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 /* GCompris - play_rhythm.js
  *
  * SPDX-FileCopyrightText: 2018 Aman Kumar Gupta <gupta2140@gmail.com>
  *
  * Authors:
  *   Beth Hadley <bethmhadley@gmail.com> (GTK+ version)
  *   Aman Kumar Gupta <gupta2140@gmail.com> (Qt Quick port)
  *
  *   SPDX-License-Identifier: GPL-3.0-or-later
  */
 .pragma library
 .import QtQuick 2.12 as Quick
 .import "qrc:/gcompris/src/core/core.js" as Core
 
 var numberOfLevel
 var currentNote = 0
 var items
 var levels
 var isIntroductoryAudioPlaying = false
 
 function start(items_) {
     items = items_
     levels = items.parser.parseFromUrl("qrc:/gcompris/src/activities/play_rhythm/resource/dataset.json").levels
     numberOfLevel = levels.length
     items.currentLevel = Core.getInitialLevel(numberOfLevel)
     items.introductoryAudioTimer.start()
     initLevel()
 }
 
 function stop() {
     items.introductoryAudioTimer.stop()
     items.metronomeOscillation.stop()
     items.multipleStaff.stopAudios()
     items.score.stopWinAnimation()
 }
 
 function initLevel() {
     items.score.currentSubLevel = 0
     Core.shuffle(levels[items.currentLevel].melodies)
     items.multipleStaff.isPulseMarkerDisplayed = levels[items.currentLevel].pulseMarkerVisible
     items.isMetronomeVisible = levels[items.currentLevel].metronomeVisible
     nextSubLevel()
     currentNote = 0
 }
 
 function nextSubLevel() {
     if(items.score.currentSubLevel >= items.score.numberOfSubLevels)
         items.bonus.good("note")
     else
         initSubLevel()
 }
 
 function checkAnswer(pulseMarkerX) {
     currentNote++
     if(currentNote < items.multipleStaff.musicElementModel.count) {
         var accuracyLowerLimit = items.multipleStaff.musicElementRepeater.itemAt(currentNote).x
         var accuracyUpperLimit = accuracyLowerLimit + items.multipleStaff.musicElementRepeater.itemAt(currentNote).width
         if(pulseMarkerX >= accuracyLowerLimit && pulseMarkerX <= accuracyUpperLimit)
             items.multipleStaff.indicateAnsweredNote(true, currentNote)
         else {
             items.multipleStaff.indicateAnsweredNote(false, currentNote)
             items.isWrongRhythm = true
         }
     }
     if(currentNote > 0 && !items.multipleStaff.isMusicPlaying) {
         items.isWrongRhythm = true
         items.buttonsBlocked = true
         items.answerFeedbackTimer.restart()
     } else if((currentNote >= items.multipleStaff.musicElementModel.count - 1)) {
         items.buttonsBlocked = true
         items.answerFeedbackTimer.restart()
     }
 }
 
 function answerFeedback() {
     if(!items.isWrongRhythm) {
         items.score.currentSubLevel += 1
         items.score.playWinAnimation()
         items.audioEffects.play("qrc:/gcompris/src/core/resource/sounds/completetask.wav")
     } else {
         items.audioEffects.play("qrc:/gcompris/src/core/resource/sounds/crash.wav")
         items.crashPlayed = true
         items.answerFeedbackTimer.restart()
     }
 }
 
 function initSubLevel() {
     items.metronomeOscillation.stop()
     items.multipleStaff.stopAudios()
     currentNote = 0
     var currentSubLevelMelody = levels[items.currentLevel].melodies[items.score.currentSubLevel]
     items.multipleStaff.loadFromData(currentSubLevelMelody)
     items.background.isRhythmPlaying = true
     items.isWrongRhythm = false
 
     if(!isIntroductoryAudioPlaying && !items.iAmReady.visible)
         items.multipleStaff.play()
 
     items.buttonsBlocked = false
 }
 
 function nextLevel() {
     items.score.stopWinAnimation()
     items.currentLevel = Core.getNextLevel(items.currentLevel, numberOfLevel);
     initLevel()
 }
 
 function previousLevel() {
     items.score.stopWinAnimation()
     items.currentLevel = Core.getPreviousLevel(items.currentLevel, numberOfLevel);
     initLevel()
 }