/*
 * ToroDB
 * Copyright © 2014 8Kdata Technology (www.8kdata.com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

package com.torodb.mongodb.repl.oplogreplier.analyzed;

import com.eightkdata.mongowp.Status;
import com.eightkdata.mongowp.server.api.oplog.CollectionOplogOperation;
import com.eightkdata.mongowp.server.api.oplog.DeleteOplogOperation;
import com.eightkdata.mongowp.server.api.oplog.InsertOplogOperation;
import com.eightkdata.mongowp.server.api.oplog.UpdateOplogOperation;
import com.torodb.kvdocument.values.KvDocument;
import com.torodb.kvdocument.values.KvValue;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.function.Function;

/**
 *
 */
public class DebuggingAnalyzedOp extends AnalyzedOp {

  private final AnalyzedOp delegate;
  private final List<CollectionOplogOperation> fromOps;

  public DebuggingAnalyzedOp(KvValue<?> mongoDocId) {
    this.delegate = new NoopAnalyzedOp(mongoDocId);
    this.fromOps = Collections.emptyList();
  }

  DebuggingAnalyzedOp(AnalyzedOp delegate, DebuggingAnalyzedOp other,
      CollectionOplogOperation currentOp) {
    this.delegate = delegate;
    this.fromOps = new ArrayList<>(other.fromOps.size() + 1);
    fromOps.addAll(other.fromOps);
    fromOps.add(currentOp);
  }

  @Override
  public AnalyzedOpType getType() {
    return delegate.getType();
  }

  public List<CollectionOplogOperation> getFromOps() {
    return fromOps;
  }

  @Override
  public KvDocument calculateDocToInsert(Function<AnalyzedOp, KvDocument> fetchedDocFun) {
    return delegate.calculateDocToInsert(op -> {
      if (delegate.equals(op)) {
        return fetchedDocFun.apply(this);
      } else {
        return fetchedDocFun.apply(op);
      }
    });
  }

  @Override
  AnalyzedOp andThenInsert(InsertOplogOperation op) {
    return new DebuggingAnalyzedOp(delegate.andThenInsert(op), this, op);
  }

  @Override
  AnalyzedOp andThenUpdateMod(UpdateOplogOperation op) {
    return new DebuggingAnalyzedOp(delegate.andThenUpdateMod(op), this, op);
  }

  @Override
  AnalyzedOp andThenUpdateSet(UpdateOplogOperation op) {
    return new DebuggingAnalyzedOp(delegate.andThenUpdateSet(op), this, op);
  }

  @Override
  AnalyzedOp andThenUpsertMod(UpdateOplogOperation op) {
    return new DebuggingAnalyzedOp(delegate.andThenUpsertMod(op), this, op);
  }

  @Override
  AnalyzedOp andThenUpsertSet(UpdateOplogOperation op) {
    return new DebuggingAnalyzedOp(delegate.andThenUpsertSet(op), this, op);
  }

  @Override
  AnalyzedOp andThenDelete(DeleteOplogOperation op) {
    return new DebuggingAnalyzedOp(delegate.andThenDelete(op), this, op);
  }

  @Override
  public KvValue<?> getMongoDocId() {
    return delegate.getMongoDocId();
  }

  @Override
  public Status<?> getMismatchErrorMessage() throws UnsupportedOperationException {
    return delegate.getMismatchErrorMessage();
  }

  @Override
  public String toString() {
    return delegate.toString() + "(from " + fromOps + ")";
  }

}