import {SLOTS_PER_HISTORICAL_ROOT} from "@lodestar/params";
import {ssz} from "@lodestar/types";
import {getCachedBeaconState} from "../cache/stateCache.js";
import {CachedBeaconStateFulu, CachedBeaconStateGloas} from "../types.js";

/**
 * Upgrade a state from Fulu to Gloas.
 */
export function upgradeStateToGloas(stateFulu: CachedBeaconStateFulu): CachedBeaconStateGloas {
  const {config} = stateFulu;

  ssz.fulu.BeaconState.commitViewDU(stateFulu);
  const stateGloasCloned = stateFulu;

  const stateGloasView = ssz.gloas.BeaconState.defaultViewDU();

  stateGloasView.genesisTime = stateGloasCloned.genesisTime;
  stateGloasView.genesisValidatorsRoot = stateGloasCloned.genesisValidatorsRoot;
  stateGloasView.slot = stateGloasCloned.slot;
  stateGloasView.fork = ssz.phase0.Fork.toViewDU({
    previousVersion: stateFulu.fork.currentVersion,
    currentVersion: config.GLOAS_FORK_VERSION,
    epoch: stateFulu.epochCtx.epoch,
  });
  stateGloasView.latestBlockHeader = stateGloasCloned.latestBlockHeader;
  stateGloasView.blockRoots = stateGloasCloned.blockRoots;
  stateGloasView.stateRoots = stateGloasCloned.stateRoots;
  stateGloasView.historicalRoots = stateGloasCloned.historicalRoots;
  stateGloasView.eth1Data = stateGloasCloned.eth1Data;
  stateGloasView.eth1DataVotes = stateGloasCloned.eth1DataVotes;
  stateGloasView.eth1DepositIndex = stateGloasCloned.eth1DepositIndex;
  stateGloasView.validators = stateGloasCloned.validators;
  stateGloasView.balances = stateGloasCloned.balances;
  stateGloasView.randaoMixes = stateGloasCloned.randaoMixes;
  stateGloasView.slashings = stateGloasCloned.slashings;
  stateGloasView.previousEpochParticipation = stateGloasCloned.previousEpochParticipation;
  stateGloasView.currentEpochParticipation = stateGloasCloned.currentEpochParticipation;
  stateGloasView.justificationBits = stateGloasCloned.justificationBits;
  stateGloasView.previousJustifiedCheckpoint = stateGloasCloned.previousJustifiedCheckpoint;
  stateGloasView.currentJustifiedCheckpoint = stateGloasCloned.currentJustifiedCheckpoint;
  stateGloasView.finalizedCheckpoint = stateGloasCloned.finalizedCheckpoint;
  stateGloasView.inactivityScores = stateGloasCloned.inactivityScores;
  stateGloasView.currentSyncCommittee = stateGloasCloned.currentSyncCommittee;
  stateGloasView.nextSyncCommittee = stateGloasCloned.nextSyncCommittee;
  stateGloasView.latestExecutionPayloadBid.blockHash = stateFulu.latestExecutionPayloadHeader.blockHash;
  stateGloasView.nextWithdrawalIndex = stateGloasCloned.nextWithdrawalIndex;
  stateGloasView.nextWithdrawalValidatorIndex = stateGloasCloned.nextWithdrawalValidatorIndex;
  stateGloasView.historicalSummaries = stateGloasCloned.historicalSummaries;
  stateGloasView.depositRequestsStartIndex = stateGloasCloned.depositRequestsStartIndex;
  stateGloasView.depositBalanceToConsume = stateGloasCloned.depositBalanceToConsume;
  stateGloasView.exitBalanceToConsume = stateGloasCloned.exitBalanceToConsume;
  stateGloasView.earliestExitEpoch = stateGloasCloned.earliestExitEpoch;
  stateGloasView.consolidationBalanceToConsume = stateGloasCloned.consolidationBalanceToConsume;
  stateGloasView.earliestConsolidationEpoch = stateGloasCloned.earliestConsolidationEpoch;
  stateGloasView.pendingDeposits = stateGloasCloned.pendingDeposits;
  stateGloasView.pendingPartialWithdrawals = stateGloasCloned.pendingPartialWithdrawals;
  stateGloasView.pendingConsolidations = stateGloasCloned.pendingConsolidations;
  stateGloasView.proposerLookahead = stateGloasCloned.proposerLookahead;

  for (let i = 0; i < SLOTS_PER_HISTORICAL_ROOT; i++) {
    stateGloasView.executionPayloadAvailability.set(i, true);
  }
  stateGloasView.latestBlockHash = stateFulu.latestExecutionPayloadHeader.blockHash;

  const stateGloas = getCachedBeaconState(stateGloasView, stateFulu);

  stateGloas.commit();
  // Clear cache to ensure the cache of fulu fields is not used by new gloas fields
  // biome-ignore lint/complexity/useLiteralKeys: It is a protected attribute
  stateGloas["clearCache"]();

  return stateGloas;
}