---@alias OpenCommandMenuOptions {submenu?: string; mouse_nav?: boolean; on_close?: string | string[]}
---@param data MenuData
---@param opts? OpenCommandMenuOptions
function open_command_menu(data, opts)
	opts = opts or {}
	local menu

	local function run_command(command)
		if type(command) == 'table' then
			---@diagnostic disable-next-line: deprecated
			mp.commandv(unpack(command))
		else
			mp.command(tostring(command))
		end
	end

	local function callback(event)
		if type(menu.root.callback) == 'table' then
			---@diagnostic disable-next-line: deprecated
			mp.commandv(unpack(itable_join({'script-message-to'}, menu.root.callback, {utils.format_json(event)})))
		elseif event.type == 'activate' then
			-- Modifiers and actions are not available on basic non-callback mode menus.
			-- `alt` modifier should activate without closing the menu.
			if (event.modifiers == 'alt' or not event.modifiers) and not event.action then
				run_command(event.value)
			end
			-- Convention: Only pure item activations should close the menu.
			-- Using modifiers or triggering item actions should not.
			if not event.keep_open and not event.modifiers and not event.action then
				menu:close()
			end
		end
	end

	---@type MenuOptions
	local menu_opts = table_assign_props({}, opts, {'mouse_nav'})
	menu = Menu:open(data, callback, menu_opts)
	if opts.submenu then menu:activate_menu(opts.submenu) end
	return menu
end

---@param opts? OpenCommandMenuOptions
function toggle_menu_with_items(opts)
	if Menu:is_open('menu') then
		Menu:close()
	else
		open_command_menu({type = 'menu', items = get_menu_items(), search_submenus = true}, opts)
	end
end

---@alias TrackEventRemove {type: 'remove' | 'delete', index: number; value: any;}
---@alias TrackEventReload {type: 'reload', index: number; value: any;}
---@param opts {type: string; title: string; list_prop: string; active_prop?: string; footnote?: string; serializer: fun(list: any, active: any): MenuDataItem[]; actions?: MenuAction[]; actions_place?: 'inside'|'outside'; on_paste: fun(event: MenuEventPaste); on_move?: fun(event: MenuEventMove); on_activate?: fun(event: MenuEventActivate); on_remove?: fun(event: TrackEventRemove); on_delete?: fun(event: TrackEventRemove); on_reload?: fun(event: TrackEventReload); on_key?: fun(event: MenuEventKey, close: fun())}
function create_self_updating_menu_opener(opts)
	return function()
		if Menu:is_open(opts.type) then
			Menu:close()
			return
		end
		local list = mp.get_property_native(opts.list_prop)
		local active = opts.active_prop and mp.get_property_native(opts.active_prop) or nil
		local menu

		local function update() menu:update_items(opts.serializer(list, active)) end

		local ignore_initial_list = true
		local function handle_list_prop_change(name, value)
			if ignore_initial_list then
				ignore_initial_list = false
			else
				list = value
				update()
			end
		end

		local ignore_initial_active = true
		local function handle_active_prop_change(name, value)
			if ignore_initial_active then
				ignore_initial_active = false
			else
				active = value
				update()
			end
		end

		local function cleanup_and_close()
			mp.unobserve_property(handle_list_prop_change)
			mp.unobserve_property(handle_active_prop_change)
			menu:close()
		end

		local initial_items, selected_index = opts.serializer(list, active)

		---@type MenuAction[]
		local actions = opts.actions or {}
		if opts.on_move then
			actions[#actions + 1] = {
				name = 'move_up',
				icon = 'arrow_upward',
				label = t('Move up') .. ' (ctrl+up/pgup/home)',
				filter_hidden = true,
			}
			actions[#actions + 1] = {
				name = 'move_down',
				icon = 'arrow_downward',
				label = t('Move down') .. ' (ctrl+down/pgdwn/end)',
				filter_hidden = true,
			}
		end
		if opts.on_reload then
			actions[#actions + 1] = {name = 'reload', icon = 'refresh', label = t('Reload') .. ' (f5)'}
		end
		if opts.on_remove or opts.on_delete then
			local label = (opts.on_remove and t('Remove') or t('Delete')) .. ' (del)'
			if opts.on_remove and opts.on_delete then
				label = t('Remove') .. ' (' .. t('%s to delete', 'del, ctrl+del') .. ')'
			end
			actions[#actions + 1] = {name = 'remove', icon = 'delete', label = label}
		end

		function remove_or_delete(index, value, menu_id, modifiers)
			if opts.on_remove and opts.on_delete then
				local method = modifiers == 'ctrl' and 'delete' or 'remove'
				local handler = method == 'delete' and opts.on_delete or opts.on_remove
				if handler then
					handler({type = method, value = value, index = index})
				end
			elseif opts.on_remove or opts.on_delete then
				local method = opts.on_delete and 'delete' or 'remove'
				local handler = opts.on_delete or opts.on_remove
				if handler then
					handler({type = method, value = value, index = index})
				end
			end
		end

