// $Id: inter.c,v 1.1.1.1 2004/09/10 17:26:51 MagicalTux Exp $
#include "../common/mmo.h"
#include "char.h"
#include "../common/socket.h"
#include "../common/timer.h"
#include "../common/db.h"
#include <string.h>
#include <stdlib.h>

#include "inter.h"
#include "int_party.h"
#include "int_guild.h"
#include "int_storage.h"
#include "../common/lock.h"

#define WISDATA_TTL (60*1000)   // Existence time of Wisp/page data (60 seconds)
                                // that is the waiting time of answers of all map-servers
#define WISDELLIST_MAX 256      // Number of elements of Wisp/page data deletion list

char inter_log_filename[1024] = "log/inter.log";

char accreg_txt[1024] = "save/accreg.txt";
static struct dbt *accreg_db = NULL;

struct accreg
{
    int  account_id, reg_num;
    struct global_reg reg[ACCOUNT_REG_NUM];
};

int  party_share_level = 10;

// 送信パケット長リスト
int  inter_send_packet_length[] = {
    -1, -1, 27, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    -1, 7, 0, 0, 0, 0, 0, 0, -1, 11, 0, 0, 0, 0, 0, 0,
    35, -1, 11, 15, 34, 29, 7, -1, 0, 0, 0, 0, 0, 0, 0, 0,
    10, -1, 15, 0, 79, 19, 7, -1, 0, -1, -1, -1, 14, 67, 186, -1,
    9, 9, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    11, -1, 7, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};

// 受信パケット長リスト
int  inter_recv_packet_length[] = {
    -1, -1, 7, -1, -1, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    6, -1, 0, 0, 0, 0, 0, 0, 10, -1, 0, 0, 0, 0, 0, 0,
    72, 6, 52, 14, 10, 29, 6, -1, 34, 0, 0, 0, 0, 0, 0, 0,
    -1, 6, -1, 0, 55, 19, 6, -1, 14, -1, -1, -1, 14, 19, 186, -1,
    5, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    48, 14, -1, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};

struct WisData
{
    int  id, fd, count, len;
    unsigned long tick;
    unsigned char src[24], dst[24], msg[1024];
};
static struct dbt *wis_db = NULL;
static int wis_dellist[WISDELLIST_MAX], wis_delnum;

//--------------------------------------------------------

// アカウント変数を文字列へ変換
int inter_accreg_tostr (char *str, struct accreg *reg)
{
    int  j;
    char *p = str;

    p += sprintf (p, "%d\t", reg->account_id);
    for (j = 0; j < reg->reg_num; j++)
    {
        p += sprintf (p, "%s,%d ", reg->reg[j].str, reg->reg[j].value);
    }

    return 0;
}

// アカウント変数を文字列から変換
int inter_accreg_fromstr (const char *str, struct accreg *reg)
{
    int  j, v, n;
    char buf[128];
    const char *p = str;

    if (sscanf (p, "%d\t%n", &reg->account_id, &n) != 1
        || reg->account_id <= 0)
        return 1;

    for (j = 0, p += n; j < ACCOUNT_REG_NUM; j++, p += n)
    {
        if (sscanf (p, "%[^,],%d %n", buf, &v, &n) != 2)
            break;
        memcpy (reg->reg[j].str, buf, 32);
        reg->reg[j].value = v;
    }
    reg->reg_num = j;

    return 0;
}

// アカウント変数の読み込み
int inter_accreg_init (void)
{
    char line[8192];
    FILE *fp;
    int  c = 0;
    struct accreg *reg;

    accreg_db = numdb_init ();

    if ((fp = fopen_ (accreg_txt, "r")) == NULL)
        return 1;
    while (fgets (line, sizeof (line) - 1, fp))
    {
        line[sizeof (line) - 1] = '\0';
        CREATE (reg, struct accreg, 1);
        if (inter_accreg_fromstr (line, reg) == 0 && reg->account_id > 0)
        {
            numdb_insert (accreg_db, reg->account_id, reg);
        }
        else
        {
            printf ("inter: accreg: broken data [%s] line %d\n", accreg_txt,
                    c);
            free (reg);
        }
        c++;
    }
    fclose_ (fp);
//  printf("inter: %s read done (%d)\n", accreg_txt, c);

    return 0;
}

// アカウント変数のセーブ用
void inter_accreg_save_sub (db_key_t key, db_val_t data, va_list ap)
{
    char line[8192];
    FILE *fp;
    struct accreg *reg = (struct accreg *) data;

    if (reg->reg_num > 0)
    {
        inter_accreg_tostr (line, reg);
        fp = va_arg (ap, FILE *);
        fprintf (fp, "%s\n", line);
    }
}

