/**
 * Created by PJR on 8/3/2015.
 */

// global variables for preload
preload_state='pre_start';
preload_start=window.performance.now();
var debug_preload=false;

function preload_draw() {
    if (preload_state == 'pre_start') {
        if (debug_preload) console.log("In pre_start");
        if (debug_preload) console.log("Group " + cfg['group'] + ", workerid=[" + ServerHelper.workerId + "]");
        preload_state = 'start_wait';
        ServerHelper.start_request();
    } else if(preload_state=='start_wait'){
        if(ServerHelper.start_received) {
            if(ServerHelper.fatal_error) {
                if (debug_preload) console.log(ServerHelper.error);
                preload_state='done_preload';
                return;
            }
            if (debug_preload) console.log("Got config info, sessionToken= "+ServerHelper.sessionToken);
            // process configuration information into variables before continuing
            session=parse_config(ServerHelper.config_file);
            cfg_adjust();
            cfg['parsed']=true;
            if (ServerHelper.consent_string!='') {
                try {
                    consent_object = JSON.parse(ServerHelper.consent_string);
                    ServerHelper.consent_form = consent_object['consent_form'];
                } catch (e) {
                    console.log("error");
                    console.log(e);
                    ServerHelper.consent_form={};
                }
            } else {
                consent_form={};
            }
            preload_state='load_images';
        }
    } else if(preload_state=='load_images'){
        preload_images();
        if(ServerHelper.demo_mode || cfg['demo_mode']=='true') {
            // don't continue with preload -- no status or consent needed
            if (debug_preload) console.log("Demo mode, done with preload");
            return;
        }
        preload_state='log_config';
    } else if(preload_state=='log_config') {
        if (cfg['parsed']) { // don't continue until ready
            // put config into the response log to start
            response_log.push("Experiment app: " + _version);
            response_log.push("Source URL: " + document.URL);
            response_log.push("Run on " + new Date());
            response_log.push("");
            //response_log.push("##########");
            preload_state = 'request_status';
        }
    } else if(preload_state=='request_status') {
        ServerHelper.request_status();
        preload_state='wait_status';
    } else if(preload_state=='wait_status') {
        if (ServerHelper.status_received) {
            if (debug_preload) console.log("Status received");
            // parse status
            if(ServerHelper.status!='' && ServerHelper.status!='None') {
                if (debug_preload) {
                    console.log(ServerHelper.status);
                    console.log(ServerHelper.status_time);
                    console.log(ServerHelper.status_since);
                }
                t=ServerHelper.status.split(/\s+/);
                for(var i=0;i<t.length;i++) {
                    if(t[i]=='Trial:' && (i+1)< t.length) {
                        cfg['status-trials']=Number(t[i+1].trim());
                        if (debug_preload) console.log("Planning restart at trial "+cfg['status-trials']);
                        i++;
                    }
                    else if(t[i]=='Speed:' && (i+1)< t.length) {
                        cfg['status-speed']=Number(t[i+1].trim());
                        if (debug_preload) console.log("Planning restart at speed "+cfg['status-speed']);
                        i++;
                    }
                }
            }
            preload_state='done_preload';
        }
    } else if(preload_state=='done_preload') {
        // return without relaunching preload_draw
        if (debug_preload) {
            console.log("state: "+preload_state);
            console.log("Starting");
        }
        // start();
        return;
    } else {
        if (debug_preload) console.log("Unknown state "+preload_state);
    }

    console.log(preload_state);
    var elap=Math.floor((window.performance.now()-preload_start)/100.0); // 10ths of seconds since start
    var canvas = document.getElementById("mainWin");
    ctx.clearRect(0,0, canvas.width, canvas.height);
    if(elap<20) ctx.fillText("Loading...",canvas.width/2,canvas.height/2);
    else ctx.fillText("Loading slowly... "+(elap/10.0).toString(),canvas.width/2,canvas.height/2);
    requestId = window.requestAnimationFrame(preload_draw);
}


function preload_experiment(){
    preload_start=window.performance.now();
    //console.log("Starting preload "+preload_state)
    ctx.font = "24px Arial";
    ctx.fillStyle='black';
    ctx.textAlign="center";
    preload_draw();
}

// preloads the images -- but doesn't actually wait for load since it is not really needed for SISL
function preload_images(){
    var img_name_list=[];
    var im = new Image();

    ServerHelper.image_url+="sisl_images/"; // this could be drawn from config file to allow for image directories
    for(var i=0;i<session.length;i++) {
        if(session[i][0]=='Break:' && !contains(session[i][1],img_name_list)){
            img_name_list.push(session[i][1]);
        }
    }
    for(i=0;i<img_name_list.length;i++){
        im = new Image();
        im.src = ServerHelper.image_url+img_name_list[i];
        images[img_name_list[i]]=im;
    }
}