infotext", status)
			if return_code == 1 then --return code 1 happens when there's unloaded nodes adjacent, just keep trying.
				minetest.after(meta:get_int("period"), digtron.auto_cycle, newpos)
			else
				meta:set_string("formspec", auto_formspec)
			end
		else
			meta = minetest.get_meta(newpos)
			minetest.after(meta:get_int("period"), digtron.auto_cycle, newpos)
			meta:set_string("infotext", status)
			meta:set_string("lateral_done", "true")
		end
		return
	end
	
	local newpos, status, return_code = digtron.execute_dig_cycle(pos, player)
	
	if vector.equals(pos, newpos) then
		status = status .. string.format("\n" .. S("Cycles remaining: %d") .. "\n" .. S("Halted!"), cycle)
		meta:set_string("infotext", status)
		if return_code == 1 then --return code 1 happens when there's unloaded nodes adjacent, just keep trying.
			minetest.after(meta:get_int("period"), digtron.auto_cycle, newpos)
		else
			meta:set_string("formspec", auto_formspec)
		end
		return
	end
	
	meta = minetest.get_meta(newpos)
	cycle = meta:get_int("cycles") - 1
	meta:set_int("cycles", cycle)
	status = status .. string.format("\n" .. S("Cycles remaining: %d"), cycle)
	meta:set_string("infotext", status)
	meta:set_string("lateral_done", nil)
	
	if cycle > 0 then
		minetest.after(meta:get_int("period"), digtron.auto_cycle, newpos)
	else
		meta:set_string("formspec", auto_formspec)
	end
end

minetest.register_node("digtron:auto_controller", {
	description = S("Digtron Automatic Control Module"),
	_doc_items_longdesc = digtron.doc.auto_controller_longdesc,
    _doc_items_usagehelp = digtron.doc.auto_controller_usagehelp,
	groups = {cracky = 3, oddly_breakable_by_hand = 3, digtron = 1},
	drop = "digtron:auto_controller",
	sounds = digtron.metal_sounds,
	paramtype = "light",
	paramtype2= "facedir",
	is_ground_content = false,
	-- Aims in the +Z direction by default
	tiles = {
		"digtron_plate.png^[transformR90^[colorize:" .. digtron.auto_controller_colorize,
		"digtron_plate.png^[transformR270^[colorize:" .. digtron.auto_controller_colorize,
		"digtron_plate.png^digtron_axel_side.png^[transformR270^[colorize:" .. digtron.auto_controller_colorize,
		"digtron_plate.png^digtron_axel_side.png^[transformR270^[colorize:" .. digtron.auto_controller_colorize,
		"digtron_plate.png^[colorize:" .. digtron.auto_controller_colorize,
		"digtron_plate.png^digtron_control.png^[colorize:" .. digtron.auto_controller_colorize,
	},
	
	drawtype = "nodebox",
	node_box = {
		type = "fixed",
		fixed = controller_nodebox,
	},
	
	on_construct = function(pos)
        local meta = minetest.get_meta(pos)
		meta:set_float("fuel_burning", 0.0)
		meta:set_string("infotext", string.format(S("Heat remaining in controller furnace: %d"), 0))
		meta:set_string("formspec", auto_formspec)
		-- Reusing offset and period to keep the digtron node-moving code simple, and the names still fit well
		meta:set_int("period", digtron.cycle_time)
		meta:set_int("offset", 0)
		meta:set_int("cycles", 0)
		meta:set_int("slope", 0)
		
		local inv = meta:get_inventory()
		inv:set_size("stop", 1)
	end,

	allow_metadata_inventory_put = function(pos, listname, index, stack, player)
		if minetest.get_item_group(stack:get_name(), "digtron") ~= 0 then
			return 0 -- pointless setting a Digtron node as a stop block
		end	
		local inv = minetest.get_inventory({type="node", pos=pos})
		inv:set_stack(listname, index, stack:take_item(1))
		return 0
	end,
	
	allow_metadata_inventory_take = function(pos, listname, index, stack, player)
		local inv = minetest.get_inventory({type="node", pos=pos})
		inv:set_stack(listname, index, ItemStack(""))
		return 0
	end,
	
	on_receive_fields = function(pos, formname, fields, sender)
        local meta = minetest.get_meta(pos)
		local offset = tonumber(fields.offset)
		local period = tonumber(fields.period)
		local slope = tonumber(fields.slope)
		local cycles = tonumber(fields.cycles)
		
