/**
 *
 * Copyright (C) 2013-2015 Victor Seva (sipwise.com)
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * This file 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 2 of the License, or
 * (at your option) any later version
 *
 * This file 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */
#include <stdio.h>

#include "../../pvar.h"
#include "../../mem/shm_mem.h"
#include "../../xavp.h"
#include "../pv/pv_xavp.h"

#include "cfgt_json.h"

int _cfgt_get_array_avp_vals(struct sip_msg *msg,
		pv_param_t *param, srjson_doc_t *jdoc, srjson_t **jobj,
		str *item_name)
{
	struct usr_avp *avp;
	unsigned short name_type;
	int_str avp_name;
	int_str avp_value;
	struct search_state state;
	srjson_t *jobjt;
	memset(&state, 0, sizeof(struct search_state));

	if(pv_get_avp_name(msg, param, &avp_name, &name_type)!=0)
	{
		LM_ERR("invalid name\n");
		return -1;
	}
	*jobj = srjson_CreateArray(jdoc);
	if(*jobj==NULL)
	{
		LM_ERR("cannot create json object\n");
		return -1;
	}
	if ((avp=search_first_avp(name_type, avp_name, &avp_value, &state))==0)
	{
		goto ok;
	}
	do
	{
		if(avp->flags & AVP_VAL_STR)
		{
			jobjt = srjson_CreateStr(jdoc, avp_value.s.s, avp_value.s.len);
			if(jobjt==NULL)
			{
				LM_ERR("cannot create json object\n");
				return -1;
			}
		} else {
			jobjt = srjson_CreateNumber(jdoc, avp_value.n);
			if(jobjt==NULL)
			{
				LM_ERR("cannot create json object\n");
				return -1;
			}
		}
		srjson_AddItemToArray(jdoc, *jobj, jobjt);
	} while ((avp=search_next_avp(&state, &avp_value))!=0);
ok:
	item_name->s = avp_name.s.s;
	item_name->len = avp_name.s.len;
	return 0;
}
#define CFGT_XAVP_DUMP_SIZE 32
static str* _cfgt_xavp_dump[CFGT_XAVP_DUMP_SIZE];
int _cfgt_xavp_dump_lookup(pv_param_t *param)
{
	unsigned int i = 0;
	pv_xavp_name_t *xname;

	if(param==NULL)
		return -1;

	xname = (pv_xavp_name_t*)param->pvn.u.dname;

	while(_cfgt_xavp_dump[i]!=NULL&&i<CFGT_XAVP_DUMP_SIZE)
	{
		if(_cfgt_xavp_dump[i]->len==xname->name.len)
		{
			if(strncmp(_cfgt_xavp_dump[i]->s, xname->name.s, xname->name.len)==0)
				return 1; /* already dump before */
		}
		i++;
	}
	if(i==CFGT_XAVP_DUMP_SIZE)
	{
		LM_WARN("full _cfgt_xavp_dump cache array\n");
		return 0; /* end cache names */
	}
	_cfgt_xavp_dump[i] = &xname->name;
	return 0;
}

void _cfgt_get_obj_xavp_val(sr_xavp_t *avp, srjson_doc_t *jdoc, srjson_t **jobj)
{
	static char _pv_xavp_buf[128];
	int result = 0;

	switch(avp->val.type) {
		case SR_XTYPE_NULL:
			*jobj = srjson_CreateNull(jdoc);
		break;
		case SR_XTYPE_INT:
			*jobj = srjson_CreateNumber(jdoc, avp->val.v.i);
		break;
		case SR_XTYPE_STR:
			*jobj = srjson_CreateStr(jdoc, avp->val.v.s.s, avp->val.v.s.len);
		break;
		case SR_XTYPE_TIME:
			result = snprintf(_pv_xavp_buf, 128, "%lu", (long unsigned)avp->val.v.t);
		break;
		case SR_XTYPE_LONG:
			result = snprintf(_pv_xavp_buf, 128, "%ld", (long unsigned)avp->val.v.l);
		break;
		case SR_XTYPE_LLONG:
			result = snprintf(_pv_xavp_buf, 128, "%lld", avp->val.v.ll);
		break;
		case SR_XTYPE_XAVP:
			result = snprintf(_pv_xavp_buf, 128, "<<xavp:%p>>", avp->val.v.xavp);
		break;
		case SR_XTYPE_DATA:
			result = snprintf(_pv_xavp_buf, 128, "<<data:%p>>", avp->val.v.data);
		break;
		default:
			LM_WARN("unknown data type\n");
			*jobj = srjson_CreateNull(jdoc);
	}
	if(result<0)
	{
		LM_ERR("cannot convert to str\n");
		*jobj = srjson_CreateNull(jdoc);
	}
	else if(*jobj==NULL)
	{
		*jobj = srjson_CreateStr(jdoc, _pv_xavp_buf, 128);
	}
}

