var syntaxErrors = function(code) {
  // trivial check of bracket curlyCount
  // should be file specific in the future
  // and understand the syntax of config file

  var normalCount = 0;
  var squareCount = 0;
  var curlyCount = 0;

  for (var i = 0, len = code.length; i < len; i++) {
    if (code[i] === '(') {
      normalCount++;
    }
    if (code[i] === ')') {
      normalCount--;
    }

    if (code[i] === '[') {
      squareCount++;
    }
    if (code[i] === ']') {
      squareCount--;
    }

    if (code[i] === '{') {
      curlyCount++;
    }
    if (code[i] === '}') {
      curlyCount--;
    }
  }
  var result = [];
  if (curlyCount > 0) {
    result.push("Missing a closing curly bracket }");
  }
  if (squareCount > 0) {
    result.push("Missing a closing square bracket ]");
  }
  if (normalCount > 0) {
    result.push("Missing a closing bracket )");
  }

  if (curlyCount < 0) {
    result.push("You have more closing curly brackets than needed }");
  }
  if (squareCount < 0) {
    result.push("You have more closing square brackets than needed ]");
  }
  if (normalCount < 0) {
    result.push("You have more closing brackets than needed )");
  }
  return result;
}

var unfilledVariables = function(code) {
   var result = [];
   var lines = code.split("\n");
   for (var i = 0, len = lines.length; i < len; i++) {
     var lineNumber = '' + (i + 1);
     var line = lines[i];
     var matches = line.match(/::.*::/gi)
     if(!matches) { continue; };
     for (var j=0, lenMatches = matches.length; j < lenMatches ; j++) {
       var match = matches[j];
       result.push("Line " + lineNumber + " - " + match);
     }
   }
   return result;
}



$(document).ready(function() {
  var editor = ace.edit("editor");
  //editor.setTheme("ace/theme/monokai");
  //editor.getSession().setMode("ace/mode/javascript");
  editor.setOptions({
    maxLines: 40
  });

  var onEditorChange = function(e) {
    value = editor.getValue();
    var errors = syntaxErrors(value);
    var message = errors.map(function(error) {
      return '<li>' + error + '</li>';
    }).join("");
    if (message === "") {
      message = " No errors! Everything is awesome!"
    }
    $("#syntax_errors").html(message);

    var variables = unfilledVariables(value);
    var variableMessages = variables.map(function(variable) {
      return '<li>' + variable + '</li>';
    }).join("");
    if (variableMessages === "") {

      variableMessages = "Everything is filled out!"
    }

    $("#unfilled_variables").html(variableMessages);
  };

  editor.on("change", onEditorChange );
  onEditorChange();

  editor.resize();

  $("#save_button").click(function() {
    var content = editor.getValue();
    $("#content").val(content);
    var filePath = $("#visible_file_path").val()
    $("#file_path").val(filePath)
    $("#update_form").submit();
  });
});