-- Minetest 0.4 mod: spawn_sanitizer
-- Bones are eventually removed from spawn.
--
-- See README.txt for licensing and other information.

spawn_sanitizer = {}
spawn_sanitizer.cleaned=false
spawn_sanitizer.timer=0

minetest.registered_nodes["bones:bones"].groups = {dig_immediate=3}
local facedir_for_bones = 4

minetest.register_abm({
	nodenames = {"bones:bones"},
	interval = 600,
	chance = 1,
	action = function(pos)
		local owner = minetest.get_meta(pos):get_string("owner")
		if owner=="" then
			local node=minetest.get_node(pos)
			local nodeinventory = minetest.get_meta(pos):get_inventory()
			if  node.param2 ~= facedir_for_bones then
				if nodeinventory:is_empty("main") then
					node.param2=facedir_for_bones
					minetest.swap_node(pos, node)
				end
			end
		end
	end,
})

minetest.register_abm({
	nodenames = {"bones:bones"},
	interval = 3600,
	chance = 6,
	action = function(pos)
		if pos.x>-80 and pos.x<80 and pos.z>-80 and pos.z<80 and pos.y>-45 then
			local owner = minetest.get_meta(pos):get_string("owner")
			if owner=="" then
				local node=minetest.get_node(pos)
				local nodeinventory = minetest.get_meta(pos):get_inventory()
				if  node.param2 ~= facedir_for_bones then
					if not nodeinventory:is_empty("main") then
						nodeinventory:remove_item("main", "default:pick_wood")
						nodeinventory:remove_item("main", "default:torch")
						nodeinventory:remove_item("main", "default:apple")
						nodeinventory:remove_item("main", "default:cobble")
						nodeinventory:remove_item("main", "default:furnace")
						nodeinventory:remove_item("main", "stairs:stair_cobble")
						nodeinventory:remove_item("main", "stairs:slab_cobble")
						nodeinventory:remove_item("main", "bones:bones")
					end
				end
			end
		end
	end,
})

minetest.register_abm({
	nodenames = {"bones:bones"},
	interval = 9000,
	chance = 8,
	action = function(pos)
		if pos.x>-40 and pos.x<40 and pos.z>-40 and pos.z<40 and pos.y>-45 then
			local owner = minetest.get_meta(pos):get_string("owner")
			if owner=="" then
				local node=minetest.get_node(pos)
				local nodeinventory = minetest.get_meta(pos):get_inventory()
				if  node.param2 == facedir_for_bones then
					if nodeinventory:is_empty("main") then
						minetest.remove_node(pos)
					end
				end
			end
		end
	end,
})

spawn_sanitizer.clean_spawnpoint = function()
    minetest.set_node({x=0, y=4, z=0}, {name="air"});
    minetest.set_node({x=1, y=3, z=0}, {name="air"});
    minetest.set_node({x=1, y=4, z=0}, {name="air"});
    minetest.set_node({x=0, y=4, z=1}, {name="air"});
    minetest.set_node({x=0, y=5, z=2}, {name="air"});
    minetest.set_node({x=0, y=6, z=2}, {name="air"});
    minetest.set_node({x=0, y=6, z=3}, {name="air"});
    minetest.set_node({x=0, y=5, z=3}, {name="air"});
    minetest.after(75, spawn_sanitizer.clean_spawnpoint); --recursion
end;

minetest.after(75, function(dtime)

	if spawn_sanitizer.cleaned==true then
		return
	end

	local positions1 = minetest.find_nodes_in_area(
		{x=-20, y=-4, z=-20},
		{x=20, y=1, z=20},
		{"air", "default:water_flowing", "default:water_source"})
	for _, pos in ipairs(positions1) do
		minetest.set_node(pos, {name="default:cobble"})
	end
	local positions2 = minetest.find_nodes_in_area(
		{x=-21, y=0, z=-21},
		{x=21, y=0, z=21},
		{"air", "default:water_flowing", "default:water_source"})
	for _, pos in ipairs(positions2) do
		minetest.set_node(pos, {name="default:cobble"})
	end
	local positions3 = minetest.find_nodes_in_area(
		{x=-22, y=-1, z=-22},
		{x=22, y=-1, z=22},
		{"air", "default:water_flowing", "default:water_source"})
	for _, pos in ipairs(positions3) do
		minetest.set_node(pos, {name="default:cobble"})
	end
	local positions4 = minetest.find_nodes_in_area(
		{x=-23, y=-2, z=-23},
		{x=23, y=-2, z=23},
		{"air", "default:water_flowing", "default:water_source"})
	for _, pos in ipairs(positions4) do
		minetest.set_node(pos, {name="default:cobble"})
	end
	local positions5 = minetest.find_nodes_in_area(
		{x=-24, y=-3, z=-24},
		{x=24, y=-3, z=24},
		{"air", "default:water_flowing", "default:water_source"})
	for _, pos in ipairs(positions5) do
		minetest.set_node(pos, {name="default:cobble"})
	end