int _cfgt_get_obj_avp_vals(str name, sr_xavp_t *xavp, srjson_doc_t *jdoc, srjson_t **jobj)
{
	sr_xavp_t *avp = NULL;
	srjson_t *jobjt = NULL;

	*jobj = srjson_CreateArray(jdoc);
	if(*jobj==NULL)
	{
		LM_ERR("cannot create json object\n");
		return -1;
	}
	avp = xavp;
	while(avp!=NULL&&!STR_EQ(avp->name,name))
	{
		avp = avp->next;
	}
	while(avp!=NULL)
	{
		_cfgt_get_obj_xavp_val(avp, jdoc, &jobjt);
		srjson_AddItemToArray(jdoc, *jobj, jobjt);
		jobjt = NULL;
		avp = xavp_get_next(avp);
	}

	return 0;
}

int _cfgt_get_obj_xavp_vals(struct sip_msg *msg,
		pv_param_t *param, srjson_doc_t *jdoc, srjson_t **jobjr,
		str *item_name)
{
	pv_xavp_name_t *xname = (pv_xavp_name_t*)param->pvn.u.dname;
	sr_xavp_t *xavp = NULL;
	sr_xavp_t *avp = NULL;
	srjson_t *jobj = NULL;
	srjson_t *jobjt = NULL;
	struct str_list *keys;
	struct str_list *k;

	*jobjr = srjson_CreateArray(jdoc);
	if(*jobjr==NULL)
	{
		LM_ERR("cannot create json object\n");
		return -1;
	}

	item_name->s = xname->name.s;
	item_name->len = xname->name.len;
	xavp = xavp_get_by_index(&xname->name, 0, NULL);
	if(xavp==NULL)
	{
		return 0; /* empty */
	}

	do
	{
		if(xavp->val.type==SR_XTYPE_XAVP)
		{
			avp = xavp->val.v.xavp;
			jobj = srjson_CreateObject(jdoc);
			if(jobj==NULL)
			{
				LM_ERR("cannot create json object\n");
				return -1;
			}
			keys = xavp_get_list_key_names(xavp);
			if(keys!=NULL)
			{
				do
				{
					_cfgt_get_obj_avp_vals(keys->s, avp, jdoc, &jobjt);
					srjson_AddStrItemToObject(jdoc, jobj, keys->s.s,
						keys->s.len, jobjt);
					k = keys;
					keys = keys->next;
					pkg_free(k);
					jobjt = NULL;
				}while(keys!=NULL);
			}
		}
		if(jobj!=NULL)
		{
			srjson_AddItemToArray(jdoc, *jobjr, jobj);
			jobj = NULL;
		}
	}while((xavp = xavp_get_next(xavp))!=0);

	return 0;
}

int cfgt_get_json(struct sip_msg* msg, unsigned int mask, srjson_doc_t *jdoc,
	srjson_t *head)
{
	int i;
	pv_value_t value;
	pv_cache_t **_pv_cache = pv_cache_get_table();
	pv_cache_t *el = NULL;
	srjson_t *jobj = NULL;
	str item_name = STR_NULL;
	static char iname[128];

	if(_pv_cache==NULL)
	{
		LM_ERR("cannot access pv_cache\n");
		return -1;
	}
	if(jdoc==NULL){
		LM_ERR("jdoc is null\n");
		return -1;
	}
	if(head==NULL){
		LM_ERR("head is null\n");
		return -1;
	}

