/******************************************************************************
 * Copyright © 2014-2016 The SuperNET Developers.                             *
 *                                                                            *
 * See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at                  *
 * the top-level directory of this distribution for the individual copyright  *
 * holder information and the developer policies on copyright and licensing.  *
 *                                                                            *
 * Unless otherwise agreed in a custom licensing agreement, no part of the    *
 * SuperNET software, including this file may be copied, modified, propagated *
 * or distributed except according to the terms contained in the LICENSE file *
 *                                                                            *
 * Removal or modification of this copyright notice is prohibited.            *
 *                                                                            *
 ******************************************************************************/

bits256 dpow_getbestblockhash(struct supernet_info *myinfo,struct iguana_info *coin)
{
    char *retstr; bits256 blockhash;
    memset(blockhash.bytes,0,sizeof(blockhash));
    if ( coin->FULLNODE < 0 )
    {
        if ( (retstr= bitcoind_passthru(coin->symbol,coin->chain->serverport,coin->chain->userpass,"getbestblockhash","")) != 0 )
        {
            //printf("%s getbestblockhash.(%s)\n",coin->symbol,retstr);
            if ( is_hexstr(retstr,0) == sizeof(blockhash)*2 )
                decode_hex(blockhash.bytes,sizeof(blockhash),retstr);
            free(retstr);
        }
    }
    else if ( coin->FULLNODE > 0 || coin->VALIDATENODE > 0 )
    {
        blockhash = coin->blocks.hwmchain.RO.hash2;
    }
    else
    {
        
    }
    return(blockhash);
}

cJSON *dpow_getblock(struct supernet_info *myinfo,struct iguana_info *coin,bits256 blockhash)
{
    char buf[128],str[65],*retstr=0; cJSON *json = 0;
    if ( coin->FULLNODE < 0 )
    {
        sprintf(buf,"\"%s\"",bits256_str(str,blockhash));
        retstr = bitcoind_passthru(coin->symbol,coin->chain->serverport,coin->chain->userpass,"getblock",buf);
        //printf("%s getblock.(%s)\n",coin->symbol,retstr);
    }
    else if ( coin->FULLNODE > 0 || coin->VALIDATENODE > 0 )
    {
        retstr = bitcoinrpc_getblock(myinfo,coin,0,0,blockhash,1,0);
    }
    else
    {
        return(0);
    }
    if ( retstr != 0 )
    {
        json = cJSON_Parse(retstr);
        free(retstr);
    }
    return(json);
}

char *dpow_decoderawtransaction(struct supernet_info *myinfo,struct iguana_info *coin,char *rawtx)
{
    char *retstr,*paramstr; cJSON *array;
    if ( coin->FULLNODE < 0 )
    {
        array = cJSON_CreateArray();
        jaddistr(array,rawtx);
        paramstr = jprint(array,1);
        retstr = bitcoind_passthru(coin->symbol,coin->chain->serverport,coin->chain->userpass,"decoderawtransaction",paramstr);
        //printf("%s decoderawtransaction.(%s) <- (%s)\n",coin->symbol,retstr,paramstr);
        free(paramstr);
    }
    else if ( coin->FULLNODE > 0 || coin->VALIDATENODE > 0 )
    {
        retstr = bitcoinrpc_decoderawtransaction(myinfo,coin,0,0,rawtx,1);
    }
    else
    {
        return(0);
    }
    return(retstr);
}

cJSON *dpow_gettransaction(struct supernet_info *myinfo,struct iguana_info *coin,bits256 txid)
{
    char buf[128],str[65],*retstr=0,*rawtx=0; cJSON *json = 0;
    if ( coin->FULLNODE < 0 )
    {
        sprintf(buf,"[\"%s\", 1]",bits256_str(str,txid));
        if ( (rawtx= bitcoind_passthru(coin->symbol,coin->chain->serverport,coin->chain->userpass,"getrawtransaction",buf)) != 0 )
        {
            retstr = dpow_decoderawtransaction(myinfo,coin,rawtx);
            free(rawtx);
        }
    }
    else if ( coin->FULLNODE > 0 || coin->VALIDATENODE > 0 )
    {
        retstr = bitcoinrpc_getrawtransaction(myinfo,coin,0,0,txid,1);
    }
    else
    {
        return(0);
    }
    if ( retstr != 0 )
    {
        json = cJSON_Parse(retstr);
        free(retstr);
    }
    return(json);
}

