/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   main.cpp                                           :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: aortigos <aortigos@student.42malaga.com    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/09/06 14:44:18 by aortigos          #+#    #+#             */
/*   Updated: 2025/09/29 07:24:35 by aortigos         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include <iostream>
#include <fstream>

void	replaceAndWrite(std::ifstream &infile, std::ofstream &outfile,
							const std::string &s1, const std::string &s2)
{
	std::string	line;

	line = "";
	while (std::getline(infile, line)) {
		size_t	pos = 0;
		while ((pos = line.find(s1, pos)) != std::string::npos)
		{
			line.erase(pos, s1.length());
			line.insert(pos, s2);
			pos += s2.length();
		}
		outfile << line << std::endl;
	}	
}

int	main(int argc, char **argv)
{
	std::string	filename;
	std::string	s1;
	std::string	s2;
	std::string	line;

	if (argc != 4)
	{
		std::cout << "Uso: ./sed <filename> <s1> <s2>" << std::endl;
		return (1);
	}
	filename = argv[1];
	s1 = argv[2];
	s2 = argv[3];
	line = "";

	// Comprobamos que s1 no sea un string vacío
	if (s1.empty()) {
		std::cout << "s1 no puede estar vacío" << std::endl;
		return (1);
	}

	// Intentamos abrir el input
	std::ifstream infile(filename.c_str(), std::ifstream::in);
	if (!infile.is_open())
	{
		std::cout << "Ha ocurrido un error en el infile" << std::endl;
		return (1);
	}

	// Intentamos abrir el output
	std::ofstream outfile((filename + ".replace").c_str());
	if(!outfile.is_open())
	{
		std::cout << "Hubo un error en el outfile" << std::endl;
		return (1);
	}

	// Ejecutamos el bucle para reemplazar
	replaceAndWrite(infile, outfile, s1, s2);

	// Cerramos los archivos
	infile.close();
	outfile.close();

	return (0);
}