// アカウント変数のセーブ
int inter_accreg_save (void)
{
    FILE *fp;
    int  lock;

    if ((fp = lock_fopen (accreg_txt, &lock)) == NULL)
    {
        printf ("int_accreg: cant write [%s] !!! data is lost !!!\n",
                accreg_txt);
        return 1;
    }
    numdb_foreach (accreg_db, inter_accreg_save_sub, fp);
    lock_fclose (fp, accreg_txt, &lock);
//  printf("inter: %s saved.\n", accreg_txt);

    return 0;
}

//--------------------------------------------------------

/*==========================================
 * 設定ファイルを読み込む
 *------------------------------------------
 */
int inter_config_read (const char *cfgName)
{
    char line[1024], w1[1024], w2[1024];
    FILE *fp;

    fp = fopen_ (cfgName, "r");
    if (fp == NULL)
    {
        printf ("file not found: %s\n", cfgName);
        return 1;
    }
    while (fgets (line, sizeof (line) - 1, fp))
    {
        if (line[0] == '/' && line[1] == '/')
            continue;
        line[sizeof (line) - 1] = '\0';

        if (sscanf (line, "%[^:]: %[^\r\n]", w1, w2) != 2)
            continue;

        if (strcasecmp (w1, "storage_txt") == 0)
        {
            strncpy (storage_txt, w2, sizeof (storage_txt));
        }
        else if (strcasecmp (w1, "party_txt") == 0)
        {
            strncpy (party_txt, w2, sizeof (party_txt));
        }
        else if (strcasecmp (w1, "guild_txt") == 0)
        {
            strncpy (guild_txt, w2, sizeof (guild_txt));
        }
        else if (strcasecmp (w1, "castle_txt") == 0)
        {
            strncpy (castle_txt, w2, sizeof (castle_txt));
        }
        else if (strcasecmp (w1, "accreg_txt") == 0)
        {
            strncpy (accreg_txt, w2, sizeof (accreg_txt));
        }
        else if (strcasecmp (w1, "guild_storage_txt") == 0)
        {
            strncpy (guild_storage_txt, w2, sizeof (guild_storage_txt));
        }
        else if (strcasecmp (w1, "party_share_level") == 0)
        {
            party_share_level = atoi (w2);
            if (party_share_level < 0)
                party_share_level = 0;
        }
        else if (strcasecmp (w1, "inter_log_filename") == 0)
        {
            strncpy (inter_log_filename, w2, sizeof (inter_log_filename));
        }
        else if (strcasecmp (w1, "import") == 0)
        {
            inter_config_read (w2);
        }
    }
    fclose_ (fp);

    return 0;
}

// ログ書き出し
int inter_log (char *fmt, ...)
{
    FILE *logfp;
    va_list ap;

    va_start (ap, fmt);
    logfp = fopen_ (inter_log_filename, "a");
    if (logfp)
    {
        vfprintf (logfp, fmt, ap);
        fclose_ (logfp);
    }
    va_end (ap);

    return 0;
}

// セーブ
int inter_save (void)
{
    inter_party_save ();
    inter_guild_save ();
    inter_storage_save ();
    inter_guild_storage_save ();
    inter_accreg_save ();

    return 0;
}

// 初期化
int inter_init (const char *file)
{
    inter_config_read (file);

    wis_db = numdb_init ();

    inter_party_init ();
    inter_guild_init ();
    inter_storage_init ();
    inter_accreg_init ();

    return 0;
}

// マップサーバー接続
int inter_mapif_init (int fd)
{
    inter_guild_mapif_init (fd);

    return 0;
}

//--------------------------------------------------------
// sended packets to map-server

// GMメッセージ送信
int mapif_GMmessage (unsigned char *mes, int len)
{
    unsigned char buf[len];

    WBUFW (buf, 0) = 0x3800;
    WBUFW (buf, 2) = len;
    memcpy (WBUFP (buf, 4), mes, len - 4);
    mapif_sendall (buf, len);
//  printf("inter server: GM:%d %s\n", len, mes);

    return 0;
}

// Wisp/page transmission to all map-server
int mapif_wis_message (struct WisData *wd)
{
    unsigned char buf[56 + wd->len];

    WBUFW (buf, 0) = 0x3801;
    WBUFW (buf, 2) = 56 + wd->len;
    WBUFL (buf, 4) = wd->id;
    memcpy (WBUFP (buf, 8), wd->src, 24);
    memcpy (WBUFP (buf, 32), wd->dst, 24);
    memcpy (WBUFP (buf, 56), wd->msg, wd->len);
    wd->count = mapif_sendall (buf, WBUFW (buf, 2));

    return 0;
}

// Wisp/page transmission result to map-server
int mapif_wis_end (struct WisData *wd, int flag)
{
    unsigned char buf[27];

