-- Copyright (c) 2023, Eisa AlAwadhi
-- License: BSD 2-Clause License
-- Creator: Eisa AlAwadhi
-- Project: SmartSkip
-- Version: 1.2
-- Date: 23-09-2023

-- Related forked projects:
--  https://github.com/detuur/mpv-scripts/blob/master/skiptosilence.lua
--  https://raw.githubusercontent.com/mpv-player/mpv/master/TOOLS/lua/autoload.lua
--  https://github.com/mar04/chapters_for_mpv
--  https://github.com/po5/chapterskip/blob/master/chapterskip.lua

local o = {
	-----Silence Skip Settings-----
	silence_audio_level = -40,
	silence_duration = 0.65,
	ignore_silence_duration = 5,
	min_skip_duration = 0,
	max_skip_duration = 130,
	keybind_twice_cancel_skip = true,
	silence_skip_to_end = "playlist-next",
	add_chapter_on_skip = true,
	force_mute_on_skip = false,
	-----Smart Skip Settings-----
	last_chapter_skip_behavior = [[ [ ["no-chapters", "silence-skip"], ["internal-chapters", "playlist-next"], ["external-chapters", "silence-skip"] ] ]],
	smart_next_proceed_countdown = true,
	smart_prev_cancel_countdown = true,
	-----Chapters Settings-----
	external_chapters_autoload = true,
	modified_chapters_autosave = [[ ["no-chapters", "external-chapters"] ]],
	global_chapters = true,
	global_chapters_path = "/:dir%mpvconf%/chapters",
	hash_global_chapters = true,
	add_chapter_ask_title = false,
	add_chapter_pause_for_input = false,
	add_chapter_placeholder_title = "Chapter ",
	-----Auto-Skip Settings-----
	autoskip_chapter = true,
	autoskip_countdown = 3,
	autoskip_countdown_bulk = false,
	autoskip_countdown_graceful = false,
	skip_once = false,
	categories = [[ [ ["internal-chapters", "prologue>Prologue/^Intro; opening>^OP/ OP$/^Opening; ending>^ED/ ED$/^Ending; preview>Preview$"], ["external-chapters", "idx->0/2"] ] ]],
	skip = [[ [ ["internal-chapters", "toggle;toggle_idx;opening;ending;preview"], ["external-chapters", "toggle;toggle_idx"] ] ]],
	-----Autoload Settings-----
	autoload_playlist = true,
	autoload_max_entries = 5000,
	autoload_max_dir_stack = 20,
	ignore_hidden = true,
	same_type = false,
	directory_mode = "auto",
	images = true,
	videos = true,
	audio = true,
	additional_image_exts = "",
	additional_video_exts = "",
	additional_audio_exts = "",
	-----OSD Messages Settings-----
	osd_duration = 2500,
	seek_osd = "osd-msg-bar",
	chapter_osd = "osd-msg-bar",
	autoskip_osd = "osd-msg-bar",
	playlist_osd = true,
	osd_msg = true,
	-----Keybind Settings-----
	toggle_autoload_keybind = [[ [""] ]],
	toggle_autoskip_keybind = [[ ["ctrl+."] ]],
	toggle_category_autoskip_keybind = [[ ["alt+."] ]],
	cancel_autoskip_countdown_keybind = [[ ["esc", "n"] ]],
	proceed_autoskip_countdown_keybind = [[ ["enter", "y"] ]],
	add_chapter_keybind = [[ ["n"] ]],
	remove_chapter_keybind = [[ ["alt+n"] ]],
	edit_chapter_keybind = [[ [""] ]],
	write_chapters_keybind = [[ ["ctrl+n"] ]],
	bake_chapters_keybind = [[ [""] ]],
	chapter_next_keybind = [[ ["ctrl+right"] ]],
	chapter_prev_keybind = [[ ["ctrl+left"] ]],
	smart_next_keybind = [[ [">"] ]],
	smart_prev_keybind = [[ ["<"] ]],
	silence_skip_keybind = [[ ["?"] ]],
}

local mp = require("mp")
local msg = require("mp.msg")
local utils = require("mp.utils")
local options = require("mp.options")
options.read_options(o, nil, function(list)
	split_option_exts(list.additional_video_exts, list.additional_audio_exts, list.additional_image_exts)
	if
		list.videos
		or list.additional_video_exts
		or list.audio
		or list.additional_audio_exts
		or list.images
		or list.additional_image_exts
	then
		create_extensions()
	end
	if list.directory_mode then
		validate_directory_mode()
	end
end)

if o.add_chapter_on_skip ~= false and o.add_chapter_on_skip ~= true then
	o.add_chapter_on_skip = utils.parse_json(o.add_chapter_on_skip)
end
if o.modified_chapters_autosave ~= false and o.modified_chapters_autosave ~= true then
	o.modified_chapters_autosave = utils.parse_json(o.modified_chapters_autosave)
end
o.last_chapter_skip_behavior = utils.parse_json(o.last_chapter_skip_behavior)
if utils.parse_json(o.skip) ~= nil then
	o.skip = utils.parse_json(o.skip)
end
if utils.parse_json(o.categories) ~= nil then
	o.categories = utils.parse_json(o.categories)
end
if o.skip_once ~= false and o.skip_once ~= true then
	o.skip_once = utils.parse_json(o.skip_once)
end

if o.global_chapters_path:match("/:dir%%mpvconf%%") then --1.2# add variables for specifying path via user-config
	o.global_chapters_path = o.global_chapters_path:gsub("/:dir%%mpvconf%%", mp.find_config_file("."))
elseif o.global_chapters_path:match("/:dir%%script%%") then
	o.global_chapters_path = o.global_chapters_path:gsub("/:dir%%script%%", debug.getinfo(1).source:match("@?(.*/)"))
elseif o.global_chapters_path:match("/:var%%(.*)%%") then
	local os_variable = o.global_chapters_path:match("/:var%%(.*)%%")
	o.global_chapters_path = o.global_chapters_path:gsub("/:var%%(.*)%%", os.getenv(os_variable))
end

o.toggle_autoload_keybind = utils.parse_json(o.toggle_autoload_keybind)
o.toggle_autoskip_keybind = utils.parse_json(o.toggle_autoskip_keybind)
o.cancel_autoskip_countdown_keybind = utils.parse_json(o.cancel_autoskip_countdown_keybind)
o.proceed_autoskip_countdown_keybind = utils.parse_json(o.proceed_autoskip_countdown_keybind)
o.toggle_category_autoskip_keybind = utils.parse_json(o.toggle_category_autoskip_keybind)
o.add_chapter_keybind = utils.parse_json(o.add_chapter_keybind)
o.remove_chapter_keybind = utils.parse_json(o.remove_chapter_keybind)
o.write_chapters_keybind = utils.parse_json(o.write_chapters_keybind)
o.edit_chapter_keybind = utils.parse_json(o.edit_chapter_keybind)
o.bake_chapters_keybind = utils.parse_json(o.bake_chapters_keybind)
o.chapter_prev_keybind = utils.parse_json(o.chapter_prev_keybind)
o.chapter_next_keybind = utils.parse_json(o.chapter_next_keybind)
o.smart_prev_keybind = utils.parse_json(o.smart_prev_keybind)
o.smart_next_keybind = utils.parse_json(o.smart_next_keybind)
o.silence_skip_keybind = utils.parse_json(o.silence_skip_keybind)

package.path = mp.command_native({ "expand-path", "~~/script-modules/?.lua;" }) .. package.path
local user_input_module, input = pcall(require, "user-input-module")

