var swipe, aBook=[], aQuestion=[], iBook, iQuestion, iAnswer;
	
$(document).ready( onDocumentReady );

function onDocumentReady() {
	pageInit(showBook);
}

function showBook() {
	menuSwitch("book");
	loadBook();
}

function loadBook() {
	jsonRequest("quiz", "load_book", {}, onBookResponse, "正在获取培训题库…请稍候");
}

function onBookResponse(res) {
	aBook=res.book_list;
	
	var html="";
	for (var i=0; i<aBook.length; i++) {
		var book=aBook[i];
		html+=div("div_book_item", 
			div("div_book_code", book.code)+
			div("div_book_title", book.title)+
			div("div_book_stats_group", 
				div("div_book_stats_item", "总共: "+book.question_num+"题")+
				div("div_book_stats_item", "已回答: "+book.finish_num+"题")+
				div("div_book_stats_item", "得分: "+book.score+"分")+
				div("div_book_stats_item", "正确: "+book.correct_num+"题") ),
					"iBook="+i+"; showQuestion()");
	}
	$("#div_book_group").html(html);
}

function showQuestion() {
	pageGo("question");
	loadQuestion();
}

function hideQuestion() {
	pageBack("menu", loadBook);
}

function loadQuestion() {
	var req={};
	req.book_uid=aBook[iBook].uid;
	jsonRequest("quiz", "load_question", req, onQuestionResponse, "正在获取题目……请稍候");
}

function onQuestionResponse(res) {
	aQuestion=res.question_list;
	$("#div_question_header_title").html(aBook[iBook].code+" - "+aBook[iBook].title);
	$("#div_answer_header_title").html(aBook[iBook].code+" - "+aBook[iBook].title);
	var html="";
	for (var i=0; i<aQuestion.length; i++) {
		var question=aQuestion[i];
		var result=question.result? div("div_question_"+(question.result.correct?"correct":"wrong"), "") : "";
		html+=div("div_question_item",
			div("div_question_code", (i+1)+".")+
			div("div_question_title", aQuestion[i].title)+
			result,
				"iQuestion="+i+"; showAnswer()");
	}
	if (getAccount().level=="RM") {
		html+=div("div_question_item", "添加新的题目", "showAddQuestion()");
	}
	$("#div_question_group").html(html);
	
	iQuestion=0;
	var html=div("div_answer_start","");
	for (i=0; i<aQuestion.length; i++) {
		html+=div("div_answer_frame", "", "", "div_answer_frame_"+i);
	}
	html+=div("div_answer_frame","", "", "div_answer_end");
	var wrap=div("swipe-wrap", html);
	$("#div_answer_swipe").html(wrap);
	for (i=0; i<aQuestion.length; i++) {
		loadAnswer(i);
	}
	$("#page_answer").show();
	var option = {
	  continuous: false,
	  disableScroll: false,
	  stopPropagation: false,
	  transitionEnd: refreshAnswer,
	  startSlide:0
	}
	swipe = new Swipe(document.getElementById("div_answer_swipe"), option);
	$("#page_answer").hide();
}

function loadAnswer(i) {
	var question=aQuestion[i];
	console.log(question);
	var html="";
	html+=div("div_answer_question", question.title);
	for (var j=0; j<question.answer_list.length; j++) {
		var answer=question.answer_list[j];
		var r=answer.rank;
		var status=(question.result && question.result.rank==r)?"on":"off";
		html+=div("div_answer_"+status,
			div("div_index_"+status, String.fromCharCode(64+answer.rank), "", "index_"+i+"_"+r)+answer.title,
				"selectAnswer("+r+")", "answer_"+i+"_"+r);
	}
	if (getAccount().level=="RM") {
		html+=div("div_answer_off", div("div_index_off", "+")+"添加答案选项", "showAddAnswer()");
	}
	if (question.photo) {
		html+=img("img_question_photo", "quiz/"+question.photo);
	}
	$("#div_answer_frame_"+i).html(html);
}

