#!/usr/bin/python3

from PyQt6.QtCore import Qt
from PyQt6.QtGui import QDragEnterEvent, QMouseEvent
from PyQt6.QtWidgets import QTabWidget, QTabBar, QLineEdit


class PlaylistTabs(QTabWidget):
    def __init__(self, library, parent=None):
        self.library = library

        super().__init__(parent)

        self.tab_bar = PlaylistTabBar(self)
        self.setTabBar(self.tab_bar)
        self.setDocumentMode(True)

        self.setMovable(True)
        self.setAcceptDrops(True)

    def addTab(self, widget, label):
        super().addTab(widget, None)

        index = self.tab_bar.count() - 1

        title = TabTitle(label, self.tab_bar, index)

        self.tab_bar.setTabButton(index, QTabBar.ButtonPosition.RightSide, title)


class PlaylistTabBar(QTabBar):
    def __init__(self, parent=None):
        super().__init__(parent)

        self.tab_widget = parent
        self.app = parent.library.app

        self.setAcceptDrops(True)

        self.tabBarClicked.connect(self.on_click)
        self.tabBarDoubleClicked.connect(self.on_doubleclick)

    def dragEnterEvent(self, event: QDragEnterEvent):
        index = self.tabAt(event.position().toPoint())

        self.tab_widget.setCurrentIndex(index)

    def on_click(self, index):
        playlist_view = self.tab_widget.widget(index)
        playlist = playlist_view.playlist

        self.app.gui.clicked_playlist = playlist

    def on_doubleclick(self, index):
        playlist_view = self.tab_widget.widget(index)
        playlist = playlist_view.playlist

        self.app.player.start_playlist(playlist)


class TabTitle(QLineEdit):
    def __init__(self, label, parent, index: int):
        super().__init__(label, parent)

        self.tab_bar: PlaylistTabBar = parent
        self.index = index

        self.setStyleSheet("QLineEdit {background: transparent;}")

        self.setFocusPolicy(Qt.FocusPolicy.NoFocus)

    def mouseDoubleClickEvent(self, event: QMouseEvent):
        self.tab_bar.tabBarDoubleClicked.emit(self.index)

    def mousePressEvent(self, event: QMouseEvent):
        self.tab_bar.tabBarClicked.emit(self.index)
        self.tab_bar.setCurrentIndex(self.index)