if o.osd_duration == -1 then
	o.osd_duration = (mp.get_property_number("osd-duration") or 1000)
end
local speed_state = 1
local pause_state = false
local mute_state = false
local sub_state = nil
local secondary_sub_state = nil
local vid_state = nil
local skip_flag = false
local window_state = nil
local force_silence_skip = false
local initial_skip_time = 0
local initial_chapter_count = 0
local chapter_state = "no-chapters"
local file_length = 0
local keep_open_state = "yes"
if mp.get_property("config") ~= "no" then
	keep_open_state = mp.get_property("keep-open")
end
local osd_duration_default = (mp.get_property_number("osd-duration") or 1000)
local autoload_playlist = o.autoload_playlist
local autoskip_chapter = o.autoskip_chapter
local playlist_osd = false
local autoskip_playlist_osd = false
local g_playlist_pos = 0
local g_opt_categories = o.categories
local g_opt_skip_once = false
o.autoskip_countdown = math.floor(o.autoskip_countdown)
local g_autoskip_countdown = o.autoskip_countdown
local g_autoskip_countdown_flag = false
local categories = {
	toggle = "",
	toggle_idx = "",
}
local autoskip_osd = o.autoskip_osd
if o.autoskip_osd == "osd-msg-bar" then
	autoskip_osd = "osd-bar"
end
if o.autoskip_osd == "osd-msg" then
	autoskip_osd = "no-osd"
end

-- utility functions --
function has_value(tab, val, array2d)
	if not tab then
		return msg.error("check value passed")
	end
	if not val then
		return msg.error("check value passed")
	end
	if not array2d then
		for index, value in ipairs(tab) do
			if string.lower(value) == string.lower(val) then
				return true
			end
		end
	end
	if array2d then
		for i = 1, #tab do
			if tab[i] and string.lower(tab[i][array2d]) == string.lower(val) then
				return true
			end
		end
	end

	return false
end

function esc_string(str)
	return str:gsub("([%p])", "%%%1")
end

function prompt_msg(text, duration)
	if not text then
		return
	end
	if not duration then
		duration = o.osd_duration
	end
	if o.osd_msg then
		mp.commandv("show-text", text, duration)
	end
	msg.info(text)
end

function bind_keys(keys, name, func, opts)
	if not keys then
		mp.add_forced_key_binding(keys, name, func, opts)
		return
	end

	for i = 1, #keys do
		if i == 1 then
			mp.add_forced_key_binding(keys[i], name, func, opts)
		else
			mp.add_forced_key_binding(keys[i], name .. i, func, opts)
		end
	end
end

function unbind_keys(keys, name)
	if not keys then
		mp.remove_key_binding(name)
		return
	end

	for i = 1, #keys do
		if i == 1 then
			mp.remove_key_binding(name)
		else
			mp.remove_key_binding(name .. i)
		end
	end
end

-- skip-silence utility functions --
function restoreProp(timepos, pause)
	if not timepos then
		timepos = mp.get_property_number("time-pos")
	end
	if not pause then
		pause = pause_state
	end

	mp.set_property("vid", vid_state)
	mp.set_property("force-window", window_state)
	mp.set_property_bool("mute", mute_state)
	mp.set_property("speed", speed_state)
	mp.unobserve_property(foundSilence)
	mp.command("no-osd af remove @skiptosilence")
	mp.set_property_bool("pause", pause)
	mp.set_property_number("time-pos", timepos)
	mp.set_property("sub-visibility", sub_state)
	mp.set_property("secondary-sub-visibility", secondary_sub_state)
	timer:kill()
	skip_flag = false
end

function handleMinMaxDuration(timepos)
	if not skip_flag then
		return
	end
	if not timepos then
		timepos = mp.get_property_number("time-pos")
	end

	skip_duration = timepos - initial_skip_time
	if o.min_skip_duration > 0 and skip_duration <= o.min_skip_duration then
		restoreProp(initial_skip_time)
		prompt_msg("Skipping Cancelled\nSilence less than minimum")
		return true
	end
	if o.max_skip_duration > 0 and skip_duration >= o.max_skip_duration then
		restoreProp(initial_skip_time)
		prompt_msg("Skipping Cancelled\nSilence is more than configured maximum")
		return true
	end
	return false
end

function setKeepOpenState()
	if o.silence_skip_to_end == "playlist-next" then
		mp.set_property("keep-open", "yes")
	else
		mp.set_property("keep-open", "always")
	end
end

function eofHandler(name, val)
	if val and skip_flag then
		if o.silence_skip_to_end == "playlist-next" then
			restoreProp((mp.get_property_native("duration") or 0))
			if mp.get_property_native("playlist-playing-pos") + 1 == mp.get_property_native("playlist-count") then
				prompt_msg("Skipped to end at " .. mp.get_property_osd("duration"))
			else
				mp.commandv("playlist-next")
			end
		elseif o.silence_skip_to_end == "cancel" then
			prompt_msg("Skipping Cancelled\nSilence not detected")
			restoreProp(initial_skip_time)
		elseif o.silence_skip_to_end == "pause" then
			prompt_msg("Skipped to end at " .. mp.get_property_osd("duration"))
			restoreProp((mp.get_property_native("duration") or 0), true)
		end
	end
end

-- smart-skip main code --
function smartNext()
	if g_autoskip_countdown_flag and o.smart_next_proceed_countdown then
		proceed_autoskip(true)
		return
	end
	local next_action = "silence-skip"
	local chapters_count = (mp.get_property_number("chapters") or 0)
	local chapter = (mp.get_property_number("chapter") or 0)
	local current_playlist = (mp.get_property_native("playlist-playing-pos") + 1 or 0)
	local total_playlist = (mp.get_property_native("playlist-count") or 0)

	if chapter + 2 <= chapters_count then
		next_action = "chapter-next"
	elseif
		chapter + 2 > chapters_count and (initial_chapter_count == 0 or chapters_count == 0 or force_silence_skip)
	then
		if chapters_count == 0 then
			force_silence_skip = true
		end
		next_action = "silence-skip"
	elseif chapter + 1 >= chapters_count then
		for i = 1, #o.last_chapter_skip_behavior do
			if o.last_chapter_skip_behavior[i] and o.last_chapter_skip_behavior[i][1] == chapter_state then
				next_action = o.last_chapter_skip_behavior[i][2]
				break
			end
		end
	end

	if next_action == "playlist-next" and current_playlist == total_playlist then
		next_action = "chapter-next"
	end

	if next_action == "silence-skip" then
		silenceSkip()
	end
	if next_action == "chapter-next" then
		mp.set_property("osd-duration", o.osd_duration)
		mp.commandv(o.chapter_osd, "add", "chapter", 1)
		mp.add_timeout(0.07, function()
			mp.set_property("osd-duration", osd_duration_default)
		end)
	end
	if next_action == "playlist-next" then
		mp.command("playlist_next")
	end
end

function smartPrev()
	if skip_flag then
		restoreProp(initial_skip_time)
		return
	end
	if g_autoskip_countdown_flag and o.smart_prev_cancel_countdown then
		kill_chapterskip_countdown("osd")
		return
	end
	local chapters_count = (mp.get_property_number("chapters") or 0)
	local chapter = (mp.get_property_number("chapter") or 0)
	local timepos = (mp.get_property_native("time-pos") or 0)

	if chapter - 1 < 0 and timepos > 1 and chapters_count == 0 then
		mp.commandv("seek", 0, "absolute", "exact")

		mp.set_property("osd-duration", o.osd_duration)
		mp.commandv(o.seek_osd, "show-progress")
		mp.add_timeout(0.07, function()
			mp.set_property("osd-duration", osd_duration_default)
		end)
	elseif chapter - 1 < 0 and timepos < 1 then
		mp.command("playlist_prev")
	elseif chapter - 1 <= chapters_count then
		mp.set_property("osd-duration", o.osd_duration)
		mp.commandv(o.chapter_osd, "add", "chapter", -1)
		mp.add_timeout(0.07, function()
			mp.set_property("osd-duration", osd_duration_default)
		end)
	end
end

