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

import { INotebookTracker } from '@jupyterlab/notebook';
import { ISettingRegistry } from '@jupyterlab/settingregistry';

import { installOpenCodeEverywhere } from './components/opencode_installer';
import { setOpenCodeRuntime } from './components/opencode_cell_footer';
import { requestAPI } from './request';
import { readOpenCodeSettings } from './types';
import { callOpenCodeProviders } from './api/opencode_client';

/**
 * Initialization data for the opencode_bridge extension.
 */
const plugin: JupyterFrontEndPlugin<void> = {
  id: 'opencode_bridge:plugin',
  description: 'A JupyterLab extension bridging the UI to OpenCode Serve.',
  autoStart: true,
  optional: [ISettingRegistry],
  requires: [INotebookTracker],
  activate: (
    app: JupyterFrontEnd,
    tracker: INotebookTracker,
    settingRegistry: ISettingRegistry | null
  ) => {
    console.log('JupyterLab extension opencode_bridge is activated!');

    // Install the per-cell footer factory on every notebook.
    installOpenCodeEverywhere(tracker);

    // Load settings + push into toolbar module.
    if (settingRegistry) {
      void settingRegistry
        .load(plugin.id)
        .then(settings => {
          const bridge = readOpenCodeSettings(settings.composite);
          setOpenCodeRuntime({
            settings: bridge,
            serverSettings: app.serviceManager.serverSettings
          });
          console.log('opencode_bridge settings loaded:', bridge);

          void callOpenCodeProviders(app.serviceManager.serverSettings)
            .then(data => {
              const lines: string[] = ['[opencode_bridge] Available OpenCode providers:'];
              for (const p of data.providers) {
                const models = p.models.map(m => m.id).join(', ');
                lines.push(`  - ${p.id}: ${models || '(no models)'}`);
              }
              // eslint-disable-next-line no-console
              console.log(lines.join('\n'));
            })
            .catch(reason => {
              // eslint-disable-next-line no-console
              console.warn(
                '[opencode_bridge] Could not fetch providers (is the opencode-bridge server extension enabled and opencode serve running?):',
                reason
              );
            });
        })
        .catch(reason => {
          console.error('Failed to load settings for opencode_bridge.', reason);
        });
    }

    requestAPI<unknown>('hello', app.serviceManager.serverSettings)
      .then(data => {
        console.log('hello endpoint:', data);
      })
      .catch(reason => {
        console.error(
          `The opencode_bridge server extension appears to be missing.\n${reason}`
        );
      });
  }
};

export default plugin;