		-- Items and active_index are set in the handle_prop_change callback, since adding
		-- a property observer triggers its handler immediately, we just let that initialize the items.
		menu = Menu:open({
			type = opts.type,
			title = opts.title,
			footnote = opts.footnote,
			items = initial_items,
			item_actions = actions,
			item_actions_place = opts.actions_place,
			selected_index = selected_index,
			on_move = opts.on_move and 'callback' or nil,
			on_paste = opts.on_paste and 'callback' or nil,
		}, function(event)
			if event.type == 'activate' then
				if (event.action == 'move_up' or event.action == 'move_down') and opts.on_move then
					local to_index = event.index + (event.action == 'move_up' and -1 or 1)
					if to_index >= 1 and to_index <= #menu.current.items then
						opts.on_move({
							type = 'move',
							from_index = event.index,
							to_index = to_index,
							menu_id = menu.current.id,
						})
						menu:select_index(to_index)
						if not event.is_pointer then
							menu:scroll_to_index(to_index, nil, true)
						end
					end
				elseif event.action == 'reload' and opts.on_reload then
					opts.on_reload({type = 'reload', index = event.index, value = event.value})
				elseif event.action == 'remove' and (opts.on_remove or opts.on_delete) then
					remove_or_delete(event.index, event.value, event.menu_id, event.modifiers)
				else
					opts.on_activate(event --[[@as MenuEventActivate]])
					if not event.modifiers and not event.action then cleanup_and_close() end
				end
			elseif event.type == 'key' then
				local item = event.selected_item
				if event.id == 'enter' then
					-- We get here when there's no selectable item in menu and user presses enter.
					cleanup_and_close()
				elseif event.key == 'f5' and opts.on_reload and item then
					opts.on_reload({type = 'reload', index = item.index, value = item.value})
				elseif event.key == 'del' and (opts.on_remove or opts.on_delete) and item then
					if itable_has({nil, 'ctrl'}, event.modifiers) then
						remove_or_delete(item.index, item.value, event.menu_id, event.modifiers)
					end
				elseif opts.on_key then
					opts.on_key(event --[[@as MenuEventKey]], cleanup_and_close)
				end
			elseif event.type == 'paste' and opts.on_paste then
				opts.on_paste(event --[[@as MenuEventPaste]])
			elseif event.type == 'close' then
				cleanup_and_close()
			elseif event.type == 'move' and opts.on_move then
				opts.on_move(event --[[@as MenuEventMove]])
			elseif event.type == 'remove' and opts.on_move then
			end
		end)

		mp.observe_property(opts.list_prop, 'native', handle_list_prop_change)
		if opts.active_prop then
			mp.observe_property(opts.active_prop, 'native', handle_active_prop_change)
		end
	end
end

---@param opts {title: string; type: string; prop: string; enable_prop?: string; secondary?: {prop: string; icon: string; enable_prop?: string}; load_command: string; download_command?: string}
function create_select_tracklist_type_menu_opener(opts)
	local snd = opts.secondary
	local function get_props()
		return tonumber(mp.get_property(opts.prop)), snd and tonumber(mp.get_property(snd.prop)) or nil
	end

	local function escape_codec(str)
		if not str or str == '' then return '' end
	
		local codec_map = {
			mpeg2 = "mpeg2",
			dvvideo = "dv",
			pcm = "pcm",
			pgs = "pgs",
			subrip = "srt",
			vtt = "vtt",
			dvd_sub = "vob",
			dvb_sub = "dvb",
			dvb_tele = "teletext",
			arib = "arib"
		}
	
		for key, value in pairs(codec_map) do
			if str:find(key) then
				return value
			end
		end
	
		return str
	end

	local function serialize_tracklist(tracklist)
		local items = {}

		if opts.load_command then
			items[#items + 1] = {
				title = t('Load'),
				bold = true,
				italic = true,
				hint = t('open file'),
				value = '{load}',
				actions = opts.download_command
					and {{name = 'download', icon = 'language', label = t('Search online')}}
					or nil,
			}
		end
		if #items > 0 then
			items[#items].separator = true
		end

		local track_prop_index, snd_prop_index = get_props()
		local filename = mp.get_property_native('filename/no-ext')
		local escaped_filename = filename and regexp_escape(filename)
		local first_item_index = #items + 1
		local active_index = nil
		local disabled_item = nil
		local track_actions = nil
		local track_external_actions = {}

