var actor = {};

var actor_urs = {};
var script_times = {};

var actor_spawns = {};

globalThis.class_use = function(script, config, base, callback)
{
  var file = Resources.find_script(script);

  if (!file) {
    var ret = Object.create(base);
    if (callback) callback(ret);
    return ret;
  }

  if (!actor_urs[file]) {
    var newur = Object.create(base);
    actor_urs[file] = newur;
    script_times[file] = io.mod(file);
    actor_spawns[file] = [];
  }

  var padawan = Object.create(actor_urs[file]);
  actor_spawns[file].push(padawan);
  padawan._file = file;
  padawan._root = file.dir();

  if (callback) callback(padawan);

  var script = Resources.replstrs(file);
  script = `(function() { var self = this; var $ = this.__proto__; ${script}; })`;
  
  var fn = os.eval(file,script);
  fn.call(padawan);

  if (typeof config === 'object')
    Object.merge(padawan,config);

  return padawan;
}

actor.hotreload = function()
{
  profile.cache("hotreload", "check");
  for (var i in script_times) {
    if (io.mod(i) > script_times[i]) {
      say(`HOT RELAODING ${i}`);
      script_times[i] = io.mod(i);
      var script = Resources.replstrs(i);
      script = `(function() {
  	var self = this;
	var $ = this.__proto__;
        ${script};
      })`;
      var fn = os.eval(i,script);
      
      for (var obj of actor_spawns[i]) {
        var a = obj;
	for (var t of a.timers)
	  t();
	a.timers = [];
	var save = json.decode(json.encode(a));
        fn.call(a);
	Object.merge(a,save);
	check_registers(a);
      }
    }
  }
  profile.endcache();
}

actor.spawn = function(script, config){
  if (typeof script !== 'string') return undefined;

  var padawan = class_use(script, config, actor);
  
  padawan.padawans = [];
  padawan.timers = [];
  padawan.master = this;
  Object.hide(padawan, "master","padawans");
  padawan.toString = function() { return script; }  
  check_registers(padawan);
  this.padawans.push(padawan);
  if (padawan.awake) padawan.awake();
  return padawan;
};

actor.tween = function(from,to,time,fn) {
  var stop = tween(from,to,time,fn);
  this.timers.push(stop);
  return stop;
}

actor.spawn.doc = `Create a new actor, using this actor as the master, initializing it with 'script' and with data (as a JSON or Nota file) from 'config'.`;

actor.rm_pawn = function(pawn)
{
  this.padawans.remove(pawn);
}

actor.timers = [];
actor.kill = function(){
  if (this.__dead__) return;
  this.timers.forEach(t => t());
  input.do_uncontrol(this);
  Event.rm_obj(this);
  if (this.master) this.master.rm_pawn(this);
  this.padawans.forEach(p => p.kill());
  this.padawans = [];
  this.__dead__ = true;
  actor_spawns[this._file].remove(this);
  if (typeof this.die === 'function') this.die();
  if (typeof this.stop === 'function') this.stop();
  if (typeof this.garbage === 'function') this.garbage();
  if (typeof this.then === 'function') this.then();
};

actor.kill.doc = `Remove this actor and all its padawans from existence.`;

actor.delay = function(fn, seconds) {
  var timers = this.timers;
  var stop = function() {
    timers.remove(stop);
    stop = undefined;
    rm();
  }

  function execute() {
    if (fn) fn();
    if (stop && stop.then) stop.then();
    stop();
  }
  
  stop.remain = seconds;
  stop.seconds = seconds;
  stop.pct = function() { return 1-(stop.remain / stop.seconds); };
  
  function update(dt) {
    profile.frame("timer");
    stop.remain -= dt;
    if (stop.remain <= 0) execute();
    profile.endframe();
  }
  
  var rm = Register.appupdate.register(update);
  
  timers.push(stop);
  return stop;
};
actor.delay.doc = `Call 'fn' after 'seconds' with 'this' set to the actor.`;

actor.interval = function(fn, seconds)
{
  var self = this;
  var stop;
  var usefn = function() {
    fn();
    stop = self.delay(usefn, seconds);
  }
  stop = self.delay(usefn, seconds);

  return stop;
}

actor.padawans = [];

global.app = Object.create(actor);
app.die = function() { os.quit(); }

return {actor, app};