package com.xsn.explorer.helpers

import com.alexitc.playsonify.core.FutureApplicationResult
import com.xsn.explorer.errors.BlockNotFoundError
import com.xsn.explorer.models.Blockhash
import com.xsn.explorer.models.rpc.Block
import org.scalactic.{Good, One, Or}

import scala.concurrent.Future

class FileBasedXSNService extends DummyXSNService {

  private lazy val blockMap = BlockLoader.all().map { block => block.hash -> block }.toMap

  override def getBlock(blockhash: Blockhash): FutureApplicationResult[Block] = {
    val maybe = blockMap.get(blockhash)
    val result = Or.from(maybe, One(BlockNotFoundError))
    Future.successful(result)
  }

  override def getLatestBlock(): FutureApplicationResult[Block] = {
    val block = blockMap.values.maxBy(_.height.int)
    Future.successful(Good(block))
  }
}