/*==================================================
 *  Default Event Source
 *==================================================
 */


Timeline.DefaultEventSource = function(eventIndex) {
    this._events = (eventIndex instanceof Object) ? eventIndex : new Timeline.EventIndex();
    this._listeners = [];
};

Timeline.DefaultEventSource.prototype.addListener = function(listener) {
    this._listeners.push(listener);
};

Timeline.DefaultEventSource.prototype.removeListener = function(listener) {
    for (var i = 0; i < this._listeners.length; i++) {
        if (this._listeners[i] == listener) {
            this._listeners.splice(i, 1);
            break;
        }
    }
};

Timeline.DefaultEventSource.prototype.loadXML = function(xml, url) {
    var base = this._getBaseURL(url);
    
    var dateTimeFormat = xml.documentElement.getAttribute("date-time-format");
    var parseDateTimeFunction = this._events.getUnit().getParser(dateTimeFormat);

    var node = xml.documentElement.firstChild;
    var added = false;
    while (node != null) {
        if (node.nodeType == 1) {
            var description = "";
            if (node.firstChild != null && node.firstChild.nodeType == 3) {
                description = node.firstChild.nodeValue;
            }
            var evt = new Timeline.DefaultEventSource.Event(
                parseDateTimeFunction(node.getAttribute("start")),
                parseDateTimeFunction(node.getAttribute("end")),
                parseDateTimeFunction(node.getAttribute("latestStart")),
                parseDateTimeFunction(node.getAttribute("earliestEnd")),
                node.getAttribute("isDuration") != "true",
                node.getAttribute("title"),
                description,
                this._resolveRelativeURL(node.getAttribute("image"), base),
                this._resolveRelativeURL(node.getAttribute("link"), base),
                this._resolveRelativeURL(node.getAttribute("icon"), base),
                node.getAttribute("color"),
                node.getAttribute("textColor")
            );
            evt._node = node;
            evt.getProperty = function(name) {
                return this._node.getAttribute(name);
            };
            
            this._events.add(evt);
            
            added = true;
        }
        node = node.nextSibling;
    }

    if (added) {
        this._fire("onAddMany", []);
    }
};


Timeline.DefaultEventSource.prototype.loadJSON = function(data, url) {
    var base = this._getBaseURL(url);
    var added = false;  
    if (data && data.events){
        var dateTimeFormat = ("dateTimeFormat" in data) ? data.dateTimeFormat : null;
        var parseDateTimeFunction = this._events.getUnit().getParser(dateTimeFormat);
       
        for (var i=0; i < data.events.length; i++){
            var event = data.events[i];
            var evt = new Timeline.DefaultEventSource.Event(
                parseDateTimeFunction(event.start),
                parseDateTimeFunction(event.end),
                parseDateTimeFunction(event.latestStart),
                parseDateTimeFunction(event.earliestEnd),
                event.isDuration || false,
                event.title,
                event.description,
                this._resolveRelativeURL(event.image, base),
                this._resolveRelativeURL(event.link, base),
                this._resolveRelativeURL(event.icon, base),
                event.color,
                event.textColor
            );
            evt._obj = event;
            evt.getProperty = function(name) {
                return this._obj[name];
            };

            this._events.add(evt);
            added = true;
        }
    }
   
    if (added) {
        this._fire("onAddMany", []);
    }
};

/*
 *  Contributed by Morten Frederiksen, http://www.wasab.dk/morten/
 */
Timeline.DefaultEventSource.prototype.loadSPARQL = function(xml, url) {
    var base = this._getBaseURL(url);
    
    var dateTimeFormat = 'iso8601';
    var parseDateTimeFunction = this._events.getUnit().getParser(dateTimeFormat);

    if (xml == null) {
        return null;
    }
    
    /*
     *  Find <results> tag
     */
    var node = xml.documentElement.firstChild;
    while (node != null && (node.nodeType != 1 || node.nodeName != 'results')) {
        node = node.nextSibling;
    }
    
