import hash from "object-hash";
import { $ } from "bun";
import path from "path";
import { config, indexedConfig, isSelf } from "./config";
import fs from "fs";
import { rebuildCaddyfile } from "./caddy";
import { l$ } from "./utils";

type DeployInstance = {
	host: string;
	commitHash?: string;
};

export const deploy = async ({ host, commitHash }: DeployInstance) => {
	const deploymentId = new Date().toISOString();
	console.log(`=== ${deploymentId} ===`);
	console.log({ host, commitHash });

	const deployerDir = await l$`pwd`.text().then((t) => t.trim());
	console.log(deployerDir);

	const service = config.services[host];
	const { user, repo, branch, port } = indexedConfig[hash(service)];

	const serviceDir = path.join(config.directory, host);
	await l$`mkdir -p ${serviceDir}`;

	// Fetch
	$.cwd(serviceDir);
	const url = `http://deployer:${config.token}@${config.giteaUrl}/${user}/${repo}`;
	await l$`mkdir -p src`;
	await l$`mkdir -p logs`;
	await $`git clone -b ${branch} ${url} ./src`.nothrow(); // explicitly don't log token

	$.cwd(path.join(serviceDir, "src"));
	await l$`git fetch origin ${branch}`;
	commitHash && (await l$`git reset --hard origin/${branch}`);
	commitHash && (await l$`git checkout ${commitHash}`);

	// Build
	await l$`make build`;
	rebuildCaddyfile();

	// Register service
	const systemdServiceName = `deployer2-${host}.service`;
	await l$`cat ${path.join(
		deployerDir,
		"service.template"
	)} | envsubst > ${path.join(serviceDir, systemdServiceName)}`.env({
		host,
		port: port.toString(),
		repo,
		branch,
		commitHash,
		deploymentId,
		logsDir: path.join(serviceDir, "logs"),
		serviceDir,
		user: isSelf(service) ? "root" : "drm",
	});
	await l$`ln -sf ${serviceDir}/${systemdServiceName} ${config.systemServicesDir}/${systemdServiceName}`;

	// Start!
	await l$`systemctl daemon-reload`;
	await l$`systemctl restart ${systemdServiceName}`;
};