/*!
 * Module dependencies.
 */

var utils = require('../utils');

var SchemaType = require('../schematype');

/**
 * Boolean SchemaType constructor.
 *
 * @param {String} path
 * @param {Object} options
 * @inherits SchemaType
 * @api private
 */

function SchemaBoolean(path, options) {
  SchemaType.call(this, path, options, 'Boolean');
}

/**
 * This schema type's name, to defend against minifiers that mangle
 * function names.
 *
 * @api private
 */
SchemaBoolean.schemaName = 'Boolean';

/*!
 * Inherits from SchemaType.
 */
SchemaBoolean.prototype = Object.create( SchemaType.prototype );
SchemaBoolean.prototype.constructor = SchemaBoolean;

/**
 * Required validator
 *
 * @api private
 */

SchemaBoolean.prototype.checkRequired = function(value) {
  return value === true || value === false;
};

/**
 * Casts to boolean
 *
 * @param {Object} value
 * @api private
 */

SchemaBoolean.prototype.cast = function(value) {
  if (null === value) return value;
  if ('0' === value) return false;
  if ('true' === value) return true;
  if ('false' === value) return false;
  return !! value;
};

/*!
 * ignore
 */

function handleArray(val) {
  var self = this;
  if (!Array.isArray(val)) {
    return [self.cast(val)];
  }
  return val.map(function(m) {
    return self.cast(m);
  });
}

SchemaBoolean.$conditionalHandlers =
  utils.options(SchemaType.prototype.$conditionalHandlers, {
    '$in': handleArray
  });

/**
 * Casts contents for queries.
 *
 * @param {String} $conditional
 * @param {any} val
 * @api private
 */

SchemaBoolean.prototype.castForQuery = function($conditional, val) {
  var handler;
  if (2 === arguments.length) {
    handler = SchemaBoolean.$conditionalHandlers[$conditional];

    if (handler) {
      return handler.call(this, val);
    }

    return this.cast(val);
  }

  return this.cast($conditional);
};

/*!
 * Module exports.
 */

module.exports = SchemaBoolean;