--[[
The Origin
version 1.1.1
]]

origin = {}

do
	local filepath = minetest.get_worldpath().."/origin.mt"
	local file = io.open(filepath, "r")
	if file then
		io.close(file)
		origin.exists = true
	else
		origin.exists = false
	end
end

minetest.register_node("origin:origin",{
	description = "The Origin",
	is_ground_content = true,
	groups = { not_in_creative_inventory = 1, immortal = 1 },
	tiles = {"origin_origin.png"},
	sounds = { footstep = "origin_origin_footstep" },
	is_ground_content = false,
})

minetest.register_on_mapgen_init(function(mgparams)
	origin.mgparams = mgparams
end)

minetest.register_on_generated(function(minp, maxp, seed)
	local spawn = minetest.setting_get_pos("static_spawnpoint")
	if origin.exists ~= true and origin.mgparams.mgname == "singlenode" then
		local blockpos
		if spawn ~= nil then
			blockpos = { x=spawn.x, y=spawn.y-1, z=spawn.z }
		else
			blockpos = { x=0, y=-1, z=0 }
		end
		if(minp.x <= blockpos.x and maxp.x >= blockpos.x and minp.y <= blockpos.y and maxp.y >= blockpos.y and minp.z <= blockpos.z and maxp.z >= blockpos.z) then
			minetest.set_node(blockpos, {name = "origin:origin"})
			minetest.log("action", "[origin] The Origin has been set at "..minetest.pos_to_string(blockpos)..".")
			origin.exists = true
			local filepath = minetest.get_worldpath().."/origin.mt"
			local file = io.open(filepath, "w")
			if file then
				file:write(minetest.pos_to_string(blockpos))
			else
				minetest.log("error", "[origin] Failed to write origin data into "..filepath..". The Origin may be placed again if you change static_spawnpoint.")
			end
		end
	end
end)