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#
#    Copyright (C) 2008 jerous <jerous@gmail.com>
#    Copyright (C) 2009 Anton Khirnov <wyskas@gmail.com>
#
#    Nephilim is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    Nephilim is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with Nephilim.  If not, see <http://www.gnu.org/licenses/>.
#

from PyQt5 import QtGui, QtWidgets, QtCore
from PyQt5.QtCore import pyqtSlot as Slot
import logging

from .common import APPNAME, sec2min, appIcon
from . import icons
from . import data

class MainWindow(QtWidgets.QMainWindow):
    """
    Application's main window class.
    """
    mpclient = None
    settings = None
    " menus"
    mConnect    = None
    mDisconnect = None
    __layout_menu     = None

    # Statusbar objects
    __statuslabel = None
    __time_slider = None
    __time_label  = None

    __docks = []

    def __init__(self, mpclient):
        QtWidgets.QMainWindow.__init__(self)

        self.settings = QtCore.QSettings()
        self.mpclient = mpclient


        # statusbar
        self.statusBar()
        self.__statuslabel = QtWidgets.QLabel()
        self.__time_slider = QtWidgets.QSlider(QtCore.Qt.Horizontal, self)
        self.__time_slider.setMaximumWidth(self.width()/4)
        self.__time_slider.sliderReleased.connect( self.__on___time_slider_change)
        self.__time_label = TimeLabel(self, mpclient)
        self.mpclient.time_changed.connect(self.__on_time_change)

        self.statusBar().addWidget(self.__statuslabel)
        self.statusBar().addPermanentWidget(self.__time_label)
        self.statusBar().addPermanentWidget(self.__time_slider)

        mBar = QtWidgets.QMenuBar() # create a menubar
        # Server menu
        m = mBar.addMenu('&Server')
        # connect
        self.mConnect=m.addAction('&Connect.', QtWidgets.QApplication.instance().show_connect_win)
        self.mConnect.setIcon(QtGui.QIcon(appIcon))
        # disconnect
        self.mDisconnect=m.addAction('&Disconnect', self.mpclient.disconnect_mpd)
        self.mDisconnect.setIcon(QtGui.QIcon(':icons/disconnect.png'))
        # separator
        m.addSeparator()
        # update/rescan
        m.addAction('&Update', self.mpclient.update_database)
        m.addAction('&Rescan', self.mpclient.rescan_database)
        m.addSeparator()
        # quit
        m.addAction("&Quit", QtWidgets.QApplication.instance().quit).setIcon(QtGui.QIcon(':icons/gtk-quit.svg'))

        # menu options
        m=mBar.addMenu("Options")
        # settings
        m.addAction("Settings", QtWidgets.QApplication.instance().show_settings_win).setIcon(QtGui.QIcon(':icons/gtk-preferences.svg'))

        # menu layout
        self.__layout_menu=mBar.addMenu("Layout")

        # create a toolbar for the main menu
        menu_toolbar = QtWidgets.QToolBar('Main menu', self)
        menu_toolbar.addWidget(mBar)
        self.addToolBar(QtCore.Qt.TopToolBarArea, menu_toolbar)

        self.__update_layout_menu()
        self.setDockOptions(self.AllowNestedDocks | self .AllowTabbedDocks | self.VerticalTabs)
        self.setDockNestingEnabled(True)
        self.restoreGeometry(self.settings.value('geometry', QtCore.QByteArray()))

        " add event handlers"
        self.mpclient.connect_changed.connect(self.__on_connect_changed)
        self.mpclient.song_changed.connect(self.__on_song_change)
        self.mpclient.state_changed.connect(self.__update_state_messages)

        self.__update_state_messages()
        self.show()

    def on_quit(self):
        self.settings.setValue('geometry', self.saveGeometry())

    def __update_layout_menu(self):
        self.__layout_menu.clear()
        self.__layout_menu.addAction('Save layout', self.save_layout)
        self.__layout_menu.addAction('Restore layout', self.restore_layout)
        self.__layout_menu.addSeparator()
        # create checkable menu
        a = QtWidgets.QAction('Show titlebars', self)
        a.setCheckable(True)
        a.setChecked(int(self.settings.value('show_titlebars', 1)))
        self.__toggle_titlebars(a.isChecked())
        a.toggled.connect(self.__toggle_titlebars)
        self.__layout_menu.addAction(a)
        self.__layout_menu.addSeparator()

        m = self.createPopupMenu()
        if m:
           for action in m.actions():
            self.__layout_menu.addAction(action)

    def __toggle_titlebars(self, val):
        if val:
            self.settings.setValue('show_titlebars', 1)
        else:
            self.settings.setValue('show_titlebars', 0)
        for dock in self.__docks:
            if val:
                dock.setTitleBarWidget(None)
            else:
                dock.setTitleBarWidget(QtWidgets.QWidget())
    def add_dock(self, dock):
        if dock:
            self.__docks.append(dock)
            self.addDockWidget(QtCore.Qt.TopDockWidgetArea, dock)
            self.__update_layout_menu()
    def remove_dock(self, dock):
        if dock:
            self.removeDockWidget(dock)
            if dock in self.__docks:
                self.__docks.remove(dock)
            self.__update_layout_menu()

    def save_layout(self):
        self.settings.setValue('layout', self.saveState())
    def restore_layout(self):
        layout = self.settings.value('layout')
        if not layout:
            l_file = QtCore.QFile(':default_layout')
            l_file.open(QtCore.QIODevice.ReadOnly)
            layout = l_file.readAll()
        self.restoreState(layout)


    def __on_connect_changed(self, val):
        if val:
            self.mDisconnect.setEnabled(True)
            self.mConnect.setEnabled(False)
        else:
            self.mDisconnect.setEnabled(False)
            self.mConnect.setEnabled(True)

    def __update_state_messages(self):
        """Update window title and statusbar"""
        song = self.mpclient.cur_song
        state = self.mpclient.status['state']
        state = 'playing' if state == 'play' else 'paused' if state == 'pause' else 'stopped'
        if song:
            self.setWindowTitle('%s by %s - %s [%s]'%(song['?title'], song['?artist'], APPNAME, state))
            self.__statuslabel.setText('%s by %s on %s [%s]'%(song['?title'], song['?artist'],song['?album'], state))
        else:
            self.setWindowTitle(APPNAME)
            self.__statuslabel.setText('')

    def __on___time_slider_change(self):
        self.mpclient.seek(self.__time_slider.value())

    def __on_song_change(self):
        status = self.mpclient.status
        self.__time_slider.setMaximum(status['time'][1])
        self.__time_slider.setEnabled(True)
        self.__update_state_messages()

    def __on_time_change(self, new_time):
        if not self.__time_slider.isSliderDown():
            self.__time_slider.setValue(new_time)

class TimeLabel(QtWidgets.QLabel):

    _mpclient = None

    def __init__(self, parent, mpclient):
        QtWidgets.QLabel.__init__(self, parent)

        self._mpclient = mpclient

        self._mpclient.time_changed.connect(self._update_text)
        self._update_text(self._mpclient.status['time'][0])

    @Slot(int)
    def _update_text(self, time):
        self.setText('%s/%s'%(sec2min(time), sec2min(self._mpclient.status['time'][1])))