/*
    This file is part of libcapwap.

    libcapwap is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    libcapwap is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Foobar.  If not, see <http://www.gnu.org/licenses/>.

*/






/**
 * @file Debugging Functions
 * @brief Various debug functions.
 */
#include <stdarg.h>

#include "capwap.h"
#include "dbg.h"
#include "sock.h"

#include "log.h"
#include "strlist.h"
#include "format.h"
#include "capwap.h"
#include "capwap_cisco.h"
#include "lwapp_cisco.h"
#include "cw.h"
#include "message_set.h"



/**
 *@addtogroup DBG
 *@{
 */

 /*
  * @defgroup DebugFunctions Debug Functions
  * @{
  */



void (*cw_dbg_cb) (int level, const char *format, ...) = CW_LOG_DEFAULT_LOG;
void (*cw_dbg_vcb) (int level, const char *fromat, va_list args) = CW_LOG_DEFAULT_VLOG;



uint32_t cw_dbg_opt_display = 0;

/**
 * Current debug level
 */
uint32_t cw_dbg_opt_level = 0;


#define DBG_CLR_MAGENTA "\x1b[35m"
#define DBG_CLR_MAGENTA_L "\x1b[95m"

#define DBG_CLR_MAGENTA_B "\x1b[1;35m"
#define DBG_CLR_MAGENTA_F "\x1b[2;35m"
#define DBG_CLR_MAGENTA_I "\x1b[3;35m"

#define DBG_CLR_BLUE	"\x1b[34m"
#define DBG_CLR_BLUE_B	"\x1b[1;34m"
#define DBG_CLR_BLUE_F	"\x1b[2;34m"
#define DBG_CLR_BLUE_I	"\x1b[3;34m"

#define DBG_CLR_YELLO	"\x1b[33m"
#define DBG_CLR_YELLO_I "\x1b[3;33m"

#define DBG_CLR_CYAN	"\x1b[36m"


#define DBG_CLR_RED_I	"\x1b[3;31m"


static struct cw_strlist_elem color_on[] = {
	{DBG_PKT_IN, DBG_CLR_YELLO},
	{DBG_PKT_OUT, DBG_CLR_YELLO_I},

	{DBG_MSG_IN, DBG_CLR_BLUE},
	{DBG_MSG_OUT, DBG_CLR_BLUE_I},

	{DBG_ELEM, "\x1b[39m"},
	{DBG_MSG_ERR, "\x1b[31m"},
	{DBG_PKT_ERR, "\x1b[31m"},
	{DBG_ELEM_ERR, "\x1b[31m"},
	{DBG_SUBELEM, "\x1b[30m"},
	{DBG_DTLS, DBG_CLR_MAGENTA_B},
	{DBG_DTLS_DETAIL, DBG_CLR_MAGENTA},
	{DBG_DTLS_BIO, DBG_CLR_MAGENTA_L},


	{DBG_RFC, "\x1b[31m"},
	{DBG_X, "\x1b[31m"},
	{DBG_WARN, DBG_CLR_CYAN},
	{DBG_MOD, "\x1b[91m"},
	{CW_STR_STOP, ""}
};

static struct cw_strlist_elem color_ontext[] = {

	{DBG_ELEM_DMP, "\x1b[30m"},
	{CW_STR_STOP, ""}
};


static struct cw_strlist_elem color_off[] = {

	{CW_STR_STOP, "\x1b[22;39m\x1b[23m"}
};

static struct cw_strlist_elem prefix[] = {
	{DBG_INFO, " Info -"},
	{DBG_PKT_IN, " Pkt IN -"},
	{DBG_PKT_OUT, " Pkt Out -"},
	{DBG_MSG_IN, " Msg IN -"},
	{DBG_MSG_OUT, " Msg Out -"},

