#!/usr/bin/python3

from PyQt6.QtCore import QTimer
from PyQt6.QtGui import QIcon

PROGRESS_UPDATE_RATE = 60
PROGRESS_UPDATE_INTERVAL = 1000 // PROGRESS_UPDATE_RATE


class TrackControl:
    """
    Handles events for the track_control widget.
    """

    def __init__(self, app):
        self.app = app
        self.track_control = self.app.gui.window.track_control
        self.track_progress_slider = self.track_control.track_progress_slider

        self.play_icon = QIcon.fromTheme(QIcon.ThemeIcon.MediaPlaybackStart)
        self.pause_icon = QIcon.fromTheme(QIcon.ThemeIcon.MediaPlaybackPause)

        self.progress_update_timer = QTimer()
        self.progress_update_timer.timeout.connect(self.update_progress)
        self.progress_update_timer.start(PROGRESS_UPDATE_INTERVAL)

        self.connect()

        self.on_track_change(None, None)

    def connect(self):
        self.track_control.previous_button.triggered.connect(self.previous_track)
        self.track_control.toggle_play_button.triggered.connect(self.toggle_playing)
        self.track_control.stop_button.triggered.connect(self.stop)
        self.track_control.next_button.triggered.connect(self.next_track)

        self.track_control.track_progress_slider.sliderReleased.connect(self.on_slider_release)

    def previous_track(self):
        if self.app.player.current_playlist.has_tracks():
            self.app.player.previous_track()

    def stop(self):
        if self.app.player.current_playlist.has_tracks():
            self.app.player.stop()

    def next_track(self):
        if self.app.player.current_playlist.has_tracks():
            self.app.player.next_track()

    def on_slider_release(self):
        if self.app.player.current_playlist.has_tracks():
            self.app.player.seek(self.track_control.track_progress_slider.value())

    def on_track_change(self, previous_track, track):
        if self.app.player.playing:
            duration = 0

            if track:
                duration = track.duration

            self.track_control.track_progress_slider.setRange(
                0,
                duration
            )

            self.track_control.track_length_indicator.setText(self.app.utils.format_time(duration))

            self.update_progress()

    def update_progress(self):
        if not self.track_progress_slider.dragged:
            if self.app.player.playing:
                remaining = self.app.player.track_progress.timer.remainingTime()

                if remaining == -1:
                    remaining = self.app.player.track_progress.remaining_time

                track_duration = self.app.player.current_playlist.current_track.duration

                progress = track_duration - remaining

                self.track_control.progress_indicator.setText(self.app.utils.format_time(progress))

                self.track_control.track_progress_slider.setValue(progress)

            else:
                self.track_control.progress_indicator.setText(self.app.utils.format_time(0))

                self.track_control.track_progress_slider.setValue(0)

    def toggle_playing(self):
        if self.app.player.playing and self.app.player.paused:  # paused
            self.app.player.unpause()

        elif self.app.player.playing:  # playing
            self.app.player.pause()

        elif self.app.player.current_playlist.has_tracks():  # stopped but tracks in the current playlist
            self.app.player.start_playing()

    def on_playstate_update(self):
        if self.app.player.playing:
            if self.app.player.paused:
                self.track_control.toggle_play_button.setIcon(self.play_icon)

            else:
                self.track_control.toggle_play_button.setIcon(self.pause_icon)

        else:
            self.track_control.toggle_play_button.setIcon(self.play_icon)