// License: Modified MIT (NON-AI)
// See the LICENSE file in the root directory for license information.
// Copyright 2025 Timothy Prepscius

#pragma once

#include "../iterators/is_first.hpp"
#include "to_string.hpp"
#include <string>

namespace tjp::core {

template <typename V, typename T>
void join_(std::string &result, is_first &first, const V &delimiter, const T & sv)
{
	for (auto &s : sv)
	{
		if (!first.check())
			result += delimiter;
			
		result.insert(result.end(), s.begin(), s.end());
	}
}

template <typename V, typename U, typename T>
void join_(std::string &result, is_first &first, const V &delimiter, const U &u, const T & sv)
{
	for (auto &s_ : sv)
	{
		auto s = u(s_);
		if (!first.check())
			result += delimiter;
			
		result.insert(result.end(), s.begin(), s.end());
	}
}

template <typename V, typename ... T>
std::string join(const V &delimiter, T&& ... t)
{
	std::string result;
	is_first first;
	
	((join_(result, first, delimiter, t)),...) ;

	return result;
}

template <typename V, typename ... T>
std::string join_values(const V &delimiter, T&& ... t)
{
	std::string result;
	is_first first;
	
	auto u = [](auto &v) { return to_string(v); };
	((join_(result, first, delimiter, u, t)),...) ;

	return result;
}

template <typename V, typename U, typename ... T>
std::string join_with(const V &delimiter, U &&u, T&& ... t)
{
	std::string result;
	is_first first;
	
	((join_(result, first, delimiter, u, t)),...) ;

	return result;
}

} // namespace