#include <stdlib.h>
#include <stdio.h>
#include <sys/socket.h>
#include "handlers.h"
#include "packet.h"
#include "netascii.h"

void *read_req_resp(void *args) {
	char fname[768];
	memset(fname, '\0', sizeof(fname));
	for (int i = 0; ((*(nbd_nbtpd_args *)args).path[i] != 0) && (i < 768); i++) {
		if (is_netascii_char((*(nbd_nbtpd_args *)args).path[i])) {
			fname[i] = (*(nbd_nbtpd_args *)args).path[i];
		} else {
			(*(nbd_nbtpd_args *)args).err = 1;
			return nbd_nbtpd_resp_error(args);
		}
	}
	char mode[32];
	memset(mode, '\0', sizeof(mode));
	for (int i = 0; ((*(nbd_nbtpd_args *)args).mode[i] != 0) && (i < 32); i++) {
		if (is_netascii_char((*(nbd_nbtpd_args *)args).mode[i])) {
			mode[i] = (*(nbd_nbtpd_args *)args).mode[i];
		} else {
			(*(nbd_nbtpd_args *)args).err = 4;
			return nbd_nbtpd_resp_error(args);
		}
	}
	FILE fp;
	switch (mode) {
		// This server responds only in octet mode, regardless of requested mode.
		case "netascii": case "octet":
			fp = fopen("./" fname, "r");
			if (fp == NULL) {
				(*(nbd_nbtpd_args *)args).err = 1;
				return nbd_nbtpd_resp_error(args);
			}
			break;
		// this server does not support mail mode.  This is still compliant
		// with RFC1350, ironically enough.
		case "mail": default:
			(*(nbd_nbtpd_args *)args).err = 4;
			return nbd_nbtpd_resp_error(args);
	}
	//TODO: make new socket and go into main loop
	free(args);
	return (void *)NULL;
}

void *write_req_resp(void *args) {
	char fname[768];
	memset(fname, '\0', sizeof(fname));
	for (int i = 0; ((*(nbd_nbtpd_args *)args).path[i] != 0) && (i < 768); i++) {
		if (is_netascii_char((*(nbd_nbtpd_args *)args).path[i])) {
			fname[i] = (*(nbd_nbtpd_args *)args).path[i];
		} else {
			(*(nbd_nbtpd_args *)args).err = 1;
			return nbd_nbtpd_resp_error(args);
		}
	}
	char mode[32];
	memset(mode, '\0', sizeof(mode));
	for (int i = 0; ((*(nbd_nbtpd_args *)args).mode[i] != 0) && (i < 32); i++) {
		if (is_netascii_char((*(nbd_nbtpd_args *)args).mode[i])) {
			mode[i] = (*(nbd_nbtpd_args *)args).mode[i];
		} else {
			(*(nbd_nbtpd_args *)args).err = 4;
			return nbd_nbtpd_resp_error(args);
		}
	}
	FILE fp;
	switch (mode) {
		// This server responds only in octet mode, regardless of requested mode.
		case "netascii": case "octet":
			fp = fopen("./" fname, "r");
			if (fp == NULL) {
				(*(nbd_nbtpd_args *)args).err = 1;
				return nbd_nbtpd_resp_error(args);
			}
			break;
		// this server does not support mail mode.  This is still compliant
		// with RFC1350, ironically enough.
		case "mail": default:
			(*(nbd_nbtpd_args *)args).err = 4;
			return nbd_nbtpd_resp_error(args);
	}
	//TODO: make new socket and go into main loop
	free(args);
	return (void *)NULL;
}

void *nbd_nbtpd_resp_error(void *args) {
	//TODO: open socket and scream error, then cleanup.
	free(args);
	return (void *)NULL;
}