#pragma once

#include "Utils/Sigslot.hpp"
#include "Utils/fwd.hpp"

#include <cstddef>
#include <optional>
#include <span>
#include <string>
#include <string_view>
#include <variant>
#include <vector>

class I18n {
public:
	static void Init();
	static void Shutdown();

	static Signal<> OnReload;
	static void ReloadLocales();

	static std::string_view GetLanguage();
	static bool SetLanguage(std::string_view lang);

	static std::optional<std::string_view> Lookup(std::string_view key);
	static std::string_view LookupUnwrap(std::string_view key);
	static std::string_view LookupLanguage(std::string_view lang);
};

struct StringArgument {
	std::string Value;
};

struct IntArgument {
	int Value;
};

struct FloatArgument {
	double Value;
};

class BasicTranslation {
private:
	const char* mContent;

public:
	BasicTranslation(std::string_view key);
	const char* Get() const;
};

class FormattedTranslation {
public:
	using Element = std::variant<std::string, int>;
	using Argument = std::string;

private:
	std::vector<Element> mParsedElements;
	size_t mNumArguments;
	size_t mMinimumResultLen;

public:
	FormattedTranslation(std::string_view key);
	std::string Format(std::span<Argument> args);
};

class NumericTranslation {
public:
	// TODO
};