#include "Webserv.hpp"


#define BUFSIZE 8192 // (8Ko)
#define STATUS_500 std::string("Status: 500" CRLF CRLF);
void	Webserv::_read_cgi_output(Client *client)
{
	char	buf[BUFSIZE];
	ssize_t	ret;
	std::cerr << "_read_cgi_output()" << "\n";
	std::cerr << "cgi_pid = " << client->cgi_pid << "\n";
	std::cerr << "client fd = " << client->get_cl_fd() << "\n";
	std::cerr << "cgi fd = " << client->cgi_pipe_r_from_child << "\n";

	ret = ::read(client->cgi_pipe_r_from_child, buf, BUFSIZE);
	std::cerr << "cgi read ret = " << ret << "\n";
	if (ret == -1)
	{
		std::perror("err read(cgi_fd)");
		client->cgi_output = STATUS_500;
	}
	else if (ret == 0)
		std::cerr << "Madame s'il vous plait, du Ketchup pour mon hamburger" << " (AKA:ret=0)" << "\n";
	else
	{
		std::cerr << "NORMAL BEHAVIOR I THINK!\n"; // debug
		client->cgi_output.append(buf, ret);
	}
}

void	Webserv::_handle_epollerr_cgi_output(uint32_t events, Client *client)
{
	(void)events;
	std::cerr << "cgi EPOLLERR" << "\n";
	std::cerr << "cgi_pid = " << client->cgi_pid << "\n";
	std::cerr << "client fd = " << client->get_cl_fd() << "\n";
	std::cerr << "cgi fd = " << client->cgi_pipe_r_from_child << "\n";

	client->cgi_output = STATUS_500;

	// Common with EPOLLHUP
	pid_t	wait_ret;
	wait_ret = ::waitpid(client->cgi_pid, NULL, WNOHANG);
	std::cerr << "cgi EPOLLERR waitpid ret = " << wait_ret << "\n";
	if (wait_ret == client->cgi_pid)
	{
		if (client->cgi_pipe_r_from_child)
		{
			if (::close(client->cgi_pipe_r_from_child) == -1)
				std::perror("err close()");
		}
		client->cgi_pipe_r_from_child = 0;
		_epoll_update(client->get_cl_fd(), EPOLLOUT, EPOLL_CTL_ADD);
		client->cgi_state = CGI_OUTPUT_READY;
	}

}

void	Webserv::_handle_epollhup_cgi_output(uint32_t events, Client *client)
{
	(void)events;
	(void)client;

/* 	std::cerr << "cgi EPOLLHUP" << "\n";
	std::cerr << "cgi_pid = " << client->cgi_pid << "\n";
	std::cerr << "client fd = " << client->get_cl_fd() << "\n";
	std::cerr << "cgi fd = " << client->cgi_pipe_r_from_child << "\n"; */

	// Common with EPOLLERR
	pid_t	wait_ret;
	wait_ret = ::waitpid(client->cgi_pid, NULL, WNOHANG);
	// std::cerr << "cgi EPOLLHUP waitpid ret = " << wait_ret << "\n";
	if (wait_ret == client->cgi_pid)
	{
		if (client->cgi_pipe_r_from_child)
		{
			if (::close(client->cgi_pipe_r_from_child) == -1)
				std::perror("err close()");
		}
		client->cgi_pipe_r_from_child = 0;
		_epoll_update(client->get_cl_fd(), EPOLLOUT, EPOLL_CTL_ADD);
		client->cgi_state = CGI_OUTPUT_READY;
	}
}

void	Webserv::_cgi_input_ready(Client *client)
{
	client->cgi_state = CGI_READY_TO_EXEC;
	_epoll_update(client->cgi_pipe_w_to_child, 0, EPOLL_CTL_DEL);
	_epoll_update(client->get_cl_fd(), EPOLLOUT, EPOLL_CTL_ADD);
}

void	Webserv::_handle_epollerr_cgi_input(uint32_t events, Client *client)
{
	(void)events;

	client->cgi_output = STATUS_500;

	client->cgi_state = CGI_OUTPUT_READY;
	_close_client_cgi_pipes(client);
	_epoll_update(client->get_cl_fd(), EPOLLOUT, EPOLL_CTL_ADD);
}

Client	*Webserv::_find_cgi_output_fd(int fd)
{
	std::vector<Client>::iterator	it = _clients.begin();
	std::vector<Client>::iterator	it_end = _clients.end();
	while (it != it_end)
	{
		if (it->cgi_pipe_r_from_child == fd)
			return (&(*it));
		++it;
	}
	return (NULL);
}

Client	*Webserv::_find_cgi_input_fd(int fd)
{
	std::vector<Client>::iterator	it = _clients.begin();
	std::vector<Client>::iterator	it_end = _clients.end();
	while (it != it_end)
	{
		if (it->cgi_pipe_w_to_child == fd)
			return (&(*it));
		++it;
	}
	return (NULL);
}