import {
  JupyterFrontEnd,
  JupyterFrontEndPlugin
} from '@jupyterlab/application';
import { ISettingRegistry } from '@jupyterlab/settingregistry';

import { SecretsManager } from './manager';
import { ISecretsManager } from './token';
import { InMemoryConnector } from './connectors';
import { PageConfig } from '@jupyterlab/coreutils';

/**
 * A basic secret connector extension, that should be disabled to provide a new
 * connector.
 */
const inMemoryConnector: JupyterFrontEndPlugin<void> = {
  id: 'jupyter-secrets-manager:connector',
  description: 'A JupyterLab extension to manage secrets.',
  autoStart: true,
  requires: [ISecretsManager],
  activate: (app: JupyterFrontEnd, manager: ISecretsManager): void => {
    manager.setConnector(new InMemoryConnector());
  }
};

/**
 * The secret manager extension.
 */
const managerPlugin: JupyterFrontEndPlugin<ISecretsManager> = {
  id: 'jupyter-secrets-manager:manager',
  description: 'A JupyterLab extension to manage secrets.',
  autoStart: true,
  provides: ISecretsManager,
  optional: [ISettingRegistry],
  activate: (
    app: JupyterFrontEnd,
    settingRegistry: ISettingRegistry
  ): ISecretsManager => {
    // Check if the fields are hidden from page config.
    let showSecretFieldsConfig = true;
    if (PageConfig.getOption('secretsManager-showFields') === 'false') {
      showSecretFieldsConfig = false;
    }

    const manager = new SecretsManager({
      showSecretFields: showSecretFieldsConfig
    });

    settingRegistry
      .load(managerPlugin.id)
      .then(settings => {
        // If the fields are hidden from the manager, remove the setting.
        if (!showSecretFieldsConfig) {
          delete settings.schema.properties?.['ShowSecretFields'];
          return;
        }

        // Otherwise listen to it to update the field visibility.
        const updateFieldVisibility = () => {
          const showSecretField =
            settings.get('ShowSecretFields').composite ?? false;
          manager.secretFieldsVisibility = showSecretField as boolean;
        };

        settings.changed.connect(() => updateFieldVisibility());
        updateFieldVisibility();
      })
      .catch(reason => {
        console.error(
          `Failed to load settings for ${managerPlugin.id}`,
          reason
        );
      });

    console.debug('JupyterLab extension jupyter-secrets-manager is activated!');
    return manager;
  }
};

export * from './connectors';
export * from './manager';
export * from './token';
export default [inMemoryConnector, managerPlugin];