import os
from threading import Timer
import remi.gui as gui
from remi import App
from argparse import Namespace
from .utils import call_as_thread, seconds_to_timestamp
from . import api
from .constants import colors, icons

#globals:
WIDTH_L = 400
WIDTH_R = 512
WIDTH = WIDTH_L  + 40 + WIDTH_R

class RemiApp(App):
	def __init__(self, *args):
		res_path = os.path.join(os.path.dirname(__file__), 'res')
		self.old_playlist = None
		super(RemiApp, self).__init__(*args, static_file_path=res_path)

	def make_gui_elements(self): # content and behaviour
		#logo:
		self.logo_image = gui.Image('/res/logo.png')
		self.logo_image.attributes["onclick"] = "document.location='https://www.youtube.com/watch?v=t-fcrn1Edik'"

		#playback controls
		self.playback = Namespace()

		self.playback.playing = gui.Label("Now playing: None")# (TODO): update this

		self.playback.party = gui.Button(icons.PARTY)
		self.playback.party.attributes["onclick"] = "document.body.classList.toggle('dancing');"
		self.playback.party.attributes["title"] = "ENABLE PARTY MODE" # hover text
		self.playback.previous = gui.Button(icons.PREV)
		self.playback.previous.set_on_click_listener(self.playback_previous)
		self.playback.play = gui.Button(icons.PLAY)
		self.playback.play.set_on_click_listener(self.playback_play)
		self.playback.next = gui.Button(icons.NEXT)
		self.playback.next.set_on_click_listener(self.playback_next)

		self.playback.volume_label = gui.Label("Volume:")
		self.playback.volume_slider = gui.Slider(100, 0, 100, 1)
		self.playback.volume_slider.set_oninput_listener(self.change_volume)

		self.playback.seek_slider = gui.Slider(0, 0, 100, 1)
		self.playback.seek_slider.set_oninput_listener(self.change_seek)

		self.playback.timestamp = gui.Label("--:-- - --:--")

		#playlist
		self.playlist = Namespace()

		self.playlist.table = gui.Table()
		self.playlist.table.append_from_list([['#', 'Name', "length", "", "", "", ""]], fill_title=True)

		self.playlist.looping = gui.CheckBoxLabel("<i><small>loop playlist</small></i>")
		self.playlist.looping.set_on_click_listener(self.on_playlist_set_looping)

		self.playlist.shuffle = gui.Button("SHUFFLE")
		self.playlist.shuffle.set_on_click_listener(self.on_playlist_clear_shuffle)

		self.playlist.clear = gui.Button("CLEAR")
		self.playlist.clear.set_on_click_listener(self.on_playlist_clear_click)

		#input
		self.input = Namespace()
		self.input.add_song = gui.Label("Add song:")
		self.input.field = gui.TextInput(single_line=True)
		self.input.field.set_on_enter_listener(self.input_submit)
		self.input.submit = gui.Button("Submit!")
		self.input.submit.set_on_click_listener(self.input_submit)

	def make_gui_container(self):#placement and styling
		# Logo image:
		self.logo_image.style["width"] = "100%"
		for i in (self.playback.previous, self.playback.play, self.playback.next, self.playback.party):
			i.style["margin"] = "3px"
			i.style["width"]  = "2.8em"

		# Playback:
		self.playback.party.style["background"] \
			= f"linear-gradient(40deg,{colors.PINK},{colors.TEAL})"

		self.playback.play.style["background"] \
			= f"linear-gradient(40deg,{colors.BLUE},{colors.PURPLE})"


		self.playback.volume_label.style["font-size"] = "0.8em"

		self.playback.volume_slider.style["width"] = "150px"
		self.playback.volume_slider.style["margin-left"] = "20px"
		self.playback.volume_slider.style["margin-bottom"] = "13px"

		self.playback.seek_slider.set_size("90%", "20px")
		self.playback.seek_slider.style["margin"] = "10px"

		# Playlist:
		self.playlist.table.style["width"] = "100%"
		self.playlist.table.style["margin"] = "10px"
		title_row = self.playlist.table.get_child("title")
		title_row.get_child(title_row._render_children_list[1]) \
			.style["width"] = "100%"

		self.playlist.clear.style["background"] \
			= f"linear-gradient(40deg,{colors.RED},{colors.ORANGE})"
		self.playlist.shuffle.style["background"] \
			= f"linear-gradient(40deg,{colors.TEAL},{colors.GREEN})"

		for i in (self.playlist.shuffle, self.playlist.clear):
			i.style["height"] = "1.8em"
			i.style["font-size"] = "0.8em"
			i.style["margin-left"] = "0.25em"
			i.style["margin-right"] = "0.25em"

		# Input field:
		self.input.field.style["height"] = "20px"
		self.input.field.style["margin"] = "5px"
		self.input.field.style["border"] = "1px solid %s" % colors.BLUE
		self.input.field.style["box-shadow"] = "0px 0px 5px 0px %s" % colors.BLUE_SHADOW
		self.input.field.style["align-self"] = "flex-start"

		self.input.submit.style["margin"] = "0px 5px"
		self.input.submit.style["padding"] = "0px 10px"