    WBUFW (buf, 0) = 0x3802;
    memcpy (WBUFP (buf, 2), wd->src, 24);
    WBUFB (buf, 26) = flag;     // flag: 0: success to send wisper, 1: target character is not loged in?, 2: ignored by target
    mapif_send (wd->fd, buf, 27);
//  printf("inter server wis_end: flag: %d\n", flag);

    return 0;
}

// アカウント変数送信
int mapif_account_reg (int fd, unsigned char *src)
{
    unsigned char buf[WBUFW (src, 2)];

    memcpy (WBUFP (buf, 0), src, WBUFW (src, 2));
    WBUFW (buf, 0) = 0x3804;
    mapif_sendallwos (fd, buf, WBUFW (buf, 2));

    return 0;
}

// アカウント変数要求返信
int mapif_account_reg_reply (int fd, int account_id)
{
    struct accreg *reg = (struct accreg *)numdb_search (accreg_db, account_id);

    WFIFOW (fd, 0) = 0x3804;
    WFIFOL (fd, 4) = account_id;
    if (reg == NULL)
    {
        WFIFOW (fd, 2) = 8;
    }
    else
    {
        int  j, p;
        for (j = 0, p = 8; j < reg->reg_num; j++, p += 36)
        {
            memcpy (WFIFOP (fd, p), reg->reg[j].str, 32);
            WFIFOL (fd, p + 32) = reg->reg[j].value;
        }
        WFIFOW (fd, 2) = p;
    }
    WFIFOSET (fd, WFIFOW (fd, 2));

    return 0;
}

//--------------------------------------------------------

// Existence check of WISP data
void check_ttl_wisdata_sub (db_key_t key, db_val_t data, va_list ap)
{
    unsigned long tick;
    struct WisData *wd = (struct WisData *) data;
    tick = va_arg (ap, unsigned long);

    if (DIFF_TICK (tick, wd->tick) > WISDATA_TTL
        && wis_delnum < WISDELLIST_MAX)
        wis_dellist[wis_delnum++] = wd->id;
}

int check_ttl_wisdata (void)
{
    unsigned long tick = gettick ();
    int  i;

    do
    {
        wis_delnum = 0;
        numdb_foreach (wis_db, check_ttl_wisdata_sub, tick);
        for (i = 0; i < wis_delnum; i++)
        {
            struct WisData *wd = (struct WisData *)numdb_search (wis_db, wis_dellist[i]);
            printf ("inter: wis data id=%d time out : from %s to %s\n",
                    wd->id, wd->src, wd->dst);
            // removed. not send information after a timeout. Just no answer for the player
            //mapif_wis_end(wd, 1); // flag: 0: success to send wisper, 1: target character is not loged in?, 2: ignored by target
            numdb_erase (wis_db, wd->id);
            free (wd);
        }
    }
    while (wis_delnum >= WISDELLIST_MAX);

    return 0;
}

//--------------------------------------------------------
// received packets from map-server

// GMメッセージ送信
int mapif_parse_GMmessage (int fd)
{
    mapif_GMmessage (RFIFOP (fd, 4), RFIFOW (fd, 2));

    return 0;
}

// Wisp/page request to send
int mapif_parse_WisRequest (int fd)
{
    struct WisData *wd;
    static int wisid = 0;
    int  index;

    if (RFIFOW (fd, 2) - 52 >= sizeof (wd->msg))
    {
        printf ("inter: Wis message size too long.\n");
        return 0;
    }
    else if (RFIFOW (fd, 2) - 52 <= 0)
    {                           // normaly, impossible, but who knows...
        printf ("inter: Wis message doesn't exist.\n");
        return 0;
    }

    // search if character exists before to ask all map-servers
    if ((index = search_character_index (RFIFOP (fd, 28))) == -1)
    {
        unsigned char buf[27];
        WBUFW (buf, 0) = 0x3802;
        memcpy (WBUFP (buf, 2), RFIFOP (fd, 4), 24);
        WBUFB (buf, 26) = 1;    // flag: 0: success to send wisper, 1: target character is not loged in?, 2: ignored by target
        mapif_send (fd, buf, 27);
        // Character exists. So, ask all map-servers
    }
    else
    {
        // to be sure of the correct name, rewrite it
        memset (RFIFOP (fd, 28), 0, 24);
        strncpy (RFIFOP (fd, 28), search_character_name (index), 24);
        // if source is destination, don't ask other servers.
        if (strcmp (RFIFOP (fd, 4), RFIFOP (fd, 28)) == 0)
        {
            unsigned char buf[27];
            WBUFW (buf, 0) = 0x3802;
            memcpy (WBUFP (buf, 2), RFIFOP (fd, 4), 24);
            WBUFB (buf, 26) = 1;    // flag: 0: success to send wisper, 1: target character is not loged in?, 2: ignored by target
            mapif_send (fd, buf, 27);
        }
        else
        {
            CREATE (wd, struct WisData, 1);

