/*
 rules:
 * banner display initially displays after 'initial_display_interval' interval
 * banner message image swaps after 'swap_interval' interval (if active and not closed)
 * banner message image swaps 'max_swap' number of times
 * banner reshows after a close after 'reshow_interval' interval
 * banner reshows 'max_reshows' number of times
 * current datetime within time windows if time rule is active
 * timer runs every 'timer_interval' milliseconds to check status
 time intervals:
 initial banner display - 40s
 swap reminder - 2m
 reshow after closed - 3m
 session cookies:
 www.dentistryleads.com.banner.time.session     // initial timestamp (session start)
 www.dentistryleads.com.banner.time.display     // timestamp banner shown
 www.dentistryleads.com.banner.time.closed      // timestamp banner closed
 www.dentistryleads.com.banner.count.swap       // swap count for session
 www.dentistryleads.com.banner.count.reshow     // reshow count for session
 */
/* getValue(key) contains static, default values used in display rules */
function getValue(key){
    var value = null;
    switch (key) {
        // initial display interval in seconds
        case "initial_display_interval":
            //value = 4;
            value = 75;
            break
        // active swap display interval in seconds
        case "swap_interval":
            //value = 7;
            value = 120;
            break
        // closed reshow display interval in seconds
        case "reshow_interval":
            //value = 7;
            value = 180;
            break
        // number of times to swap
        case "max_swap":
            value = 10;
            break
        // number of times to reshow
        case "max_reshow":
            value = 2;
            break
        // timer interval in ms
        case "timer_interval":
            value = 5000;
            break
        // time rule active (1) /inactive (0)
        case "time_rule_active":
            value = "0";
            break
        // days the time rule is active
        // 0 = SUN, .. , 6 = SAT
        case "time_rule_days":
            value = "12345";
            break
        // time start if time rule active
        // use UTC time; +5 hours for CDT
        // 14 = 9AM
        case "time_start":
            value = "14";
            break
        // time end if time rule inactive
        // use UTC time; +5 hours for CDT
        // 22 = 5PM
        case "time_end":
            value = "22";
            break
        // base url and image for banner message a
        case "banner_msg_img_a":
            value = "/images/banner/bannerMessage_a.png";
            break
        // base url and image for banner message b
        case "banner_msg_img_b":
            value = "/images/banner/bannerMessage_b.png";
            break
    }
    return value;
}

/* main function each page calls to start timer for page */
function display_banner_start(){
    // check whether to initially show or hide display
    if (getDisplayTime() != null && getClosedTime() == null){
        showDisplayBanner();
       }
    else {
        hideDisplayBanner();
     }
    // check timestamp
    timestamp();
    // start timer
    timer();
}

/* hides banner display */
function hideDisplayBanner(){
    $("#display-banner").hide();
}

/* shows banner display (sets visible) */
function showDisplayBanner(){
    $("#display-banner").show();
}

/* shows and hides banner display based on current state */
function toggleBannerDisplay(){
    $("#display-banner").slideToggle("normal");
}

/* manages session start timestamp */
function timestamp(){
    // check to see if we have a current, valid timestamp cookie
    if ($.cookie('www.dentistryleads.com.banner.time.session') == null) 
        // no existing cookie, so set with current timestamp
        setSessionStart(new Date());
    else {
        // cookie exists, get age (in milliseconds)
        var age = diff(new Date(getSessionStart()));
        // check age, if older than 2 hours (7200s) reset 
        if (age > 7200) {
            setSessionStart(new Date());
            setDisplayTime(null);
            setClosedTime(null);
        }
    }
}

/* sets cookie value for session start time */
function setSessionStart(value){
    $.cookie('www.dentistryleads.com.banner.time.session', value);
}

/* returns cookie value for session start time */
function getSessionStart(){
    return $.cookie('www.dentistryleads.com.banner.time.session');
}

/* sets cookie value for last display time */
function setDisplayTime(value){
    $.cookie('www.dentistryleads.com.banner.time.display', value);
}

/* returns cookie value for last display time */
function getDisplayTime(){
    return $.cookie('www.dentistryleads.com.banner.time.display');
}

/* sets cookie value for closed time */
function setClosedTime(value){
    $.cookie('www.dentistryleads.com.banner.time.closed', value);
}

/* returns cookie value for closed time */
function getClosedTime(){
    return $.cookie('www.dentistryleads.com.banner.time.closed');
}