-- chapter-next/prev main code --
function chapterSeek(direction)
	if skip_flag and direction == -1 then
		restoreProp(initial_skip_time)
		return
	end

	local chapters_count = (mp.get_property_number("chapters") or 0)
	local chapter = (mp.get_property_number("chapter") or 0)
	local timepos = (mp.get_property_native("time-pos") or 0)

	if chapter + direction < 0 and timepos > 1 and chapters_count == 0 then
		mp.commandv("seek", 0, "absolute", "exact")

		mp.set_property("osd-duration", o.osd_duration)
		mp.commandv(o.seek_osd, "show-progress")
		mp.add_timeout(0.07, function()
			mp.set_property("osd-duration", osd_duration_default)
		end)
	elseif chapter + direction < 0 and timepos < 1 then
		mp.command("playlist_prev")
	elseif chapter + direction >= chapters_count then
		mp.command("playlist_next")
	else
		mp.set_property("osd-duration", o.osd_duration)
		mp.commandv(o.chapter_osd, "add", "chapter", direction)
		mp.add_timeout(0.07, function()
			mp.set_property("osd-duration", osd_duration_default)
		end)
	end
end

-- silence skip main code --
function silenceSkip(action)
	if skip_flag then
		if o.keybind_twice_cancel_skip then
			restoreProp(initial_skip_time)
		end
		return
	end
	initial_skip_time = (mp.get_property_native("time-pos") or 0)
	if math.floor(initial_skip_time) == math.floor(mp.get_property_native("duration") or 0) then
		return
	end
	local width = mp.get_property_native("osd-width")
	local height = mp.get_property_native("osd-height")
	mp.set_property_native("geometry", ("%dx%d"):format(width, height))
	mp.commandv(o.seek_osd, "show-progress")

	mp.command(
		"no-osd af add @skiptosilence:lavfi=[silencedetect=noise="
			.. o.silence_audio_level
			.. "dB:d="
			.. o.silence_duration
			.. "]"
	)

	mp.observe_property("af-metadata/skiptosilence", "string", foundSilence)

	sub_state = mp.get_property("sub-visibility")
	mp.set_property("sub-visibility", "no")
	secondary_sub_state = mp.get_property("secondary-sub-visibility")
	mp.set_property("secondary-sub-visibility", "no")
	window_state = mp.get_property("force-window")
	mp.set_property("force-window", "yes")
	vid_state = mp.get_property("vid")
	mp.set_property("vid", "no")
	mute_state = mp.get_property_native("mute")
	if o.force_mute_on_skip then
		mp.set_property_bool("mute", true)
	end
	pause_state = mp.get_property_native("pause")
	mp.set_property_bool("pause", false)
	speed_state = mp.get_property_native("speed")
	mp.set_property("speed", 100)
	setKeepOpenState()
	skip_flag = true

	timer = mp.add_periodic_timer(0.5, function()
		local video_time = (mp.get_property_native("time-pos") or 0)
		handleMinMaxDuration(video_time)
		if skip_flag then
			mp.commandv(o.seek_osd, "show-progress")
		end
	end)
end

function foundSilence(name, value)
	if value == "{}" or value == nil then
		return
	end

	timecode = tonumber(string.match(value, "%d+%.?%d+"))
	if timecode == nil or timecode < initial_skip_time + o.ignore_silence_duration then
		return
	end

	if handleMinMaxDuration(timecode) then
		return
	end

	restoreProp(timecode)

	mp.add_timeout(0.05, function()
		prompt_msg("Skipped to silence 🕒 " .. mp.get_property_osd("time-pos"))
	end)
	if o.add_chapter_on_skip == true or has_value(o.add_chapter_on_skip, chapter_state) then
		mp.add_timeout(0.05, add_chapter)
	end
	skip_flag = false
end

-- modified fork of chapters_for_mpv --
--[[
Copyright (c) 2023 Mariusz Libera <mariusz.libera@gmail.com>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
--]]

-- to debug run mpv with arg: --msg-level=SmartSkip=debug
-- to test o.run mpv with arg: --script-opts=SmartSkip-OPTION=VALUE

local chapters_modified = false

msg.debug("options:", utils.to_string(options))

-- CHAPTER MANIPULATION --------------------------------------------------------

function change_title_callback(user_input, err, chapter_index)
	if user_input == nil or err ~= nil then
		msg.warn("no chapter title provided:", err)
		return
	end

	local chapter_list = mp.get_property_native("chapter-list")

	if chapter_index > mp.get_property_number("chapter-list/count") then
		msg.warn("can't set chapter title")
		return
	end

	chapter_list[chapter_index].title = user_input

	mp.set_property_native("chapter-list", chapter_list)
	chapters_modified = true
end

function edit_chapter()
	local mpv_chapter_index = mp.get_property_number("chapter")
	local chapter_list = mp.get_property_native("chapter-list")

	if mpv_chapter_index == nil or mpv_chapter_index == -1 then
		msg.verbose("no chapter selected, nothing to edit")
		return
	end

	if not user_input_module then
		msg.error("no mpv-user-input, can't get user input, install: https://github.com/CogentRedTester/mpv-user-input")
		return
	end
	input.get_user_input(change_title_callback, {
		request_text = "title of the chapter:",
		default_input = chapter_list[mpv_chapter_index + 1].title,
		cursor_pos = #chapter_list[mpv_chapter_index + 1].title + 1,
	}, mpv_chapter_index + 1)

	if o.add_chapter_pause_for_input then
		mp.set_property_bool("pause", true)
		mp.osd_message(" ", 0.1)
	end
end

function add_chapter(timepos)
	if not timepos then
		timepos = mp.get_property_number("time-pos")
	end
	local chapter_list = mp.get_property_native("chapter-list")

	if #chapter_list > 0 then
		for i = 1, #chapter_list do
			if math.floor(chapter_list[i].time) == math.floor(timepos) then
				msg.debug("failed to add chapter, chapter exists in same position")
				return
			end
		end
	end

	local chapter_index = (mp.get_property_number("chapter") or -1) + 2

	table.insert(chapter_list, chapter_index, { title = "", time = timepos })

	msg.debug("inserting new chapter at ", chapter_index, " chapter_", " time: ", timepos)

	mp.set_property_native("chapter-list", chapter_list)
	chapters_modified = true

	if o.add_chapter_ask_title then
		if not user_input_module then
			msg.error(
				"no mpv-user-input, can't get user input, install: https://github.com/CogentRedTester/mpv-user-input"
			)
			return
		end
		-- ask user for chapter title
		input.get_user_input(change_title_callback, {
			request_text = "title of the chapter:",
			default_input = o.placeholder_title .. chapter_index,
			cursor_pos = #(o.placeholder_title .. chapter_index) + 1,
		}, chapter_index)

		if o.add_chapter_pause_for_input then
			mp.set_property_bool("pause", true)
			-- FIXME: for whatever reason osd gets hidden when we pause the
			-- playback like that, workaround to make input prompt appear
			-- right away without requiring mouse or keyboard action
			mp.osd_message(" ", 0.1)
		end
	end
end

function remove_chapter()
	local chapter_count = mp.get_property_number("chapter-list/count")

	if chapter_count < 1 then
		msg.verbose("no chapters to remove")
		return
	end

	local chapter_list = mp.get_property_native("chapter-list")
	local current_chapter = mp.get_property_number("chapter") + 1

	table.remove(chapter_list, current_chapter)
	msg.debug("removing chapter", current_chapter)

	mp.set_property_native("chapter-list", chapter_list)
	chapters_modified = true
end

