//
// Apple Container for Nova.
//
// Entry point: wires up the sidebar, the extension's commands and the Docker
// language server, and tears them all down again on deactivate.
//

const { ContainerSidebar } = require("./Sidebar/ContainerSidebar");
const { Hostnames } = require("./Hostnames");
const { DockerLanguageClient } = require("./LanguageClients/DockerLanguageClient");
const { ContainerCLI } = require("./Interfaces/ContainerCLI");
const { Commands } = require("./Commands");
const notify = require("./Utilities/Notify");

let sidebar = null;
let languageClient = null;
let commands = null;
let hostnames = null;

exports.activate = async function () {
	commands = new Commands({
		sidebar: () => sidebar,
		restartLanguageServer: () => (languageClient ? languageClient.restart() : null)
	});

	if (!(await installed())) {
		notify.configFailure(
			"Apple Container was not found",
			"Install it from github.com/apple/container, or set the path to the container tool in the extension's preferences.",
			"apple-container-missing"
		);
	} else {
		sidebar = new ContainerSidebar();
		hostnames = new Hostnames({
			reload: () => (sidebar ? sidebar.reload() : null)
		});
	}

	languageClient = new DockerLanguageClient();
	await languageClient.start();
};

exports.deactivate = function () {
	if (sidebar) {
		sidebar.dispose();
		sidebar = null;
	}

	if (languageClient) {
		languageClient.dispose();
		languageClient = null;
	}

	if (hostnames) {
		hostnames.dispose();
		hostnames = null;
	}

	if (commands) {
		commands.dispose();
		commands = null;
	}
};

// The CLI is the one hard requirement: without it there is nothing to show.
async function installed() {
	try {
		await ContainerCLI.version();
		return true;
	} catch (error) {
		return false;
	}
}