/* sets cookie value for swap count */
function incrementSwapCount(){
    if (getSwapCount() != null) 
        $.cookie('www.dentistryleads.com.banner.count.swap', parseInt(getSwapCount()) + 1);
    else 
        $.cookie('www.dentistryleads.com.banner.count.swap', 1);
}

/* returns cookie value for swap count */
function getSwapCount(){
    if ($.cookie('www.dentistryleads.com.banner.count.swap') == null) 
        return 0;
    else 
        return parseInt($.cookie('www.dentistryleads.com.banner.count.swap'));
}

/* sets cookie value for reshow count */
function incrementReshowCount(){
    if (getReshowCount() != null) 
        $.cookie('www.dentistryleads.com.banner.count.reshow', parseInt(getReshowCount()) + 1);
    else 
        $.cookie('www.dentistryleads.com.banner.count.reshow', 1);
}

/* returns cookie value for reshow count */
function getReshowCount(){
    if ($.cookie('www.dentistryleads.com.banner.count.reshow') == null) 
        return 0;
    else 
        return parseInt($.cookie('www.dentistryleads.com.banner.count.reshow'));
}

/* returns of a diff (in seconds) of current timestamp to parameter */
function diff(timestamp){
    return (new Date().getTime() / 1000 - new Date(timestamp).getTime() / 1000);
}

/* checks for the time rule, and if active checks time properties */
function timeRuleActive(date){
    var active = 0;
    if (getValue("time_rule_active") == 0) {
        active = 1;
    }
    else 
        if ((getValue("time_rule_active") == 1) &&
        (getValue("time_rule_days").toString().indexOf(date.getUTCDay().toString()) != -1) &&
        (date.getUTCHours() >= parseInt(getValue("time_start"))) &&
        (date.getUTCHours() <= parseInt(getValue("time_end")))) {
            active = 1;
        }
    return active;
}

/* main function containing rules/logic for displaying banner popup */
function display(){
    // get current datetime object
    var date = new Date();
    // time check - if time rule is active and we are in the window
    if (timeRuleActive(date) == 1) {
        // initial display logic
        if (getDisplayTime() == null && getClosedTime() == null) {
            if (getSessionStart() != null && diff(getSessionStart()) > parseInt(getValue("initial_display_interval"))) {
                setDisplayTime(date);
                toggleBannerDisplay();
                return;
            }
        }
        /* don't need this
        // swap logic
        if (getDisplayTime() != null && getClosedTime() == null && getSwapCount() <= parseInt(getValue("max_swap"))) {
            if (diff(getDisplayTime()) > parseInt(getValue("swap_interval"))) {
                setDisplayTime(date);
                incrementSwapCount();
                $("#bannerMessageImage").fadeOut("slow", function(){
                    if ($("#bannerMessageImage").attr("src") == getValue("banner_msg_img_a")) 
                        $("#bannerMessageImage").attr("src", getValue("banner_msg_img_b"));
                    else 
                        $("#bannerMessageImage").attr("src", getValue("banner_msg_img_a"));
                    $("#bannerMessageImage").fadeIn("slow");
                });
                return;
            }
        }
        */
        // reshow logic
        if (getClosedTime() != null && getDisplayTime() == null) {
            if (diff(getClosedTime()) > parseInt(getValue("reshow_interval")) &&
            getReshowCount() <= parseInt(getValue("max_reshow"))) {
                setClosedTime(null);
                setDisplayTime(date);
                incrementReshowCount();
                $.cookie('www.dentistryleads.com.banner.count.swap', 0);
                toggleBannerDisplay();
                return;
            }
        }
    }
}

/* function called clicking the close link in the ui; updates cookies and hides display */
function closeDisplay(){
    setClosedTime(new Date());
    setDisplayTime(null);
    toggleBannerDisplay();
}

/* timer function that calls the display logic at defined interval */
function timer(){
    $.timer(getValue("timer_interval"), function(timer){
        display();
        timer.reset(getValue("timer_interval"));
    });
}

/* reset (nullify) all session cookies for banner display */
function reset(){
    // explicitly clear (null/zero) cookie values
    $.cookie('www.dentistryleads.com.banner.time.session', null);
    $.cookie('www.dentistryleads.com.banner.time.display', null);
    $.cookie('www.dentistryleads.com.banner.time.closed', null);
    $.cookie('www.dentistryleads.com.banner.count.reshow', 0);
    $.cookie('www.dentistryleads.com.banner.count.swap', 0);
}