import json

import base
import signal_type

type MailserverRequestCompletedSignal* = ref object of Signal
  requestID*: string
  lastEnvelopeHash*: string
  cursor*: string
  errorMessage*: string
  error*: bool
  
type MailserverRequestExpiredSignal* = ref object of Signal
  # TODO

type HistoryRequestStartedSignal* = ref object of Signal
  requestId*: string
  numBatches*: int

type HistoryRequestBatchProcessedSignal* = ref object of Signal
  requestId*: string
  batchIndex*: int
  numBatches*: int

type HistoryRequestCompletedSignal* = ref object of Signal
  requestId*: string

type HistoryRequestFailedSignal* = ref object of Signal
  requestId*: string
  errorMessage*: string
  error*: bool

proc fromEvent*(T: type MailserverRequestCompletedSignal, jsonSignal: JsonNode): MailserverRequestCompletedSignal = 
  result = MailserverRequestCompletedSignal()
  result.signalType = SignalType.MailserverRequestCompleted
  if jsonSignal["event"].kind != JNull:
    result.requestID = jsonSignal["event"]{"requestID"}.getStr()
    result.lastEnvelopeHash = jsonSignal["event"]{"lastEnvelopeHash"}.getStr()
    result.cursor = jsonSignal["event"]{"cursor"}.getStr()
    result.errorMessage = jsonSignal["event"]{"errorMessage"}.getStr()
    result.error = result.errorMessage != ""
  
proc fromEvent*(T: type MailserverRequestExpiredSignal, jsonSignal: JsonNode): MailserverRequestExpiredSignal = 
  # TODO: parse signal
  result = MailserverRequestExpiredSignal()
  result.signalType = SignalType.MailserverRequestExpired

proc fromEvent*(T: type HistoryRequestStartedSignal, jsonSignal: JsonNode): HistoryRequestStartedSignal = 
  result = HistoryRequestStartedSignal()
  result.signalType = SignalType.HistoryRequestStarted
  result.requestId = jsonSignal["event"]{"requestId"}.getStr()
  result.numBatches = jsonSIgnal["event"]{"numBatches"}.getInt()

proc fromEvent*(T: type HistoryRequestBatchProcessedSignal, jsonSignal: JsonNode): HistoryRequestBatchProcessedSignal = 
  result = HistoryRequestBatchProcessedSignal()
  result.signalType = SignalType.HistoryRequestBatchProcessed
  result.requestId = jsonSignal["event"]{"requestId"}.getStr()
  result.batchIndex = jsonSIgnal["event"]{"batchIndex"}.getInt()
  result.numBatches = jsonSIgnal["event"]{"numBatches"}.getInt()

proc fromEvent*(T: type HistoryRequestCompletedSignal, jsonSignal: JsonNode): HistoryRequestCompletedSignal = 
  result = HistoryRequestCompletedSignal()
  result.signalType = SignalType.HistoryRequestCompleted
  result.requestId = jsonSignal["event"]{"requestId"}.getStr()

proc fromEvent*(T: type HistoryRequestFailedSignal, jsonSignal: JsonNode): HistoryRequestFailedSignal = 
  result = HistoryRequestFailedSignal()
  result.signalType = SignalType.HistoryRequestStarted
  result.requestId = jsonSignal["event"]{"requestId"}.getStr()
  if jsonSignal["event"].kind != JNull:
    result.errorMessage = jsonSignal["event"]{"errorMessage"}.getStr()
    result.error = result.errorMessage != ""