		if snd then
			local action = {
				name = 'as_secondary', icon = snd.icon, label = t('Use as secondary') .. ' (shift+enter/click)',
			}
			track_actions = {action}
			table.insert(track_external_actions, action)
		end
		table.insert(track_external_actions, {name = 'reload', icon = 'refresh', label = t('Reload') .. ' (f5)'})
		table.insert(track_external_actions, {name = 'remove', icon = 'delete', label = t('Remove') .. ' (del)'})

		for _, track in ipairs(tracklist) do
			if track.type == opts.type then
				local hint_values = {}
				local track_selected = track.selected and track.id == track_prop_index
				local snd_selected = snd and track.id == snd_prop_index
				local function h(value)
					value = trim(value)
					if #value > 0 then hint_values[#hint_values + 1] = value end
				end

				if track.lang then h(track.lang) end
				if track['demux-h'] then
					h(track['demux-w'] and (track['demux-w'] .. 'x' .. track['demux-h']) or (track['demux-h'] .. 'p'))
				end
				if track['demux-fps'] then h(string.format('%.5g fps', track['demux-fps'])) end
				if track['codec'] then h(escape_codec(track.codec)) end
				if track['audio-channels'] then
					h(track['audio-channels'] == 1
						and t('%s channel', track['audio-channels'])
						or t('%s channels', track['audio-channels']))
				end
				if track['demux-samplerate'] then h(string.format('%.3g kHz', track['demux-samplerate'] / 1000)) end
				if track['demux-bitrate'] then h(string.format('%.0f kbps', track['demux-bitrate'] / 1000)) end
				if track.forced then h(t('forced')) end
				if track.default then h(t('default')) end
				if track.external then
					local extension = track.title:match('%.([^%.]+)$')
					if track.title and escaped_filename and extension then
						track.title = trim(track.title:gsub(escaped_filename .. '%.?', ''):gsub('%.?([^%.]+)$', ''))
						if track.title == '' or track.lang and track.title:lower() == track.lang:lower() then
							track.title = nil
						end
					end
					h(t('external'))
				end

				items[#items + 1] = {
					title = (track.title and track.title or t('Track %s', track.id)),
					hint = table.concat(hint_values, ', '),
					value = track.id,
					active = track_selected or snd_selected,
					italic = snd_selected,
					icon = snd and snd_selected and snd.icon or nil,
					actions = track.external and track_external_actions or track_actions,
				}

				if track_selected then
					if disabled_item then disabled_item.active = false end
					active_index = #items
				end
			end
		end

		return items, active_index or first_item_index
	end

	local function reload(id)
		if id then mp.commandv(opts.type .. '-reload', id) end
	end
	local function remove(id)
		if id then mp.commandv(opts.type .. '-remove', id) end
	end

	---@param event MenuEventActivate
	local function handle_activate(event)
		if event.value == '{load}' then
			mp.command(event.action == 'download' and opts.download_command or opts.load_command)
		else
			if snd and (event.action == 'as_secondary' or event.modifiers == 'shift') then
				local _, snd_track_index = get_props()
				mp.commandv('set', snd.prop, event.value == snd_track_index and 'no' or event.value)
				if snd.enable_prop then
					mp.commandv('set', snd.enable_prop, 'yes')
				end
			elseif event.action == 'reload' then
				reload(event.value)
			elseif event.action == 'remove' then
				remove(event.value)
			elseif not event.modifiers or event.modifiers == 'alt' then
				mp.commandv('set', opts.prop, event.value == get_props() and 'no' or event.value)
				if opts.enable_prop then
					mp.commandv('set', opts.enable_prop, 'yes')
				end
			end
		end
	end

	---@param event MenuEventKey
	local function handle_key(event)
		if event.selected_item then
			if event.id == 'f5' then
				reload(event.selected_item.value)
			elseif event.id == 'del' then
				remove(event.selected_item.value)
			end
		end
	end

	return create_self_updating_menu_opener({
		title = opts.title,
		footnote = t('Toggle to disable.') .. ' ' .. t('Paste path or url to add.'),
		type = opts.type,
		list_prop = 'track-list',
		serializer = serialize_tracklist,
		on_activate = handle_activate,
		on_key = handle_key,
		actions_place = 'outside',
		on_paste = function(event) load_track(opts.type, event.value) end,
	})
end

---@alias NavigationMenuOptions {type: string, title?: string, allowed_types?: string[], file_actions?: MenuAction[], directory_actions?: MenuAction[], active_path?: string, selected_path?: string; on_close?: fun()}

