var calendarView;
var emptyWeeks;
var emptyWeeksEnd;
var totalWeeks;

function SchCalendar_Export() {
    $("#formQuery").submit();
}

function getCalendarView() {
    if ($("#SchoolYearDropdown").length > 0 && $.data($("#SchoolYearDropdown")[0], "combobox")) {
        var schoolYearID = $("#SchoolYearDropdown").combobox("getValue");

        $.post(calenderUrl, { schoolYearID: schoolYearID }, function (data) {
            if (data.IsSuccess) {
                calendarView = data.Data;
                draw();
            } else {
                $.messager.alert("系统提示", data.Message);
            }
        })
    }
}
//需要在getTotalWeeks方法调用之后才调用，有依赖关系
function getWeeksOfMonth(month) {
    //var isParaMonth = false;
    var startDate = eval('new ' + eval(calendarView.StartDate).source);
    var beginDate = startDate.addDay(-1);
    var weekCount = 0;
    for (var i = 0; i < totalWeeks; i++) {
        var curWeekStart = beginDate.addDay(1 + (i * 7));
        var curWeekEnd = beginDate.addDay((i + 1) * 7);
        if (curWeekEnd.getMonth() == (month - 1)) {  //javascript的月份是从0开始的
            //isParaMonth = true;
            weekCount++;
        }
//         else if (isParaMonth && (curWeekStart.getMonth() == (month - 1))) {
//            weekCount++;
//            break;
//        }
    }

    return weekCount;
}

function getTotalWeeks() {
    var startDate = eval('new ' + eval(calendarView.StartDate).source);
    var endDate = eval('new ' + eval(calendarView.EndDate).source);
    var firstWeek = eval('new ' + eval(calendarView.SchoolYear.FirstWeek).source);
    emptyWeeks = Math.ceil(firstWeek.substractDay(startDate) / 7);
    emptyWeeksEnd = Math.floor(endDate.substractDay(firstWeek.addDay(calendarView.SchoolYear.WeeksNum * 7)) / 7);

    totalWeeks = calendarView.SchoolYear.WeeksNum + emptyWeeks + emptyWeeksEnd;
}

function draw() {
    var html = new Array();
    getTotalWeeks();

    html.push('<table class="calendarview-table" width="100%" height="100%" border="0" cellpadding="0" cellspacing="0">');
    html.push(getTitleRow());
    html.push(getMonthTitleRow());
    html.push(getDayRows());
    html.push(getWeekTitleRow());
    html.push('</table>');
    html.push('<br>注：表上有★者为法定节假日，停课，不补课；有阴影的为寒暑假时间。<br/>');
    html.push('<br>法定节假日：' + calendarView.HolidayStr + '<br/>');
    html.push('<br>校内安排：' + calendarView.ScalendarStr + '<br/>');
    $("#calendarviewcontent").html(html.join("\n"));
    drawSplashLine($(".calendarview-monthtitle-left")[0]);
}

function getTitleRow() {
    var html = new Array();
    html.push(' <tr>');
//    html.push('     <td class="calendarview-title" colspan="' + (totalWeeks + 1) + '">'
    //        .concat(calendarView.UniversityName, calendarView.SchoolYear.Years, '学年', calendarView.SchoolYear.SchoolcodeName, '校历</td>'));
    html.push('     <td class="calendarview-title" colspan="' + (totalWeeks + 1) + '">'
        .concat(calendarView.UniversityName, calendarView.SchoolYear.Code, '学期校历</td>'));
    html.push(' </tr>');

    return html.join("\n");
}

function getConner() { 
    var html = new Array();
    
    html.push('<table width="100%" height="100%" border="0" cellpadding="0" cellspacing="0">');
    html.push(' <tr>');  
    html.push('     <td></td>');  
    html.push('     <td>月份</td>');  
    html.push(' </tr>');  
    html.push(' <tr>');
    html.push('     <td>星期</td>');
    html.push('     <td></td>');  
    html.push(' </tr>');
    html.push('</table>');

    return html.join("\n");
}

function getMonthTitleRow() {
    var html = new Array();
    var endDate = eval('new ' + eval(calendarView.EndDate).source);