		# Containers:
		root_container = gui.HBox()
		root_container.style.update({"margin-left": "auto", "margin-right":"auto"})
		root_container.style["margin-left"] = "auto"
		root_container.style["margin-right"] = "auto"
		root_container.style["max-width"] = f"{WIDTH}px"
		root_container.style["flex-wrap"] = "wrap"

		# LEFT SIDE
		left_container = gui.VBox(width=WIDTH_L)
		left_container.style["margin-top"] = "0.8em"
		left_container.style["align-self"] = "flex-start"
		root_container.append(left_container)

		left_container.append(self.logo_image)

		left_container.append(self.playback.playing)

		playback_container = gui.HBox()
		playback_container.append(self.playback.party)
		playback_container.append(self.playback.previous)
		playback_container.append(self.playback.play)
		playback_container.append(self.playback.next)

		volume_container = gui.VBox()
		volume_container.append(self.playback.volume_label)
		volume_container.append(self.playback.volume_slider)
		playback_container.append(volume_container)

		left_container.append(playback_container)

		left_container.append(self.playback.seek_slider)
		left_container.append(self.playback.timestamp)

		# RIGHT SIDE
		right_container = gui.VBox(width=WIDTH_R)
		right_container.style["margin-top"] = "0.8em"
		right_container.style["align-self"] = "flex-start"
		root_container.append(right_container)

		self.input.add_song.style["line-height"] = "1em"
		right_container.append(self.input.add_song)

		input_container = gui.HBox(width="100%")
		input_container.style["margin"] = "0px"
		input_container.append(self.input.field)
		input_container.append(self.input.submit)
		right_container.append(input_container)

		right_container.append(self.playlist.table)

		playlist_controls = gui.HBox()
		playlist_controls.style["width"] = "100%"
		playlist_controls.style["justify-content"] = "space-between"
		playlist_controls.style["margin-right"] = "0.25em"
		playlist_controls.style["margin-bottom"] = "0.8em"

		playlist_controls.append(self.playlist.looping)

		playlist_button_container = gui.HBox()
		playlist_button_container.append(self.playlist.shuffle)
		playlist_button_container.append(self.playlist.clear)
		playlist_controls.append(playlist_button_container)

		right_container.append(playlist_controls)

		return root_container

	def main(self):
		self.make_gui_elements()
		container = self.make_gui_container()
		self.mainLoop()
		return container
	def mainLoop(self):
		self.playback_update()
		self.volume_update()
		self.playlist_update()

		Timer(1, self.mainLoop).start()

	# events:
	@call_as_thread
	def playback_previous(self, widget):
		api.playlist_previous()

	@call_as_thread
	def playback_play(self, widget):# toggle playblack
		if api.is_playing():
			api.set_playing(False)
			self.set_playing(False)
		else:
			api.set_playing(True)
			self.set_playing(True)

	@call_as_thread
	def playback_next(self, widget):
		api.playlist_next()

	@call_as_thread
	def input_submit(self, widget, value=None):
		if value is None:
			value = self.input.field.get_text()
		self.input.field.set_text("")

		self.input.field.set_enabled(False)
		self.input.submit.set_enabled(False)
		try:
			#data = get_youtube_metadata(value)
			data = None
		finally:
			self.input.field.set_enabled(True)
			self.input.submit.set_enabled(True)

		api.load_path(value, data)

	@call_as_thread
	def change_seek(self, widget, value):
		api.seek_percent(value)

	@call_as_thread
	def change_volume(self, widget, value):
		api.set_volume(value)

	@call_as_thread
	def on_table_row_click(self, row_widget, playlist_item):
		print("row", playlist_item)

	@call_as_thread
	def on_table_item_move_click(self, row_widget, playlist_item, down = True):
		index = playlist_item["index"]
		dest = index + 2 if down else index-1
		api.playlist_move(index, dest)

	@call_as_thread
	def on_table_item_remove_click(self, row_widget, playlist_item):
		api.playlist_remove(playlist_item["index"])

	@call_as_thread
	def on_table_item_play_item(self, row_widget, playlist_item):
		api.playlist_goto(playlist_item["index"])
		api.set_playing(True)
		self.set_playing(True)

	@call_as_thread
	def on_playlist_set_looping(self, row_widget):
		toggled = not row_widget.get_value()
		api.playlist_set_looping(toggled)
		row_widget.set_value(toggled)

	@call_as_thread
	def on_playlist_clear_shuffle(self, row_widget):
		api.playlist_shuffle()

	@call_as_thread
	def on_playlist_clear_click(self, row_widget):
		api.playlist_clear()