cJSON *dpow_listunspent(struct supernet_info *myinfo,struct iguana_info *coin,char *coinaddr)
{
    char buf[128],*retstr; cJSON *json = 0;
    if ( coin->FULLNODE < 0 )
    {
        sprintf(buf,"0, 99999999, [\"%s\"]",coinaddr);
        if ( (retstr= bitcoind_passthru(coin->symbol,coin->chain->serverport,coin->chain->userpass,"listunspent",buf)) != 0 )
        {
            json = cJSON_Parse(retstr);
            //printf("%s (%s) listunspent.(%s)\n",coin->symbol,buf,retstr);
            free(retstr);
        } else printf("%s null retstr from (%s)n",coin->symbol,buf);
    }
    else if ( coin->FULLNODE > 0 || coin->VALIDATENODE > 0 )
    {
        json = iguana_listunspents(myinfo,coin,0,1,coin->longestchain,"");
    }
    else
    {
        return(0);
    }
    return(json);
}

char *dpow_signrawtransaction(struct supernet_info *myinfo,struct iguana_info *coin,char *rawtx,cJSON *vins)
{
    cJSON *array,*privkeys,*item; char *wifstr,*str,*paramstr,*retstr; uint8_t script[256]; int32_t i,n,len,hashtype; struct vin_info V; struct iguana_waddress *waddr; struct iguana_waccount *wacct;
    if ( coin->FULLNODE < 0 )
    {
        array = cJSON_CreateArray();
        jaddistr(array,rawtx);
        jaddi(array,jduplicate(vins));
        paramstr = jprint(array,1);
        retstr = bitcoind_passthru(coin->symbol,coin->chain->serverport,coin->chain->userpass,"signrawtransaction",paramstr);
        //printf("%s signrawtransaction.(%s) params.(%s)\n",coin->symbol,retstr,paramstr);
        free(paramstr);
        return(retstr);
    }
    else if ( coin->FULLNODE > 0 || coin->VALIDATENODE > 0 )
    {
        privkeys = cJSON_CreateArray();
        if ( (n= cJSON_GetArraySize(vins)) > 0 )
        {
            for (i=0; i<n; i++)
            {
                wifstr = "";
                item = jitem(vins,i);
                if ( (str= jstr(item,"scriptPubkey")) != 0 && is_hexstr(str,0) > 0 && strlen(str) < sizeof(script)*2 )
                {
                    len = (int32_t)strlen(str) >> 1;
                    decode_hex(script,len,str);
                    V.spendlen = len;
                    memcpy(V.spendscript,script,len);
                    if ( (hashtype= _iguana_calcrmd160(coin,&V)) >= 0 && V.coinaddr[0] != 0 )
                    {
                        if ( (waddr= iguana_waddresssearch(myinfo,&wacct,V.coinaddr)) != 0 )
                        {
                            if ( bits256_nonz(waddr->privkey) != 0 )
                            {
                                if ( bitcoin_priv2wif(waddr->wifstr,waddr->privkey,coin->chain->wiftype) > 0 )
                                {
                                    wifstr = waddr->wifstr;
                                }
                            }
                        }
                    }
                }
                jaddistr(privkeys,wifstr);
            }
        }
        retstr = bitcoinrpc_signrawtransaction(myinfo,coin,0,0,rawtx,vins,privkeys,"ALL");
        free_json(privkeys);
        return(retstr);
    }
    else
    {
        return(0);
    }
}

char *dpow_sendrawtransaction(struct supernet_info *myinfo,struct iguana_info *coin,char *signedtx)
{
    bits256 txid; cJSON *json,*array; char *paramstr,*retstr;
    if ( coin->FULLNODE < 0 )
    {
        array = cJSON_CreateArray();
        jaddistr(array,signedtx);
        paramstr = jprint(array,1);
        retstr = bitcoind_passthru(coin->symbol,coin->chain->serverport,coin->chain->userpass,"sendrawtransaction",paramstr);
        printf(">>>>>>>>>>> %s sendrawtransaction.(%s) -> %s\n",coin->symbol,paramstr,retstr);
        free(paramstr);
        return(retstr);
    }
    else if ( coin->FULLNODE > 0 || coin->VALIDATENODE > 0 )
    {
        txid = iguana_sendrawtransaction(myinfo,coin,signedtx);
        json = cJSON_CreateObject();
        jaddbits256(json,"result",txid);
        return(jprint(json,1));
    }
    else
    {
        return(0);
    }
}

