/**
 * jCountr
 * Creates a countdown timer from a jQuery object. 
 *
 * $(<selector>).counter({params});
 *
 * @author agentor@gmx.de
 * @version 1.2 [2009-05-06]
 */
 
jQuery.fn.counter = function(params) {
    var self = this;

    self.display = $(this);
    self.hour = params.hour?params.hour:"0";
    self.min = params.min?params.min:"0";
    self.sec = params.sec?params.sec:"0";
    self.hour_end = params.hour_end?params.hour_end:"0";
    self.min_end = params.min_end?params.min_end:"0";
    self.sec_end = params.sec_end?params.sec_end:"0";
    self.message = params.message?params.message:"FINISHED";
    self.delimiter = params.delimiter?params.delimiter:":";
    self.return_url = params.return_url?params.return_url:"";
    self.finish_function = params.finish_function?params.finish_function:"";
    self.interval = params.interval?params.interval*1000:"1000";
    self.iteration = params.iteration?params.iteration:"1";
    self.direction = params.direction?params.direction:"down";
    
    self.timestamp = (self.hour * 60 * 60) + (self.min * 60) + (self.sec*1);
    self.timestamp_end = (self.hour_end * 60 * 60) + (self.min_end * 60) + (self.sec_end*1);
            
    self.onTick = params.onTick?params.onTick:function() { return true; };
    self.onFinish = params.onFinish?params.onFinish:function() { return true; };


    /** update the countdown while running **/
    self._updateCounter = function(params) {
        self.change_hour = params.change_hour?params.change_hour:"0";
        self.change_min = params.change_min?params.change_min:"0";
        self.change_sec = params.change_sec?params.change_sec:"0";
        self.change_direction = params.change_direction?params.change_direction:"up";
        self.hour = params.hour?params.hour:self.hour;
        self.min = params.min?params.min:self.min;
        self.sec = params.sec?params.sec:self.sec;
        self.hour_end = params.hour_end?params.hour_end:self.hour_end;
        self.min_end = params.min_end?params.min_end:self.min_end;
        self.sec_end = params.sec_end?params.sec_end:self.sec_end;
        self.message = params.message?params.message:self.message;
        self.delimiter = params.delimiter?params.delimiter:self.delimiter;
        self.return_url = params.return_url?params.return_url:self.return_url;
        self.finish_function = params.finish_function?params.finish_function:self.finish_function;
        self.interval = params.interval?params.interval*1000:self.interval;
        self.iteration = params.iteration?params.iteration:self.iteration;
        self.direction = params.direction?params.direction:self.direction;

        self.timestamp_end = (self.hour_end * 60 * 60) + (self.min_end * 60) + (self.sec_end*1);
        
        /** if we want to change the current countdown, there a two ways **/
        if(self.change_hour != 0 || self.change_min != 0 || self.change_sec != 0) {
            
            /** first, we can change the countdown with an specific time **/
            var temp_timestamp = self._createTimestamp(self.change_hour,self.change_min,self.change_sec);
            if(self.change_direction.match(/up/)) {
                self.timestamp += temp_timestamp;
            } else if(self.change_direction.match(/down/)) {
                self.timestamp -= temp_timestamp;
            } else {
                return;
            }
        } else {
            
            /** or we change the countdown to a specific time **/
            self.timestamp = (self.hour * 60 * 60) + (self.min * 60) + (self.sec*1);
        }
        return;
        
    };
    
    
    self._createTimestamp = function(hour,min,sec) {
        return (hour * 60 * 60) + (min * 60) + (sec*1)
    }

    /** get a counter from an timestamp **/
    self._getCounterFromTimestamp = function(t) {
        if (t > 0) {
            hours = Math.floor(t / 3600)
            minutes = Math.floor( (t / 3600 - hours) * 60)
            seconds = Math.round( ( ( (t / 3600 - hours) * 60) - minutes) * 60)
        } else {
            hours = 0;
            minutes = 0;
            seconds = 0;
        }
        
        if (seconds == 60)  {
            seconds = 0;
        }
        
        if(seconds == 0)  {
            if(hours != 0)     {
                minutes = minutes/1 + 1;
            }
        }
        
        if (minutes < 10)  {
            if (minutes < 0) {
                minutes = 0;
            }
            minutes = '0' + minutes;
        }
        if (seconds < 10) {
            if (seconds < 0) {
                seconds = 0;
            }
            seconds = '0' + seconds;
        }
        
        if (hours < 10) {
            if (hours < 0) {
                hours = 0;
            }
            hours = '0' + hours;
        }
        
        if(hours > 0) {
            return hours + self.delimiter + minutes + self.delimiter + seconds;
        } else {
            return minutes + self.delimiter + seconds;
        }
    };
       
    /** update the text for the countdown timer **/
    self._tick = function() {

        if(self.timestamp > 0 && self.timestamp != self.timestamp_end) {
            var counter = self._getCounterFromTimestamp(self.timestamp);
            
            /** show the current time **/
            self.display.html(counter);
            
            if(self.direction == "down") {
                self.timestamp = self.timestamp*1 - self.iteration*1;
            } else if(self.direction == "up") {
                self.timestamp = self.timestamp*1 + self.iteration*1;
            } else {
                return;
            }
        } else {
            window.clearInterval(self._interval);
            if (!self.onFinish(self.display)) { 
                return;
            }
            
            /** display the finish message **/
            self.display.html(self.message);
            
            /** if there is a function to call, call it **/
            if(self.finish_function != "") {
                eval(self.finish_function);
            }
            
            /** if there is a return url, go there **/
            if(self.return_url != "") {
                window.location.href = self.return_url;
            }
            return;
        }
    };
    
    
    /** do it **/
    self._tick();
    self._interval = window.setInterval(
        self._tick,
        self.interval
        );

    return this;
};