-- Opens a file navigation menu with items inside `directory_path`.
---@param directory_path string
---@param handle_activate fun(event: MenuEventActivate)
---@param opts NavigationMenuOptions
function open_file_navigation_menu(directory_path, handle_activate, opts)
	if directory_path == '{drives}' then
		if state.platform ~= 'windows' then directory_path = '/' end
	else
		directory_path = normalize_path(mp.command_native({'expand-path', directory_path}))
	end

	opts = opts or {}
	---@type string|nil
	local current_directory = nil
	---@type Menu
	local menu
	---@type string | nil
	local back_path
	local separator = path_separator(directory_path)

	---@param path string Can be path to a directory, or special string `'{drives}'` to get windows drives items.
	---@param selected_path? string Marks item with this path as active.
	---@return MenuStackChild[] menu_items
	---@return number selected_index
	---@return string|nil error
	local function serialize_items(path, selected_path)
		if path == '{drives}' then
			local process = mp.command_native({
				name = 'subprocess',
				capture_stdout = true,
				playback_only = false,
				args = {'fsutil', 'fsinfo', 'drives'},
			})
			local items, selected_index = {}, 1

			if process.status == 0 then
				for drive in process.stdout:gmatch('(%a:)\\') do
					if drive then
						local drive_path = normalize_path(drive)
						items[#items + 1] = {
							title = drive, hint = t('drive'), value = drive_path, active = opts.active_path == drive_path,
						}
						if selected_path == drive_path then selected_index = #items end
					end
				end
			else
				return {}, 1, 'Couldn\'t open drives. Error: ' .. utils.to_string(process.stderr)
			end
			return items, selected_index
		end

		local serialized = serialize_path(path)
		if not serialized then
			return {}, 0, 'Couldn\'t serialize path "' .. path .. '.'
		end
		local files, directories, error = read_directory(serialized.path, {
			types = opts.allowed_types,
			hidden = options.show_hidden_files,
		})
		if error then
			return {}, 1, error
		end
		local is_root = not serialized.dirname

		if not files or not directories then return {}, 0 end

		sort_strings(directories)
		sort_strings(files)

		-- Pre-populate items with parent directory selector if not at root
		-- Each item value is a serialized path table it points to.
		local items = {}

		if is_root then
			if state.platform == 'windows' then
				items[#items + 1] = {title = '..', hint = t('Drives'), value = '{drives}', separator = true, is_to_parent = true}
			end
		else
			items[#items + 1] = {title = '..', hint = t('parent dir'), value = serialized.dirname, separator = true, is_to_parent = true}
		end

		back_path = items[#items] and items[#items].value
		local selected_index = #items + 1

		for _, dir in ipairs(directories) do
			items[#items + 1] = {
				title = dir .. ' ' .. separator,
				value = join_path(path, dir),
				bold = true,
				actions = opts
					.directory_actions,
			}
		end

		for _, file in ipairs(files) do
			items[#items + 1] = {title = file, value = join_path(path, file), actions = opts.file_actions}
		end

		for index, item in ipairs(items) do
			if not item.is_to_parent then
				if opts.active_path == item.value then
					item.active = true
					if not selected_path then selected_index = index end
				end

				if selected_path == item.value then selected_index = index end
			end
		end

		return items, selected_index
	end

	local menu_data = {
		type = opts.type,
		title = opts.title or '',
		footnote = t('%s to go up in tree.', 'alt+up') .. ' ' .. t('Paste path or url to open.'),
		items = {},
		on_paste = 'callback',
	}

	---@param path string
	local function open_directory(path)
		local items, selected_index, error = serialize_items(path, current_directory)
		if error then
			msg.error(error)
			items = {{title = 'Something went wrong. See console for errors.', selectable = false, muted = true}}
		end

		local title = opts.title
		if not title then
			if path == '{drives}' then
				title = 'Drives'
			else
				local serialized = serialize_path(path)
				title = serialized and serialized.basename .. separator or '??'
			end
		end

		current_directory = path
		menu_data.title = title
		menu_data.items = items
		menu:search_cancel()
		menu:update(menu_data)
		menu:select_index(selected_index)
		menu:scroll_to_index(selected_index, nil, true)
	end

	local function close()
		menu:close()
		if opts.on_close then opts.on_close() end
	end

