import { InteractionManager } from 'react-native';
import semver from 'semver';

import database from '../realm';
import log from '../../utils/log';
import reduxStore from '../createStore';

const getUpdatedSince = () => {
	const permissions = database.objects('permissions').sorted('_updatedAt', true)[0];
	return permissions && permissions._updatedAt.toISOString();
};

const create = (permissions) => {
	if (permissions && permissions.length) {
		permissions.forEach((permission) => {
			try {
				database.create('permissions', permission, true);
			} catch (e) {
				log('err_get_permissions_create', e);
			}
		});
	}
};

export default async function() {
	try {
		const serverVersion = reduxStore.getState().server.version;

		// if server version is lower than 0.73.0, fetches from old api
		if (semver.lt(serverVersion, '0.73.0')) {
			// RC 0.66.0
			const result = await this.sdk.get('permissions.list');
			if (!result.success) {
				return;
			}
			InteractionManager.runAfterInteractions(() => {
				database.write(() => {
					create(result.permissions);
				});
			});
		} else {
			const params = {};
			const updatedSince = getUpdatedSince();
			if (updatedSince) {
				params.updatedSince = updatedSince;
			}
			// RC 0.73.0
			const result = await this.sdk.get('permissions.listAll', params);

			if (!result.success) {
				return;
			}

			InteractionManager.runAfterInteractions(
				() => database.write(() => {
					create(result.update);

					if (result.delete && result.delete.length) {
						result.delete.forEach((p) => {
							try {
								const permission = database.objectForPrimaryKey('permissions', p._id);
								if (permission) {
									database.delete(permission);
								}
							} catch (e) {
								log('err_get_permissions_delete', e);
							}
						});
					}
				})
			);
		}
	} catch (e) {
		log('err_get_permissions', e);
	}
}