		if period and period > 0 then
			meta:set_int("period", math.max(digtron.cycle_time, math.floor(period)))
		end

		if offset then
			meta:set_int("offset", offset)
		end
		
		if slope and slope >= 0 then
			meta:set_int("slope", slope)
		end
		
		if cycles and cycles >= 0 then
			meta:set_int("cycles", math.floor(cycles))
			if sender:is_player() and cycles > 0 then
				meta:set_string("triggering_player", sender:get_player_name())
				if fields.execute then
					meta:set_string("waiting", nil)
					meta:set_string("formspec", nil)
					digtron.auto_cycle(pos)
				end
			end
		end

		if fields.set and slope and slope > 0 then
			local node = minetest.get_node(pos)
			local controlling_coordinate = digtron.get_controlling_coordinate(pos, node.param2)
			
			local newpos = pos
			local markerpos = {x=newpos.x, y=newpos.y, z=newpos.z}
			local x_pos = math.floor((newpos[controlling_coordinate]+offset)/slope)*slope - offset
			markerpos[controlling_coordinate] = x_pos
			minetest.add_entity(markerpos, "digtron:marker_vertical")
			if x_pos >= newpos[controlling_coordinate] then
				markerpos[controlling_coordinate] = x_pos - slope
				minetest.add_entity(markerpos, "digtron:marker_vertical")
			end
			if x_pos <= newpos[controlling_coordinate] then
				markerpos[controlling_coordinate] = x_pos + slope
				minetest.add_entity(markerpos, "digtron:marker_vertical")
			end
		end	
		
		if fields.help and minetest.get_modpath("doc") then --check for mod in case someone disabled it after this digger was built
			doc.show_entry(sender:get_player_name(), "nodes", "digtron:auto_controller")
		end
	end,	
	
	on_rightclick = function(pos, node, clicker, itemstack, pointed_thing)
		local meta = minetest.get_meta(pos)
		meta:set_string("infotext", meta:get_string("infotext") .. "\n" .. S("Interrupted!"))
		meta:set_string("waiting", "true")
		meta:set_string("formspec", auto_formspec)
	end,
	
	on_timer = function(pos, elapsed)
		minetest.get_meta(pos):set_string("waiting", nil)
	end,

})

---------------------------------------------------------------------------------------------------------------

-- A much simplified control unit that only moves the digtron, and doesn't trigger the diggers or builders.
-- Handy for shoving a digtron to the side if it's been built a bit off.
minetest.register_node("digtron:pusher", {
	description = S("Digtron Pusher Module"),
	_doc_items_longdesc = digtron.doc.pusher_longdesc,
    _doc_items_usagehelp = digtron.doc.pusher_usagehelp,
	groups = {cracky = 3, oddly_breakable_by_hand=3, digtron = 1},
	drop = "digtron:pusher",
	sounds = digtron.metal_sounds,
	paramtype = "light",
	paramtype2= "facedir",
	is_ground_content = false,
	-- Aims in the +Z direction by default
	tiles = {
		"digtron_plate.png^[transformR90^[colorize:" .. digtron.pusher_controller_colorize,
		"digtron_plate.png^[transformR270^[colorize:" .. digtron.pusher_controller_colorize,
		"digtron_plate.png^[colorize:" .. digtron.pusher_controller_colorize,
		"digtron_plate.png^[transformR180^[colorize:" .. digtron.pusher_controller_colorize,
		"digtron_plate.png^[colorize:" .. digtron.pusher_controller_colorize,
		"digtron_plate.png^digtron_control.png^[colorize:" .. digtron.pusher_controller_colorize,
	},
	
	drawtype = "nodebox",
	node_box = {
		type = "fixed",
		fixed = controller_nodebox,
	},
	
	on_rightclick = function(pos, node, clicker, itemstack, pointed_thing)	
		local meta = minetest.get_meta(pos)
		if meta:get_string("waiting") == "true" then
			-- Been too soon since last time the digtron did a cycle.
			return
		end

		local newpos, status_text, return_code = digtron.execute_move_cycle(pos, clicker)
		meta = minetest.get_meta(newpos)
		meta:set_string("infotext", status_text)
		
		-- Start the delay before digtron can run again.
		minetest.get_meta(newpos):set_string("waiting", "true")
		minetest.get_node_timer(newpos):start(digtron.cycle_time)
	end,
	
	on_timer = function(pos, elapsed)
		minetest.get_meta(pos):set_string("waiting", nil)
	end,

})