	---@param event MenuEventActivate
	---@param only_if_dir? boolean Activate item only if it's a directory.
	local function activate(event, only_if_dir)
		local path = event.value
		local is_drives = path == '{drives}'

		if is_drives then
			open_directory(path)
			return
		end

		local info, error = utils.file_info(path)

		if not info then
			msg.error('Can\'t retrieve path info for "' .. path .. '". Error: ' .. (error or ''))
			return
		end

		if info.is_dir and not event.modifiers and not event.action then
			open_directory(path)
		elseif not only_if_dir then
			handle_activate(event)
		end
	end

	menu = Menu:open(menu_data, function(event)
		if event.type == 'activate' then
			activate(event --[[@as MenuEventActivate]])
		elseif event.type == 'back' or event.type == 'key' and itable_has({'alt+up', 'left'}, event.id) then
			if back_path then open_directory(back_path) end
		elseif event.type == 'paste' then
			handle_activate({type = 'activate', value = event.value})
		elseif event.type == 'key' then
			if event.id == 'right' then
				local selected_item = event.selected_item
				if selected_item then
					activate(table_assign({}, selected_item, {type = 'activate'}), true)
				end
			elseif event.id == 'ctrl+c' and event.selected_item then
				set_clipboard(event.selected_item.value)
			end
		elseif event.type == 'close' then
			close()
		end
	end)

	open_directory(directory_path)

	return menu
end

-- On demand menu items loading
do
	---@type {key: string; cmd: string; comment: string; is_menu_item: boolean}[]|nil
	local all_user_bindings = nil
	---@type MenuStackItem[]|nil
	local menu_items = nil

	local function is_uosc_menu_comment(v) return v:match('^!') or v:match('^menu:') end

	-- Returns all relevant bindings from `input.conf`, even if they are overwritten
	-- (same key bound to something else later) or have no keys (uosc menu items).
	function get_all_user_bindings()
		if all_user_bindings then return all_user_bindings end
		all_user_bindings = {}

		local input_conf_property = mp.get_property_native('input-conf')
		local input_conf_iterator
		if input_conf_property:sub(1, 9) == 'memory://' then
			-- mpv.net v7
			local input_conf_lines = split(input_conf_property:sub(10), '\n')
			local i = 0
			input_conf_iterator = function()
				i = i + 1
				return input_conf_lines[i]
			end
		else
			local input_conf = input_conf_property == '' and '~~/input.conf' or input_conf_property
			local input_conf_path = mp.command_native({'expand-path', input_conf})
			local input_conf_meta, meta_error = utils.file_info(input_conf_path)

			-- File doesn't exist
			if not input_conf_meta or not input_conf_meta.is_file then
				menu_items = create_default_menu_items()
				return menu_items, all_user_bindings
			end

			input_conf_iterator = io.lines(input_conf_path)
		end

		for line in input_conf_iterator do
			local key, command, comment = string.match(line, '%s*([%S]+)%s+([^#]*)%s*(.-)%s*$')
			local is_commented_out = key and key:sub(1, 1) == '#'

			if comment and #comment > 0 then comment = comment:sub(2) end
			if command then command = trim(command) end

			local is_menu_item = comment and is_uosc_menu_comment(comment)

			if key
				-- Filter out stuff like `#F2`, which is clearly intended to be disabled
				and not (is_commented_out and #key > 1)
				-- Filter out comments that are not uosc menu items
				and (not is_commented_out or is_menu_item) then
				all_user_bindings[#all_user_bindings + 1] = {
					key = key,
					cmd = command,
					comment = comment or '',
					is_menu_item = is_menu_item,
				}
			end
		end

		return all_user_bindings
	end

	function get_menu_items()
		if menu_items then return menu_items end

		local all_user_bindings = get_all_user_bindings()
		local main_menu = {items = {}, items_by_command = {}}
		local by_id = {}

		for _, bind in ipairs(all_user_bindings) do
			local key, command, comment = bind.key, bind.cmd, bind.comment
			local title = ''

			if comment then
				local comments = split(comment, '#')
				local titles = itable_filter(comments, is_uosc_menu_comment)
				if titles and #titles > 0 then
					title = titles[1]:match('^!%s*(.*)%s*') or titles[1]:match('^menu:%s*(.*)%s*')
				end
			end

			if title ~= '' then
				local is_dummy = key:sub(1, 1) == '#'
				local submenu_id = ''
				local target_menu = main_menu
				local title_parts = split(title or '', ' *> *')

				for index, title_part in ipairs(#title_parts > 0 and title_parts or {''}) do
					if index < #title_parts then
						submenu_id = submenu_id .. title_part

						if not by_id[submenu_id] then
							local items = {}
							by_id[submenu_id] = {items = items, items_by_command = {}}
							target_menu.items[#target_menu.items + 1] = {title = title_part, items = items}
						end

						target_menu = by_id[submenu_id]
					else
						-- If command is already in menu, just append the key to it
						if key ~= '#' and command ~= '' and target_menu.items_by_command[command] then
							local hint = target_menu.items_by_command[command].hint
							local key_human = keybind_to_human(key)
							target_menu.items_by_command[command].hint = hint and hint .. ', ' .. key_human or key_human
						else
							-- Separator
							if title_part:sub(1, 3) == '---' then
								local last_item = target_menu.items[#target_menu.items]
								if last_item then last_item.separator = true end
							elseif command ~= 'ignore' then
								local item = {
									title = title_part,
									hint = not is_dummy and keybind_to_human(key) or nil,
									value = command,
								}
								if command == '' then
									item.selectable = false
									item.muted = true
									item.italic = true
								else
									target_menu.items_by_command[command] = item
								end
								target_menu.items[#target_menu.items + 1] = item
							end
						end
					end
				end
			end
		end

		menu_items = #main_menu.items > 0 and main_menu.items or create_default_menu_items()
		return menu_items
	end
end

