#include "Webserv.hpp"

#define BUFSIZE 8192

void	Webserv::_request(Client *client)
{
	_read_request(client);
	if (g_last_signal)
		_handle_last_signal();	
}

void	Webserv::_read_request(Client *client)
{
	char	buf[BUFSIZE+1];
	ssize_t	ret;

	std::cerr << "recv()\n";
	ret = ::recv(client->fd, buf, BUFSIZE, 0);
	if (ret == -1)
	{
		std::perror("err recv()");
		std::cerr << "client ptr =" << client << "\n"; // DEBUG
		std::cerr << "client.fd =" << client->fd << "\n"; // DEBUG
		_close_client(client->fd);
		return ;
	}
	/*
	if (ret == BUFSIZE)
		// send error like "request too long" to client
	*/

	buf[ret] = '\0';
	client->raw_request.append(buf);
	_parse_request(client);

	_epoll_update(client->fd, EPOLLOUT, EPOLL_CTL_MOD, client);
}

// http headers :
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers
// https://www.ibm.com/docs/en/cics-ts/5.3?topic=protocol-http-requests
// https://www.tutorialspoint.com/http/http_requests.htm
void	Webserv::_parse_request(Client *client)
{
	std::string							sub;
	std::vector<std::string>			list;
	size_t								pos;

	pos = (client->raw_request).find("\r\n\r\n");
	sub = (client->raw_request).substr(0, pos);
	list = split(sub, '\n');
	// request_line
	_parse_request_line(client, *list.begin());
	list.erase(list.begin());
	// headers
	_parse_request_headers(client, list);
	// message-body
	client->request.insert( std::pair<std::string, std::string>("Body-Message", &client->raw_request[pos + 4]) );

	// TMP DEBUG
//	std::map<std::string, std::string>::iterator	itm;
//	std::map<std::string, std::string>::iterator	itm_end;
//	std::cout << "\n====== REQUEST HEADERS\n";
//	for (itm = client->request.begin(), itm_end = client->request.end(); itm != itm_end; itm++)
//		std::cout << "[" << itm->first << "] [" << itm->second << "]\n";
//	std::cout << "\n====== END\n";
}

void	Webserv::_parse_request_line(Client *client, std::string rline)
{
	std::vector<std::string>	sline;
	std::string					tmp;

	sline = split(rline, ' ');
	if (sline.size() != 3)
	{
		std::cerr << "err _parse_request_line(): ";
		throw std::runtime_error("bad request-line header");
	}
	// method
	tmp = ::trim(sline[0], ' ');
	tmp = ::trim(tmp, '\r');
	client->request.insert( std::pair<std::string, std::string>("Method", tmp) );
	// TODO uri in request_line :
	// https://www.rfc-editor.org/rfc/rfc7230#section-5.3
	// https://stackoverflow.com/questions/40311306/when-is-absoluteuri-used-from-the-http-request-specs
	tmp = ::trim(sline[1], ' ');
	tmp = ::trim(tmp, '\r');
	client->request.insert( std::pair<std::string, std::string>("Request-URI", tmp) );
	// http version
	tmp = ::trim(sline[2], ' ');
	tmp = ::trim(tmp, '\r');
	client->request.insert( std::pair<std::string, std::string>("HTTP-Version", tmp) );
}

void	Webserv::_parse_request_headers
	( Client *client
	, std::vector<std::string> list)
{
	std::string							key;
	std::string							val;
	std::vector<std::string>::iterator	it;
	size_t								pos;

	for (it = list.begin(); it != list.end(); it++)
	{
		pos = (*it).find(':');
		key = (*it).substr( 0, pos );
		key = ::trim(key, ' ');
		key = ::trim(key, '\r');
		val = (*it).substr( pos + 1 );
		val = ::trim(val, ' ');
		val = ::trim(val, '\r');
		client->request.insert( std::pair<std::string, std::string>(key, val) );
	}
}