#!/usr/bin/python3

from PyQt6.QtCore import Qt
from PyQt6.QtGui import QIcon
from PyQt6.QtWidgets import QTabWidget, QTreeWidgetItem, QAbstractItemView
from ..player.playlist import Playlist
from ..ui.library_dock import LibraryDock
from ..ui.playlist import PlaylistView


class Library:
    """
    Class that manages and syncs the library and library gui dock widgets.
    """

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

        self.main_library_dock = LibraryDock()
        self.library_docks = [self.main_library_dock]

        self.temporary_playlist = Playlist(self.app, "Temporary Playlist")
        self.playlists = [self.temporary_playlist]

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

    def create_playlist_views(self):
        for library_dock in self.library_docks:
            playlist_tabs: QTabWidget = library_dock.library.playlist_tabs

            playlist_tabs.playlists = {}

            for playlist in self.playlists:
                playlist_view = self.create_playlist_view(playlist)
                playlist_tabs.playlists[playlist.title] = playlist_view
                playlist_tabs.addTab(playlist_view, playlist.title)
                playlist_view.itemActivated.connect(self.on_track_activation)

    def create_playlist_view(self, playlist: Playlist):
        view = PlaylistView()
        view.setDragDropMode(QAbstractItemView.DragDropMode.InternalMove)

        num_tracks = len(playlist.tracks)

        i = 0

        while i < num_tracks:
            track = playlist.tracks[i]

            track_item = QTreeWidgetItem(view)

            track_item.setFlags(
                Qt.ItemFlag.ItemIsEnabled |
                Qt.ItemFlag.ItemIsSelectable # |
                # Qt.ItemFlag.ItemIsDragEnabled
            )

            track_item.track = track
            track_item.setText(2, track.tags.title)
            track_item.setText(3, track.tags.artist)
            track_item.setText(4, track.tags.album)
            track_item.setText(5, str(i + 1))

            i += 1

        return view

    def on_track_activation(self, item, column):
        index = item.treeWidget().indexOfTopLevelItem(item)
        self.app.player.play_track_in_playlist(index)

    def get_track_tree_item(self, track):
        index = self.app.player.current_playlist.tracks.index(track)
        playlist_view = self.main_library_dock.library.playlist_tabs.playlists[self.app.player.current_playlist.title]
        item = playlist_view.topLevelItem(index)

        return item

    def on_track_change(self, previous_track, track):
        if previous_track:
            item = self.get_track_tree_item(previous_track)
            item.setIcon(0, QIcon(None))

        if track:
            item = self.get_track_tree_item(track)
            item.setIcon(0, self.play_icon)