-- Adapted from `stats.lua`
function get_keybinds_items()
	local items = {}
	-- uosc and mpv-menu-plugin binds with no keys
	local no_key_menu_binds = itable_filter(
		get_all_user_bindings(),
		function(b) return b.is_menu_item and b.cmd and b.cmd ~= '' and (b.key == '#' or b.key == '_') end
	)
	local binds_dump = itable_join(find_active_keybindings(), no_key_menu_binds)
	local ids = {}

	-- Convert to menu items
	for _, bind in pairs(binds_dump) do
		local id = bind.key .. '<>' .. bind.cmd
		if not ids[id] then
			ids[id] = true
			items[#items + 1] = {title = bind.cmd, hint = keybind_to_human(bind.key) or bind.key, value = bind.cmd}
		end
	end

	-- Sort
	table.sort(items, function(a, b) return a.title < b.title end)

	return #items > 0 and items or {
		{
			title = t('%s are empty', '`input-bindings`'),
			selectable = false,
			align = 'center',
			italic = true,
			muted = true,
		},
	}
end

function open_stream_quality_menu()
	if Menu:is_open('stream-quality') then
		Menu:close()
		return
	end

	local ytdl_format = mp.get_property_native('ytdl-format')
	local items = {}
	---@type Menu
	local menu

	for _, height in ipairs(config.stream_quality_options) do
		local format = 'bestvideo[height<=?' .. height .. ']+bestaudio/best[height<=?' .. height .. ']'
		items[#items + 1] = {title = height .. 'p', value = format, active = format == ytdl_format}
	end

	menu = Menu:open({type = 'stream-quality', title = t('Stream quality'), items = items}, function(event)
		if event.type == 'activate' then
			mp.set_property('ytdl-format', event.value)

			-- Reload the video to apply new format
			-- This is taken from https://github.com/jgreco/mpv-youtube-quality
			-- which is in turn taken from https://github.com/4e6/mpv-reload/
			local duration = mp.get_property_native('duration')
			local time_pos = mp.get_property('time-pos')

			mp.command('playlist-play-index current')

			-- Tries to determine live stream vs. pre-recorded VOD. VOD has non-zero
			-- duration property. When reloading VOD, to keep the current time position
			-- we should provide offset from the start. Stream doesn't have fixed start.
			-- Decent choice would be to reload stream from it's current 'live' position.
			-- That's the reason we don't pass the offset when reloading streams.
			if duration and duration > 0 then
				local function seeker()
					mp.commandv('seek', time_pos, 'absolute')
					mp.unregister_event(seeker)
				end
				mp.register_event('file-loaded', seeker)
			end

			if not event.alt then menu:close() end
		end
	end)
end

function open_open_file_menu()
	if Menu:is_open('open-file') then
		Menu:close()
		return
	end

	---@type Menu | nil
	local menu
	local directory
	local active_file

	if state.path == nil or is_protocol(state.path) then
		directory = options.default_directory
		active_file = nil
	else
		local serialized = serialize_path(state.path)
		if serialized then
			directory = serialized.dirname
			active_file = serialized.path
		end
	end

	if not directory then
		msg.error('Couldn\'t serialize path "' .. state.path .. '".')
		return
	end

	-- Update active file in directory navigation menu
	local function handle_file_loaded()
		if menu and menu:is_alive() then
			menu:activate_one_value(normalize_path(mp.get_property_native('path')))
		end
	end

	menu = open_file_navigation_menu(
		directory,
		function(event)
			if not menu then return end
			local command = has_any_extension(event.value, config.types.playlist) and 'loadlist' or 'loadfile'
			if event.modifiers == 'shift' or event.action == 'add_to_playlist' then
				mp.commandv(command, event.value, 'append')
				local serialized = serialize_path(event.value)
				local filename = serialized and serialized.basename or event.value
				mp.commandv('show-text', t('Added to playlist') .. ': ' .. filename, 3000)
			elseif itable_has({nil, 'ctrl', 'alt', 'alt+ctrl'}, event.modifiers) and itable_has({nil, 'force_open'}, event.action) then
				mp.commandv(command, event.value)
				if not event.alt then menu:close() end
			end
		end,
		{
			type = 'open-file',
			allowed_types = config.types.media,
			active_path = active_file,
			directory_actions = {
				{name = 'add_to_playlist', icon = 'playlist_add', label = t('Add to playlist') .. ' (shift+enter/click)'},
				{name = 'force_open', icon = 'play_circle_outline', label = t('Open in mpv') .. ' (ctrl+enter/click)'},
			},
			file_actions = {
				{name = 'add_to_playlist', icon = 'playlist_add', label = t('Add to playlist') .. ' (shift+enter/click)'},
			},
			keep_open = true,
			on_close = function() mp.unregister_event(handle_file_loaded) end,
		}
	)
	if menu then mp.register_event('file-loaded', handle_file_loaded) end
end

