'use strict';

var ruleModules = require('../dotjs')

, toHash = require('./util').toHash;

module.exports = function rules() {

var RULES = [
  { type: 'number',
    rules: [ { 'maximum': ['exclusiveMaximum'] },
             { 'minimum': ['exclusiveMinimum'] }, 'multipleOf', 'format'] },
  { type: 'string',
    rules: [ 'maxLength', 'minLength', 'pattern', 'format' ] },
  { type: 'array',
    rules: [ 'maxItems', 'minItems', 'items', 'contains', 'uniqueItems' ] },
  { type: 'object',
    rules: [ 'maxProperties', 'minProperties', 'required', 'dependencies', 'propertyNames',
             { 'properties': ['additionalProperties', 'patternProperties'] } ] },
  { rules: [ '$ref', 'const', 'enum', 'not', 'anyOf', 'oneOf', 'allOf', 'if' ] }
];

var ALL = [ 'type', '$comment' ];
var KEYWORDS = [
  '$schema', '$id', 'id', '$data', '$async', 'title',
  'description', 'default', 'definitions',
  'examples', 'readOnly', 'writeOnly',
  'contentMediaType', 'contentEncoding',
  'additionalItems', 'then', 'else'
];
var TYPES = [ 'number', 'integer', 'string', 'array', 'object', 'boolean', 'null' ];
RULES.all = toHash(ALL);
RULES.types = toHash(TYPES);

RULES.forEach(function (group) {
  group.rules = group.rules.map(function (keyword) {
    var implKeywords;
    if (typeof keyword == 'object') {
      var key = Object.keys(keyword)[0];
      implKeywords = keyword[key];
      keyword = key;
      implKeywords.forEach(function (k) {
        ALL.push(k);
        RULES.all[k] = true;
      });
    }
    ALL.push(keyword);
    var rule = RULES.all[keyword] = {
      keyword: keyword,
      code: ruleModules[keyword],
      implements: implKeywords
    };
    return rule;
  });

  RULES.all.$comment = {
    keyword: '$comment',
    code: ruleModules.$comment
  };

  if (group.type) RULES.types[group.type] = group;
});

RULES.keywords = toHash(ALL.concat(KEYWORDS));
RULES.custom = {};

return RULES;

};