-- UTILITY FUNCTIONS -----------------------------------------------------------

function detect_os()
	if package.config:sub(1, 1) == "/" then
		return "unix"
	else
		return "windows"
	end
end

-- for unix use only
-- returns a table of command path and varargs, or nil if command was not found
function command_exists(command, ...)
	msg.debug("looking for command:", command)
	-- msg.debug("args:", )
	local process = mp.command_native({
		name = "subprocess",
		capture_stdout = true,
		capture_stderr = true,
		playback_only = false,
		args = { "sh", "-c", "command -v -- " .. command },
	})

	if process.status == 0 then
		local command_path = process.stdout:gsub("\n", "")
		msg.debug("command found:", command_path)
		return { command_path, ... }
	else
		msg.debug("command not found:", command)
		return nil
	end
end

function mkdir(path)
	local args = nil

	if detect_os() == "unix" then
		args = { "mkdir", "-p", "--", path }
	else
		args = { "powershell", "-NoProfile", "-Command", "mkdir", path }
	end

	local process = mp.command_native({
		name = "subprocess",
		playback_only = false,
		capture_stdout = true,
		capture_stderr = true,
		args = args,
	})

	if process.status == 0 then
		msg.debug("mkdir success:", path)
		return true
	else
		msg.error("mkdir failure:", path)
		return false
	end
end

-- returns md5 hash of the full path of the current media file
function hash()
	local path = mp.get_property("path")
	if path == nil then
		msg.debug("something is wrong with the path, can't get full_path, can't hash it")
		return
	end

	msg.debug("hashing:", path)

	local cmd = {
		name = "subprocess",
		capture_stdout = true,
		playback_only = false,
	}
	local args = nil

	if detect_os() == "unix" then
		local md5 = command_exists("md5sum")
			or command_exists("md5")
			or command_exists("openssl", "md5 | cut -d ' ' -f 2")
		if md5 == nil then
			msg.warn("no md5 command found, can't generate hash")
			return
		end
		md5 = table.concat(md5, " ")
		cmd["stdin_data"] = path
		args = { "sh", "-c", md5 .. " | cut -d ' ' -f 1 | tr '[:lower:]' '[:upper:]'" }
	else --windows
		-- https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.utility/get-filehash?view=powershell-7.3
		local hash_command = '$s = [System.IO.MemoryStream]::new(); $w = [System.IO.StreamWriter]::new($s); $w.write("'
			.. path
			.. '"); $w.Flush(); $s.Position = 0; Get-FileHash -Algorithm MD5 -InputStream $s | Select-Object -ExpandProperty Hash'
		args = { "powershell", "-NoProfile", "-Command", hash_command }
	end
	cmd["args"] = args
	msg.debug("hash cmd:", utils.to_string(cmd))
	local process = mp.command_native(cmd)

	if process.status == 0 then
		local hash = process.stdout:gsub("%s+", "")
		msg.debug("hash:", hash)
		return hash
	else
		msg.warn("hash function failed")
		return
	end
end

function construct_ffmetadata()
	local path = mp.get_property("path")
	if path == nil then
		msg.debug("something is wrong with the path, can't get full_path")
		return
	end

	local chapter_count = mp.get_property_number("chapter-list/count")
	local all_chapters = mp.get_property_native("chapter-list")

	local ffmetadata = ";FFMETADATA1\n;file=" .. path

	for i, c in ipairs(all_chapters) do
		local c_title = c.title
		local c_start = c.time * 1000000000
		local c_end

		if i < chapter_count then
			c_end = all_chapters[i + 1].time * 1000000000
		else
			c_end = (mp.get_property_number("duration") or c.time) * 1000000000
		end

		msg.debug(i, "c_title", c_title, "c_start:", c_start, "c_end", c_end)

		ffmetadata = ffmetadata .. "\n[CHAPTER]\nSTART=" .. c_start .. "\nEND=" .. c_end .. "\ntitle=" .. c_title
	end

	return ffmetadata
end

-- FILE IO ---------------------------------------------------------------------

-- args:
--      osd - if true, display an osd message
--      force -- if true write chapters file even if there are no changes
-- on success returns path of the chapters file, nil on failure
function write_chapters(...)
	local chapters_count = (mp.get_property_number("chapters") or 0)
	local osd, force = ...
	if not force and not chapters_modified then
		msg.debug("nothing to write")
		return
	end
	if initial_chapter_count == 0 and chapters_count == 0 then
		return
	end

	-- figure out the directory
	local chapters_dir
	if o.global_chapters then
		local dir = utils.file_info(o.global_chapters_path)
		if dir then
			if dir.is_dir then
				msg.debug("o.global_chapters_path exists:", o.global_chapters_path)
				chapters_dir = o.global_chapters_path
			else
				msg.error("o.global_chapters_path is not a directory")
				return
			end
		else
			msg.verbose("o.global_chapters_path doesn't exists:", o.global_chapters_path)
			if mkdir(o.global_chapters_path) then
				chapters_dir = o.global_chapters_path
			else
				return
			end
		end
	else
		chapters_dir = utils.split_path(mp.get_property("path"))
	end

	-- and the name
	local name = mp.get_property("filename")
	if o.hash_global_chapters and o.global_chapters then
		name = hash()
		if name == nil then
			msg.warn("hash function failed, fallback to filename")
			name = mp.get_property("filename")
		end
	end

	local chapters_file_path = utils.join_path(chapters_dir, name .. ".ffmetadata")
	--1.09#HERE I SHOULD ADD SOME SORT OF DELETE FUNCTION IN CASE CHAPTER COUNT IS 0
	msg.debug("opening for writing:", chapters_file_path)
	local chapters_file = io.open(chapters_file_path, "w")
	if chapters_file == nil then
		msg.error("could not open chapter file for writing")
		return
	end

	local success, error = chapters_file:write(construct_ffmetadata())
	chapters_file:close()

	if success then
		if osd then
			prompt_msg("Chapters written to:" .. chapters_file_path)
		end
		return chapters_file_path
	else
		msg.error("error writing chapters file:", error)
		return
	end
end

function load_chapters()
	local path = mp.get_property("path")
	local expected_chapters_file = utils.join_path(utils.split_path(path), mp.get_property("filename") .. ".ffmetadata")

	msg.debug("looking for:", expected_chapters_file)

	local file = utils.file_info(expected_chapters_file)

	if file then
		msg.debug("found in the local directory, loading..")
		mp.set_property("file-local-options/chapters-file", expected_chapters_file)
		chapter_state = "external-chapters"
		return
	end

	if not o.global_chapters then
		msg.debug("not in local, global chapters not enabled, aborting search")
		return
	end

	msg.debug("looking in the global directory")

	if o.hash_global_chapters then
		local hashed_path = hash()
		if hashed_path then
			expected_chapters_file = utils.join_path(o.global_chapters_path, hashed_path .. ".ffmetadata")
		else
			msg.debug("hash function failed, fallback to path")
			expected_chapters_file =
				utils.join_path(o.global_chapters_path, mp.get_property("filename") .. ".ffmetadata")
		end
	else
		expected_chapters_file = utils.join_path(o.global_chapters_path, mp.get_property("filename") .. ".ffmetadata")
	end

	msg.debug("looking for:", expected_chapters_file)

	file = utils.file_info(expected_chapters_file)

	if file then
		msg.debug("found in the global directory, loading..")
		mp.set_property("file-local-options/chapters-file", expected_chapters_file)
		chapter_state = "external-chapters"
		return
	end

	msg.debug("chapters file not found")
end

function bake_chapters()
	if mp.get_property_number("chapter-list/count") == 0 then
		msg.verbose("no chapters present")
		return
	end