---@param opts {prop: 'sub'|'audio'|'video'; title: string; loaded_message: string; allowed_types: string[]}
function create_track_loader_menu_opener(opts)
	local menu_type = 'load-' .. opts.prop
	return function()
		if Menu:is_open(menu_type) then
			Menu:close()
			return
		end

		---@type Menu
		local menu
		local path = state.path
		if path then
			if is_protocol(path) then
				path = false
			else
				local serialized_path = serialize_path(path)
				path = serialized_path ~= nil and serialized_path.dirname or false
			end
		end
		if not path then
			path = options.default_directory
		end

		local function handle_activate(event)
			load_track(opts.prop, event.value)
			local serialized = serialize_path(event.value)
			local filename = serialized and serialized.basename or event.value
			mp.commandv('show-text', opts.loaded_message .. ': ' .. filename, 3000)
			if not event.alt then menu:close() end
		end

		menu = open_file_navigation_menu(path, handle_activate, {
			type = menu_type, title = opts.title, allowed_types = opts.allowed_types,
		})
	end
end

function open_subtitle_downloader()
	local menu_type = 'download-subtitles'
	---@type Menu
	local menu

	if Menu:is_open(menu_type) then
		Menu:close()
		return
	end

	local search_suggestion, destination_directory = '', nil

	if state.path then
		if is_protocol(state.path) then
			local title = mp.get_property_native('title')
			if title and not is_protocol(title) then search_suggestion = title end
		else
			local serialized_path = serialize_path(state.path)
			if serialized_path then
				search_suggestion = serialized_path.filename
				destination_directory = serialized_path.dirname
			end
		end
	end

	local force_destination = options.subtitles_directory:sub(1, 1) == '!'
	if force_destination or not destination_directory then
		local subtitles_directory = options.subtitles_directory:sub(force_destination and 2 or 1)
		destination_directory = mp.command_native({'expand-path', subtitles_directory})
	end

	local handle_download, handle_search
	local url = 'https://api.opensubtitles.com/api/v1'

	-- Checks if there an error, or data is invalid. If true, reports the error,
	-- updates menu to inform about it, and returns true.
	---@param error string|nil
	---@param data any
	---@param check_is_valid? fun(data: any):boolean
	---@return boolean abort Whether the further response handling should be aborted.
	local function should_abort(error, data, check_is_valid)
		if error or not data or (not check_is_valid or not check_is_valid(data)) then
			menu:update_items({
				{
					title = t('Something went wrong.'),
					align = 'center',
					muted = true,
					italic = true,
					selectable = false,
				},
				{
					title = t('See console for details.'),
					align = 'center',
					muted = true,
					italic = true,
					selectable = false,
				},
			})
			msg.error(error or ('Invalid response: ' .. (utils.format_json(data) or tostring(data))))
			return true
		end
		return false
	end

	---@param data {kind: 'file', id: number}|{kind: 'page', query: string, page: number}
	handle_download = function(data)
		if data.kind == 'page' then
			handle_search(data.query, data.page)
			return
		end

		menu = Menu:open({
			type = menu_type .. '-result',
			search_style = 'disabled',
			items = {{icon = 'spinner', align = 'center', selectable = false, muted = true}},
		}, function(event)
			if event.type == 'key' and event.key == 'enter' then
				menu:close()
			end
		end)

		local download_url = url .. '/download'

		local headers = {
			['Accept'] =  'application/json',
 			['Api-Key'] = config.open_subtitles_api_key,
			['Content-Type'] = 'application/json',
			['User-Agent'] = config.open_subtitles_agent,

