var uploader;
var upload = {
        file: null,
        offset: 0
    }
// Convert divs to queue widgets when the DOM is ready
$(document).ready(function(){
    
    uploader = $("#uploader").plupload({
        // General settings
        runtimes : 'html5,browserplus,gears,flash,silverlight',
        url : 'upload_script.php?targetdir='+actualFolder,
        chunk_size : '1mb',
        unique_names : false,
        max_retries: 5
        
    // Views to activate
        views: {
            list: true,
            thumbs: true, // Show thumbs
            active: 'thumbs'
        },
        
        // Flash settings
        flash_swf_url : '../js/plupload/Moxie.swf',

        // Silverlight settings
        silverlight_xap_url : '../js/plupload/Moxie.xap',
        preinit: attachCallbacks // attach callbacks before queue
    });
});

function retry(Up) {
        console.log('[plupload] restarted (retry)');
        upload.file.loaded = upload.offset;
        upload.file.status = plupload.UPLOADING;
        // the following is similar to uploader.start()
        // but starts a specific file at a specific position
        Up.state = plupload.STARTED;
        $('.plupload_header_content').html(header_content);
        Up.trigger('UploadFile', upload.file);
        Up.start();
    };
    
    
// attach callbacks for FileUploaded and Error
function attachCallbacks(Uploader) {
    Uploader.bind('UploadComplete', function(Up, Files) {
        var length = Files.length;
        //console.log(length);
        var file_list='';
        for (var i = 0; i < length; i++) {
              file_list = file_list+Files[i]['name']+',';
        }
    });
    var allowrew='n';
    Uploader.bind('BeforeUpload', function(Up, File) {
        upload.file = File;
        upload.offset = 0;
        window.addEventListener("offline", function () {
            console.log('[plupload] stopped (offline)');
            Uploader.stop();
        }, false);
        
        window.addEventListener("online", function () {
            console.log('[plupload] restarted (online)');
            if(upload.file === null) {
                return false;
            }
            retry(Uploader);
        }, false);
        $.ajax({
            type: "GET",
            url: "checkFimeName.php",
            data: "f="+File.name+"&targetdir="+actualFolder,
            success: function(response){
                if(response=='si' && allowrew=='n'){
                    Uploader.stop();
                    var answer = confirm("Il file "+File.name+" esiste già. Sovrascriverlo?")
                    if (answer){
                        allowrew='s';
                        Uploader.start();
                    }else{
                        Uploader.removeFile(File);
                        Uploader.start();
                        if(Uploader.total.queued == 0) {
                            
                        }
                    }
                };
            }
        });
    });
    Uploader.bind('ChunkUploaded', function(up, file, info) {
        upload.offset = info.offset;
    });
    Uploader.bind('FileUploaded', function(Up, File) {
        allowrew='n';
        upload.file = null;
    });
    
    Uploader.bind('Error', function(up, error) {
        console.log(error.code)
        console.log(plupload.HTTP_ERROR)
        if(error.code !== plupload.HTTP_ERROR) {
            return true;
        }
        uploader.stop();
        console.warn('[plupload] stopped (HTTP Error)');
        window.setTimeout(function(){retry(up)}, 5000);
        return false
    });
}