#!/usr/bin/python3

from PyQt6.QtCore import pyqtSignal
from PyQt6.QtGui import QDropEvent, QIcon
from PyQt6.QtWidgets import QTreeWidget, QAbstractItemView
from .track import TrackItem


class PlaylistView(QTreeWidget):
    itemDropped = pyqtSignal(QTreeWidget, list)

    def __init__(self, playlist, parent=None):
        super().__init__(parent)

        self.playlist = playlist
        self.app = playlist.app

        playlist.view = self

        self.setDragDropMode(QAbstractItemView.DragDropMode.InternalMove)
        self.setSelectionMode(QAbstractItemView.SelectionMode.ExtendedSelection)

        self.setColumnCount(4)

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

        headers = [
            "",
            "#",
            "Title",
            "Artist",
            "Album",
            "# Custom Sorting"
        ]

        self.setHeaderLabels(headers)

        self.load_tracks()

        self.itemActivated.connect(self.on_track_activation)

    def update_track_numbers(self):
        pass

    def dropEvent(self, event: QDropEvent):
        items = self.selectedItems()  # dragged items are always selected items

        self.itemDropped.emit(self, items)

        super().dropEvent(event)

        event.accept()

    def load_tracks(self):
        for track in self.playlist.tracks:
            track_item = TrackItem(track, self)

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

    def on_track_change(self, previous_track, track):
        # unmark the previous track and mark the current track as playing
        if previous_track:
            previous_track.item.setIcon(0, QIcon(None))

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