local utils = require 'mp.utils'
local ytdlPath = mp.find_config_file("youtube-dl.exe")
local fileDuration = 0
local function check_position()
	local demuxEndPosition = mp.get_property("demuxer-cache-time")
	if demuxEndPosition and (fileDuration - demuxEndPosition < 10) and (mp.get_property("playlist-pos-1")~=mp.get_property("playlist-count")) then
		local ytdl = {}
		ytdl.args = {ytdlPath}
		table.insert(ytdl.args, "-f best")
		table.insert(ytdl.args, "-e")
		table.insert(ytdl.args, "-g")
		local next = tonumber(mp.get_property("playlist-pos")) + 1
		local nextFile = mp.get_property("playlist/"..tostring(next).."/filename")
		if nextFile then
			table.insert(ytdl.args, nextFile)
			local res = utils.subprocess(ytdl)
			local es, txt = res.status, res.stdout
			local lines = {}
			for s in txt:gmatch("[^\r\n]+") do
				table.insert(lines, s)
			end
			mp.commandv("loadfile", lines[2], "append", 'force-media-title="'..lines[1]..'"')
			mp.commandv("playlist_move", mp.get_property("playlist-count") - 1 , next)
			mp.commandv("playlist_remove", next + 1)
			mp.unobserve_property(check_position)
		end
	end
end
local function observe()
	fileDuration = mp.get_property("duration")
	mp.observe_property("time-pos", "native", check_position)
end
mp.register_event("file-loaded", observe)