-- ███████ ███████ ██      ███████  ██████ ████████ ██  ██████  ███    ██
-- ██      ██      ██      ██      ██         ██    ██ ██    ██ ████   ██
-- ███████ █████   ██      █████   ██         ██    ██ ██    ██ ██ ██  ██
--      ██ ██      ██      ██      ██         ██    ██ ██    ██ ██  ██ ██
-- ███████ ███████ ███████ ███████  ██████    ██    ██  ██████  ██   ████

---Selection helpers and modifiers
local selection = {}

--- Additively adds a point to the current selection or
--		makes a selection from the provided point.
-- @param name	string	Player name.
-- @param pos	vector	The position to include.
function selection.add_point(name, pos)
	if pos ~= nil then
		-- print("[set_pos1]", name, "("..pos.x..", "..pos.y..", "..pos.z..")")
		if not worldedit.pos1[name] then worldedit.pos1[name] = vector.new(pos) end
		if not worldedit.pos2[name] then worldedit.pos2[name] = vector.new(pos) end
		
		worldedit.marker_update(name)
		
		local volume_before = worldedit.volume(worldedit.pos1[name], worldedit.pos2[name])
		
		worldedit.pos1[name], worldedit.pos2[name] = worldeditadditions.vector.expand_region(worldedit.pos1[name], worldedit.pos2[name], pos)
		
		local volume_after = worldedit.volume(worldedit.pos1[name], worldedit.pos2[name])
		
		local volume_difference = volume_after - volume_before
		
		worldedit.marker_update(name)
		worldedit.player_notify(name, "Expanded region by "..volume_difference.." nodes")
	else
		worldedit.player_notify(name, "Error: Too far away (try raising your maxdist with //farwand maxdist <number>)")
		-- print("[set_pos1]", name, "nil")
	end
end

--- Clears current selection.
-- @param name	string	Player name.
function selection.clear_points(name)
	worldedit.pos1[name] = nil
	worldedit.pos2[name] = nil
	worldedit.marker_update(name)
	worldedit.set_pos[name] = nil
	
	worldedit.player_notify(name, "Region cleared")
end

return selection