    if (node != null) {
        node = node.firstChild;
    }
    
    var added = false;
    while (node != null) {
        if (node.nodeType == 1) {
            var bindings = { };
            var binding = node.firstChild;
            while (binding != null) {
                if (binding.nodeType == 1 && 
                    binding.firstChild != null && 
                    binding.firstChild.nodeType == 1 && 
                    binding.firstChild.firstChild != null && 
                    binding.firstChild.firstChild.nodeType == 3) {
                    bindings[binding.getAttribute('name')] = binding.firstChild.firstChild.nodeValue;
                }
                binding = binding.nextSibling;
            }
            
            if (bindings["start"] == null && bindings["date"] != null) {
                bindings["start"] = bindings["date"];
            }
            
            var evt = new Timeline.DefaultEventSource.Event(
                parseDateTimeFunction(bindings["start"]),
                parseDateTimeFunction(bindings["end"]),
                parseDateTimeFunction(bindings["latestStart"]),
                parseDateTimeFunction(bindings["earliestEnd"]),
                bindings["isDuration"] != "true",
                bindings["title"],
                bindings["description"],
                this._resolveRelativeURL(bindings["image"], base),
                this._resolveRelativeURL(bindings["link"], base),
                this._resolveRelativeURL(bindings["icon"], base),
                bindings["color"],
                bindings["textColor"]
            );
            evt._bindings = bindings;
            evt.getProperty = function(name) {
                return this._bindings[name];
            };
            
            this._events.add(evt);
            added = true;
        }
        node = node.nextSibling;
    }

    if (added) {
        this._fire("onAddMany", []);
    }
};

Timeline.DefaultEventSource.prototype.add = function(evt) {
    this._events.add(evt);
    this._fire("onAddOne", [evt]);
};

Timeline.DefaultEventSource.prototype.clear = function() {
    this._events.removeAll();
    this._fire("onClear", []);
};

Timeline.DefaultEventSource.prototype.getEventIterator = function(startDate, endDate) {
    return this._events.getIterator(startDate, endDate);
};

Timeline.DefaultEventSource.prototype.getAllEventIterator = function() {
    return this._events.getAllIterator();
};

Timeline.DefaultEventSource.prototype.getCount = function() {
    return this._events.getCount();
};

Timeline.DefaultEventSource.prototype.getEarliestDate = function() {
    return this._events.getEarliestDate();
};

Timeline.DefaultEventSource.prototype.getLatestDate = function() {
    return this._events.getLatestDate();
};

Timeline.DefaultEventSource.prototype._fire = function(handlerName, args) {
    for (var i = 0; i < this._listeners.length; i++) {
        var listener = this._listeners[i];
        if (handlerName in listener) {
            try {
                listener[handlerName].apply(listener, args);
            } catch (e) {
                Timeline.Debug.exception(e);
            }
        }
    }
};

Timeline.DefaultEventSource.prototype._getBaseURL = function(url) {
    if (url.indexOf("://") < 0) {
        var url2 = this._getBaseURL(document.location.href);
        if (url.substr(0,1) == "/") {
            url = url2.substr(0, url2.indexOf("/", url2.indexOf("://") + 3)) + url;
        } else {
            url = url2 + url;
        }
    }
    
    var i = url.lastIndexOf("/");
    if (i < 0) {
        return "";
    } else {
        return url.substr(0, i+1);
    }
};

Timeline.DefaultEventSource.prototype._resolveRelativeURL = function(url, base) {
    if (url == null || url == "") {
        return url;
    } else if (url.indexOf("://") > 0) {
        return url;
    } else if (url.substr(0,1) == "/") {
        return base.substr(0, base.indexOf("/", base.indexOf("://") + 3)) + url;
    } else {
        return base + url;
    }
};


