var AudioPlayer = function () {
    var instances = [];
    var activePlayerID;
    var playerURL = "";
    var defaultOptions = {};
    var currentVolume = -1;
    var requiredFlashVersion = "9";
    
    function getPlayer(playerID) {
        if (document.all && !window[playerID]) {
            for (var i = 0; i < document.forms.length; i++) {
                if (document.forms[i][playerID]) {
                    return document.forms[i][playerID];
                    break;
                }
            }
        }
        return document.all ? window[playerID] : document[playerID];
    }
    
    function addListener (playerID, type, func) {
        getPlayer(playerID).addListener(type, func);
    }
    
    return {
        setup: function (url, options) {
            playerURL = url;
            defaultOptions = options;
            if (swfobject.hasFlashPlayerVersion(requiredFlashVersion)) {
                swfobject.switchOffAutoHideShow();
                swfobject.createCSS("p.audioplayer_container span", "visibility:visible;height:24px;overflow:hidden;padding:0;border:none;");
            }
        },

        getPlayer: function (playerID) {
            return getPlayer(playerID);
        },
        
        addListener: function (playerID, type, func) {
            addListener(playerID, type, func);
        },
        
        embed: function (elementID, options) {
            var instanceOptions = {};
            var key;
            
            var flashParams = {};
            var flashVars = {};
            var flashAttributes = {};
    
            // Merge default options and instance options
            for (key in defaultOptions) {
                instanceOptions[key] = defaultOptions[key];
            }
            for (key in options) {
                instanceOptions[key] = options[key];
            }
            
            if (instanceOptions.transparentpagebg == "yes") {
                flashParams.bgcolor = "#FFFFFF";
                flashParams.wmode = "transparent";
            } else {
                if (instanceOptions.pagebg) {
                    flashParams.bgcolor = "#" + instanceOptions.pagebg;
                }
                flashParams.wmode = "opaque";
            }
            
            flashParams.menu = "false";
            
            for (key in instanceOptions) {
                if (key == "pagebg" || key == "width" || key == "transparentpagebg") {
                    continue;
                }
                flashVars[key] = instanceOptions[key];
            }
            
            flashAttributes.name = elementID;
            flashAttributes.style = "outline: none";
            
            flashVars.playerID = elementID;
            
            swfobject.embedSWF(playerURL, elementID, instanceOptions.width.toString(), "24", requiredFlashVersion, false, flashVars, flashParams, flashAttributes);
            
            instances.push(elementID);
        },
        
        syncVolumes: function (playerID, volume) {  
            currentVolume = volume;
            for (var i = 0; i < instances.length; i++) {
                if (instances[i] != playerID) {
                    getPlayer(instances[i]).setVolume(currentVolume);
                }
            }
        },
        
        activate: function (playerID, info) {
            if (activePlayerID && activePlayerID != playerID) {
                getPlayer(activePlayerID).close();
            }

            activePlayerID = playerID;
        },
        
        load: function (playerID, soundFile, titles, artists) {
            getPlayer(playerID).load(soundFile, titles, artists);
        },
        
        close: function (playerID) {
            getPlayer(playerID).close();
            if (playerID == activePlayerID) {
                activePlayerID = null;
            }
        },
        
        open: function (playerID, index) {
            if (index == undefined) {
                index = 1;
            }
            getPlayer(playerID).open(index == undefined ? 0 : index-1);
        },
        
        getVolume: function (playerID) {
            return currentVolume;
        }
        
    }
    
}();