	# gui updaters:

	@call_as_thread
	def playback_update(self):
		is_playing = api.is_playing()
		self.set_playing(is_playing)

		self.playlist.looping.set_value(api.get_playlist_looping())

		if is_playing: # update seekbar and timestamp
			try:
				playback_pos = api.get_playback_pos()
			except api.APIError:
				playback_pos = None

			if playback_pos and isinstance(playback_pos, dict) and playback_pos["current"] and playback_pos["total"]:
				slider_pos = playback_pos["current"] / playback_pos["total"] * 100
				current = seconds_to_timestamp(playback_pos["current"])
				total = seconds_to_timestamp(playback_pos["total"])

				if self.playback.seek_slider.get_value() != slider_pos:
					self.playback.seek_slider.set_value(slider_pos)

				self.playback.timestamp.set_text(f"{current} - {total}")
			else:
				self.playback.timestamp.set_text("--:-- - --:--")

	@call_as_thread
	def volume_update(self):
		volume = api.get_volume()
		if volume > 100:
			volume = 100

		if self.playback.volume_slider.get_value() != volume:
			self.playback.volume_slider.set_value(volume)

	@call_as_thread
	def playlist_update(self):
		playlist = api.get_playlist() # json structure
		N = len(playlist)

		start_ellipsis = False
		end_ellipsis   = False
		if N > 100:
			current, *_ = *(i for i, playlist_item in enumerate(playlist) if playlist_item.get("current", False)), None
			if current is not None:
				playlist = playlist[max(0, current - 50) : max(current+50, 100)]
				start_ellipsis = current - 50 > 0
				end_ellipsis   = max(current+50, 100) < N


		# update playlist table content:
		table = []
		for playlist_item in playlist:
			name = playlist_item["filename"]
			length = None

			if "data" in playlist_item:
				name = playlist_item["data"].get("title", name)
				length = playlist_item["data"].get("duration", length)

			table.append([
				playlist_item["index"],
				name,
				seconds_to_timestamp(length) if length else "--:--",
				icons.GOTO,
				icons.UP,
				icons.DOWN,
				icons.TRASH,
			])

		if start_ellipsis:
			table.insert(0, ["", f"...{current - 50} more ...", "", "", "", "", ""])
		if end_ellipsis:
			table.append(["", f"...{N - current - 50} more ...", "", "", "", "", ""])

		this_playlist = list(zip(table, [i.get("current", False) for i in playlist])) # ew, but it works...
		if this_playlist == self.old_playlist: return
		self.old_playlist = this_playlist

		self.playlist.table.empty(keep_title=True)
		self.playlist.table.append_from_list(table)

		# styling the new table:
		# for each row element:
		for row_key, playlist_item in zip(self.playlist.table._render_children_list[1:][1 if start_ellipsis else 0 : -1 if end_ellipsis else None], playlist):
			row_widget = self.playlist.table.get_child(row_key)
			row_widget.set_on_click_listener(self.on_table_row_click, playlist_item)

			if playlist_item.get("current", False):
				self.playback.previous.set_enabled(playlist_item.get("index") != 0)
				self.playback.next.set_enabled(playlist_item.get("index") != N-1)
				row_widget.style["background-color"] = colors.LIGHT_BLUE
			else:
				row_widget.style["color"] = colors.GRAY_DARK


			# for each item element in this row:
			for item_index, item_key in enumerate(row_widget._render_children_list):
				item_widget = row_widget.get_child(item_key)

				if item_index == 1 and "failed" in playlist_item.get("data", {}):
					item_widget.style["width"] = "1.1em"
					item_widget.style["color"] = colors.RED

				if item_index >= 3:
					item_widget.style["width"] = "1.1em"

				if item_index == 3: # seek here
					item_widget.style["color"] = colors.GREEN#colors.RED if playlist_item.get("current", False) else
					item_widget.set_on_click_listener(self.on_table_item_play_item, playlist_item)
					item_widget.attributes["title"] = "Play this item"

				if item_index == 4: # move up
					item_widget.set_on_click_listener(self.on_table_item_move_click, playlist_item, False)
					if playlist_item["index"] == 0:
						item_widget.style["color"] = colors.GRAY_LIGHT
					else:
						item_widget.style["color"] = colors.TEAL
					item_widget.attributes["title"] = "Move this item up the playlist"
				if item_index == 5: # move down
					item_widget.set_on_click_listener(self.on_table_item_move_click, playlist_item, True)
					if playlist_item["index"] == N-1:
						item_widget.style["color"] = colors.GRAY_LIGHT
					else:
						item_widget.style["color"] = colors.TEAL
					item_widget.attributes["title"] = "Move this item down the playlist"

				if item_index == 6: # remove from playlist
					item_widget.style["color"] = colors.RED
					item_widget.set_on_click_listener(self.on_table_item_remove_click, playlist_item)
					item_widget.attributes["title"] = "Remove this item from the playlist"

				#print(index, key, item_widget)


	def set_playing(self, is_playing:bool): # Only updates GUI elements!
		self.playback.play.set_text(icons.PAUSE if is_playing else icons.PLAY)
		self.playback.seek_slider.set_enabled(is_playing)