var question = function (entry) {
    entry = entry || {};
    var rightAnswerArray = new Array();
    var WordSerial = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"];

    this.test_question_Id = entry.test_question_Id || 0;
    this.base_question_type_id = entry.base_question_type_id;
    this.content = entry.content;
    this.question_file_id = entry.question_file_id;
    this.answers = entry.answers;
    this.note = entry.note || "";
    this.test_question_libary_id = entry.test_question_libary_id;
    this.score = entry.score;
    this.difficulty_degree = entry.difficulty_degree;
    this.is_vaild = entry.is_vaild;
    this.libaryName = entry.libaryName;
    this.question_provid_answer = entry.question_provid_answer;
    this.TypeName = entry.TypeName;
    this.getEntry = function () {
        this.base_question_type_id = $("[id$=QuestionType]").combobox("getValue");
        this.content = $('[id$=content]').val();
        this.question_file_id = $('#questionUpload').next('#iptSingleFile').val();
        if (this.question_file_id == "null" || this.question_file_id == "") this.question_file_id = 0;
        this.note = $('[id$=note]').val();
        this.test_question_libary_id = $("[id$=txt_libary]").val();
        this.score = $('[id$=score]').val();
        this.difficulty_degree = $("[id$=difficulty_degree]").combobox("getValue");
        this.is_vaild = $("input[id*='is_vaild']:checked").val();
        this.test_question_Id = $("[id$=test_question_Id]").val();
        var questionType = $("[id$=QuestionType]").combobox("getText");
        this.question_provid_answer = getQuestionOption(questionType);
        this.answers = rightAnswerArray.join("|");
    }
    this.setEntry = function () {
        $("[id$=QuestionType]").combobox("setValue", this.base_question_type_id);
        $("[id$=QuestionType]").combobox("setText", this.TypeName);
        $('[id$=content]').val(this.content);
        $('[id$=questionUpload]').next('#iptSingleFile').val(this.question_file_id);
        $('[id$=note]').val(this.note);
        $("[id$=txt_libary]").val(this.test_question_libary_id);
        $('[id$=txtScore]').val(this.score);
        $("[id$=difficulty_degree]").combobox("setValue", this.difficulty_degree);
        $("input[id*='is_vaild'][value=" + this.is_vaild + "]").attr("checked", true);
        $('[id$=lblLibaryName]').html(this.libaryName);
        rightAnswerArray = this.answers.split(',');
        showOptions(this.question_provid_answer);
        createImg(this.question_file_id, $('[id$=questionUpload]'));
    }
    this.validateEntry = function () {
        $(".errorInput").removeClass("errorInput");

        if (isNull(this.test_question_libary_id)) {
            alert("请选择题库");
            $('[id$=ddlLibary]').addClass("errorInput");
            return false;
        }
        if (isNull(this.base_question_type_id)) {
            alert("请选择试题类型");
            $('[id$=ddlQuestionType]').addClass("errorInput");
            return false;
        }
        if (isNull(this.content)) {
            alert("题干不能为空");
            $('[id$=txtContent]').addClass("errorInput");
            return false;
        }
        if (isNull(this.difficulty_degree)) {
            alert("请选择难度系数");
            $('[id$=ddlDifficulty]').addClass("errorInput");
            return false;
        }
        if (isNull(this.score)) {
            alert("缺省分数不能为空");
            $('[id$=txtScore]').addClass("errorInput");
            return false;
        }
        var questionType = $("[id$=QuestionType]").combobox("getText");
        if (questionType == "单选题" || questionType == "多选题") {
            if (this.question_provid_answer.length == 0) {
                alert(questionType + "必须有选项");
                return false;
            }
            if (questionType == "单选题" && rightAnswerArray.length != 1) {
                alert(questionType + "只能有一个正确答案");
                return false;
            }
            if (questionType == "多选题" && rightAnswerArray.length == 0) {
                alert(questionType + "必须设置正确答案");
                return false;
            }
        }
        if (!checkOptionIsNull(this.question_provid_answer)) {
            alert("选项内容不能为空");
            return false;
        }
        return true;
    }
    function checkOptionIsNull(providAnswer) {
        var isFlag = true;
        $(providAnswer).each(function (i, ans) {
            if (isNull(ans.answer_name)) {
                isFlag = false;
                return false;
            }
        });
        return isFlag;
    }
    function showOptions(providAnswer) {
        $('.trOption').find('div').hide();
        var questionType = $("[id$=QuestionType]").combobox("getText");

