/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _TD_VNODE_TQ_H_
#define _TD_VNODE_TQ_H_

#include "vnodeInt.h"

#include "executor.h"
#include "os.h"
#include "thash.h"
#include "tmsg.h"
#include "tqueue.h"
#include "trpc.h"
#include "ttimer.h"
#include "wal.h"

#ifdef __cplusplus
extern "C" {
#endif

// tqDebug ===================
// clang-format off
#define tqFatal(...) do { if (tqDebugFlag & DEBUG_FATAL) { taosPrintLog("TQ  FATAL ", DEBUG_FATAL, 255, __VA_ARGS__); }}     while(0)
#define tqError(...) do { if (tqDebugFlag & DEBUG_ERROR) { taosPrintLog("TQ  ERROR ", DEBUG_ERROR, 255, __VA_ARGS__); }}     while(0)
#define tqWarn(...)  do { if (tqDebugFlag & DEBUG_WARN)  { taosPrintLog("TQ  WARN ", DEBUG_WARN, 255, __VA_ARGS__); }}       while(0)
#define tqInfo(...)  do { if (tqDebugFlag & DEBUG_INFO)  { taosPrintLog("TQ  ", DEBUG_INFO, 255, __VA_ARGS__); }}            while(0)
#define tqDebug(...) do { if (tqDebugFlag & DEBUG_DEBUG) { taosPrintLog("TQ  ", DEBUG_DEBUG, tqDebugFlag, __VA_ARGS__); }} while(0)
#define tqTrace(...) do { if (tqDebugFlag & DEBUG_TRACE) { taosPrintLog("TQ  ", DEBUG_TRACE, tqDebugFlag, __VA_ARGS__); }} while(0)
// clang-format on

typedef struct STqOffsetCfg   STqOffsetCfg;
typedef struct STqOffsetStore STqOffsetStore;

struct STqReadHandle {
  int64_t           ver;
  SHashObj*         tbIdHash;
  const SSubmitReq* pMsg;
  SSubmitBlk*       pBlock;
  SSubmitMsgIter    msgIter;
  SSubmitBlkIter    blkIter;
  SMeta*            pVnodeMeta;
  SArray*           pColIdList;  // SArray<int16_t>
  int32_t           sver;
  int64_t           cachedSchemaUid;
  SSchemaWrapper*   pSchemaWrapper;
  STSchema*         pSchema;
};

typedef struct {
  int64_t  consumerId;
  int32_t  epoch;
  int32_t  skipLogNum;
  int64_t  reqOffset;
  SRWLatch lock;
  SRpcMsg* handle;
} STqPushHandle;

typedef struct {
  char          subKey[TSDB_SUBSCRIBE_KEY_LEN];
  int64_t       consumerId;
  int32_t       epoch;
  int8_t        subType;
  int8_t        withTbName;
  int8_t        withSchema;
  int8_t        withTag;
  char*         qmsg;
  SHashObj*     pDropTbUid;
  STqPushHandle pushHandle;
  // SRWLatch        lock;
  SWalReadHandle* pWalReader;
  // task number should be the same with fetch thread
  STqReadHandle* pExecReader[5];
  qTaskInfo_t    task[5];
} STqExec;

int32_t tEncodeSTqExec(SEncoder* pEncoder, const STqExec* pExec);
int32_t tDecodeSTqExec(SDecoder* pDecoder, STqExec* pExec);

struct STQ {
  char*     path;
  SHashObj* pushMgr;  // consumerId -> STqExec*
  SHashObj* execs;    // subKey -> STqExec
  SHashObj* pStreamTasks;
  SVnode*   pVnode;
  SWal*     pWal;
  TDB*      pTdb;
};

typedef struct {
  int8_t inited;
  tmr_h  timer;
} STqMgmt;

static STqMgmt tqMgmt;

// init once
int  tqInit();
void tqCleanUp();

// tqOffset
STqOffsetStore* STqOffsetOpen(STqOffsetCfg*);
void            STqOffsetClose(STqOffsetStore*);

int64_t tqOffsetFetch(STqOffsetStore* pStore, const char* subscribeKey);
int32_t tqOffsetCommit(STqOffsetStore* pStore, const char* subscribeKey, int64_t offset);
int32_t tqOffsetPersist(STqOffsetStore* pStore, const char* subscribeKey);
int32_t tqOffsetPersistAll(STqOffsetStore* pStore);

#ifdef __cplusplus
}
#endif

#endif /*_TD_VNODE_TQ_H_*/