    html.push(' <tr>');
    html.push('     <td class="calendarview-monthtitle-left">' + getConner() + '</td>');
    for (var i = 0; i < calendarView.Months.length; i++) {
        var monthWeekCount = getWeeksOfMonth(calendarView.Months[i].Month);
        if (i == (calendarView.Months.length - 1) && endDate.getMonth() > (calendarView.Months[i].Month - 1)) monthWeekCount++;
        html.push('     <td class="calendarview-monthtitle" colspan="' + monthWeekCount + '">');
        html.push('         '.concat(calendarView.Months[i].ChineseName, '</td>'));
    }
    html.push(' </tr>');

    return html.join("\n");
}

function getWeekTitleRow() {
    var html = new Array();

    html.push(' <tr>');
    html.push('     <td class="calendarview-weektitle-left">周次</td>');
    for (var i = 0; i < totalWeeks; i++) {
        html.push('     <td class="calendarview-weektitle">');
        if (i >= emptyWeeks && i < (emptyWeeks + calendarView.SchoolYear.WeeksNum)) {
            html.push(calendarView.WeekNums[i - emptyWeeks].ChineseName);
        } else { 
            html.push('&nbsp;');
        }
        html.push('</td>');
    }
    html.push(' </tr>');

    return html.join("\n");
}

function getDayRows() {
    var html = new Array();
    var startDate = eval('new ' + eval(calendarView.StartDate).source);
    var firstWeek = eval('new ' + eval(calendarView.SchoolYear.FirstWeek).source);

    for (var i = 0; i < 7; i++) {
        html.push(' <tr>');
        html.push('     <td class="calendarview-days-left">' + calendarView.WeekDays[i].ChineseName + '</td>');

        var rowStartDate = startDate.addDay(i);

        for (var j = 0; j < totalWeeks; j++) {
            var curDate = rowStartDate.addDay(j * 7);
            html.push('     <td class="calendarview-days');
            if (curDate < firstWeek ||
                curDate > firstWeek.addDay(calendarView.SchoolYear.WeeksNum * 7)) {
                html.push(' calendar-emptyday');
            }
            html.push('">');
            html.push(curDate.getDate());
            if ($.grep(calendarView.Holidays, function (val, index) { return eval('new ' + eval(val).source).valueOf() == curDate.valueOf(); }).length > 0) {
                html.push('★');
            }
            html.push('</td>');
        }

        html.push(' </tr>');
    }

    return html.join("\n");
}

function getTop(tdobj) {
	vParent = tdobj.offsetParent;
	t = tdobj.offsetTop;
	while (vParent.tagName.toUpperCase() != "BODY") {
		t += vParent.offsetTop;
		vParent = vParent.offsetParent;
	}
	return t;
}

function getLeft(tdobj) {
	vParent = tdobj.offsetParent;
	t = tdobj.offsetLeft;
	while (vParent.tagName.toUpperCase() != "BODY") {
		t += vParent.offsetLeft;
		vParent = vParent.offsetParent;
	}
	return t;
}
function line(startX, startY, endX, endY, container) {
    if (startX == endX) {
        if (startY > endY) {
            var tempY = startY;
            startY = endY;
            endY = tempY;
        }
        for (var k = startY; k < endY; k++) {
            createPoint(container, startX, k);
        }
    }
    // y = ax + b
    var a = (startY - endY) / (startX - endX);
    var b = startY - ((startY - endY) / (startX - endX)) * startX;
    if (Math.abs(startX - endX) > Math.abs(startY - endY)) {
        if (startX > endX) {
            var tempX = endX;
            endX = startX;
            startX = tempX;
        }
        var left = $(container).offset().left;
        var top = $(container).offset().top;
        for (var i = startX; i <= endX; i++) {
            createPoint(container, i, a * i + b);
        }
    } else {
        if (startY > endY) {
            var tempY = startY;
            startY = endY;
            endY = tempY;
        }
        for (var j = startY; j <= endY; j++) {
            createPoint(container, (j - b) / a, j);
        }
    }

}

function createPoint(container, x, y) {
    var node = document.createElement('div');
    node.className = 'line';
    container.appendChild(node);

    $(node).offset({
        left: x,
        top: y
    });
}
//line(1,1,100,100,"000000");
function drawSplashLine(container) {
    line(getLeft(container), getTop(container), getLeft(container) + container.offsetWidth,
		getTop(container) + container.offsetHeight, container);
}