	local chapters_file_path = write_chapters(false, true)
	if not chapters_file_path then
		msg.error("no chapters file")
		return
	end

	local filename = mp.get_property("filename")
	local output_name

	-- extract file extension
	local reverse_dot_index = filename:reverse():find(".", 1, true)
	if reverse_dot_index == nil then
		msg.warning("file has no extension, fallback to .mkv")
		output_name = filename .. ".chapters.mkv"
	else
		local dot_index = #filename + 1 - reverse_dot_index
		local ext = filename:sub(dot_index + 1)
		msg.debug("ext:", ext)
		if ext ~= "mkv" and ext ~= "mp4" and ext ~= "webm" then
			msg.debug("fallback to .mkv")
			ext = "mkv"
		end
		output_name = filename:sub(1, dot_index) .. "chapters." .. ext
	end

	local file_path = mp.get_property("path")
	local output_path = utils.join_path(utils.split_path(file_path), output_name)

	local args = {
		"ffmpeg",
		"-y",
		"-i",
		file_path,
		"-i",
		chapters_file_path,
		"-map_metadata",
		"1",
		"-codec",
		"copy",
		output_path,
	}

	msg.debug("args:", utils.to_string(args))

	local process = mp.command_native({
		name = "subprocess",
		playback_only = false,
		capture_stdout = true,
		capture_stderr = true,
		args = args,
	})

	if process.status == 0 then
		prompt_msg("file written to " .. output_path)
	else
		msg.error("failed to write file:\n", process.stderr)
	end
end

--modified fork of autoload script--
function toggle_autoload()
	if autoload_playlist == true then
		prompt_msg("○ Auto-Load Disabled")
		autoload_playlist = false
	elseif autoload_playlist == false then
		prompt_msg("● Auto-Load Enabled")
		autoload_playlist = true
	end
	if autoload_playlist then
		find_and_add_entries()
	end
end

function Set(t)
	local set = {}
	for _, v in pairs(t) do
		set[v] = true
	end
	return set
end

function SetUnion(a, b)
	for k in pairs(b) do
		a[k] = true
	end
	return a
end

function Split(s)
	local set = {}
	for v in string.gmatch(s, "([^,]+)") do
		set[v] = true
	end
	return set
end

EXTENSIONS_VIDEO = Set({
	"3g2",
	"3gp",
	"avi",
	"flv",
	"m2ts",
	"m4v",
	"mj2",
	"mkv",
	"mov",
	"mp4",
	"mpeg",
	"mpg",
	"ogv",
	"rmvb",
	"webm",
	"wmv",
	"y4m",
})

EXTENSIONS_AUDIO = Set({
	"aiff",
	"ape",
	"au",
	"flac",
	"m4a",
	"mka",
	"mp3",
	"oga",
	"ogg",
	"ogm",
	"opus",
	"wav",
	"wma",
})

EXTENSIONS_IMAGES = Set({
	"avif",
	"bmp",
	"gif",
	"j2k",
	"jp2",
	"jpeg",
	"jpg",
	"jxl",
	"png",
	"svg",
	"tga",
	"tif",
	"tiff",
	"webp",
})

function split_option_exts(video, audio, image)
	if video then
		o.additional_video_exts = Split(o.additional_video_exts)
	end
	if audio then
		o.additional_audio_exts = Split(o.additional_audio_exts)
	end
	if image then
		o.additional_image_exts = Split(o.additional_image_exts)
	end
end
split_option_exts(true, true, true)

function create_extensions()
	EXTENSIONS = {}
	if o.videos then
		SetUnion(SetUnion(EXTENSIONS, EXTENSIONS_VIDEO), o.additional_video_exts)
	end
	if o.audio then
		SetUnion(SetUnion(EXTENSIONS, EXTENSIONS_AUDIO), o.additional_audio_exts)
	end
	if o.images then
		SetUnion(SetUnion(EXTENSIONS, EXTENSIONS_IMAGES), o.additional_image_exts)
	end
end
create_extensions()

function validate_directory_mode()
	if o.directory_mode ~= "recursive" and o.directory_mode ~= "lazy" and o.directory_mode ~= "ignore" then
		o.directory_mode = nil
	end
end
validate_directory_mode()

function add_files(files)
	local oldcount = mp.get_property_number("playlist-count", 1)
	for i = 1, #files do
		mp.commandv("loadfile", files[i][1], "append")
		mp.commandv("playlist-move", oldcount + i - 1, files[i][2])
	end
end

function get_extension(path)
	match = string.match(path, "%.([^%.]+)$")
	if match == nil then
		return "nomatch"
	else
		return match
	end
end

table.filter = function(t, iter)
	for i = #t, 1, -1 do
		if not iter(t[i]) then
			table.remove(t, i)
		end
	end
end

table.append = function(t1, t2)
	local t1_size = #t1
	for i = 1, #t2 do
		t1[t1_size + i] = t2[i]
	end
end

-- alphanum sorting for humans in Lua
-- http://notebook.kulchenko.com/algorithms/alphanumeric-natural-sorting-for-humans-in-lua

function alphanumsort(filenames)
	local function padnum(n, d)
		return #d > 0 and ("%03d%s%.12f"):format(#n, n, tonumber(d) / (10 ^ #d)) or ("%03d%s"):format(#n, n)
	end

	local tuples = {}
	for i, f in ipairs(filenames) do
		tuples[i] = { f:lower():gsub("0*(%d+)%.?(%d*)", padnum), f }
	end
	table.sort(tuples, function(a, b)
		return a[1] == b[1] and #b[2] < #a[2] or a[1] < b[1]
	end)
	for i, tuple in ipairs(tuples) do
		filenames[i] = tuple[2]
	end
	return filenames
end

local autoloaded = nil
local added_entries = {}
local autoloaded_dir = nil

function scan_dir(path, current_file, dir_mode, separator, dir_depth, total_files, extensions)
	if dir_depth == o.autoload_max_dir_stack then
		return
	end
	msg.trace("scanning: " .. path)
	local files = utils.readdir(path, "files") or {}
	local dirs = dir_mode ~= "ignore" and utils.readdir(path, "dirs") or {}
	local prefix = path == "." and "" or path
	table.filter(files, function(v)
		-- The current file could be a hidden file, ignoring it doesn't load other
		-- files from the current directory.
		if o.ignore_hidden and not (prefix .. v == current_file) and string.match(v, "^%.") then
			return false
		end
		local ext = get_extension(v)
		if ext == nil then
			return false
		end
		return extensions[string.lower(ext)]
	end)
	table.filter(dirs, function(d)
		return not (o.ignore_hidden and string.match(d, "^%."))
	end)
	alphanumsort(files)
	alphanumsort(dirs)

	for i, file in ipairs(files) do
		files[i] = prefix .. file
	end

	table.append(total_files, files)
	if dir_mode == "recursive" then
		for _, dir in ipairs(dirs) do
			scan_dir(
				prefix .. dir .. separator,
				current_file,
				dir_mode,
				separator,
				dir_depth + 1,
				total_files,
				extensions
			)
		end
	else
		for i, dir in ipairs(dirs) do
			dirs[i] = prefix .. dir
		end
		table.append(total_files, dirs)
	end
end

function find_and_add_entries()
	local path = mp.get_property("path", "")
	local dir, filename = utils.split_path(path)
	msg.trace(("dir: %s, filename: %s"):format(dir, filename))
	if not autoload_playlist then
		msg.verbose("stopping: autoload_playlist is disabled")
		return
	elseif #dir == 0 then
		msg.verbose("stopping: not a local path")
		return
	end

