/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import { IJSONSchema } from '../../../../vs/base/common/jsonSchema';
import * as platform from '../../../../vs/platform/registry/common/platform';
import { Emitter } from '../../../../vs/base/common/event';

export const Extensions = {
  JSONContribution: 'base.contributions.json',
};

export interface IJSONContributionRegistry {
  /**
   * Register a schema to the registry.
   */
  registerSchema(uri: string, unresolvedSchemaContent: IJSONSchema): void;

  /**
   * Notifies all listeners that the content of the given schema has changed.
   * @param uri The id of the schema
   */
  notifySchemaChanged(uri: string): void;
}

function normalizeId(id: string) {
  if (id.length > 0 && id.charAt(id.length - 1) === '#') {
    return id.substring(0, id.length - 1);
  }
  return id;
}

class JSONContributionRegistry implements IJSONContributionRegistry {
  private schemasById: { [id: string]: IJSONSchema };

  private readonly _onDidChangeSchema = new Emitter<string>();

  constructor() {
    this.schemasById = {};
  }

  public registerSchema(
    uri: string,
    unresolvedSchemaContent: IJSONSchema
  ): void {
    this.schemasById[normalizeId(uri)] = unresolvedSchemaContent;
    this._onDidChangeSchema.fire(uri);
  }

  public notifySchemaChanged(uri: string): void {
    this._onDidChangeSchema.fire(uri);
  }
}

const jsonContributionRegistry = new JSONContributionRegistry();
platform.Registry.add(Extensions.JSONContribution, jsonContributionRegistry);