/***************************************************************************
 *   Copyright (C) 2009 by Evgeniy Sokolov                                 *
 *   [email protected]                                                   *
 ***************************************************************************/
/* $Id$ */

 var Form = RegulatedForm.extend({
  WRONG: 1,
  MISSING: 2,
  
  primitives: null,
  errors: null,
  labels: null,
  required: true,
  
  construct: function()
  {
   arguments.callee.$.construct.call(this);
   this.primitives = {};
   this.errors = {};
   this.labels = {};
   return this;
  },
  
  setRequired: function(required)
  {
   this.required = (required === true);
  },
  
  isRequired: function()
  {
   return this.required;
  },
  
  getErrors: function()
  {
   var errors = this.errors;
   
   for (name in this.violated)
    errors[name] = this.violated[name];
   
   return errors;
  },
  
  add: function(primitive)
  {
   this.primitives[primitive.getName()] = primitive;
  },
  
  get: function(name)
  {
   return this.primitives[name];
  },
  
  drop: function(name)
  {
   delete this.primitives[name];
   return this;
  },
  
  getPrimitiveList: function()
  {
   return this.primitives;
  },
  
  importForm: function(form)
  {
   this.errors = {};
   this.violated = {};
   
   for (primitiveName in this.primitives) {
    this.importPrimitive(this.primitives[primitiveName], form);
   }

   if (!this.isRequired() && this.isEmpty())
    this.errors = {};
  },
  
  importPrimitive: function(primitive, form)
  {
   return this.checkImportResult(
    primitive,
    primitive.importFromForm(form)
   );
  },
  
  checkImportResult: function(primitive, result)
  {
   var name = primitive.getName();
   
   if (null === result) {
    if (primitive.isRequired())
     this.errors[name] = this.MISSING;

   } else if (true === result) {
    delete this.errors[name];
    
   } else
    this.errors[name] = this.WRONG;

   return this;
  },

  addMissingLabel: function(primitiveName, label)
  {
   return this.addErrorLabel(primitiveName, this.MISSING, label);
  },
  
  addWrongLabel: function(primitiveName, label)
  {
   return this.addErrorLabel(primitiveName, this.WRONG, label);
  },

  addErrorLabel: function(name, errorType, label)
  {
   if (
    !this.get(name)
    && !this.getRule(name)
   )
    throw "knows nothing about '"+name+"'";

   if (!this.labels[name])
    this.labels[name] = {};
   
   this.labels[name][errorType] = label;
   
   return this;
  },
  
  getTextualErrorFor: function(name)
  {
   if (
    this.violated[name]
     && this.labels[name]
    && this.labels[name][this.violated[name]]
   )
    return this.labels[name][this.violated[name]];
   else if (
    this.errors[name]
    && this.labels[name]
    && this.labels[name][this.errors[name]]
   )
    return this.labels[name][this.errors[name]];
   else
    return null;
  },
  
  isEmpty: function()
  {
   for (primitiveName in this.primitives) {
    if (
     this.primitives[primitiveName].getValue()
     || this.errors[primitiveName] != this.MISSING
    )
     return false;
   } 
   
   return true;
  }
 });