        if (questionType == "单选题") {
            return showSingleOption(providAnswer);
        } else if (questionType == "多选题") {
            return showMultipleOption(providAnswer);
        } else if (questionType == "填空题") {
            return showFillOption(providAnswer);
        } else if (questionType == "是非题") {
            return showJudgeOption(providAnswer);
        } else if (questionType == "简答题") {
            return showShortOption(providAnswer);
        }
    }
    function showSingleOption(providAnswer) {
        var reg1 = /^.{2}/;
        $(providAnswer).each(function (i, ans) {
            var tpl = $('#optionTpl').find('#trSingleTpl').clone();
            tpl.find("[name$=txtContext]").val(ans.answer_name.replace(reg1, ""));
            tpl.find("[id$=iptAnswerID]").val(ans.provid_answer_id);
            tpl.find('[id$=iptSingleFile]').val(ans.file_id);
            createImg(ans.file_id, tpl.find('[id$=singleUpload]'));
            var ckbRight;
            if (jQuery.inArray(ans.provid_answer_id.toString(), rightAnswerArray) > -1) {
                ckbRight = tpl.find("[id$=rdIsRight]");
            }
            tpl.insertBefore($('[id$=trSingle]').last());
            $(ckbRight).attr("checked", true); //兼容IE6啊
        });
        $('#divSingle').show();
    }
    function showMultipleOption(providAnswer) {
        var reg1 = /^.{2}/;
        $(providAnswer).each(function (i, ans) {
            var tpl = $('#optionTpl').find('#trMultipleTpl').clone();
            tpl.find("[name$=txtContext]").val(ans.answer_name.replace(reg1, ""));
            tpl.find("[id$=iptAnswerID]").val(ans.provid_answer_id);
            tpl.find('[id$=iptSingleFile]').val(ans.file_id);
            createImg(ans.file_id, tpl.find('[id$=singleUpload]'));
            var ckbRight;
            if (jQuery.inArray(ans.provid_answer_id.toString(), rightAnswerArray) > -1) {
                ckbRight = tpl.find("[id$=ckbIsRight]");
            }
            tpl.insertBefore($('[id$=trMultiple]').last());
            $(ckbRight).attr("checked", true); //兼容IE6啊
        });
        $('#divMultiple').show();
    }
    function showFillOption(providAnswer) {
        var reg1 = /^.{2}/;
        $(providAnswer).each(function (i, ans) {
            var tpl = $('#optionTpl').find('#trFillTpl').clone();
            tpl.find("[name$=txtContext]").val(ans.answer_name);
            tpl.find("[id$=iptAnswerID]").val(ans.provid_answer_id);
            tpl.find('[id$=iptSingleFile]').val(ans.file_id);

            createImg(ans.file_id, tpl.find('[id$=fillUpload]'));
            tpl.insertBefore($('[id$=trFill]').last());
        });
        $('#divFill').show();
    }
    function showJudgeOption(providAnswer) {
        $(providAnswer).each(function (i, ans) {
            if (jQuery.inArray(ans.provid_answer_id.toString(), rightAnswerArray) > -1) {
                $("input[name='rdJudgeOption'][value=" + ans.answer_name + "]").attr("checked", true);
            }
        });
        $('#divJudge').show();
    }
    function showShortOption(providAnswer) {
        $(providAnswer).each(function (i, ans) {
            $('#divShort').find("[name='txtShortAnswer']").val(ans.answer_name);
        });
        $('#divShort').show();
    }