	{DBG_ELEM, " Msg Element -"},
	{DBG_MSG_ERR, " Msg Error -"},
	{DBG_PKT_ERR, " Pkt Error -"},
	{DBG_ELEM_ERR, " Elem Error -"},
	{DBG_RFC, " RFC -"},
	{DBG_SUBELEM, " Sub-Element - "},
	{DBG_DTLS, " DTLS - "},
	{DBG_DTLS_DETAIL, " DTLS - "},
	{DBG_WARN, " Warning - "},
	{DBG_MOD, " Mod - "},
	{DBG_X, "XXXXX - "},

	{CW_STR_STOP, ""}
};




static const char *get_dbg_color_on(int level)
{
	if (!(cw_dbg_opt_display & DBG_DISP_COLORS))
		return "";
	return cw_strlist_get_str(color_on, level);
}

static const char *get_dbg_color_off(int level)
{
	if (!(cw_dbg_opt_display & DBG_DISP_COLORS))
		return "";
	return cw_strlist_get_str(color_off, level);
}

static const char *get_dbg_prefix(int level)
{
	return cw_strlist_get_str(prefix, level);

}

static const char *get_dbg_color_ontext(int level)
{
	if (!(cw_dbg_opt_display & DBG_DISP_COLORS))
		return "";
	return cw_strlist_get_str(color_ontext, level);

}









/**
 * Put a list of missing mandatory message elements to debug output
 */
void cw_dbg_missing_mand(int level, struct conn *conn, cw_action_in_t ** ml, int n,
			 cw_action_in_t * a)
{
//      if (!cw_dbg_is_level(DBG_MSG_ERR) || n == 0)
//              return;

	if (!cw_dbg_is_level(level) || n == 0)
		return;

	char buffer[2000];
	char *p = buffer;
	int i;
	char *delim = "";
	// TODO XXXX
	for (i = 0; i < n; i++) {
/*		p += sprintf(p, "%s", delim);
		delim = ", ";
		p += sprintf(p, "%s", cw_strelemp(conn->actions, ml[i]->elem_id));
*/
	}
	cw_dbg(level, "Missing mandatory elements: [%s]", buffer);
}

/**
 * Format a Packet Header
 */
int cw_format_pkt_hdr(char *dst, int level, struct conn *conn, uint8_t * packet, int len,
		      struct sockaddr *from)
{
	char *s = dst;
	switch (level) {
		case DBG_PKT_IN:
			if (cw_get_hdr_flag_f(packet)) {
				s += sprintf(s, "Fragment from %s",
					     sock_addr2str_p(from));
			} else {
				s += sprintf(s, "From %s", sock_addr2str_p(from));
			}
			break;
		case DBG_PKT_OUT:
			if (cw_get_hdr_flag_f(packet)) {
				s += sprintf(s, "Fragment to %s", sock_addr2str(from));
			} else {
				s += sprintf(s, "To %s", sock_addr2str(from));
			}
			break;
	}
	s += sprintf(s, " l=%d: ", len);

	int preamble = cw_get_hdr_preamble(packet);
	if (preamble == 01) {
		s += sprintf(s, " (encrypted)");
		return s - dst;
	}

	if (len < 4)
		goto abort;

/*		
	if (cw_get_hdr_flag_f(packet)){
		s+=sprintf(s," (fragmented)");
	}
*/
	int hlen = cw_get_hdr_hlen(packet);
	int rid = cw_get_hdr_rid(packet);
	int wbid = cw_get_hdr_wbid(packet);
	s += sprintf(s, " H:%d R:%02d W:%02d", hlen, rid, wbid);


	s += sprintf(s, " Flgs:");
	s += format_hdr_flags(s, packet);

	if (len < 8)
		goto abort;
	int frag_id = cw_get_hdr_fragid(packet);
	int frag_offs = cw_get_hdr_fragoffset(packet);
	s += sprintf(s, " Frag/Offs:%d/%d", frag_id, frag_offs);


