/*
   Copyright (C) 2003-2008 MySQL AB
    All rights reserved. Use is subject to license terms.

   This program 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; version 2 of the License.

   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.  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 St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#ifndef NDB_TRIGGER_DEFINITIONS_H
#define NDB_TRIGGER_DEFINITIONS_H

#include <ndb_global.h>
#include "ndb_limits.h"
#include <Bitmask.hpp>
#include <signaldata/DictTabInfo.hpp>

#define ILLEGAL_TRIGGER_ID ((Uint32)(~0))

struct TriggerType {
  enum Value {
    //CONSTRAINT            = 0,
    SECONDARY_INDEX         = DictTabInfo::HashIndexTrigger,
    FK_PARENT               = DictTabInfo::FKParentTrigger,
    FK_CHILD                = DictTabInfo::FKChildTrigger,
    //SCHEMA_UPGRADE        = 3,
    //API_TRIGGER           = 4,
    //SQL_TRIGGER           = 5,
    SUBSCRIPTION          = DictTabInfo::SubscriptionTrigger,
    READ_ONLY_CONSTRAINT  = DictTabInfo::ReadOnlyConstraint,
    ORDERED_INDEX         = DictTabInfo::IndexTrigger,
    
    SUBSCRIPTION_BEFORE   = 9, // Only used by TUP/SUMA, should be REMOVED!!
    REORG_TRIGGER         = DictTabInfo::ReorgTrigger
  };
};

struct TriggerActionTime {
  enum Value {
    TA_BEFORE   = 0, /* Immediate, before operation */
    TA_AFTER    = 1, /* Immediate, after operation */
    TA_DEFERRED = 2, /* Before commit */
    TA_DETACHED = 3, /* After commit in a separate transaction, NYI */
    TA_CUSTOM   = 4  /* Hardcoded per TriggerType */
  };
};

struct TriggerEvent {
  /** TableEvent must match 1 << TriggerEvent */
  enum Value {
    TE_INSERT = 0,
    TE_DELETE = 1,
    TE_UPDATE = 2,
    TE_CUSTOM = 3    /* Hardcoded per TriggerType */
  };
};

struct TriggerInfo {
  TriggerType::Value triggerType;
  TriggerActionTime::Value triggerActionTime;
  TriggerEvent::Value triggerEvent;
  bool monitorReplicas;
  bool monitorAllAttributes;
  bool reportAllMonitoredAttributes;

  // static methods

  // get/set bits in Uint32
  static TriggerType::Value
  getTriggerType(const Uint32& info) {
    const Uint32 val = BitmaskImpl::getField(1, &info, 0, 8);
    return (TriggerType::Value)val;
  }
  static void
  setTriggerType(Uint32& info, TriggerType::Value val) {
    BitmaskImpl::setField(1, &info, 0, 8, (Uint32)val);
  }
  static TriggerActionTime::Value
  getTriggerActionTime(const Uint32& info) {
    const Uint32 val = BitmaskImpl::getField(1, &info, 8, 8);
    return (TriggerActionTime::Value)val;
  }
  static void
  setTriggerActionTime(Uint32& info, TriggerActionTime::Value val) {
    BitmaskImpl::setField(1, &info, 8, 8, (Uint32)val);
  }
  static TriggerEvent::Value
  getTriggerEvent(const Uint32& info) {
    const Uint32 val = BitmaskImpl::getField(1, &info, 16, 8);
    return (TriggerEvent::Value)val;
  }
  static void
  setTriggerEvent(Uint32& info, TriggerEvent::Value val) {
    BitmaskImpl::setField(1, &info, 16, 8, (Uint32)val);
  }
  static bool
  getMonitorReplicas(const Uint32& info) {
    return BitmaskImpl::getField(1, &info, 24, 1);
  }
  static void
  setMonitorReplicas(Uint32& info, bool val) {
    BitmaskImpl::setField(1, &info, 24, 1, val);
  }
  static bool
  getMonitorAllAttributes(const Uint32& info) {
    return BitmaskImpl::getField(1, &info, 25, 1);
  }
  static void
  setMonitorAllAttributes(Uint32& info, bool val) {
    BitmaskImpl::setField(1, &info, 25, 1, val);
  }
  static bool
  getReportAllMonitoredAttributes(const Uint32& info) {
    return BitmaskImpl::getField(1, &info, 26, 1);
  }
  static void
  setReportAllMonitoredAttributes(Uint32& info, bool val) {
    BitmaskImpl::setField(1, &info, 26, 1, val);
  }

