/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { JsonParseMode, experimental, parseJson } from '@angular-devkit/core';
import { SchematicsException, Tree } from '@angular-devkit/schematics';


export type WorkspaceSchema = experimental.workspace.WorkspaceSchema;

export function getWorkspacePath(host: Tree): string {
  const possibleFiles = [ '/angular.json', '/.angular.json' ];
  const path = possibleFiles.filter(path => host.exists(path))[0];

  return path;
}

export function getWorkspace(host: Tree): WorkspaceSchema {
  const path = getWorkspacePath(host);
  const configBuffer = host.read(path);
  if (configBuffer === null) {
    throw new SchematicsException(`Could not find (${path})`);
  }
  const content = configBuffer.toString();

  return parseJson(content, JsonParseMode.Loose) as {} as WorkspaceSchema;
}