	if (cw_get_hdr_flag_m(packet)) {
		/* rmac is present, print the rmac */
		int rmac_len = cw_get_hdr_rmac_len(packet);
		int plen = rmac_len;
		if (rmac_len + 8 > len)
			plen = len - 8;
		if (rmac_len > 10)
			plen = 10;

		s += sprintf(s, " R-MAC:");
		s += format_mac(s, cw_get_hdr_rmac_data(packet), plen);
		if (rmac_len > 10) {
			s += sprintf(s, " ... (len=%d)", rmac_len);
		}
	}

	if (cw_get_hdr_flag_w(packet)) {
		/* print wireless specific info */
		int ws_len = cw_get_hdr_ws_len(packet);
		int plen = ws_len > 20 ? 20 : ws_len;
		s += sprintf(s, " WS:");
		s += format_hexu(s, cw_get_hdr_ws_data(packet), plen);
		if (ws_len > 20) {
			s += sprintf(s, " ... (len=%d)", ws_len);
		}
	}



	return s - dst;



      abort:
	s += sprintf(s, " Incomplete...");
	return s - dst;

}

/**
 * Create an ASCII hex dump of binary data
 * 
 * @param data data to dump
 * @param len number of bytes to dump (size of data)
 * @return a character string with the created data ASCII dump (must be released with free)
 */
char *cw_dbg_mkdmp_c(const uint8_t * data, int len, int invlen)
{

	int maxtlen = 2048;
	int i;
	int rowlen = CW_LOG_DUMP_ROW_LEN;
	int rows = len / rowlen;
	int tlen = 0;

	int md;
	if (cw_dbg_opt_display & DBG_DISP_ASC_DMP)
		md = 2;
	else
		md = 1;



	char *dst = malloc(2 * (md * (len * 3 + (rows * 2) + 8 + maxtlen)));
	if (!dst)
		return NULL;

	if (len % CW_LOG_DUMP_ROW_LEN)
		rows++;


	char *pdst = dst + tlen;
	sprintf(pdst, "\n\t");
	pdst += 2;

	char asc_buffer[128];
	char *ascdst = asc_buffer;

//      if (invlen) {
//              pdst+=sprintf(pdst,"\x1b[7m");
//      }

	for (i = 0; i < len; i++) {
		char *sp = " ";
		if (i == invlen - 1)
			sp = "|";
//              if (i==invlen){
//                      pdst+=sprintf(pdst,"\x1b[27m");
//              }

		pdst += sprintf(pdst, "%02X%s", data[i] & 0xff, sp);
		if (cw_dbg_opt_display & DBG_DISP_ASC_DMP) {
			int c = data[i] & 0xff;
			if (c < 0x20 || c > 0x7f)
				c = '.';
			*ascdst = c;
			ascdst++;
		}
//              pdst += 3;
		if ((i + 1) % rowlen == 0) {
			int l;
			if (cw_dbg_opt_display & DBG_DISP_ASC_DMP) {
				*ascdst = 0;
				l = sprintf(pdst, " | %s\n\t", asc_buffer);
				ascdst = asc_buffer;

			} else {
				l = sprintf(pdst, "\n\t");
			}
			pdst += l;
		}

	}

	if (cw_dbg_opt_display & DBG_DISP_ASC_DMP) {
		*ascdst = 0;
		if (strlen(asc_buffer))
			pdst += sprintf(pdst, " | %s", asc_buffer);

	}

	return dst;
}




char *cw_dbg_mkdmp(const uint8_t * data, int len)
{
	return cw_dbg_mkdmp_c(data, len, 0);
}














