import { GrafanaPlugin, PanelPluginMeta, PluginType } from '@grafana/data';
import { getPluginSettings } from './pluginSettings';
import { importAppPlugin, importDataSourcePlugin } from './plugin_loader';
import { importPanelPluginFromMeta } from './importPanelPlugin';

export async function loadPlugin(pluginId: string): Promise<GrafanaPlugin> {
  const info = await getPluginSettings(pluginId);
  let result: GrafanaPlugin | undefined;

  if (info.type === PluginType.app) {
    result = await importAppPlugin(info);
  }
  if (info.type === PluginType.datasource) {
    result = await importDataSourcePlugin(info);
  }
  if (info.type === PluginType.panel) {
    const panelPlugin = await importPanelPluginFromMeta(info as PanelPluginMeta);
    result = panelPlugin as unknown as GrafanaPlugin;
  }
  if (info.type === PluginType.renderer) {
    result = { meta: info } as GrafanaPlugin;
  }

  if (!result) {
    throw new Error('Unknown Plugin type: ' + info.type);
  }

  return result;
}