function startAnswer() {
	iQuestion=0;
	showAnswer();
}

function showAnswer() {
	swipe.slide(0,0);
	$("#page_answer").show();
	setTimeout(slideAnswer, 100);
}

function slideAnswer() {
	swipe.slide(iQuestion+1);
}

function refreshAnswer() {
	var i=swipe.getPos(), n=aQuestion.length;
	if (i==0) {
		$("#page_answer").hide();
	} else if (i==n+1) {
		$("#div_question_index").html("");
		checkResult();
	} else {
		iQuestion=i-1;
		var question=aQuestion[iQuestion];
		var aAnswer=question.answer_list;
		$("#div_question_index").html("第"+question.rank+"题");
		var bPrev=(iQuestion>0);
		$("#div_prev_question").toggle(bPrev);
		var bNext=(iQuestion<n-1);
		$("#div_next_question").toggle(bNext);
		var bSubmit=(iQuestion==n-1);
		$("#div_submit_result").toggle(bSubmit);
		var bHide=(iQuestion==0);
		$("#div_hide_answer").toggle(bHide);
		var percent=Math.floor(((iQuestion+1)*100)/n);
		$("#div_answer_progress").css("width", percent+"%");	
	}
}

function hideAnswer() {
	swipe.slide(0);
}

function selectAnswer(r) {
	if (aQuestion[iQuestion].result) {
		var r0=aQuestion[iQuestion].result.rank;
		$("#index_"+iQuestion+"_"+r0).attr("class", "div_index_off");
		$("#answer_"+iQuestion+"_"+r0).attr("class", "div_answer_off");
	}
	aQuestion[iQuestion].result={rank:r};
	$("#index_"+iQuestion+"_"+r).attr("class", "div_index_on");
	$("#answer_"+iQuestion+"_"+r).attr("class", "div_answer_on");
}

function nextQuestion() {
	swipe.next();
}

function prevQuestion() {
	swipe.prev();
}

function getBlank() {
	var blank=0;
	for (var i=0; i<aQuestion.length; i++) {
		blank += aQuestion[i].result?0:1;
	}
	return blank;
}	

function checkResult() {
	var blank=getBlank();
	if (blank>0) {
		showConfirm("还有"+blank+"道题未回答，是否提交?", "submitResult()");
	} else {
		showConfirm("是否确认提交?", "submitResult()");
	}
}		
	
function submitResult() {
	var list=[];
	for (var i=0; i<aQuestion.length; i++) {
		if (aQuestion[i].result) {
			list.push({uid:aQuestion[i].uid, rank:aQuestion[i].result.rank});
		}
	}

	var req={};
	req.book_uid=aBook[iBook].uid;
	req.result_list=list;	
	jsonRequest("quiz", "add_result", req, onSubmitResultResponse, "正在提交答案……请稍候");
}

function onSubmitResultResponse() {
	hideAnswer();
	loadQuestion();
}

/************ ADMIN ****************/

function showAddQuestion() {
	$("#input_add_question_title").val("");
	$("#div_add_question").show();
}

function hideAddQuestion() {
	$("#div_add_question").hide();
}

function submitAddQuestion() {
	var req={};
	req.book_uid=aBook[iBook].uid;
	req.title=$("#input_add_question_title").val();
	hideAddQuestion();
	jsonRequest("quiz", "add_question", req, loadQuestion);
}

function showAddAnswer() {
	$("#input_add_answer_title").val("");
	$("#div_add_answer").show();
}

function hideAddAnswer() {
	$("#div_add_answer").hide();
}

function submitAddAnswer(correct) {
	var req={};
	req.question_uid=aQuestion[iQuestion].uid;
	req.title=$("#input_add_answer_title").val();
	req.correct=correct;
	hideAddAnswer();
	jsonRequest("quiz", "add_answer", req, onAddAnswerResponse);
}

function onAddAnswerResponse(res) {
	aQuestion[iQuestion].answer_list.push(res);
	showAnswer();
}