/*
* Author:      Marco Kuiper (http://www.marcofolio.net/)
*/

// Speed of the automatic slideshow
var slideshowSpeed = 5000;

// Variable to store the images we need to set as background
// which also includes some text and url's.
// TODO: make this a jsonic object
/*var photos = [ {
        "title" : "",
        "image" : "../../images/1200x0355_010pct_0000FF.png",
        "url" : "index.html",
        "firstline" : "",
        "secondline" : "The Inn at Southbridge is located on Main Street in the historic town of St. Helena in the heart of America's most famous winegrowing region."
    }, {
        "title" : "",
        "image" : "../../images/1200x0355_squid.png",
        "url" : "rooms_list.html",
        "firstline" : "",
        "secondline" : "French doors open onto private balconies affording views of the courtyard, health spa or hillsides. Reserve Now."
    }, {
        "title" : "",
        "image" : "../../images/1200x0355_010pct_FF00FF.png",
        "url" : "seasonal_offerings_list.html",
        "firstline" : "",
        "secondline" : "Enjoy Your Time in Napa Valley with Special Offerings at The Inn at Southbridge."
    }, {
        "title" : "",
        "image" : "../../images/1200x0355_snow_car.png",
        "url" : "st_helena.html",
        "firstline" : "",
        "secondline" : "The Inn at Southbridge is nestled into its own tiny neighborhood at the southern entrance to beautiful downtown St. Helena."
    }
];*/



$(document).ready(function() {
        
    // Backwards navigation
    $("#back").click(function() {
        stopAnimation();
        navigate("back");
    });
    
    // Forward navigation
    $("#next").click(function() {
        stopAnimation();
        navigate("next");
    });
    
    var interval;
    $("#control").toggle(function(){
        stopAnimation();
    }, function() {
        // Change the background image to "pause"
        $(this).css({ "background-image" : "url(images/btn_pause.png)" });
        
        // Show the next image
        navigate("next");
        
        // Start playing the animation
        interval = setInterval(function() {
            navigate("next");
        }, slideshowSpeed);
    });
    
    
    var activeContainer = 1;    
    var currentImg = 0;
    var animating = false;
    var navigate = function(direction) {
        // Check if no animation is running. If it is, prevent the action
        if(animating) {
            return;
        }
        
        // Check which current image we need to show
        if(direction == "next") {
            currentImg++;
            if(currentImg == photos.length + 1) {
                currentImg = 1;
            }
        } else {
            currentImg--;
            if(currentImg == 0) {
                currentImg = photos.length;
            }
        }
        
        // Check which container we need to use
        var currentContainer = activeContainer;
        if(activeContainer == 1) {
            activeContainer = 2;
        } else {
            activeContainer = 1;
        }
        
        showImage(photos[currentImg - 1], currentContainer, activeContainer);
        
    };
    
    var currentZindex = -1;
    var showImage = function(photoObject, currentContainer, activeContainer) {
        animating = true;
        
        // Make sure the new container is always on the background
        currentZindex--;
        
        // Set the background image of the new active container
        $("#headerimg" + activeContainer).css({
            "background-image" : "url(" + photoObject.image + ")",
            "display" : "block",
            "z-index" : currentZindex
        });
        
        // Hide the header text
        $("#headertxt").css({"display" : "none"});
        
        // Set the new header text
        $("#firstline").html(photoObject.firstline);
        $("#secondline")
            .attr("href", photoObject.url)
            .html(photoObject.secondline);
        $("#pictureduri")
            .attr("href", photoObject.url)
            .html(photoObject.title);
        
        
        // Fade out the current container
        // and display the header text when animation is complete
        $("#headerimg" + currentContainer).fadeOut(function() {
            setTimeout(function() {
                $("#headertxt").css({"display" : "block"});
                animating = false;
            }, 500);
        });
    };
    
    var stopAnimation = function() {
        // Change the background image to "play"
        $("#control").css({ "background-image" : "url(images/btn_play.png)" });
        
        // Clear the interval
        clearInterval(interval);
    };
    
    // We should statically set the first image
    navigate("next");
    
    // Start playing the animation
    interval = setInterval(function() {
        navigate("next");
    }, slideshowSpeed);
    
});