# nim-raft
# Copyright (c) 2023 Status Research & Development GmbH
# Licensed under either of
#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
#  * MIT license ([LICENSE-MIT](LICENSE-MIT))
# at your option.
# This file may not be copied, modified, or distributed except according to
# those terms.

import types
import protocol
import consensus_module

export types, protocol

# Raft Node Public API procedures / functions
proc RaftNodeCreateNew*[SmCommandType, SmStateType](                     # Create New Raft Node
                  id: RaftNodeId, peers: RaftNodePeers,
                  persistentStorage: RaftNodePersistentStorage,
                  msgSendCallback: RaftMessageSendCallback): RaftNode[SmCommandType, SmStateType] =
  discard

proc RaftNodeLoad*[SmCommandType, SmStateType](
                  persistentStorage: RaftNodePersistentStorage,            # Load Raft Node From Storage
                  msgSendCallback: RaftMessageSendCallback): Result[RaftNode[SmCommandType, SmStateType], string] =
  discard

proc RaftNodeStop*[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType]) =
  discard

proc RaftNodeStart*[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType]) =
  discard

func RaftNodeIdGet*[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType]): RaftNodeId =                   # Get Raft Node ID
  discard

func RaftNodeStateGet*[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType]): RaftNodeState =             # Get Raft Node State
    discard

func RaftNodeTermGet*[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType]): RaftNodeTerm =               # Get Raft Node Term
  discard

func RaftNodePeersGet*[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType]): RaftNodePeers =             # Get Raft Node Peers
  discard

func RaftNodeIsLeader*[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType]): bool =                      # Check if Raft Node is Leader
  discard

# Deliver Raft Message to the Raft Node and dispatch it
proc RaftNodeMessageDeliver*[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType], raftMessage: RaftMessageBase): RaftMessageResponseBase =
  discard

# Process RaftNodeClientRequests
proc RaftNodeClientRequest*[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType], req: RaftNodeClientRequest[SmCommandType]): RaftNodeClientResponse[SmStateType] =
  discard

proc RaftNodeLogIndexGet*[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType]): RaftLogIndex =
  discard

proc RaftNodeLogEntryGet*[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType], logIndex: RaftLogIndex): Result[RaftNodeLogEntry[SmCommandType], string] =
  discard

# Abstract State Machine Ops
func RaftNodeSmStateGet*[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType]): SmStateType =
  node.stateMachine.state

proc RaftNodeSmInit[SmCommandType, SmStateType](stateMachine: var RaftNodeStateMachine[SmCommandType, SmStateType]) =
  mixin RaftSmInit
  RaftSmInit(stateMachine)

proc RaftNodeSmApply[SmCommandType, SmStateType](stateMachine: RaftNodeStateMachine[SmCommandType, SmStateType], command: SmCommandType) =
  mixin RaftSmApply
  RaftSmApply(stateMachine, command)

# Private Abstract Timer manipulation Ops
proc RaftTimerCreate[TimerDurationType](timerInterval: TimerDurationType, timer_callback: RaftTimerCallback): TimerId =   # I guess Duration should be monotonic
  mixin RaftTimerCreateCustomImpl
  RaftTimerCreateCustomImpl(timerInterval, timer_callback)

template RaftTimerCancel(TimerId) =
  mixin RaftTimerCancelCustomImpl
  RaftTimerCancelCustomImpl(TimerId)

template RaftTimerIsExpired(TimerId): bool =
  mixin RaftTimerIsExpiredImpl
  RaftTimerIsExpiredImpl(TimerId)

# Private Log Ops
proc RaftNodeLogAppend[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType], logEntry: RaftNodeLogEntry[SmCommandType]) =
  discard

proc RaftNodeLastLogIndex[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType]): uint64 =
  discard

proc RaftNodeLogTruncate[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType], truncateIndex: uint64) =
  discard

# Private Timers Create Ops
proc RaftNodeScheduleHeartBeat[SmCommandType, SmStateType, TimerDurationType](node: RaftNode[SmCommandType, SmStateType]): TimerId =
  discard

proc RaftNodeScheduleHeartBeatTimeout[SmCommandType, SmStateType, TimerDurationType](node: RaftNode[SmCommandType, SmStateType]): TimerId =
  discard

proc scheduleElectionTimeOut[SmCommandType, SmStateType, TimerDurationType](node: RaftNode[SmCommandType, SmStateType]): TimerId =
  discard

proc scheduleRequestVoteTimeout[SmCommandType, SmStateType, TimerDurationType](node: RaftNode[SmCommandType, SmStateType]): TimerId =
  discard

proc RaftNodeHeartBeatTimeout[SmCommandType, SmStateType](node: RaftNode[SmCommandType, SmStateType]) =
  discard