/**
 * Display a packet on for debugger
 */
void cw_dbg_pkt(int level, struct conn *conn, uint8_t * packet, int len,
		struct sockaddr *from)
{
	if (!cw_dbg_is_level(level))
		return;

	char buf[1024];
	cw_format_pkt_hdr(buf, level, conn, packet, len, from);

	int hlen = cw_get_hdr_msg_offset(packet);

	if (cw_dbg_is_level(DBG_PKT_DMP)) {
		char *dmp = cw_dbg_mkdmp_c(packet, len, hlen);
		cw_dbg(level, "%s%s", buf, dmp);
		free(dmp);
	} else
		cw_dbg(level, "%s", buf);
}

void cw_dbg_pkt_nc(int level, struct netconn *nc, uint8_t * packet, int len,
		   struct sockaddr *from)
{
	if (!cw_dbg_is_level(level))
		return;

	char buf[1024];
	cw_format_pkt_hdr(buf, level, NULL, packet, len, from);

	int hlen = cw_get_hdr_msg_offset(packet);

	if (cw_dbg_is_level(DBG_PKT_DMP)) {
		char *dmp = cw_dbg_mkdmp_c(packet, len, hlen);
		cw_dbg(level, "%s%s", buf, dmp);
		free(dmp);
	} else
		cw_dbg(level, "%s", buf);
}






void cw_dbg_dmp_(int level, const char *file, int line,
		 const uint8_t * data, int len, const char *format, ...)
{
	if (!cw_dbg_is_level(level))
		return;


	char *dmp = cw_dbg_mkdmp(data, len);
	cw_dbg(level, "%s%s", format, dmp);
	free(dmp);


}




void cw_dbg_msg(int level, struct conn *conn, uint8_t * packet, int len,
		struct sockaddr *from)
{
	if (!cw_dbg_is_level(level))
		return;

	char buf[1024];
	char *s = buf;



	uint8_t *msgptr = cw_get_hdr_msg_ptr(packet);
//      int pplen = len - (msgptr-packet);

	int msg_id = cw_get_msg_id(msgptr);
	
	struct cw_MsgData search;
	search.type = msg_id;
	struct cw_MsgData * message;
	message = mavl_get(conn->msgset->messages,&search);
	
	char * msname;
	if (!message)
		msname="Unknown";
	else
		msname = message->name;
	
	s += sprintf(s, "%s Message (type=%d) ", msname  /*cw_strmsg(msg_id)*/, msg_id);
	if (level == DBG_MSG_IN)
		s += sprintf(s, "from %s ", sock_addr2str(from));
	else
		s += sprintf(s, "to %s ", sock_addr2str(from));

	s += sprintf(s, ", Seqnum: %d ElemLen: %d", cw_get_msg_seqnum(msgptr),
		     cw_get_msg_elems_len(msgptr));

//abort:
	cw_dbg(level, "%s", buf);
}

static int cw_format_vendor(char *dst, uint32_t vendor_id, int elem_id,
			    const uint8_t * elem_data)
{
	switch (vendor_id) {
		case CW_VENDOR_ID_CISCO:
		{
			if (elem_id != CW_CISCO_SPAM_VENDOR_SPECIFIC) {
				return sprintf(dst, "%d - %s", elem_id,
					       cw_cisco_id_to_str(elem_id));
			}


			/* dive into LWAPP vendor specific decoding */
			uint32_t lw_elem_id = lw_get_word(elem_data + 4 + 6);
			return sprintf(dst, "%d/LWAPP Vendor: %d - %s",
				       elem_id,
				       lw_elem_id, lw_cisco_id_to_str(lw_elem_id));



			break;
		}
		default:
		{
			return sprintf(dst, "%d", elem_id);

		}



	}

	return 0;
}




/**
 * print debug info for message elements
 */

void cw_dbg_elem_colored(int level, struct conn *conn, int msg, int msgelem,
			 const uint8_t * msgbuf, int len)
{
	if (!cw_dbg_is_level(level))
		return;

	const char *elemname;
	char vendorname[256];
	char vendor_details[265];
	*vendor_details = 0;
/// TODO XXXX

	if (msgelem == CAPWAP_ELEM_VENDOR_SPECIFIC_PAYLOAD) {
		uint32_t vendor_id = ntohl(*((uint32_t *) msgbuf));
		int type = ntohs(*((uint16_t *) (msgbuf + 4)));
		cw_format_vendor(vendor_details, vendor_id, type, msgbuf);
/*		sprintf(vendorname, "%s/%s/%s",
			cw_strelemp(conn->actions, msgelem),
			(char *) cw_strvendor(vendor_id), vendor_details);
*/
		elemname = vendorname;