	memset(_cfgt_xavp_dump, 0, sizeof(str*)*CFGT_XAVP_DUMP_SIZE);
	for(i=0;i<PV_CACHE_SIZE;i++)
	{
		el = _pv_cache[i];
		while(el)
		{
			if(!(el->spec.type==PVT_AVP||
				el->spec.type==PVT_SCRIPTVAR||
				el->spec.type==PVT_XAVP||
				el->spec.type==PVT_OTHER)||
				!((el->spec.type==PVT_AVP&&mask&CFGT_DP_AVP)||
				(el->spec.type==PVT_XAVP&&mask&CFGT_DP_XAVP)||
				(el->spec.type==PVT_SCRIPTVAR&&mask&CFGT_DP_SCRIPTVAR)||
				(el->spec.type==PVT_OTHER&&mask&CFGT_DP_OTHER))||
				(el->spec.trans!=NULL))
			{
				el = el->next;
				continue;
			}
			jobj = NULL;
			item_name.len = 0;
			item_name.s = 0;
			iname[0] = '\0';
			if(el->spec.type==PVT_AVP)
			{
				if(el->spec.pvp.pvi.type==PV_IDX_ALL||
					(el->spec.pvp.pvi.type==PV_IDX_INT&&el->spec.pvp.pvi.u.ival!=0))
				{
					el = el->next;
					continue;
				}
				else
				{
					if(_cfgt_get_array_avp_vals(msg, &el->spec.pvp, jdoc, &jobj, &item_name)!=0)
					{
						LM_WARN("can't get value[%.*s]\n", el->pvname.len, el->pvname.s);
						el = el->next;
						continue;
					}
					if(srjson_GetArraySize(jdoc, jobj)==0 && !(mask&CFGT_DP_NULL))
					{
						el = el->next;
						continue;
					}
					snprintf(iname, 128, "$avp(%.*s)", item_name.len, item_name.s);
				}
			}
			else if(el->spec.type==PVT_XAVP)
			{
				if(_cfgt_xavp_dump_lookup(&el->spec.pvp)!=0)
				{
					el = el->next;
					continue;
				}
				if(_cfgt_get_obj_xavp_vals(msg, &el->spec.pvp, jdoc, &jobj, &item_name)!=0)
				{
					LM_WARN("can't get value[%.*s]\n", el->pvname.len, el->pvname.s);
					el = el->next;
					continue;
				}
				if(srjson_GetArraySize(jdoc, jobj)==0 && !(mask&CFGT_DP_NULL))
				{
					el = el->next;
					continue;
				}
				snprintf(iname, 128, "$xavp(%.*s)", item_name.len, item_name.s);
			}
			else
			{
				if(pv_get_spec_value(msg, &el->spec, &value)!=0)
				{
					LM_WARN("can't get value[%.*s]\n", el->pvname.len, el->pvname.s);
					el = el->next;
					continue;
				}
				if(value.flags&(PV_VAL_NULL|PV_VAL_EMPTY|PV_VAL_NONE))
				{
					if(mask&CFGT_DP_NULL)
					{
						jobj = srjson_CreateNull(jdoc);
					}
					else
					{
						el = el->next;
						continue;
					}
				}else if(value.flags&(PV_VAL_INT)){
					jobj = srjson_CreateNumber(jdoc, value.ri);
				}else if(value.flags&(PV_VAL_STR)){
					jobj = srjson_CreateStr(jdoc, value.rs.s, value.rs.len);
				}else {
					LM_WARN("el->pvname[%.*s] value[%d] unhandled\n", el->pvname.len, el->pvname.s,
						value.flags);
					el = el->next;
					continue;
				}
				if(jobj==NULL)
				{
					LM_ERR("el->pvname[%.*s] empty json object\n", el->pvname.len,
						el->pvname.s);
					goto error;
				}
				snprintf(iname, 128, "%.*s", el->pvname.len, el->pvname.s);
			}
			if(jobj!=NULL)
			{
				srjson_AddItemToObject(jdoc, head, iname, jobj);
			}
			el = el->next;
		}
	}
	return 0;

error:
	srjson_Delete(jdoc, head);
	return -1;
}