#!/usr/bin/python3

import os
from .track import Track


class Playlist:
    def __init__(self, app, title: str):
        self.app = app
        self.title = title  # playlist title
        self.tracks: list[Track] = []
        self.current_track_index = 0
        self.current_track: Track | None = None

    def load_from_paths(self, paths):
        i = 0

        while i < len(paths):
            path = paths[i]

            if os.path.isfile(path):
                self.tracks.append(Track(self.app, path, cache=i==0))  # first track is cached

            i += 1

        if self.current_track is None:  # set current track to the first track if there is no currently playing track
            self.current_track = self.tracks[0]

    def load_from_m3u(self, path):
        file = open(path, "r")
        m3u = file.read()
        file.close()

        lines = m3u.split("\n")  # m3u entries
        lines = lines[:-1]
        print(lines)

        i = 0

        while i < len(lines):
            line = lines[i]

            if line.startswith("#") or line.startswith("http"):  # filter out comments, extended m3u and urls
                continue

            self.tracks.append(Track(self.app, line, cache=i==0))  # first track is cached

            i += 1

        if self.current_track is None:  # set current track to the first track if there is no currently playing track
            self.current_track = self.tracks[0]

    def load_from_wbz(self, path):
        pass

    def has_tracks(self):
        return len(self.tracks) > 0

    def on_first_track(self):
        return self.current_track_index == 0

    def on_last_track(self):  # if the current track is the last
        return self.current_track_index == len(self.tracks) - 1

    def next_track(self):
        self.current_track_index += 1
        self.current_track = self.tracks[self.current_track_index]

        if not self.current_track.cached:  # make sure the track is cached because else the player can't play it
            self.current_track.cache()
            self.current_track.cached = True

        return self.current_track.sound, self.current_track.duration

    def previous_track(self):
        if self.on_first_track():
            return self.current_track, self.current_track.duration

        self.current_track_index -= 1
        self.current_track = self.tracks[self.current_track_index]

        if not self.current_track.cached:  # make sure the track is cached because else the player can't play it
            self.current_track.cache()
            self.current_track.cached = True

        return self.current_track.sound, self.current_track.duration