/**
 * Copyright 2016-2017, 2020 Optimizely
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { sprintf } from '@optimizely/js-sdk-utils';
import { validate as jsonSchemaValidator } from 'json-schema';

import { ERROR_MESSAGES } from '../enums';
import schema from '../../core/project_config/project_config_schema';

const MODULE_NAME = 'JSON_SCHEMA_VALIDATOR';

/**
 * Validate the given json object against the specified schema
 * @param  {unknown} jsonObject The object to validate against the schema
 * @return {boolean}            true if the given object is valid
 */
export function validate(jsonObject: unknown): boolean {
  if (typeof jsonObject !== 'object' || jsonObject === null) {
    throw new Error(sprintf(ERROR_MESSAGES.NO_JSON_PROVIDED, MODULE_NAME));
  }

  const result = jsonSchemaValidator(jsonObject, schema);
  if (result.valid) {
    return true;
  } else {
    if (Array.isArray(result.errors)) {
      throw new Error(
        sprintf(ERROR_MESSAGES.INVALID_DATAFILE, MODULE_NAME, result.errors[0].property, result.errors[0].message)
      );
    }
    throw new Error(sprintf(ERROR_MESSAGES.INVALID_JSON, MODULE_NAME));
  }
}