#!/usr/bin/python3

import os

import pygame.mixer
import pygame.event
from .track import Track
from .track_progress_timer import TrackProgress


class Player:
    def __init__(self, app):
        self.app = app

        pygame.mixer.init()
        self.mixer = pygame.mixer
        self.music_channel = self.mixer.Channel(0)

        self.track_progress = TrackProgress(self.app)

        self.playing = False
        self.paused = False

        self.current_playlist = []
        self.current_playlist_index = 0

        self.current_track = None

        self.current_sound = None
        self.current_sound_duration = 0

    def load_tracks_from_paths(self, track_paths: list[str]):
        """
        Load tracks from list of paths.
        """

        tracks = []

        for track_path in track_paths:
            if os.path.isfile(track_path):
                tracks.append(Track(track_path, True))

        self.current_playlist = tracks
        self.current_playlist_index = 0

        self.current_track = self.current_playlist[0]

        self.current_sound = self.current_track.sound
        self.current_sound_duration = self.current_track.duration

    def play(self):
        self.music_channel.play(self.current_sound)

        self.playing = True
        self.paused = False

    def track_finished(self):

        # if the last track wasn't the last in the playlist
        if self.current_playlist_index < len(self.current_playlist) - 1:
            self.current_playlist_index += 1

            self.current_track = self.current_playlist[self.current_playlist_index]
            self.current_sound = self.current_track.sound
            self.current_sound_duration = self.current_track.duration

            self.play()
            self.track_progress.start()
            self.app.gui_communication.on_track_start()

        else:
            self.stop()

    def start_playing(self):
        self.current_sound = self.current_track.sound
        self.current_sound_duration = self.current_track.duration

        self.play()
        self.track_progress.start()

    def pause(self):
        self.music_channel.pause()
        self.track_progress.pause()
        self.paused = True

    def unpause(self):
        self.music_channel.unpause()
        self.track_progress.unpause()

        self.playing = True
        self.paused = False

    def next_track(self):
        if self.current_playlist_index < len(self.current_playlist) - 1:  # if the playing track isn't the last
            self.music_channel.stop()
            self.track_progress.stop()
            self.track_finished()

    def previous_track(self):
        if self.current_playlist_index > 0:  # if the current track isn't the first in the playlist
            self.music_channel.stop()

            self.current_playlist_index -= 1
            self.current_track = self.current_playlist[self.current_playlist_index]

            self.track_progress.stop()

            self.current_sound = self.current_track.sound
            self.current_sound_duration = self.current_track.duration

            self.play()
            self.track_progress.start()

            self.app.gui_communication.on_track_start()

    def stop(self):
        self.music_channel.stop()
        self.track_progress.stop()
        self.current_sound_duration = self.current_track.duration

        self.playing = False
        self.paused = False

    def seek(self, position: int):
        self.music_channel.stop()
        self.track_progress.stop()

        (self.current_sound, self.current_sound_duration) = self.current_track.remaining(position)

        self.play()
        self.track_progress.start()