#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#=============================================================================
#  MusE
#  Linux Music Editor
#  $Id:$
#
#  Copyright (C) 2002-2011 by Werner Schweer and others
#
#  This program 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 2
#  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, write to the
#  Free Software Foundation, Inc.,
#  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#=============================================================================

import sys,time
from PyQt5.QtWidgets import QApplication, QWidget, QLineEdit, QPushButton, QGridLayout, QLabel, QComboBox

class ScriptClass(QWidget):
    def __init__(self, parent=None):
        QWidget.__init__(self, parent)

        self.setWindowTitle('Constant length')
        title = QLabel('Make all events of length:')
        self.titleEdit = QComboBox()
        self.titleEdit.addItem('1/1',1)
        self.titleEdit.addItem('1/2',2)
        self.titleEdit.addItem('1/4',4)
        self.titleEdit.addItem('1/8',8)
        self.titleEdit.addItem('1/16',16)
        self.titleEdit.addItem('1/32',32)
        self.titleEdit.addItem('1/64',64)
        self.titleEdit.setCurrentIndex(4)

        button = QPushButton("Execute")
        button.clicked.connect(self.execute)
        grid = QGridLayout()
        grid.setSpacing(3)

        grid.addWidget(title, 1, 0)
        grid.addWidget(self.titleEdit, 1, 1)

        grid.addWidget(button, 2, 1)

        self.setLayout(grid)
        self.resize(200, 100)
        button.setFocus()

    def execute(self):
        testFile = open(sys.argv[1],"r")
        inputEvents = testFile.readlines()
        testFile.close()

        beatDiv = self.titleEdit.itemData(self.titleEdit.currentIndex())
        print ("beatDiv=",beatDiv)
        eventLen=0
        #get beat length to calculate minimum length of event
        for line in inputEvents:
            if line.startswith('BEATLEN'):
              tag,tick = line.split(' ')
              eventLen=int(int(tick)/beatDiv * 4)
              break

        outputEvents=[]
        #loop through events
        for line in inputEvents:
            
            if line.startswith('NOTE'):
              tag,tick,note,length,velocity = line.split(' ')

              length=eventLen
              newLine=tag+" "+tick+" "+note+" "+str(length)+" "+velocity + "\n"
              outputEvents.append(newLine)
                
            else:
              outputEvents.append(line)
            
        testFile = open(sys.argv[1],"w")
        testFile.writelines(outputEvents)
        testFile.close()
        
        quit()



app = QApplication(sys.argv)
qb = ScriptClass()
qb.show()
sys.exit(app.exec_())