	local positions6 = minetest.find_nodes_in_area(
		{x=-21, y=2, z=-21},
		{x=21, y=70, z=21},
		{"default:cobble", "default:stone", "default:water_source", "default:lava_source", "default:water_flowing"})
	for _, pos in ipairs(positions6) do
		minetest.set_node(pos, {name="air"})
	end

	local positions7 = minetest.find_nodes_in_area(
		{x=-50, y=-50, z=-50},
		{x=50, y=50, z=50},
		{"default:furnace"})
	for _, pos in ipairs(positions7) do
		minetest.set_node(pos, {name="air"})
	end

	local positions8 = minetest.find_nodes_in_area(
		{x=-3, y=-3, z=-3},
		{x=3, y=0, z=3},
		{"default:cobble"})
	for _, pos in ipairs(positions8) do
		minetest.set_node(pos, {name="air"})
	end

	local positions9 = minetest.find_nodes_in_area(
		{x=-2, y=1, z=-2},
		{x=2, y=2, z=2},
		{"default:tree","default:cactus","default:jungletree"})
	for _, pos in ipairs(positions9) do
		minetest.set_node(pos, {name="air"})
	end

    local positions10 = minetest.find_nodes_in_area(
		{x=-5, y=4, z=-5},
		{x=5, y=8, z=5},
		{"default:chest_locked","doors:door_steel"})
	for _, pos in ipairs(positions10) do
		minetest.remove_node(pos)
	end

    minetest.set_node({x=-2, y=1, z=-2}, {name="default:lava_source"})
    minetest.set_node({x=-2, y=1, z=2}, {name="default:lava_source"})


	for z1=-27, -16 do
		minetest.set_node({x=37, y=2, z=z1}, {name="default:rail"})
        minetest.set_node({x=37, y=1, z=z1}, {name="default:stonebrick"})
	end
	for z1=16, 29 do
		minetest.set_node({x=37, y=2, z=z1}, {name="default:rail"})
        minetest.set_node({x=37, y=1, z=z1}, {name="default:stonebrick"})
	end
	for z1=-15, 15 do
		minetest.set_node({x=37, y=2, z=z1}, {name="carts:brakerail"})
        minetest.set_node({x=37, y=1, z=z1}, {name="default:stonebrick"})
	end
	for x1=36, 17, -1 do
		minetest.set_node({x=x1, y=2, z=-27}, {name="default:rail"})
		minetest.set_node({x=x1, y=2, z=29}, {name="default:rail"})
        minetest.set_node({x=x1, y=1, z=-27}, {name="default:stonebrick"})
        minetest.set_node({x=x1, y=1, z=29}, {name="default:stonebrick"})
	end
	for x1=16, 2, -1 do
		minetest.set_node({x=x1, y=2, z=-27}, {name="carts:powerrail"})
		minetest.set_node({x=x1, y=2, z=29}, {name="carts:powerrail"})
        minetest.set_node({x=x1, y=1, z=-27}, {name="default:stonebrick"})
        minetest.set_node({x=x1, y=1, z=29}, {name="default:stonebrick"})
	end
	for z1=-26, -17 do
		minetest.set_node({x=2, y=2, z=z1}, {name="default:rail"})
        minetest.set_node({x=2, y=1, z=z1}, {name="default:stonebrick"})
	end
	for z1=17, 28 do
		minetest.set_node({x=2, y=2, z=z1}, {name="default:rail"})
        minetest.set_node({x=2, y=1, z=z1}, {name="default:stonebrick"})
	end
	for z1=-17, 17 do
		minetest.set_node({x=3, y=2, z=z1}, {name="default:rail"})
        minetest.set_node({x=3, y=1, z=z1}, {name="default:stonebrick"})
	end
	minetest.add_entity({x=3, y=2, z=0}, "carts:cart")

	if not spawn_sanitizer.cleaned then
		spawn_sanitizer.cleaned=true
		minetest.log("action", "Spawn sanitized!")
	end

    spawn_sanitizer.clean_spawnpoint();
end)

-- expects protection block mods to defend spawn by itself.