//======
//
// DeviceAct Application Framework for iPhone & iPad
//
// ver 0.1.0
//
// Copyright 2010, DeviceAct All rights reserved.
//
//======






//====== DeviceAct Object
$da = new Object();

//====== Setup at first of all (must be called form 'index.html' itself)
$da.setup = function(){
	document.addEventListener( "DOMContentLoaded", $da.onLoad, false );

	if (navigator.userAgent.indexOf("iPad", 0) > -1) {
	    document.write('<link rel="apple-touch-icon" href="' +$da.getMetaContent("da_icon_ipad")+ '" />');
	    document.write('<link rel="apple-touch-startup-image" href="' +$da.getMetaContent("da_splash_ipad")+ '" />');
	} else {
	    document.write('<link rel="apple-touch-icon" href="' +$da.getMetaContent("da_icon_iphone")+ '" />');
	    document.write('<link rel="apple-touch-startup-image" href="' +$da.getMetaContent("da_splash_iphone")+ '" />');
	}
	
	try{
		$da.waitForIdle(88, 12, 2); //--- Hack for iPhone Startup delay issue
	}catch(e){}
};

$da.onLoad = function() {
    //--- Check system at first
    if (typeof $g == "undefined") {
        document.getElementById("gcanvas").style.display = "none";
        document.getElementsByTagName("body")[0].innerHTML = '<iframe src="' +$da.getMetaContent("da_html_pc")+ '" frameborder="0" width="100%" height="100%"></iframe>';
        return false;
    }

    //--- Show installation messages
    if (!$g.isBrowserDebuggable() && ($da.isIPad() || $da.isIPhone())) {
        if (!window.navigator.standalone) {
            document.getElementById("gcanvas").style.display = "none";
            document.getElementsByTagName("body")[0].innerHTML = '<iframe src="' +$da.getMetaContent("da_html_ios")+ 
            	'" frameborder="0" width="100%" height="' +$da.getMetaContent("da_html_ios_height")+ '"></iframe>';
            return false;
        }
    }
    
    //--- Init ASAP to prevent flashing on iPhone & iPad (But after InstallMsg)
    $g.initSystem();

    //--- Check application cache
    if (window.applicationCache) {
    	window.applicationCache.daCheckAndNext(onInit);
    } else {
    	onInit();
    }
};

$da.getMetaContent = function(name_str){
	var objs = document.getElementsByTagName("meta");
	for (var i=0; i<objs.length; i++) {
	    if (objs[i].name == name_str) return objs[i].content;
	}
};

$da.isIPad = function () {
    return (navigator.userAgent.indexOf("iPad", 0) > -1);
};

$da.isIPhone = function () {
    return (navigator.userAgent.indexOf("iPhone", 0) > -1);
};

$da.isIPhone4 = function () {
    return (navigator.userAgent.indexOf("iPhone OS 4", 0) > -1);
};


//--- Orientation
$da.isVerticalOrientation = function () {
    return (window.orientation == 0 || window.orientation == 180);
};
$da.verticalWindowWidth = function () {
    var val = $da.verticalWindowWidth._val;
    if (!val) {
        val = (this.isVerticalOrientation()) ? window.innerWidth : window.innerHeight;
        $da.verticalWindowWidth._val = val;
    }
    return val;
};
$da.verticalWindowHeight = function () {
    var val = $da.verticalWindowHeight._val;
    if (!val) {
        val = (this.isVerticalOrientation()) ? window.innerHeight : window.innerWidth;
        $da.verticalWindowHeight._val = val;
    }
    return val;
};


//--- Time
$da.milliseconds = function () {
	return new Date().getTime();
};


//--- comfirm before link (for <a> tag only)
$da.confirmBeforeJump = function(){
    var msg = $da.getMetaContent("da_msg_confirmBeforeJump");
    if (!msg) msg = "Move to Safari?";
	if (confirm(msg)){
		return true;
	}else{
		event.preventDefault();
		return false;
	}
};

//--- Wait for Cool down
$da.waitForIdle = function(workMs, workCnt, loopSec){
	if (!workMs) workMs = 90;
	if (!workCnt) workCnt = 6;
	if (!loopSec) loopSec = 5;
	
  	var cnt = 0;
	var d = new Date();
	do { 
		d3 = new Date();
		for (var i=0; i<1000000; i++){}
		if((new Date())-d3 < workMs) cnt++;
		else cnt = 0;
		if (cnt > workCnt) break;
	}
	while((new Date())-d < loopSec*1000);
	
	return (cnt > workCnt);
};





//--- Extend applicationCache (not prototype)
window.applicationCache.daCheckAndNext = function(next_func){
	if (navigator.onLine) {
		this._daNextFunc = next_func;
	    this.onerror = function(e){this._daErr = e;};
		$g.setTimeout("_daCheckAndNext_exec", this, this._daCheckAndNext_exec, 100);
	}else{
		next_func();
	}
};

window.applicationCache._daCheckAndNext_exec = function(){
    var msg = $da.getMetaContent("da_msg_appUpdated");
    if (!msg) msg = "Application is updated!\nPlease restart now.";
    
	var goNext = false;
    var c = this;
	switch(c.status){
	case c.UPDATEREADY:
        	try {
            	c.swapCache();
            	alert(msg);
            } catch(e) {}
            goNext = true;
		break;
	case c.CHECKING:
	case c.DOWNLOADING:
		$g.setTimeout("_daCheckAndNext_exec", this, this._daCheckAndNext_exec, 100);
		break;
	default:
		if (c._daErr) alert("Download file not found.");
        goNext = true;
		break;
	}
	if (goNext) {
		var f = this._daNextFunc;
		this._daNextFunc = null;
		f();
	}
}