            // Whether the failure of previous wisp/page transmission (timeout)
            check_ttl_wisdata ();

            wd->id = ++wisid;
            wd->fd = fd;
            wd->len = RFIFOW (fd, 2) - 52;
            memcpy (wd->src, RFIFOP (fd, 4), 24);
            memcpy (wd->dst, RFIFOP (fd, 28), 24);
            memcpy (wd->msg, RFIFOP (fd, 52), wd->len);
            wd->tick = gettick ();
            numdb_insert (wis_db, wd->id, wd);
            mapif_wis_message (wd);
        }
    }

    return 0;
}

// Wisp/page transmission result
int mapif_parse_WisReply (int fd)
{
    int  id = RFIFOL (fd, 2), flag = RFIFOB (fd, 6);
    struct WisData *wd = (struct WisData *)numdb_search (wis_db, id);

    if (wd == NULL)
        return 0;               // This wisp was probably suppress before, because it was timeout of because of target was found on another map-server

    if ((--wd->count) <= 0 || flag != 1)
    {
        mapif_wis_end (wd, flag);   // flag: 0: success to send wisper, 1: target character is not loged in?, 2: ignored by target
        numdb_erase (wis_db, id);
        free (wd);
    }

    return 0;
}

// Received wisp message from map-server for ALL gm (just copy the message and resends it to ALL map-servers)
int mapif_parse_WisToGM (int fd)
{
    unsigned char buf[RFIFOW (fd, 2)];  // 0x3003/0x3803 <packet_len>.w <wispname>.24B <min_gm_level>.w <message>.?B

    memcpy (WBUFP (buf, 0), RFIFOP (fd, 0), RFIFOW (fd, 2));
    WBUFW (buf, 0) = 0x3803;
    mapif_sendall (buf, RFIFOW (fd, 2));

    return 0;
}

// アカウント変数保存要求
int mapif_parse_AccReg (int fd)
{
    int  j, p;
    struct accreg *reg = (struct accreg*)numdb_search (accreg_db, (numdb_key_t)RFIFOL (fd, 4));

    if (reg == NULL)
    {
        CREATE (reg, struct accreg, 1);
        reg->account_id = RFIFOL (fd, 4);
        numdb_insert (accreg_db, (numdb_key_t)RFIFOL (fd, 4), reg);
    }

    for (j = 0, p = 8; j < ACCOUNT_REG_NUM && p < RFIFOW (fd, 2);
         j++, p += 36)
    {
        memcpy (reg->reg[j].str, RFIFOP (fd, p), 32);
        reg->reg[j].value = RFIFOL (fd, p + 32);
    }
    reg->reg_num = j;

    mapif_account_reg (fd, RFIFOP (fd, 0)); // 他のMAPサーバーに送信

    return 0;
}

// アカウント変数送信要求
int mapif_parse_AccRegRequest (int fd)
{
//  printf("mapif: accreg request\n");
    return mapif_account_reg_reply (fd, RFIFOL (fd, 2));
}

//--------------------------------------------------------

// map server からの通信（１パケットのみ解析すること）
// エラーなら0(false)、処理できたなら1、
// パケット長が足りなければ2をかえさなければならない
int inter_parse_frommap (int fd)
{
    int  cmd = RFIFOW (fd, 0);
    int  len = 0;

    // inter鯖管轄かを調べる
    if (cmd < 0x3000
        || cmd >=
        0x3000 +
        (sizeof (inter_recv_packet_length) /
         sizeof (inter_recv_packet_length[0])))
        return 0;

    // パケット長を調べる
    if ((len =
         inter_check_length (fd,
                             inter_recv_packet_length[cmd - 0x3000])) == 0)
        return 2;

    switch (cmd)
    {
        case 0x3000:
            mapif_parse_GMmessage (fd);
            break;
        case 0x3001:
            mapif_parse_WisRequest (fd);
            break;
        case 0x3002:
            mapif_parse_WisReply (fd);
            break;
        case 0x3003:
            mapif_parse_WisToGM (fd);
            break;
        case 0x3004:
            mapif_parse_AccReg (fd);
            break;
        case 0x3005:
            mapif_parse_AccRegRequest (fd);
            break;
        default:
            if (inter_party_parse_frommap (fd))
                break;
            if (inter_guild_parse_frommap (fd))
                break;
            if (inter_storage_parse_frommap (fd))
                break;
            return 0;
    }
    RFIFOSKIP (fd, len);

    return 1;
}

// RFIFOのパケット長確認
// 必要パケット長があればパケット長、まだ足りなければ0
int inter_check_length (int fd, int length)
{
    if (length == -1)
    {                           // 可変パケット長
        if (RFIFOREST (fd) < 4) // パケット長が未着
            return 0;
        length = RFIFOW (fd, 2);
    }

    if (RFIFOREST (fd) < length)    // パケットが未着
        return 0;

    return length;
}