    function getQuestionOption(questionType) {

        if (questionType == "单选题") {
            return SingleOption();
        } else if (questionType == "多选题") {
            return MultipleOption();
        } else if (questionType == "填空题") {
            return FillOption();
        } else if (questionType == "是非题") {
            return JudgeOption();
        } else if (questionType == "简答题") {
            return ShortOption();
        }
    }

    function SingleOption() {
        var questionOptions = new Array();
        $("#tbSingle").find("tr").filter(function () {
            return $(this).find('[name$=txtContext]').length > 0;
        }).each(function (i, j) {
            var item = $(j);
            var answer_name = item.find('[name$=txtContext]').val();
            if (answer_name != undefined && answer_name != "") {
                answer_name = WordSerial[i] + "、" + answer_name;
            }
            var isRight = item.find('#rdIsRight').attr('checked');
            var iptAnswerID = item.find("[id='iptAnswerID']").val() || 0;
            if (isRight) {
                rightAnswerArray.push(answer_name);
            }
            var file_id = item.find('#iptSingleFile').val() || null;
            questionOptions.push({ provid_answer_id: iptAnswerID, answer_name: answer_name, isRight: isRight, file_id: file_id });
        });
        return questionOptions;
    }
    function MultipleOption() {
        var questionOptions = new Array();
        $("#tbMultiple").find("tr").filter(function () {
            return $(this).find('[name$=txtContext]').length > 0;
        }).each(function (i, j) {
            var item = $(j);
            var answer_name = item.find('[name$=txtContext]').val();
            if (answer_name != undefined && answer_name != "") {
                answer_name = WordSerial[i] + "、" + answer_name;
            }
            var isRight = item.find('#ckbIsRight').attr('checked');
            var iptAnswerID = item.find("[id='iptAnswerID']").val() || 0;
            if (isRight) {
                rightAnswerArray.push(answer_name);
            }
            var file_id = item.find('#iptSingleFile').val() || null;
            questionOptions.push({ provid_answer_id: iptAnswerID, answer_name: answer_name, isRight: isRight, file_id: file_id });
        });
        return questionOptions;
    }
    function FillOption() {
        var questionOptions = new Array();
        $("#tbFill").find("tr").filter(function () { return $(this).find('[name$=txtContext]').length > 0; }).each(function (i, j) {
            var item = $(j);
            var answer_name = item.find('[name$=txtContext]').val();
            var isRight = item.find('#ckbIsRight').attr('checked');
            var file_id = item.find('#iptSingleFile').val() || null;
            var iptAnswerID = item.find("[id='iptAnswerID']").val() || 0;
            rightAnswerArray.push(answer_name);
            questionOptions.push({ provid_answer_id: iptAnswerID, answer_name: answer_name, isRight: true, file_id: file_id });
        });
        return questionOptions;
    }
    function JudgeOption() {
        var questionOptions = new Array();
        var rightAnswer = $('#divJudge').find("input[name='rdJudgeOption']:checked").val();
        questionOptions.push({ answer_name: "正确", isRight: rightAnswer == "正确" });
        questionOptions.push({ answer_name: "错误", isRight: rightAnswer == "错误" });
        rightAnswerArray.push(rightAnswer);
        return questionOptions;
    }
    function ShortOption() {
        var questionOptions = new Array();
        var answer = $('#divShort').find("[name='txtShortAnswer']").val();
        var iptAnswerID = $('#divShort').find("[id='iptAnswerID']").val() || 0;
        rightAnswerArray.push(answer);
        questionOptions.push({ provid_answer_id: iptAnswerID, answer_name: answer, isRight: true });
        return questionOptions;
    }
}

$(function () {
    if (typeof queLogic == "undefined")
        showQuestionOption();

