doors = {}

-- Registers a door - REDEFINITION ONLY | DOORS MOD MUST HAVE BEEN LOADED BEFORE
--  name: The name of the door
--  def: a table with the folowing fields:
--    description
--    inventory_image
--    groups
--    tiles_bottom: the tiles of the bottom part of the door {front, side}
--    tiles_top: the tiles of the bottom part of the door {front, side}
--    If the following fields are not defined the default values are used
--    node_box_bottom
--    node_box_top
--    selection_box_bottom
--    selection_box_top
--    only_placer_can_open: if true only the player who placed the door can
--                          open it
local function is_right(pos)
	local r1 = minetest.get_node({x=pos.x-1, y=pos.y, z=pos.z})
	local r2 = minetest.get_node({x=pos.x, y=pos.y, z=pos.z-1})
	if string.find(r1.name, "door_") or string.find(r2.name, "door_") then
		if string.find(r1.name, "_1") or string.find(r2.name, "_1") then
			return true
		else
			return false
		end
	end
end

function doors:register_door(name, def)
	def.groups.not_in_creative_inventory = 1

	local box = {{-0.5, -0.5, -0.5,   0.5, 0.5, -0.5+1.5/16}}

	if not def.node_box_bottom then
		def.node_box_bottom = box
	end
	if not def.node_box_top then
		def.node_box_top = box
	end
	if not def.selection_box_bottom then
		def.selection_box_bottom= box
	end
	if not def.selection_box_top then
		def.selection_box_top = box
	end

	local tt = def.tiles_top
	local tb = def.tiles_bottom

	local function after_dig_node(pos, name)
		if minetest.get_node(pos).name == name then
			minetest.remove_node(pos)
		end
	end

	local function on_rightclick(pos, dir, check_name, replace, replace_dir, params)
		pos.y = pos.y+dir
		if not minetest.get_node(pos).name == check_name then
			return
		end
		local p2 = minetest.get_node(pos).param2
		p2 = params[p2+1]

		local meta = minetest.get_meta(pos):to_table()
		minetest.set_node(pos, {name=replace_dir, param2=p2})
		minetest.get_meta(pos):from_table(meta)

		pos.y = pos.y-dir
		meta = minetest.get_meta(pos):to_table()
		minetest.set_node(pos, {name=replace, param2=p2})
		minetest.get_meta(pos):from_table(meta)

		local snd_1 = "_close"
		local snd_2 = "_open"
		if params[1] == 3 then
			snd_1 = "_open"
			snd_2 = "_close"
		end

		if is_right(pos) then
			minetest.sound_play("door"..snd_1, {pos = pos, gain = 0.3, max_hear_distance = 10})
		else
			minetest.sound_play("door"..snd_2, {pos = pos, gain = 0.3, max_hear_distance = 10})
		end
	end

	local function on_mesecons_signal_open (pos, node)
		on_rightclick(pos, 1, name.."_t_1", name.."_b_2", name.."_t_2", {1,2,3,0})
	end

	local function on_mesecons_signal_close (pos, node)
		on_rightclick(pos, 1, name.."_t_2", name.."_b_1", name.."_t_1", {3,0,1,2})
	end

	local function check_player_priv(pos, player)
		if not def.only_placer_can_open then
			return true
		end
		local meta = minetest.get_meta(pos)
		local pn = player:get_player_name()
		return meta:get_string("doors_owner") == pn
	end

	minetest.register_node(":"..name.."_b_1", {
		tiles = {tb[2], tb[2], tb[2], tb[2], tb[1], tb[1].."^[transformfx"},
		paramtype = "light",
		paramtype2 = "facedir",
		drop = name,
		drawtype = "nodebox",
		node_box = {
			type = "fixed",
			fixed = def.node_box_bottom
		},
		selection_box = {
			type = "fixed",
			fixed = def.selection_box_bottom
		},
		groups = def.groups,

		after_dig_node = function(pos, oldnode, oldmetadata, digger)
			pos.y = pos.y+1
			after_dig_node(pos, name.."_t_1")
		end,

		on_rightclick = function(pos, node, puncher)
			if check_player_priv(pos, puncher) then
				on_rightclick(pos, 1, name.."_t_1", name.."_b_2", name.."_t_2", {1,2,3,0})
			end
		end,

		mesecons = {effector = {
			action_on  = on_mesecons_signal_open
		}},

		can_dig = check_player_priv,
	})

	minetest.register_node(":"..name.."_b_2", {
		tiles = {tb[2], tb[2], tb[2], tb[2], tb[1].."^[transformfx", tb[1]},
		paramtype = "light",
		paramtype2 = "facedir",
		drop = name,
		drawtype = "nodebox",
		node_box = {
			type = "fixed",
			fixed = def.node_box_bottom
		},
		selection_box = {
			type = "fixed",
			fixed = def.selection_box_bottom
		},
		groups = def.groups,

		after_dig_node = function(pos, oldnode, oldmetadata, digger)
			pos.y = pos.y+1
			after_dig_node(pos, name.."_t_2")
		end,

		on_rightclick = function(pos, node, puncher)
			if check_player_priv(pos, puncher) then
				on_rightclick(pos, 1, name.."_t_2", name.."_b_1", name.."_t_1", {3,0,1,2})
			end
		end,

		mesecons = {effector = {
			action_off = on_mesecons_signal_close
		}},

		can_dig = check_player_priv,
	})
end

doors:register_door("doors:door_wood", {
	description = "Wooden Door",
	inventory_image = "doors_wood.png",
	groups = {snappy=1,choppy=2,oddly_breakable_by_hand=2,flammable=2,door=1},
	tiles_bottom = {"doors_wood_b.png", "doors_brown.png"},
	tiles_top = {"doors_wood_a.png", "doors_brown.png"},
	sounds = default.node_sound_wood_defaults(),
})

doors:register_door("doors:door_steel", {
	description = "Steel Door",
	inventory_image = "doors_steel.png",
	groups = {snappy=1,bendy=2,cracky=1,melty=2,level=2,door=1},
	tiles_bottom = {"doors_steel_b.png", "doors_grey.png"},
	tiles_top = {"doors_steel_a.png", "doors_grey.png"},
	only_placer_can_open = true,
	sounds = default.node_sound_stone_defaults(),
})