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";

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

export const deploy = async ({ host, commitHash }: DeployInstance) => {
	const service = config.services[host];
	const { user, repo, branch, port } = indexedConfig[hash(service)];

	const deploymentId = new Date().toISOString();

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

	// Fetch
	$.cwd(serviceDir);
	const url = `http://deployer:${config.token}@${config.giteaUrl}/${user}/${repo}`;
	await $`mkdir -p src`;
	await $`mkdir -p logs`;
	await $`git clone -b ${branch} ${url} ./src`.nothrow();

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

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

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

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