var logTailId = -1;
 
$(document).ready(function () {
    $('#tail').click(function () {
        var $tail = $(this);
        if ($tail.text().indexOf('Stop') >= 0) {
            $tail.text('Tail...');
            clearTimeout(logTailId);
        }
        else {
            $tail.text('[ Stop Tail ]');
            getLogData(getNumRows(), getLogFileName(), true);
        }
        return false;
    });
 
    $('#viewLog').click(function () {
        getLogData(getNumRows(), getLogFileName(), false);
        return false;
    });
});
 
function getLogData(numRows, logFile, isTail) {
    var proxy = new ServiceProxy("ViewLog.aspx/");
    proxy.isWcf = false;
    proxy.invoke("GetLogTail", { logname: logFile, numrows: numRows },
        function (data) {
            displayLog(logFile, data);
            if (isTail) {
                var method = "getLogData(" + getNumRows() + ", '" + getLogFileName() + "', "+ isTail +")";
                logTailId = setTimeout(method, getNumSecs());
            }
        },
        function (errmsg) {
            clearTimeout(logTailId);
            alert(errmsg);
        },
        false);        // NOT bare
}
 
 
function clearLog() {
    $('#logDiv').html('');
}
 
function displayLog(logFile, data) {
    clearLog();
 
    var now= new Date();
    $('#lastUpdate').html( "<span style='font-style:italic'>(" + logFile + ") last update: " + now.format("n-j-y H:i:s ")  + "</span>");
 
    var $log = $('#logDiv');
    var logStr = "";
    for (var property in data) {
        logStr += formatLine(data[property]);
    }
    $log.html(logStr);
}
 
function getNumRows() {
    var numRows = 30;
    numRows = parseInt($('#<%=tbLines.ClientID %>').val(), 10);
    if (isNaN(numRows)) { numRows = 45; }
    return numRows;
}
 
function getNumSecs() {
    var numSecs = 5000;
    numSecs = parseInt($('#tailsecs').val(), 10);
    if (isNaN(numSecs)) {
        numSecs = 1000 * 5;
    } else {
        numSecs *= 1000;
    }
    return numSecs;
}
 
function getLogFileName() {
    var log = $('#<%=ddlLogFiles.ClientID %>').val();
    return log.replace("\\", "/");
}
 
function formatLine(line) {
    line = line.encodeHtml();
    if (line.toLowerCase().indexOf('info') === 0) {
        return "<span class='info'>" + line + "</span><br/>";
    } else if (line.toLowerCase().indexOf('error') === 0) {
        return "<span class='error'>" + line + "</span><br/>";
    } else if (line.toLowerCase().indexOf('warn') === 0) {
        return "<span class='warn'>" + line + "</span><br/>";
    } else if (line.toLowerCase().indexOf('debug') === 0) {
        return "<span class='debug'>" + line + "</span><br/>";
    } 
    return "<span>" + line + "</span><br/>";
}