local elapsed_time = 0
local tick_time = 0.05
local drop_action = InventoryAction("drop")

core.register_globalstep(function(dtime)
	-- AutoEject
	if core.settings:get_bool("autoeject") then
		local player = core.localplayer
		local list = (core.settings:get("eject_items") or ""):split(",")
		local inventory = core.get_inventory("current_player")
		for index, stack in pairs(inventory.main) do
			if table.indexof(list, stack:get_name()) ~= -1 then
				drop_action:from("current_player", "main", index - 1)
				drop_action:apply()
			end
		end
	end
	-- NextItem
	if core.settings:get_bool("next_item") then
		elapsed_time = elapsed_time + dtime
		if elapsed_time < tick_time then return end
		local player = minetest.localplayer
		if not player then return end
		local item = player:get_wielded_item()
		if item:get_count() == 0 then
			local index = player:get_wield_index()
			player:set_wield_index(index + 1)
		end
		elapsed_time = 0
	end
end)

core.register_list_command("eject", "Configure AutoEject", "eject_items")

-- AutoTool

local function check_tool(stack, node_groups, old_best_time)
	local toolcaps = stack:get_tool_capabilities()
	if not toolcaps then return end
	local best_time = old_best_time
	for group, groupdef in pairs(toolcaps.groupcaps) do
		local level = node_groups[group]
		if level then
			local this_time = groupdef.times[level]
			if this_time < best_time then
				best_time = this_time
			end
		end
	end
	return best_time < old_best_time, best_time
end

core.register_on_punchnode(function(pos, node)
	if not minetest.settings:get_bool("autotool") then return end
	local player = minetest.localplayer
	local inventory = minetest.get_inventory("current_player")
	local node_groups = minetest.get_node_def(node.name).groups
	local new_index = player:get_wield_index()
	local is_better, best_time = false, math.huge
	is_better, best_time = check_tool(player:get_wielded_item(), node_groups, best_time)
	is_better, best_time = check_tool(inventory.hand[1], node_groups, best_time)
	for index, stack in pairs(inventory.main) do
		is_better, best_time = check_tool(stack, node_groups, best_time)
		if is_better then
			new_index = index - 1
		end
	end
	player:set_wield_index(new_index)
end)

-- Enderchest

function get_itemslot_bg(x, y, w, h)
	local out = ""
	for i = 0, w - 1, 1 do
		for j = 0, h - 1, 1 do
			out = out .."image["..x+i..","..y+j..";1,1;mcl_formspec_itemslot.png]"
		end
	end
	return out
end

local enderchest_formspec = "size[9,8.75]"..
	"label[0,0;"..minetest.formspec_escape(minetest.colorize("#313131", "Ender Chest")).."]"..
	"list[current_player;enderchest;0,0.5;9,3;]"..
	get_itemslot_bg(0,0.5,9,3)..
	"label[0,4.0;"..minetest.formspec_escape(minetest.colorize("#313131", "Inventory")).."]"..
	"list[current_player;main;0,4.5;9,3;9]"..
	get_itemslot_bg(0,4.5,9,3)..
	"list[current_player;main;0,7.74;9,1;]"..
	get_itemslot_bg(0,7.74,9,1)..
	"listring[current_player;enderchest]"..
	"listring[current_player;main]"

function core.open_enderchest()
	core.show_formspec("__builtin__:enderchest", enderchest_formspec)
end

-- HandSlot

local hand_formspec = "size[9,8.75]"..
	"label[0,0;"..minetest.formspec_escape(minetest.colorize("#313131", "Hand")).."]"..
	"list[current_player;hand;0,0.5;1,1;]"..
	get_itemslot_bg(0,0.5,1,1)..
	"label[0,4.0;"..minetest.formspec_escape(minetest.colorize("#313131", "Inventory")).."]"..
	"list[current_player;main;0,4.5;9,3;9]"..
	get_itemslot_bg(0,4.5,9,3)..
	"list[current_player;main;0,7.74;9,1;]"..
	get_itemslot_bg(0,7.74,9,1)..
	"listring[current_player;hand]"..
	"listring[current_player;main]"
	
function core.open_handslot()
	minetest.show_formspec("__builtin__:hand", hand_formspec)
end