'use strict';

var Node = require('./node');
var Block = require('./block');

/**
 * Initialize a `Attrs` node.
 *
 * @api public
 */

var Attrs = module.exports = function Attrs() {
  this.attributeNames = [];
  this.attrs = [];
  this.attributeBlocks = [];
};

// Inherit from `Node`.
Attrs.prototype = Object.create(Node.prototype);
Attrs.prototype.constructor = Attrs;

Attrs.prototype.type = 'Attrs';

/**
 * Set attribute `name` to `val`, keep in mind these become
 * part of a raw js object literal, so to quote a value you must
 * '"quote me"', otherwise or example 'user.name' is literal JavaScript.
 *
 * @param {String} name
 * @param {String} val
 * @param {Boolean} escaped
 * @return {Tag} for chaining
 * @api public
 */

Attrs.prototype.setAttribute = function(name, val, escaped){
  this.attributeNames = this.attributeNames || [];
  if (name !== 'class' && this.attributeNames.indexOf(name) !== -1) {
    throw new Error('Duplicate attribute "' + name + '" is not allowed.');
  }
  this.attributeNames.push(name);
  this.attrs.push({ name: name, val: val, escaped: escaped });
  return this;
};

/**
 * Remove attribute `name` when present.
 *
 * @param {String} name
 * @api public
 */

Attrs.prototype.removeAttribute = function(name){
  for (var i = 0, len = this.attrs.length; i < len; ++i) {
    if (this.attrs[i] && this.attrs[i].name == name) {
      delete this.attrs[i];
    }
  }
};

/**
 * Get attribute value by `name`.
 *
 * @param {String} name
 * @return {String}
 * @api public
 */

Attrs.prototype.getAttribute = function(name){
  for (var i = 0, len = this.attrs.length; i < len; ++i) {
    if (this.attrs[i] && this.attrs[i].name == name) {
      return this.attrs[i].val;
    }
  }
};

Attrs.prototype.addAttributes = function (src) {
  this.attributeBlocks.push(src);
};
