#pragma once

#include <filesystem>
#include <optional>
#include <string>
#include <vector>

#include "breeze/Version.hpp"

/// The CLI managing itself: which versions of it are installed, which one is picked, and running
/// the picked one. Versions live in <breeze home>/cli/<version>/; `cli/current` names the picked
/// one, and <breeze home>/bin/breeze is the copy to put on PATH. Whatever `breeze` the shell finds
/// hands the command to the picked version, so installing or picking never means changing PATH
/// again.
namespace breeze::self
{

	/// The version of this program.
	std::string version();

	/// Installed versions, oldest first.
	std::vector<Version> installed();

	/// The version `cli pick` chose, if any.
	std::optional<Version> picked();

	/// Installs a version: this very program if that is its version, else a release of the
	/// configured CLI source. The first version installed is picked.
	void install(const std::string& version);

	void pick(const std::string& version);

	/// Removes a version; un-picks it if it was the picked one.
	void uninstall(const std::string& version);

	/// Prints the installed versions, marking the picked one and the running one.
	void list();

	/// If another version is picked, installed and runnable, runs it with `args` and does not
	/// return. `cli ...` commands always run in the version that was started.
	void forwardToPicked(const std::vector<std::string>& args);

}