//var server="http://www.grammaticalframework.org:41296"
//var server="http://tournesol.cs.chalmers.se:41296";
var server="http://localhost:41296";
var grammars_url=server+"/grammars/";
var current_grammar_url=grammars_url+"Foods.pgf";

var tree_icon=server+"/translate/se.chalmers.cs.gf.gwt.TranslateApp/tree-btn.png";

function start_minibar() {
  var minibar=element("minibar");
  minibar.appendChild(div_id("menubar"));
  minibar.appendChild(div_id("surface"));
  minibar.appendChild(div_id("words"));
  minibar.appendChild(div_id("translations"));
  ///  jsonp(grammars_url+"grammars.cgi",""); // calls show_grammarlist
  show_grammarlist(["Phrasebook.pgf","Foods.pgf", "ResourceDemo.pgf"]) ;
}

function show_grammarlist(grammars) {
  var menu=empty("select");
  for(var i=0;i<grammars.length;i++) {
    var opt=empty("option");
    opt.setAttribute("value",grammars[i]);
    opt.innerHTML=grammars[i];
    menu.appendChild(opt);
  }
  menu.setAttribute("onchange","new_grammar(this)");
  var menubar=element("menubar");
  //  menubar.innerHTML="Grammar: ";
  //  menubar.appendChild(menu);
  menubar.appendChild(text("From: "));
  menubar.appendChild(empty_id("select","language_menu"));
  menubar.appendChild(button("Del","delete_last()"));
  menubar.appendChild(button("Clear","clear_all()"));
  menubar.appendChild(button("Random","generate_random()"));
  select_grammar(grammars[0]);
}

function new_grammar(menu) {
  select_grammar(menu.options[menu.selectedIndex].value);
}

function select_grammar(grammar_name) {
  current_grammar_url=grammars_url+grammar_name;
  jsonp(current_grammar_url,"show_languages");
}

function show_languages(grammar) {
  var r="";
  var lang=grammar.languages;
  var menu=element("language_menu");
  menu.setAttribute("onchange","new_language(this)");
  menu.grammar=grammar;
  menu.innerHTML="";
  for(var i=0; i<lang.length; i++) { 
    if(lang[i].canParse && (lang[i].name[0] !='D')) { /// to hide Disamb; should be made properly...
      var opt=empty("option");
      opt.setAttribute("value",""+i);
      opt.innerHTML=short_name(lang[i].name);
      menu.appendChild(opt);
    }
  }
  new_language(menu);
}

function short_name(cnc) {
  var s = "" ;
  for (var c = cnc.length - 3 ; c < cnc.length ; c++)
    s = s + cnc[c] ;
  return s ;
}

function new_language(menu) {
  var ix=menu.options[menu.selectedIndex].value;
  var langname=menu.grammar.languages[ix].name;
  menu.current={from: langname, input: ""};
  clear_all();
}

function clear_all1() {
  var menu=element("language_menu");
  menu.current.input="";
  menu.previous=null;
  element("surface").innerHTML="";
  element("translations").innerHTML="";
  return menu;
}

function clear_all() {
  get_completions(clear_all1());
}

function delete_last() {
  var menu=element("language_menu");
  if(menu.previous) {
    menu.current.input=menu.previous.input;
    menu.previous=menu.previous.previous;
    var s=element("surface");
    s.removeChild(s.lastChild);
    element("translations").innerHTML="";
    get_completions(menu);
  }
}

function generate_random() {
  jsonp(current_grammar_url+"?command=random&random="+Math.random(),"lin_random");

}

function lin_random(abs) {
  var menu=element("language_menu");
  var lang=menu.current.from;
  jsonp(current_grammar_url+"?command=linearize&tree="+encodeURIComponent(abs[0].tree)
	+"&to="+lang,
	"show_random")
	
}

function show_random(random) {
  var menu=clear_all1();
  var words=random[0].text.split(" ");
  for(var i=0;i<words.length;i++)
    add_word1(menu,words[i]+" ");
  element("words").innerHTML="...";
  get_completions(menu);
}

function get_completions(menu) {
  var c=menu.current;
  jsonp(current_grammar_url
	+"?command=complete"
	+"&from="+encodeURIComponent(c.from)
	+"&input="+encodeURIComponent(c.input),
	"show_completions");
}

function word(s) {
  var w=div_class("word",text(s));
  w.setAttribute("onclick",'add_word("'+s+'")');
  return w;
}

function add_word1(menu,s) {
  menu.previous={ input: menu.current.input, previous: menu.previous };
  menu.current.input+=s;
  element("surface").appendChild(span_class("word",text(s)));
}

function add_word(s) {
  var menu=element("language_menu");
  add_word1(menu,s);
  element("words").innerHTML="...";
  get_completions(menu);
}

function show_completions(completions) {
  var box=element("words");
  var menu=element("language_menu");
  var prefixlen=menu.current.input.length;
  var emptycnt=0;
  box.innerHTML="";
  for(var i=0;i<completions.length;i++) {
    var s=completions[i].text.substring(prefixlen);
    if(s.length>0) box.appendChild(word(s));
    else emptycnt++;
  }
  if(emptycnt>0)
    //setTimeout(function(){get_translations(menu);},200);
    get_translations(menu);
}

function get_translations(menu) {
  jsonp(current_grammar_url
	+"?command=translategroup"
	//	+"?command=translate"
	+"&from="+encodeURIComponent(menu.current.from)
	+"&input="+encodeURIComponent(menu.current.input),
	"show_translations")
}

function show_translations(translations) {
  var trans=element("translations");
  var cnt=translations.length;
  trans.innerHTML="";
  for(p=0;p<cnt;p++) {
    var t=translations[p];
    var lin=t.linearizations;
    var tbody=empty("tbody");
    tbody.appendChild(tr([th(text(t.to+":"))]));
    for(var i=0;i<lin.length;i++) {
      tbody.appendChild(tr([(text(lin[i].text))]));
      if (lin.length > 1) tbody.appendChild(tr([(text(lin[i].tree))]));
    }
    trans.appendChild(wrap("table",tbody));
  }
}


function toggle_img(i) {
  var tmp=i.src;
  i.src=i.other;
  i.other=tmp;
}


/*
se.chalmers.cs.gf.gwt.TranslateApp/align-btn.png

GET /grammars/Foods.pgf?&command=abstrtree&tree=Pred+(This+Fish)+(Very+Fresh)
GET /grammars/Foods.pgf?&command=parsetree&tree=Pred+(This+Fish)+Expensive&from=FoodsAfr
GET /grammars/Foods.pgf?&command=alignment&tree=Pred+(This+Fish)+Expensive
*/