	local pl_count = mp.get_property_number("playlist-count", 1)
	this_ext = get_extension(filename)
	-- check if this is a manually made playlist
	if (pl_count > 1 and autoloaded == nil) or (pl_count == 1 and EXTENSIONS[string.lower(this_ext)] == nil) then
		msg.verbose("stopping: manually made playlist")
		return
	else
		if pl_count == 1 then
			autoloaded = true
			autoloaded_dir = dir
			added_entries = {}
		end
	end

	local extensions = {}
	if o.same_type then
		if EXTENSIONS_VIDEO[string.lower(this_ext)] ~= nil then
			extensions = EXTENSIONS_VIDEO
		elseif EXTENSIONS_AUDIO[string.lower(this_ext)] ~= nil then
			extensions = EXTENSIONS_AUDIO
		else
			extensions = EXTENSIONS_IMAGES
		end
	else
		extensions = EXTENSIONS
	end

	local pl = mp.get_property_native("playlist", {})
	local pl_current = mp.get_property_number("playlist-pos-1", 1)
	msg.trace(("playlist-pos-1: %s, playlist: %s"):format(pl_current, utils.to_string(pl)))

	local files = {}
	do
		local dir_mode = o.directory_mode or mp.get_property("directory-mode", "lazy")
		local separator = mp.get_property_native("platform") == "windows" and "\\" or "/"
		scan_dir(autoloaded_dir, path, dir_mode, separator, 0, files, extensions)
	end

	if next(files) == nil then
		msg.verbose("no other files or directories in directory")
		return
	end

	-- Find the current pl entry (dir+"/"+filename) in the sorted dir list
	local current
	for i = 1, #files do
		if files[i] == path then
			current = i
			break
		end
	end
	if current == nil then
		return
	end
	msg.trace("current file position in files: " .. current)

	-- treat already existing playlist entries, independent of how they got added
	-- as if they got added by autoload
	for _, entry in ipairs(pl) do
		added_entries[entry.filename] = true
	end

	local append = { [-1] = {}, [1] = {} }
	for direction = -1, 1, 2 do -- 2 iterations, with direction = -1 and +1
		for i = 1, o.autoload_max_entries do
			local pos = current + i * direction
			local file = files[pos]
			if file == nil or file[1] == "." then
				break
			end

			-- skip files that are/were already in the playlist
			if not added_entries[file] then
				if direction == -1 then
					msg.info("Prepending " .. file)
					table.insert(append[-1], 1, { file, pl_current + i * direction + 1 })
				else
					msg.info("Adding " .. file)
					if pl_count > 1 then
						table.insert(append[1], { file, pl_current + i * direction - 1 })
					else
						mp.commandv("loadfile", file, "append")
					end
				end
			end
			added_entries[file] = true
		end
		if pl_count == 1 and direction == -1 and #append[-1] > 0 then
			for i = 1, #append[-1] do
				mp.commandv("loadfile", append[-1][i][1], "append")
			end
			mp.commandv("playlist-move", 0, current)
		end
	end

	if pl_count > 1 then
		add_files(append[1])
		add_files(append[-1])
	end
end

--modified fork of chapterskip.lua--

function matches(i, title)
	local opt_skip = o.skip
	if type(o.skip) == "table" then
		for i = 1, #o.skip do
			if o.skip[i] and o.skip[i][1] == chapter_state then
				opt_skip = o.skip[i][2]
				break
			end
		end
	end

	for category in string.gmatch(opt_skip, " *([^;]*[^; ]) *") do
		if categories[category:lower()] then
			if category:lower() == "idx-" or category:lower() == "toggle_idx" then
				for pattern in string.gmatch(categories[category:lower()], "([^/]+)") do
					if tonumber(pattern) == i then
						return true
					end
				end
			else
				if title then
					for pattern in string.gmatch(categories[category:lower()], "([^/]+)") do
						if string.match(title, pattern) then
							return true
						end
					end
				end
			end
		end
	end
end

local skipped = {}
local parsed = {}

function prep_chapterskip_var()
	if chapter_state == "no-chapters" then
		return
	end
	g_opt_categories = o.categories

	g_opt_skip_once = false
	if o.skip_once == true or o.skip_once == false then
		g_opt_skip_once = o.skip_once
	elseif has_value(o.skip_once, chapter_state) then
		g_opt_skip_once = true
	end

	if type(o.categories) == "table" then
		for i = 1, #o.categories do
			if o.categories[i] and o.categories[i][1] == chapter_state then
				g_opt_categories = o.categories[i][2]
				break
			end
		end
	end

	for category in string.gmatch(g_opt_categories, "([^;]+)") do
		local name, patterns = string.match(category, " *([^+>]*[^+> ]) *[+>](.*)")
		if name then
			categories[name:lower()] = patterns
		elseif not parsed[category] then
			mp.msg.warn("Improper category definition: " .. category)
		end
		parsed[category] = true
	end
end

function start_chapterskip_countdown(text, duration)
	g_autoskip_countdown_flag = true
	g_autoskip_countdown = g_autoskip_countdown - 1

	if o.autoskip_countdown_graceful and (g_autoskip_countdown <= 0) then
		kill_chapterskip_countdown()
		mp.osd_message("", 0)
		return
	end

	if g_autoskip_countdown < 0 then
		kill_chapterskip_countdown()
		mp.osd_message("", 0)
		return
	end

	text = text:gsub("%%countdown%%", g_autoskip_countdown)
	prompt_msg(text, 2000)
end

function kill_chapterskip_countdown(action)
	if not g_autoskip_countdown_flag then
		return
	end
	if action == "osd" and o.autoskip_osd ~= "no-osd" then
		prompt_msg("○ Auto-Skip Cancelled")
	end
	if g_autoskip_timer ~= nil then
		g_autoskip_timer:kill()
	end
	unbind_keys(o.cancel_autoskip_countdown_keybind, "cancel-autoskip-countdown")
	unbind_keys(o.proceed_autoskip_countdown_keybind, "proceed-autoskip-countdown")
	g_autoskip_countdown = o.autoskip_countdown
	g_autoskip_countdown_flag = false
end

function chapterskip(_, current, countdown)
	if chapter_state == "no-chapters" then
		return
	end
	if not autoskip_chapter then
		return
	end
	if g_autoskip_countdown_flag then
		kill_chapterskip_countdown("osd")
	end
	if not countdown then
		countdown = o.autoskip_countdown
	end

	local chapters = mp.get_property_native("chapter-list")
	local skip = false
	local consecutive_i = 0

	for i = 0, #chapters do
		if
			(not g_opt_skip_once or not skipped[i])
			and i == 0
			and chapters[i + 1]
			and matches(i, chapters[i + 1].title)
		then
			if i == current + 1 or skip == i - 1 then
				if skip then
					skipped[skip] = true
				end
				skip = i
				consecutive_i = consecutive_i + 1
			end
		elseif (not g_opt_skip_once or not skipped[i]) and chapters[i] and matches(i, chapters[i].title) then
			if i == current + 1 or skip == i - 1 then
				if skip then
					skipped[skip] = true
				end
				skip = i
				consecutive_i = consecutive_i + 1
			end
		elseif skip and countdown <= 0 then
			mp.set_property("osd-duration", o.osd_duration)
			mp.commandv(autoskip_osd, "show-progress")
			mp.add_timeout(0.07, function()
				mp.set_property("osd-duration", osd_duration_default)
			end)

