"use strict";

const moduleAPI = require("./module-api");
const typeRules = require("./type-rules");

/* FIXME: Disallow usage of registry.type-style references from one registry in types of another? Or perhaps embed the registry in the reference, instead of passing it through functions by means of scope? */

module.exports = function createRegistry() {
	return Object.assign({}, moduleAPI, {
		_types: new Map(),
		_traits: new Map(),
		_getType: function (name) {
			if (this._types.has(name)) {
				return this._types.get(name);
			} else {
				throw new Error(`No type named ${name} was found in the registry`);
			}
		},
		_getTrait: function (name) {
			if (this._traits.has(name)) {
				return this._traits.get(name);
			} else {
				throw new Error(`No trait named ${name} was found in the registry`);
			}
		},
		createType: function (name, schema, options = {}) {
			if (!this._types.has(name)) {
				let type = moduleAPI.createType(name, schema, options);
				this._types.set(name, type);
				return type;
			} else {
				throw new Error(`A type named ${name} already exists in this registry`);
			}
		},
		createTrait: function (name, schema, options = {}) {
			if (!this._traits.has(name)) {
				let trait = moduleAPI.createTrait(name, schema, options);
				this._traits.set(name, trait);
				return trait;
			} else {
				throw new Error(`A trait named ${name} already exists in this registry`);
			}
		},
		type: function (typeName) {
			return typeRules._createTypeRule({
				_isCustomRegistryType: true,
				_name: typeName,
				_registry: this
			});
		},
		trait: function (traitName) {
			return typeRules._createTypeRule({
				_isRegistryTrait: true,
				_name: traitName,
				_registry: this
			});
		},
		createRegistry: undefined
	});
};