  // convert between Uint32 and struct
  static void
  packTriggerInfo(Uint32& val, const TriggerInfo& str) {
    val = 0;
    setTriggerType(val, str.triggerType);
    setTriggerActionTime(val, str.triggerActionTime);
    setTriggerEvent(val, str.triggerEvent);
    setMonitorReplicas(val, str.monitorReplicas);
    setMonitorAllAttributes(val, str.monitorAllAttributes);
    setReportAllMonitoredAttributes(val, str.reportAllMonitoredAttributes);
  }
  static void
  unpackTriggerInfo(const Uint32& val, TriggerInfo& str) {
    str.triggerType = getTriggerType(val);
    str.triggerActionTime = getTriggerActionTime(val);
    str.triggerEvent = getTriggerEvent(val);
    str.monitorReplicas = getMonitorReplicas(val);
    str.monitorAllAttributes = getMonitorAllAttributes(val);
    str.reportAllMonitoredAttributes = getReportAllMonitoredAttributes(val);
  }

  // for debug print
  static const char*
  triggerTypeName(Uint32 val) {
    switch (val) {
    case TriggerType::SECONDARY_INDEX:
      return "SECONDARY_INDEX";
    case TriggerType::SUBSCRIPTION:
      return "SUBSCRIPTION";
    case TriggerType::READ_ONLY_CONSTRAINT:
      return "READ_ONLY_CONSTRAINT";
    case TriggerType::ORDERED_INDEX:
      return "ORDERED_INDEX";
    case TriggerType::SUBSCRIPTION_BEFORE:
      return "SUBSCRIPTION_BEFORE";
    }
    return "UNKNOWN";
  }
  static const char*
  triggerActionTimeName(Uint32 val) {
    switch (val) {
    case TriggerActionTime::TA_BEFORE:
      return "TA_BEFORE";
    case TriggerActionTime::TA_AFTER:
      return "TA_AFTER";
    case TriggerActionTime::TA_DEFERRED:
      return "TA_DEFERRED";
    case TriggerActionTime::TA_DETACHED:
      return "TA_DETACHED";
    case TriggerActionTime::TA_CUSTOM:
      return "TA_CUSTOM";
    }
    return "UNKNOWN";
  }
  static const char*
  triggerEventName(Uint32 val) {
    switch (val) {
    case TriggerEvent::TE_INSERT:
      return "TE_INSERT";
    case TriggerEvent::TE_DELETE:
      return "TE_DELETE";
    case TriggerEvent::TE_UPDATE:
      return "TE_UPDATE";
    case TriggerEvent::TE_CUSTOM:
      return "TE_CUSTOM";
    }
    return "UNKNOWN";
  }
};

struct NoOfFiredTriggers
{
  STATIC_CONST( DeferredUKBit = (Uint32(1) << 31) );
  STATIC_CONST( DeferredFKBit = (Uint32(1) << 30) );
  STATIC_CONST( DeferredBits = (DeferredUKBit | DeferredFKBit));

  static Uint32 getFiredCount(Uint32 v) {
    return v & ~(Uint32(DeferredBits));
  }
  static Uint32 getDeferredUKBit(Uint32 v) {
    return (v & Uint32(DeferredUKBit)) != 0;
  }
  static void setDeferredUKBit(Uint32 & v) {
    v |= Uint32(DeferredUKBit);
  }
  static Uint32 getDeferredFKBit(Uint32 v) {
    return (v & Uint32(DeferredFKBit)) != 0;
  }
  static void setDeferredFKBit(Uint32 & v) {
    v |= Uint32(DeferredFKBit);
  }

  static bool getDeferredAllSet(Uint32 v) {
    return (v & Uint32(DeferredBits)) == DeferredBits;
  }
};

struct TriggerPreCommitPass
{
  /**
   * When using deferred triggers...
   * - UK are split into 2 passes...
   * - FK needs to be evaluated *after* UK has been processed
   *   as it (can) use UK
   *
   * When having cascadeing FK's they can provoke UK updates
   *   in such cases...the passes are
   *   N * (PASS_MAX + 1) + PASS
   */
  enum
  {
    UK_PASS_0 = 0,
    UK_PASS_1 = 1,
    FK_PASS_0 = 7, // leave some room...(unsure if it's needed)
    TPCP_PASS_MAX = 15
  };
};

#endif
