var perfectCount=0;
var greatCount=0;
var goodCount=0;
var badCount=0;
var poorCount=0;

function drawNote(ctx){
    for(i=0;i<notesArray.length;i++){
	for(j=0;j<notesArray[i].length;j++){
	    var note = notesArray[i][j];
	    if(note.getLocate()<0) //note isn't in the screen.
		break;
	    var noteObj = (note.getLane()%2==0) ? ctx.obj["pink_notes"] : ctx.obj["blue_notes"];
	    PutSpriteF(ctx,58.984375+(note.getLane()-1)*11.71875,note.getLocate(),1,noteObj);
	}
    }
}

function drawBeam(ctx){
    if(APressed)
	PutSpriteF(ctx,58.984375,60,1,ctx.obj["beam"]);
    if(SPressed)
	PutSpriteF(ctx,58.984375+11.71875,60,1,ctx.obj["beam"]);
    if(DPressed)
	PutSpriteF(ctx,58.984375+11.71875*2,60,1,ctx.obj["beam"]);
    if(FPressed)
	PutSpriteF(ctx,58.984375+11.71875*3,60,1,ctx.obj["beam"]);
    if(JPressed)
	PutSpriteF(ctx,58.984375+11.71875*4,60,1,ctx.obj["beam"]);
    if(KPressed)
	PutSpriteF(ctx,58.984375+11.71875*5,60,1,ctx.obj["beam"]);
    if(LPressed)
	PutSpriteF(ctx,58.984375+11.71875*6,60,1,ctx.obj["beam"]);
    if(SemicolonPressed)
	PutSpriteF(ctx,58.984375+11.71875*7,60,1,ctx.obj["beam"]);
}

/*
  updateNote()
  Update a note's locate and dead or alive.
*/
function updateNote(){ 
    for(i=0;i<notesArray.length;i++){
	for(j=0;j<notesArray[i].length;j++){
	    var note = notesArray[i][j];

	    if(!note.isAlive()){
		notesArray[i].splice(j,1);
		continue;
	    }

	    note.updateLocate(note.getBPM(),1.0);

	    if(note.getLocate() >= 105 && note.isAlive() && AUTO){ // 105:line's locate
		note.autoSound();
		note.kill();
		notesArray[i].splice(j,1);
		continue;
	    }
	    // judge:POOR
	    if(note.isAlive() && note.getTime() + BAD < audioBGM.currentTime){
		note.kill();
		notesArray[i].splice(j,1);
		poorCount++;
		drawText(ctx,"judge","poor",35,"purple","center");
	    }

	}
    }
}

function resetResult(ctx){
    perfectCount=0;
    greatCount=0;
    goodCount=0;
    badCount=0;
    poorCount=0;
}

function showResult(){
    var resultScore = (perfectCount + greatCount + goodCount + badCount + poorCount)*5; // calculate MAX score.
    resultScore = Math.round((perfectCount*5 + greatCount*3 + goodCount*1)/resultScore*10000)/100;
    objsArray.push(new Obj(100,30,1,"perfect_count"));
    objsArray.push(new Obj(100,40,1,"great_count"));
    objsArray.push(new Obj(100,50,1,"good_count"));
    objsArray.push(new Obj(100,60,1,"bad_count"));
    objsArray.push(new Obj(100,70,1,"poor_count"));
    objsArray.push(new Obj(100,85,1,"result"));
    drawText(ctx,"perfect_count","PERFECT    "+perfectCount,40,"white","left",450,50);
    drawText(ctx,"great_count"  ,"GREAT      "+greatCount,40,"white","left",450,50);
    drawText(ctx,"good_count"   ,"GOOD       "+goodCount,40,"white","left",450,50);
    drawText(ctx,"bad_count"    ,"BAD        "+badCount,40,"white","left",450,50);
    drawText(ctx,"poor_count"   ,"POOR       "+poorCount,40,"white","left",450,50);
    drawText(ctx,"result"       ,"Your score is "+resultScore,40,"white","left",450,50);
    resetResult();
}


/*
 judge()
 Judge a player's input.
 */
function judge(lane,hitTime){
    var note1,note2; // The passage of time : note1 -> note2
    var diff1,diff2;
    note1=note2=null;
    diff1=diff2=0;
    var i;
    for(i=0;i<notesArray[lane-1].length;i++){
	var note = notesArray[lane-1][i];
	if(hitTime < note.getTime()-BAD || note.getTime()+BAD < hitTime)
	    break;
	note1 = notesArray[lane-1][i];
	if(i+1<notesArray[lane-1].length)
	    note2 = notesArray[lane-1][i+1];
	break;
    }

    if(note1==null){ // This input doesn't need judgement.
//	console.log("through the judgement");
	return;
    }
    diff1 = Math.abs(hitTime-note1.getTime());
    diff2 = (note2==null)? 100 : Math.abs(hitTime-note2.getTime());
    if(diff1<diff2){ // Input for note1.
	solveDiff(diff1,hitTime);
	note1.kill();
	notesArray[lane-1].splice(i,1);
    }else{                          // Input for note2.
	solveDiff(diff2,hitTime);
	note2.kill();
	notesArray[lane-1].splice(i+1,1);
    }
}

function solveDiff(diff,hitTime){
    if(diff<=PERFECT){
	perfectCount++;
	drawText(ctx,"judge","perfect",35,"yellow","center");
    }else if(diff<=GREAT){
	greatCount++;
	drawText(ctx,"judge","great",35,"green","center");
    }else if(diff<=GOOD){
	goodCount++;
	drawText(ctx,"judge","good",35,"blue","center");
    }else if(diff<=BAD){
	badCount++;
	drawText(ctx,"judge","bad",35,"red","center");
    }else{
//	console.log("judge error: hit:"+hitTime+" diff:"+diff);
    }
    
}

function loadNotes(filepath){

    var httpObj = jQuery.get(filepath,null,function(){
	var JSONObj = JSON.parse(httpObj.responseText);
	console.log("loadNotes : load '" + JSONObj.title + "'");

	for(i=0;i<JSONObj.notes.length;i++){
	    var note = JSONObj.notes[i];
	    noteAdd(note.time,note.lane,note.BPM);
	}
    }
    );

}


function noteAdd(time,lane,BPM){
     notesArray[lane-1].push(new Note(time,lane,BPM));
}

function initNotesArray(){
    for(var i=0;i<notesArray.length;i++)
	notesArray[i].length = 0;
}

function loadMusics(filepath){
    initNotesArray();
    drawText(ctx,"judge","",35,"purple","center");
    var httpObj = jQuery.get(filepath,null,function(){
	var JSONObj = JSON.parse(httpObj.responseText);
	console.log("loadNotes : load '" + JSONObj.title + "'");
	loadBGM(JSONObj.filepath+EXT); //EXT -> extension. defined at sound.js
	for(i=0;i<JSONObj.notes.length;i++){
	    var note = JSONObj.notes[i];
	    noteAdd(note.time,note.lane,note.BPM);
	}
	audioBGM.play();
    });
}

function loadMusicTitle(index){
    var filepath = musicsArray[index];
    var httpObj = jQuery.get(filepath,null,function(){
	var JSONObj = JSON.parse(httpObj.responseText);
	drawText(ctx,"music_title",JSONObj.title,60,"white","center",432,86);
    });
}