import is from '@sindresorhus/is';

import {PackageInfo} from './client/stackdriver/debug';
import {StatusMessage} from './client/stackdriver/status-message';

// TODO: Determine how to get this interface to satisfy both the code and the
// docs
//       In particular, the comments below state some of the properties are
//       required but the default properties in the code is {}
export interface DebuggeeProperties {
  project?: string;
  uniquifier?: string;
  description?: string;
  agentVersion: string;
  labels?: {
    [key: string]: string;
  };
  sourceContexts?: Array<{[key: string]: {}}>;
  statusMessage?: StatusMessage;
  packageInfo?: PackageInfo;
}

export class Debuggee {
  uniquifier?: string;
  description?: string;
  agentVersion?: string;
  sourceContexts?: Array<{[key: string]: {}}>;

  // Public to allow for testing
  project?: string;
  labels?: {
    [key: string]: string;
  };
  statusMessage?: StatusMessage;
  id!: string;
  // TODO: This doesn't seem to ever be set but is referenced in the
  //       debuglet.ts file.
  isDisabled?: boolean;
  isInactive?: boolean;

  /**
   * Creates a Debuggee service object.
   * @ref https://cloud.google.com/debugger/api/reference/rest/v2/Debuggee
   *
   * @param {object} properties - an object with properties to use for Debuggee
   *     initialization.
   * @param {object} properties.project - Google Cloud Project ID
   * @param {string} properties.uniquifier - Debuggee uniquifier within the
   *     project. Any string that identifies the application within the project
   *     can be used. Including environment and version or build IDs is
   *     recommended.
   * @param {string} properties.description - A user specified string identifying
   *     this debuggable instance.
   * @param {?string} properties.agentVersion - version ID of the agent. (default:
   *     the version of this module)
   * @param {?object} labels - a set of custom properties about the debuggee that
   *     are reported to the service.
   * @param {?array<object>} properties.sourceContexts
   * @param {?StatusMessage} properties.statusMessage - A error string to register
   *     this as an erroring debuggable instance. This is useful if we have a
   *     problem starting the debugger support, and want to report to the API so
   *     that the user has a way of noticing.
   *     TODO(ofrobots): has this been renamed to `status` in the API?
   */
  constructor(properties: DebuggeeProperties) {
    if (!(this instanceof Debuggee)) {
      return new Debuggee(properties);
    }

    properties = properties || {};

    if (!is.string(properties.project)) {
      throw new Error('properties.project must be a string');
    }
    if (!is.string(properties.uniquifier)) {
      throw new Error('properties.uniquifier must be a string');
    }
    if (!is.string(properties.description)) {
      throw new Error('properties.description must be a string');
    }

    this.project = properties.project;
    this.uniquifier = properties.uniquifier;
    this.description = properties.description;
    this.agentVersion = properties.agentVersion;
    if (properties.labels) {
      this.labels = properties.labels;
    }
    if (properties.sourceContexts) {
      this.sourceContexts = properties.sourceContexts;
    }
    if (properties.statusMessage) {
      this.statusMessage = properties.statusMessage;
    }
  }
}