			if o.autoskip_osd == "osd-msg-bar" or o.autoskip_osd == "osd-msg" then
				if consecutive_i > 1 then
					local autoskip_osd_string = ""
					for j = consecutive_i, 1, -1 do
						local chapter_title = ""
						if chapters[i - j] then
							chapter_title = chapters[i - j].title
						end
						autoskip_osd_string = (
							autoskip_osd_string
							.. "\n  ➤ Chapter ("
							.. i - j
							.. ") "
							.. chapter_title
						)
					end
					prompt_msg("● Auto-Skip" .. autoskip_osd_string)
				else
					prompt_msg("➤ Auto-Skip: Chapter " .. mp.command_native({ "expand-text", "${chapter}" }))
				end
			end
			mp.set_property("time-pos", chapters[i].time)
			skipped[skip] = true
			return
		elseif skip and countdown > 0 then
			g_autoskip_countdown_flag = true
			bind_keys(o.cancel_autoskip_countdown_keybind, "cancel-autoskip-countdown", function()
				kill_chapterskip_countdown("osd")
				return
			end)

			local autoskip_osd_string = ""
			local autoskip_graceful_osd = ""
			if o.autoskip_countdown_graceful then
				autoskip_graceful_osd = "Press Keybind to:\n"
			end
			if o.autoskip_osd == "osd-msg-bar" or o.autoskip_osd == "osd-msg" then
				if consecutive_i > 1 and o.autoskip_countdown_bulk then
					local autoskip_osd_string = ""
					for j = consecutive_i, 1, -1 do
						local chapter_title = ""
						if chapters[i - j] then
							chapter_title = chapters[i - j].title
						end
						autoskip_osd_string = (
							autoskip_osd_string
							.. "\n  ▷ Chapter ("
							.. i - j
							.. ") "
							.. chapter_title
						)
					end
					prompt_msg(
						autoskip_graceful_osd
							.. "○ Auto-Skip"
							.. ' in "'
							.. o.autoskip_countdown
							.. '"'
							.. autoskip_osd_string,
						2000
					)
					g_autoskip_timer = mp.add_periodic_timer(1, function()
						start_chapterskip_countdown(
							autoskip_graceful_osd .. "○ Auto-Skip" .. ' in "%countdown%"' .. autoskip_osd_string,
							2000
						)
					end)
				else
					prompt_msg(
						autoskip_graceful_osd
							.. '▷ Auto-Skip in "'
							.. o.autoskip_countdown
							.. '": Chapter '
							.. mp.command_native({ "expand-text", "${chapter}" }),
						2000
					)
					g_autoskip_timer = mp.add_periodic_timer(1, function()
						start_chapterskip_countdown(
							autoskip_graceful_osd
								.. '▷ Auto-Skip in "%countdown%": Chapter '
								.. mp.command_native({ "expand-text", "${chapter}" }),
							2000
						)
					end)
				end
			end
			function proceed_autoskip(force)
				if not g_autoskip_countdown_flag then
					kill_chapterskip_countdown()
					return
				end
				if g_autoskip_countdown > 1 and not force then
					return
				end

				mp.set_property("osd-duration", o.osd_duration)
				mp.commandv(autoskip_osd, "show-progress")
				mp.add_timeout(0.07, function()
					mp.set_property("osd-duration", osd_duration_default)
				end)
				if o.autoskip_osd == "osd-msg-bar" or o.autoskip_osd == "osd-msg" then
					if consecutive_i > 1 and o.autoskip_countdown_bulk then
						local autoskip_osd_string = ""
						for j = consecutive_i, 1, -1 do
							local chapter_title = ""
							if chapters[i - j] then
								chapter_title = chapters[i - j].title
							end
							autoskip_osd_string = (
								autoskip_osd_string
								.. "\n  ➤ Chapter ("
								.. i - j
								.. ") "
								.. chapter_title
							)
						end
						prompt_msg("● Auto-Skip" .. autoskip_osd_string)
					else
						prompt_msg("➤ Auto-Skip: Chapter " .. mp.command_native({ "expand-text", "${chapter}" }))
					end
				end
				if consecutive_i > 1 and o.autoskip_countdown_bulk then
					mp.set_property("time-pos", chapters[i].time)
				else
					mp.commandv("no-osd", "add", "chapter", 1)
				end
				skipped[skip] = true
				kill_chapterskip_countdown()
			end
			bind_keys(o.proceed_autoskip_countdown_keybind, "proceed-autoskip-countdown", function()
				proceed_autoskip(true)
				return
			end)
			if o.autoskip_countdown_graceful then
				return
			end
			mp.add_timeout(countdown, proceed_autoskip)
			return
		end
	end
	if skip and countdown <= 0 then
		if mp.get_property_native("playlist-count") == mp.get_property_native("playlist-pos-1") then
			return mp.set_property("time-pos", mp.get_property_native("duration"))
		end
		mp.commandv("playlist-next")
		if o.autoskip_osd ~= "no-osd" then
			autoskip_playlist_osd = true
		end
	elseif skip and countdown > 0 then
		g_autoskip_countdown_flag = true
		bind_keys(o.cancel_autoskip_countdown_keybind, "cancel-autoskip-countdown", function()
			kill_chapterskip_countdown("osd")
			return
		end)

		if o.autoskip_osd == "osd-msg-bar" or o.autoskip_osd == "osd-msg" then
			local autoskip_graceful_osd = ""
			if o.autoskip_countdown_graceful then
				autoskip_graceful_osd = "Press Keybind to:\n"
			end
			if consecutive_i > 1 and o.autoskip_countdown_bulk then
				local i = (mp.get_property_number("chapters") + 1 or 0)
				local autoskip_osd_string = ""
				for j = consecutive_i, 1, -1 do
					local chapter_title = ""
					if chapters[i - j] then
						chapter_title = chapters[i - j].title
					end
					autoskip_osd_string = (autoskip_osd_string .. "\n  ▷ Chapter (" .. i - j .. ") " .. chapter_title)
				end
				prompt_msg(
					autoskip_graceful_osd
						.. "○ Auto-Skip"
						.. ' in "'
						.. o.autoskip_countdown
						.. '"'
						.. autoskip_osd_string,
					2000
				)
				g_autoskip_timer = mp.add_periodic_timer(1, function()
					start_chapterskip_countdown(
						autoskip_graceful_osd .. "○ Auto-Skip" .. ' in "%countdown%"' .. autoskip_osd_string,
						2000
					)
				end)
			else
				prompt_msg(
					autoskip_graceful_osd
						.. '▷ Auto-Skip in "'
						.. o.autoskip_countdown
						.. '": Chapter '
						.. mp.command_native({ "expand-text", "${chapter}" }),
					2000
				)
				g_autoskip_timer = mp.add_periodic_timer(1, function()
					start_chapterskip_countdown(
						autoskip_graceful_osd
							.. '▷ Auto-Skip in "%countdown%": Chapter '
							.. mp.command_native({ "expand-text", "${chapter}" }),
						2000
					)
				end)
			end
		end
		function proceed_autoskip(force)
			if not g_autoskip_countdown_flag then
				return
			end
			if g_autoskip_countdown > 1 and not force then
				return
			end

			mp.set_property("osd-duration", o.osd_duration)
			mp.commandv(autoskip_osd, "show-progress")
			mp.add_timeout(0.07, function()
				mp.set_property("osd-duration", osd_duration_default)
			end)
			if consecutive_i > 1 and o.autoskip_countdown_bulk then
				if mp.get_property_native("playlist-count") == mp.get_property_native("playlist-pos-1") then
					return mp.set_property("time-pos", mp.get_property_native("duration"))
				end
				mp.commandv("playlist-next")
			else
				local current_chapter = (mp.get_property_number("chapter") + 1 or 0)
				local chapters_count = (mp.get_property_number("chapters") or 0)

