-- punch configuration utility helper

-- playername -> punchDef
local punch_handler = {}

--[[
Registers a punch-configuration callback:

epic.punchnode_callback({
	nodes = {"default:dirt"},
	timeout = 300,
	check_protection = true,
	callback = function(pos, node) end
})
--]]
function epic.punchnode_callback(player, punchDef)
	local playername = player:get_player_name()
	punch_handler[playername] = punchDef
end


minetest.register_on_punchnode(function(pos, node, puncher)
	local playername = puncher:get_player_name()
	local punchDef = punch_handler[playername]

	-- abort if no callback waiting
	if not punchDef then
		return
	end

	-- TODO: check timeout

	-- clear callback
	punch_handler[playername] = nil

	if punchDef.check_protection then
		if minetest.is_protected(pos, playername) and
			not minetest.check_player_privs(playername, {epic_admin=true}) then
			minetest.chat_send_player(playername, "[epic] target is protected! aborting selection.")
			return
		end
	end

	-- check valid nodes
	local valid_node = false

	if punchDef.nodes then
		-- go through list
		for _, nodename in ipairs(punchDef.nodes) do
			if node.name == nodename then
				valid_node = true
				break
			end
		end
	else
		-- all nodes valid
		valid_node = true
	end

	if not valid_node then
		minetest.chat_send_player(playername, "[epic] target node invalid! valid types: " .. dump(punchDef.nodes))
		return
	end

	punchDef.callback(pos, node)
end)

-- cleanup
minetest.register_on_leaveplayer(function(player)
	local playername = player:get_player_name()
	punch_handler[playername] = nil
end)