#! /usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Copyright 2018, Nils Hilbricht, Germany ( https://www.hilbricht.net )

This file is part of the Laborejo Software Suite ( https://www.laborejo.org ),
more specifically its template base application.

The Template Base Application 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.

This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
"""
import logging; logging.info("import {}".format(__file__))

#Standard Library Modules
import os.path
#Third Party Modules
from PyQt5 import QtWidgets, QtCore, QtGui
#Template Modules
from template.qtgui.mainwindow import MainWindow as TemplateMainWindow
from template.qtgui.menu import Menu
from template.qtgui.about import About

#Our modules
import engine.api as api
from .songeditor import SongEditor, TrackLabelEditor
from .timeline import Timeline
from .pattern_grid import PatternGrid
from .resources import *

class MainWindow(TemplateMainWindow):

    def __init__(self):
        """The order of calls is very important.
        The split ploint is calling the super.__init. Some functions need to be called before,
        some after.
        For example:

        The about dialog is created in the template main window init. So we need to set additional
        help texts before that init.
        """

        #Inject more help texts in the templates About "Did You Know" field.
        #About.didYouKnow is a class variable.
        #Make the first three words matter!
        #Do not start them all with "You can..." or "...that you can", in response to the Did you know? title.
        #We use injection into the class and not a parameter because this dialog gets shown by creating an object. We can't give the parameters when this is shown via the mainWindow menu.
        About.didYouKnow = [
            QtCore.QCoreApplication.translate("About", "Prefer clone track over adding a new empty track when creating a new pattern for an existing 'real world' instrument."),
            QtCore.QCoreApplication.translate("About", "You can run multiple Patroneo instances in parallel to create complex polyrhythms."),
            QtCore.QCoreApplication.translate("About", "To revert all steps that are longer or shorter than default invert the pattern twice in a row."),
            QtCore.QCoreApplication.translate("About", "Control a synth with MIDI Control Changes (CC) by routing a Patroneo track into a midi plugin that converts notes to CC."),
            ] + About.didYouKnow

        super().__init__()

        #New menu entries and template-menu overrides

        #Playback Controls

        width = 65

        self.ui.playPauseButton.setFixedWidth(width)
        self.ui.playPauseButton.setText("")
        self.ui.playPauseButton.setIcon(QtGui.QIcon(':playpause.png'))
        self.ui.playPauseButton.clicked.connect(api.playPause)
        self.ui.playPauseButton.setToolTip(QtCore.QCoreApplication.translate("PlaybackControls", "[Space] Play / Pause"))
        self.ui.centralwidget.addAction(self.ui.actionPlayPause) #no action without connection to a widget.
        self.ui.actionPlayPause.triggered.connect(self.ui.playPauseButton.click)

        self.ui.loopButton.setFixedWidth(width)
        self.ui.loopButton.setText("")
        self.ui.loopButton.setIcon(QtGui.QIcon(':loop.png'))
        self.ui.loopButton.setToolTip(QtCore.QCoreApplication.translate("PlaybackControls", "[L] Loop current Measure"))
        self.ui.loopButton.clicked.connect(api.toggleLoop)
        self.ui.centralwidget.addAction(self.ui.actionLoop) #no action without connection to a widget.
        self.ui.actionLoop.triggered.connect(self.ui.loopButton.click)

        def callback_loopButtonText(measureNumber):
            if not measureNumber is None:
                nrstr = str(measureNumber+1)
                self.ui.loopButton.setText(nrstr)
            else:
                self.ui.loopButton.setText("")
        api.callbacks.loopChanged.append(callback_loopButtonText)


        self.ui.toStartButton.setFixedWidth(width)
        self.ui.toStartButton.setText("")
        self.ui.toStartButton.setIcon(QtGui.QIcon(':tostart.png'))
        self.ui.toStartButton.setToolTip(QtCore.QCoreApplication.translate("PlaybackControls", "[Backspace] Jump to Start"))
        self.ui.toStartButton.clicked.connect(api.toStart)
        self.ui.centralwidget.addAction(self.ui.actionToStart) #no action without connection to a widget.
        self.ui.actionToStart.triggered.connect(self.ui.toStartButton.click)

        ##Song Editor
        self.ui.songEditorView.parentMainWindow = self
        self.songEditor = SongEditor(parentView=self.ui.songEditorView)
        self.ui.songEditorView.setScene(self.songEditor)

        self.ui.trackEditorView.parentMainWindow = self
        self.trackLabelEditor = TrackLabelEditor(parentView=self.ui.trackEditorView)
        self.ui.trackEditorView.setScene(self.trackLabelEditor)

        self.ui.timelineView.parentMainWindow = self
        self.timeline = Timeline(parentView=self.ui.timelineView)
        self.ui.timelineView.setScene(self.timeline)

        #Sync the vertical trackEditorView scrollbar (which is never shown) with the songEditorView scrollbar.
        self.ui.songEditorView.setVerticalScrollBar(self.ui.trackEditorView.verticalScrollBar()) #this seems backwards, but it is correct :)

        #Sync the horizontal timelineView scrollbar (which is never shown) with the songEditorView scrollbar.
        self.ui.songEditorView.setHorizontalScrollBar(self.ui.timelineView.horizontalScrollBar()) #this seems backwards, but it is correct :)

        ##Pattern Editor
        self.ui.gridView.parentMainWindow = self
        self.patternGrid = PatternGrid(parentView=self.ui.gridView)
        self.ui.gridView.setScene(self.patternGrid)


        #There is always a track. Forcing that to be active is better than having to hide all the pattern widgets, or to disable them.
        self.chooseCurrentTrack(api.session.data.tracks[0].export()) #By Grabthar's hammer, by the suns of Worvan, what a hack!    #TODO: Access to the sessions data structure directly instead of api. Not good. Getter function or api @property is cleaner.



        self.start()  #This shows the GUI, or not, depends on the NSM gui save setting. We need to call that after the menu, otherwise the about dialog will block and then we get new menu entries, which looks strange.

    def addTrack(self):
        """Add a new track and initialize it with some data from the current one"""
        scale = api.session.data.trackById(self.currentTrackId).pattern.scale #TODO: Access to the sessions data structure directly instead of api. Not good. Getter function or api @property is cleaner.
        api.addTrack(scale)