				if current_chapter == chapters_count then
					if mp.get_property_native("playlist-count") == mp.get_property_native("playlist-pos-1") then
						return mp.set_property("time-pos", mp.get_property_native("duration"))
					end
					mp.commandv("playlist-next")
				else
					mp.commandv("no-osd", "add", "chapter", 1)
				end
			end
			if o.autoskip_osd ~= "no-osd" then
				autoskip_playlist_osd = true
			end
			kill_chapterskip_countdown()
		end
		bind_keys(o.proceed_autoskip_countdown_keybind, "proceed-autoskip-countdown", function()
			proceed_autoskip(true)
			return
		end)
		if o.autoskip_countdown_graceful then
			return
		end
		mp.add_timeout(countdown, proceed_autoskip)
	end
end

function toggle_autoskip()
	if autoskip_chapter == true then
		prompt_msg("○ Auto-Skip Disabled")
		autoskip_chapter = false
		if g_autoskip_countdown_flag then
			kill_chapterskip_countdown()
		end
	elseif autoskip_chapter == false then
		prompt_msg("● Auto-Skip Enabled")
		autoskip_chapter = true
	end
end

function toggle_category_autoskip()
	if chapter_state == "no-chapters" then
		return
	end
	if not mp.get_property_number("chapter") then
		return
	end
	local chapters = mp.get_property_native("chapter-list")
	local current_chapter = (mp.get_property_number("chapter") + 1 or 0)

	local chapter_title = tostring(current_chapter)
	if current_chapter > 0 and chapters[current_chapter].title and chapters[current_chapter].title ~= "" then
		chapter_title = chapters[current_chapter].title
	end

	local found_i = 0
	if matches(current_chapter, chapter_title) then
		for category in string.gmatch(g_opt_categories, "([^;]+)") do
			local name, patterns = string.match(category, " *([^+>]*[^+> ]) *[+>](.*)")

			for pattern in string.gmatch(patterns, "([^/]+)") do
				if string.match(chapter_title:lower(), pattern:lower()) then
					g_opt_categories = g_opt_categories:gsub(esc_string(pattern) .. "/?", "")
					found_i = found_i + 1
				end
			end
		end

		for category in string.gmatch(g_opt_categories, "([^;]+)") do
			local name, patterns = string.match(category, " *([^+>]*[^+> ]) *[+>](.*)")
			if name then
				categories[name:lower()] = patterns
			elseif not parsed[category] then
				mp.msg.warn("Improper category definition: " .. category)
			end
			parsed[category] = true
		end

		if type(o.categories) == "table" then
			for i = 1, #o.categories do
				if o.categories[i] and o.categories[i][1] == chapter_state then
					o.categories[i][2] = g_opt_categories
					break
				end
			end
		else
			o.categories = g_opt_categories
		end
	end
	if current_chapter > 0 and chapters[current_chapter].title and chapters[current_chapter].title ~= "" then
		if found_i > 0 or string.match(categories.toggle, esc_string(chapter_title)) then
			prompt_msg("○ Removed from Auto-Skip\n  ▷ Chapter: " .. chapter_title)
			categories.toggle = categories.toggle:gsub(esc_string("^" .. chapter_title .. "/"), "")
			if g_autoskip_countdown_flag then
				kill_chapterskip_countdown()
			end
		else
			prompt_msg("● Added to Auto-Skip\n  ➔ Chapter: " .. chapter_title)
			categories.toggle = categories.toggle .. "^" .. chapter_title .. "/"
		end
	else
		if found_i > 0 or string.match(categories.toggle_idx, esc_string(chapter_title)) then
			prompt_msg("○ Removed from Auto-Skip\n  ▷ Chapter: " .. chapter_title)
			categories.toggle_idx = categories.toggle_idx:gsub(esc_string(chapter_title .. "/"), "")
			if g_autoskip_countdown_flag then
				kill_chapterskip_countdown()
			end
		else
			prompt_msg("● Added to Auto-Skip\n  ➔ Chapter: " .. chapter_title)
			categories.toggle_idx = categories.toggle_idx .. chapter_title .. "/"
		end
	end
end

-- HOOKS --------------------------------------------------------------------
if user_input_module then
	mp.add_hook("on_unload", 50, function()
		input.cancel_user_input()
	end)
end -- chapters.lua
mp.register_event("start-file", find_and_add_entries) -- autoload.lua
mp.observe_property("chapter", "number", chapterskip) -- chapterskip.lua

-- smart skip events / properties / hooks --

mp.register_event("file-loaded", function()
	file_length = (mp.get_property_native("duration") or 0)
	if o.playlist_osd and g_playlist_pos > 0 then
		playlist_osd = true
	end
	if playlist_osd and not autoskip_playlist_osd then
		prompt_msg(
			"["
				.. mp.command_native({ "expand-text", "${playlist-pos-1}" })
				.. "/"
				.. mp.command_native({ "expand-text", "${playlist-count}" })
				.. "] "
				.. mp.command_native({ "expand-text", "${filename}" })
		)
	end
	if autoskip_playlist_osd then
		prompt_msg(
			"➤ Auto-Skip\n["
				.. mp.command_native({ "expand-text", "${playlist-pos-1}" })
				.. "/"
				.. mp.command_native({ "expand-text", "${playlist-count}" })
				.. "] "
				.. mp.command_native({ "expand-text", "${filename}" })
		)
	end
	playlist_osd = false
	autoskip_playlist_osd = false
	force_silence_skip = false
	skipped = {}
	initial_chapter_count = mp.get_property_number("chapter-list/count")
	if initial_chapter_count > 0 and chapter_state ~= "external-chapters" then
		chapter_state = "internal-chapters"
	end
	prep_chapterskip_var()
end)

mp.add_hook("on_load", 50, function()
	if o.external_chapters_autoload then
		load_chapters()
	end
end)

mp.observe_property("pause", "bool", function(name, value)
	if value and skip_flag then
		restoreProp(initial_skip_time, true)
	end
	if g_autoskip_countdown_flag then
		kill_chapterskip_countdown("osd")
	end
end)

mp.add_hook("on_unload", 9, function()
	if o.modified_chapters_autosave == true or has_value(o.modified_chapters_autosave, chapter_state) then
		write_chapters(false)
	end
	mp.set_property("keep-open", keep_open_state)
	chapter_state = "no-chapters"
	g_playlist_pos = (mp.get_property_native("playlist-playing-pos") + 1 or 0)
	kill_chapterskip_countdown()
end)

mp.register_event("seek", function()
	if g_autoskip_countdown_flag then
		kill_chapterskip_countdown("osd")
	end
end)

mp.observe_property("eof-reached", "bool", eofHandler)

-- BINDINGS --------------------------------------------------------------------

bind_keys(o.toggle_autoload_keybind, "toggle-autoload", toggle_autoload)
bind_keys(o.toggle_autoskip_keybind, "toggle-autoskip", toggle_autoskip)
bind_keys(o.toggle_category_autoskip_keybind, "toggle-category-autoskip", toggle_category_autoskip)
bind_keys(o.add_chapter_keybind, "add-chapter", add_chapter)
bind_keys(o.remove_chapter_keybind, "remove-chapter", remove_chapter)
bind_keys(o.write_chapters_keybind, "write-chapters", function()
	write_chapters(true)
end)
bind_keys(o.edit_chapter_keybind, "edit-chapter", edit_chapter)
bind_keys(o.bake_chapters_keybind, "bake-chapters", bake_chapters)
bind_keys(o.chapter_prev_keybind, "chapter-prev", function()
	chapterSeek(-1)
end)
bind_keys(o.chapter_next_keybind, "chapter-next", function()
	chapterSeek(1)
end)
bind_keys(o.smart_prev_keybind, "smart-prev", smartPrev)
bind_keys(o.smart_next_keybind, "smart-next", smartNext)
bind_keys(o.silence_skip_keybind, "silence-skip", silenceSkip)