 		}

		local body = {
			file_id = data.id
		}

		http_request_async('POST', download_url, headers, body, function(error, data)
			if not menu:is_alive() then return end
			if data and data.link then
				local file_path = utils.join_path(destination_directory, data.file_name)
				local arg = {
					'curl',
					'-sL',
					'--user-agent', config.open_subtitles_agent,
					'-o', file_path,
					data.link
				}

				mp.command_native({
					name = 'subprocess',
					capture_stdout = true,
					capture_stderr = true,
					playback_only = false,
					args = arg
				})
			end

			local function check_is_valid(data)
				local path = data and utils.join_path(destination_directory, data.file_name) or nil
				local meta = path and utils.file_info(path) or nil
				return meta and meta.is_file
			end
			if should_abort(error, data, check_is_valid) then return end

			load_track('sub', utils.join_path(destination_directory, data.file_name))

			menu:update_items({
				{
					title = t('Subtitles loaded & enabled'),
					bold = true,
					icon = 'check',
					selectable = false,
				},
				{
					title = t('Remaining downloads today: %s', data.remaining),
					italic = true,
					muted = true,
					icon = 'file_download',
					selectable = false,
				},
				{
					title = t('Resets in: %s', data.reset_time),
					italic = true,
					muted = true,
					icon = 'schedule',
					selectable = false,
				},
			})
		end)
	end

	---@param query string
	---@param page number|nil
	handle_search = function(query, page)
		if not menu:is_alive() then return end
		page = math.max(1, type(page) == 'number' and round(page) or 1)

		menu:update_items({{icon = 'spinner', align = 'center', selectable = false, muted = true}})

		local languages = itable_filter(get_languages(), function(lang) return lang:match('.json$') == nil end)

		local search_url = string.format('%s/subtitles?query=%s&languages=%s&page=%s', url, url_encode(query),
			table.concat(table_keys(create_set(languages)), ','), tostring(page))

		local headers = {
 			['Api-Key'] = config.open_subtitles_api_key,
			['User-Agent'] = config.open_subtitles_agent,
 		}

		http_request_async('GET', search_url, headers, nil, function(error, data)
			if not menu:is_alive() then return end

			local function check_is_valid(data)
				return data and type(data.data) == 'table' and data.page and data.total_pages
			end
			if should_abort(error, data, check_is_valid) then return end

			local subs = itable_filter(data.data, function(sub)
				return sub and sub.attributes and sub.attributes.release and type(sub.attributes.files) == 'table' and
					#sub.attributes.files > 0
			end)
			local items = itable_map(subs, function(sub)
				local hints = {sub.attributes.language}
				if sub.attributes.foreign_parts_only then hints[#hints + 1] = t('foreign parts only') end
				if sub.attributes.hearing_impaired then hints[#hints + 1] = t('hearing impaired') end
				local url = sub.attributes.url
				return {
					title = sub.attributes.release,
					hint = table.concat(hints, ', '),
					value = {kind = 'file', id = sub.attributes.files[1].file_id, url = url},
					keep_open = true,
					actions = url and
						{{name = 'open_in_browser', icon = 'open_in_new', label = t('Open in browser') .. ' (shift)'}},
				}
			end)

			if #items == 0 then
				items = {
					{title = t('no results'), align = 'center', muted = true, italic = true, selectable = false},
				}
			end

			if data.page > 1 then
				items[#items + 1] = {
					title = t('Previous page'),
					align = 'center',
					bold = true,
					italic = true,
					icon = 'navigate_before',
					keep_open = true,
					value = {kind = 'page', query = query, page = data.page - 1},
				}
			end

			if data.page < data.total_pages then
				items[#items + 1] = {
					title = t('Next page'),
					align = 'center',
					bold = true,
					italic = true,
					icon = 'navigate_next',
					keep_open = true,
					value = {kind = 'page', query = query, page = data.page + 1},
				}
			end

			menu:update_items(items)
		end)
	end

	local initial_items = {
		{title = t('%s to search', 'enter'), align = 'center', muted = true, italic = true, selectable = false},
	}

	menu = Menu:open(
		{
			type = menu_type,
			title = t('enter query'),
			items = initial_items,
			search_style = 'palette',
			on_search = 'callback',
			search_debounce = 'submit',
			search_suggestion = search_suggestion,
			search_submit = search_suggestion and #search_suggestion > 0,
		},
		function(event)
			if event.type == 'activate' then
				if event.action == 'open_in_browser' or event.modifiers == 'shift' then
					local command = ({
						windows = 'explorer',
						linux = 'xdg-open',
						darwin = 'open',
					})[state.platform]
					local url = event.value.url
					mp.command_native_async({
						name = 'subprocess',
						capture_stderr = true,
						capture_stdout = true,
						playback_only = false,
						args = {command, url},
					}, function(success, result, error)
						if not success then
							local err_str = utils.to_string(error or result.stderr)
							msg.error('Error trying to open url "' .. url .. '" in browser: ' .. err_str)
						end
					end)
				elseif not event.action then
					handle_download(event.value)
				end
			elseif event.type == 'search' then
				handle_search(event.query)
			end
		end
	)
end
