export function resolveInlineShellCommand({
	command,
	env,
	platform = process.platform,
}: {
	command: string;
	env: Record<string, string | undefined>;
	platform?: string;
}) {
	const shellOverride = String(env?.LOBSTER_SHELL ?? "").trim();
	const isWindows = platform === "win32";

	if (shellOverride) {
		return {
			command: shellOverride,
			argv: buildShellArgs({ shellCommand: shellOverride, command, isWindows }),
		};
	}

	if (isWindows) {
		const comspec = String(env?.ComSpec ?? env?.COMSPEC ?? "cmd.exe").trim() || "cmd.exe";
		return {
			command: comspec,
			argv: ["/d", "/s", "/c", command],
		};
	}

	// Keep default behavior deterministic and POSIX-compatible across environments.
	const shell = "/bin/sh";
	return {
		command: shell,
		argv: ["-lc", command],
	};
}

function buildShellArgs({
	shellCommand,
	command,
	isWindows,
}: {
	shellCommand: string;
	command: string;
	isWindows: boolean;
}) {
	const lowered = shellCommand.toLowerCase();
	const looksLikeCmd = lowered.endsWith("cmd") || lowered.endsWith("cmd.exe");
	const looksLikePowerShell =
		lowered.endsWith("powershell") ||
		lowered.endsWith("powershell.exe") ||
		lowered.endsWith("pwsh") ||
		lowered.endsWith("pwsh.exe");

	if (looksLikePowerShell) {
		return ["-NoProfile", "-Command", command];
	}
	if (looksLikeCmd || isWindows) {
		return ["/d", "/s", "/c", command];
	}
	return ["-lc", command];
}