Timeline.DefaultEventSource.Event = function(
        start, end, latestStart, earliestEnd, instant, 
        text, description, image, link,
        icon, color, textColor) {
        
    this._id = "e" + Math.floor(Math.random() * 1000000);
    
    this._instant = instant || (end == null);
    
    this._start = start;
    this._end = (end != null) ? end : start;
    
    this._latestStart = (latestStart != null) ? latestStart : (instant ? this._end : this._start);
    this._earliestEnd = (earliestEnd != null) ? earliestEnd : (instant ? this._start : this._end);
    
    this._text = text;
    this._description = description;
    this._image = (image != null && image != "") ? image : null;
    this._link = (link != null && link != "") ? link : null;
    
    this._icon = (icon != null && icon != "") ? icon : null;
    this._color = (color != null && color != "") ? color : null;
    this._textColor = (textColor != null && textColor != "") ? textColor : null;
};

Timeline.DefaultEventSource.Event.prototype = {
    getID:          function() { return this._id; },
    
    isInstant:      function() { return this._instant; },
    isImprecise:    function() { return this._start != this._latestStart || this._end != this._earliestEnd; },
    
    getStart:       function() { return this._start; },
    getEnd:         function() { return this._end; },
    getLatestStart: function() { return this._latestStart; },
    getEarliestEnd: function() { return this._earliestEnd; },
    
    getText:        function() { return this._text; },
    getDescription: function() { return this._description; },
    getImage:       function() { return this._image; },
    getLink:        function() { return this._link; },
    
    getIcon:        function() { return this._icon; },
    getColor:       function() { return this._color; },
    getTextColor:   function() { return this._textColor; },
    
    getProperty:    function(name) { return null; },
    
    fillDescription: function(elmt) {
        elmt.innerHTML = this._description;
    },
    fillTime: function(elmt, labeller) {
        if (this._instant) {
            if (this.isImprecise()) {
                elmt.appendChild(elmt.ownerDocument.createTextNode(labeller.labelPrecise(this._start)));
                elmt.appendChild(elmt.ownerDocument.createElement("br"));
                elmt.appendChild(elmt.ownerDocument.createTextNode(labeller.labelPrecise(this._end)));
            } else {
                elmt.appendChild(elmt.ownerDocument.createTextNode(labeller.labelPrecise(this._start)));
            }
        } else {
            if (this.isImprecise()) {
                elmt.appendChild(elmt.ownerDocument.createTextNode(
                    labeller.labelPrecise(this._start) + " ~ " + labeller.labelPrecise(this._latestStart)));
                elmt.appendChild(elmt.ownerDocument.createElement("br"));
                elmt.appendChild(elmt.ownerDocument.createTextNode(
                    labeller.labelPrecise(this._earliestEnd) + " ~ " + labeller.labelPrecise(this._end)));
            } else {
                elmt.appendChild(elmt.ownerDocument.createTextNode(labeller.labelPrecise(this._start)));
                elmt.appendChild(elmt.ownerDocument.createElement("br"));
                elmt.appendChild(elmt.ownerDocument.createTextNode(labeller.labelPrecise(this._end)));
            }
        }
    },
    fillInfoBubble: function(elmt, theme, labeller) {
        var doc = elmt.ownerDocument;
        
        var title = this.getText();
        var link = this.getLink();
        var image = this.getImage();
        
        if (image != null) {
            var img = doc.createElement("img");
            img.src = image;
            
            theme.event.bubble.imageStyler(img);
            elmt.appendChild(img);
        }
        
        var divTitle = doc.createElement("div");
        var textTitle = doc.createTextNode(title);
        if (link != null) {
            var a = doc.createElement("a");
            a.href = link;
            a.appendChild(textTitle);
            divTitle.appendChild(a);
        } else {
            divTitle.appendChild(textTitle);
        }
        theme.event.bubble.titleStyler(divTitle);
        elmt.appendChild(divTitle);
        
        var divBody = doc.createElement("div");
        this.fillDescription(divBody);
        theme.event.bubble.bodyStyler(divBody);
        elmt.appendChild(divBody);
        
        var divTime = doc.createElement("div");
        this.fillTime(divTime, labeller);
        theme.event.bubble.timeStyler(divTime);
        elmt.appendChild(divTime);
    }
};