int32_t dpow_getchaintip(struct supernet_info *myinfo,bits256 *blockhashp,uint32_t *blocktimep,bits256 *txs,uint32_t *numtxp,struct iguana_info *coin)
{
    int32_t n,i,height = -1,maxtx = *numtxp; bits256 besthash; cJSON *array,*json;
    *numtxp = *blocktimep = 0;
    *blockhashp = besthash = dpow_getbestblockhash(myinfo,coin);
    if ( bits256_nonz(besthash) != 0 )
    {
        if ( (json= dpow_getblock(myinfo,coin,besthash)) != 0 )
        {
            if ( (height= juint(json,"height")) != 0 && (*blocktimep= juint(json,"time")) != 0 )
            {
                if ( (array= jarray(&n,json,"tx")) != 0 )
                {
                    for (i=0; i<n&&i<maxtx; i++)
                        txs[i] = jbits256i(array,i);
                    //printf("dpow_getchaintip %s ht.%d time.%u numtx.%d\n",coin->symbol,height,*blocktimep,n);
                    *numtxp = n;
                }
            } else height = -1;
            free_json(json);
        }
    }
    return(height);
}

int32_t dpow_vini_ismine(struct supernet_info *myinfo,cJSON *item)
{
    cJSON *sobj; char *hexstr; int32_t len; uint8_t data[35];
    if ( (sobj= jobj(item,"scriptPubKey")) != 0 && (hexstr= jstr(sobj,"hex")) != 0 )
    {
        len = (int32_t)strlen(hexstr) >> 1;
        if ( len <= sizeof(data) )
        {
            decode_hex(data,len,hexstr);
            if ( len == 35 && data[34] == CHECKSIG && data[0] == 33 && memcmp(data+1,myinfo->DPOW.minerkey33,33) == 0 )
                return(0);
        }
    }
    return(-1);
}

int32_t dpow_haveutxo(struct supernet_info *myinfo,struct iguana_info *coin,bits256 *txidp,int32_t *voutp,char *coinaddr)
{
    int32_t i,n,vout,haveutxo = 0; bits256 txid; cJSON *unspents,*item; uint64_t satoshis; char *str,*address; uint8_t script[35];
    memset(txidp,0,sizeof(*txidp));
    *voutp = -1;
    if ( (unspents= dpow_listunspent(myinfo,coin,coinaddr)) != 0 )
    {
        if ( (n= cJSON_GetArraySize(unspents)) > 0 )
        {
            /*{
             "txid" : "34bc21b40d6baf38e2db5be5353dd0bcc9fe416485a2a68753541ed2f9c194b1",
             "vout" : 0,
             "address" : "RFBmvBaRybj9io1UpgWM4pzgufc3E4yza7",
             "scriptPubKey" : "21039a3f7373ae91588b9edd76a9088b2871f62f3438d172b9f18e0581f64887404aac",
             "amount" : 3.00000000,
             "confirmations" : 4282,
             "spendable" : true
             },*/
            for (i=0; i<n; i++)
            {
                item = jitem(unspents,i);
                satoshis = SATOSHIDEN * jdouble(item,"amount");
                if ( satoshis == DPOW_UTXOSIZE && (address= jstr(item,"address")) != 0 && strcmp(address,coinaddr) == 0 )
                {
                    if ( (str= jstr(item,"scriptPubKey")) != 0 && is_hexstr(str,0) == sizeof(script)*2 )
                    {
                        txid = jbits256(item,"txid");
                        vout = jint(item,"vout");
                        if ( bits256_nonz(txid) != 0 && vout >= 0 )
                        {
                            if ( *voutp < 0 || (rand() % (n/2+1)) == 0 )
                            {
                                *voutp = vout;
                                *txidp = txid;
                            }
                            haveutxo++;
                        }
                    }
                }
            }
            if ( haveutxo == 0 )
                printf("no utxo: need to fund address.(%s) or wait for splitfund to confirm\n",coinaddr);
        } else printf("null utxo array size\n");
        free_json(unspents);
    } else printf("null return from dpow_listunspent\n");
    if ( haveutxo > 0 )
        printf("%s haveutxo.%d\n",coin->symbol,haveutxo);
    return(haveutxo);
}