	} else {
//		elemname = cw_strelemp(conn->actions, msgelem);
		elemname=0;
	}


	if (!cw_dbg_is_level(DBG_ELEM_DMP)) {
		cw_dbg(DBG_ELEM, "%d (%s), len=%d", msgelem, elemname, len);
	} else {
		char *dmp = cw_dbg_mkdmp(msgbuf, len);

		cw_dbg(DBG_ELEM, "%d (%s), len=%d%s%s",
		       msgelem, elemname, len, get_dbg_color_ontext(DBG_ELEM_DMP), dmp);

		free(dmp);
	}
}


void cw_dbg_colored(int level, const char *file, int line, const char *format, ...)
{

	if (!(cw_dbg_is_level(level)))
		return;

	char fbuf[1024];

	sprintf(fbuf, "DBG:%s%s %s%s%s",
		get_dbg_color_on(level),
		get_dbg_prefix(level),
		get_dbg_color_ontext(level), format, get_dbg_color_off(level)
	    );


	va_list args;
	va_start(args, format);
	cw_log_vcb(level, fbuf, args);
	va_end(args);

}

//int cw_is_utf8(unsigned char *str, size_t len);


int cw_format_item(char *dst, mbag_item_t * item)
{
	*dst = 0;
	if (item->type == MBAG_BSTR16) {
		strncpy(dst, (char *) bstr16_data(item->data), bstr16_len(item->data));
		*(dst + bstr16_len(item->data)) = 0;
		return bstr16_len(item->data);


	}
	return 0;
}

static int cw_format_version(char *s, bstrv_t ver, char *def)
{
	if (!ver)
		return sprintf(s, "%s", def);


	uint8_t *version = bstrv_data(ver);
	int len = bstrv_len(ver);



	int rs = 0;
	int i;


	if (format_is_utf8(version, len)) {
		if (len != 0)
			rs += sprintf(s + rs, "%.*s", len, version);
		else
			rs += sprintf(s + rs, "''");
	} else {
		for (i = 0; i < len && i < 20; i++) {
			rs += sprintf(s + rs, "%02X", version[i]);
		}

		int dot = 0;

		rs += sprintf(s + rs, " (");
		for (i = 0; i < len && i < 20; i++) {
			if (dot)
				rs += sprintf(s + rs, ".");
			dot = 1;
			rs += sprintf(s + rs, "%d", version[i]);
		}
		rs += sprintf(s + rs, ")");
	}

	uint32_t vendor = bstrv_get_vendor_id(ver);
	rs += sprintf(s + rs, ", Vendor Id: %d, %s", vendor, cw_strvendor(vendor));
	return rs;
}



void cw_dbg_version_subelem(int level, const char *context, int subtype, bstrv_t vstr)
{
	if (!cw_dbg_is_level(level))
		return;
	if (!vstr)
		return;
	char v[256];
	cw_format_version(v, vstr, "");
	cw_dbg(level, "%s: SubType %d, %s", context, subtype, v);

}


/*
void dbg_istore_dmp(mbag_t s)
{
	DEFINE_AVLITER(it,s);
	avliter_foreach(&it) {

		mbag_item_t *i = avliter_get(&it);

		char buffer[1000];

		struct cw_str * strings = cw_item_strings;
		
		const char * in = cw_strlist_get_str(strings,i->id);
		
		cw_format_item(buffer,i);
		printf("Item ID %d-%s: %s\n",i->id,in,buffer);
				

	}


}
*/


/**@}*/


/**@}*/