    $('[id$=ddlQuestionType]').change(function () {
        showQuestionOption();
    })
    $('[id$=btnSave]').click(function () { 
        var queLogic = new question();
        queLogic.getEntry();

        if (!queLogic.validateEntry()) {
            return false;
        }
        var inventoryJSONTextAgain = JSON.stringify(queLogic, null, 3);
        $('#question_provid_answer').val(JSON.stringify(queLogic.question_provid_answer))
        $('[id$=ipt_entry]').val(inventoryJSONTextAgain);
        $(document.forms[0]).submit();
    })

    $("textarea[maxlength]").bind('input propertychange', function () {
        var maxLength = $(this).attr('maxlength');
        if ($(this).val().length > maxLength) {
            $(this).val($(this).val().substring(0, maxLength));
            alert("限字数为300");
        }
    })
});

var uploadSender;

function UploadFileBefore(sender){
   uploadSender=sender;
   UploadFile();     
}
function GetUploadFileMessage(file_id, Url){
    $(uploadSender).parent().find('#iptSingleFile').val(file_id);
    $(uploadSender).parent().find('img').next("a").remove();
    $(uploadSender).parent().find('img').remove();
    createImg(file_id, uploadSender);
    $(uploadSender).parent().find('.singleUpload').hide();
}
function createImg(file_id,sender){    
    if(isNull(file_id)||isNull(sender))
        return;
    $(sender).parent().find('.singleUpload').hide();
    $(sender).before("<div style='text-align:center'><img src='../../ajaxmethod/picture.ashx?q=" + file_id + "' width='100' height='100'/><br/><a style='cursor: pointer;' onclick='deleteImg(this)'>删除</a></div>");
    //$(sender).before("<img src='../../ajaxmethod/picture.ashx?q=" + file_id + "' style='margin:0 auto;text-align:center;' width='100' height='100'/><br/><a style='cursor: pointer;' onclick='deleteImg(this)'>删除</a>");
}

function deleteImg(center) {
    $(center).parent().find('#iptSingleFile').val("");
    $(center).parent().find('img').remove();
    $(center).parent().find('br').remove();
    $(center).parent().parent().find('.singleUpload').show();

    $(center).remove(); 
   
    
}
function isNull(value) {
    return value == undefined || value == null || value == "";
}
    
function AddSingleRowHandler(){
    AddSingleRow('trSingle');
}
function AddFillRowHandler(){
    AddSingleRow('trFill');
}
function AddMultipleRowHandler() {
    AddSingleRow('trMultiple');
}
function AddSingleRow(target){
    $('#optionTpl').find('#'+target+'Tpl').clone().insertBefore($('[id$='+target+']').last());
}

function delRow(sender){
     $(sender).parent().parent().remove();
}

function showQuestionOption(index) {
    if (index == undefined)
        return;
    $('.trOption').find('div').hide();
    var data = $("[id$=QuestionType]").combobox("getData");
    var selQuestionType = data[index-1].Name;

   if (selQuestionType == "单选题" ) {
       var optionCount = $('#divSingle').find('[id=trSingleTpl]').length;
       for (var i = 0; i < 4 - optionCount; i++) {
           AddSingleRow('trSingle');
       }
       $('#divSingle').show();
       $('#spAnswerTip').show();
   } else if (selQuestionType == "多选题") {
       var optionCount = $('#divMultiple').find('[id=trMultipleTpl]').length;
       for (var i = 0; i < 4 - optionCount; i++) {
           AddSingleRow('trMultiple');
       }
       $('#divMultiple').show();
       $('#spAnswerTip').show();
   } else if (selQuestionType == "填空题") {
       if ($('#divFill').find('#trFillTpl').length == 0)
           AddSingleRow('trFill');
       $('#divFill').show();
       $('#spAnswerTip').show();
   } else if (selQuestionType == "是非题") {
       $('#divJudge').show();
       $('#spAnswerTip').hide();
   } else if (selQuestionType == "简答题") {
       $('#divShort').show();
       $('#spAnswerTip').hide();
   }
}