/*
 * RiskScape™ Copyright New Zealand Institute for Earth Science Limited
 * (Earth Sciences New Zealand) is distributed for research purposes only
 * under the terms of AGPLv3.
 *
 * RiskScape™ Copyright 2026 New Zealand Institute for Earth Science
 * Limited (Earth Sciences New Zealand). All rights reserved. Source code
 * available under the AGPLv3.
 * 
 * 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 for RESEARCH PURPOSES ONLY, in the hope that it will
 * be useful for research and education initiatives.
 * 
 * If you are not a researcher, or you are a researcher who wishes to use this
 * program on terms other than AGPLv3 (including those who wish to restrict the
 * distribution of any source code created using this program), please contact:
 * https://riskscape.org.nz
 * 
 * This program is distributed 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/>.
 * 
 * By way of summary only, under the AGPLv3:
 *     • Permissions of this strongest copyleft license are conditioned
 *       on making available complete source code of licensed works and
 *       modifications, which include larger works using a licensed work,
 *       under the same license.
 *     • Copyright and license notices must be preserved.
 *     • Contributors provide an express grant of patent rights.
 *     • When a modified version is used to provide a service over a
 *       network, the complete source code of the modified version must be made
 *       available.
 */
package nz.org.riskscape.engine.bind.impl;

import java.util.Arrays;
import java.util.List;

import com.google.common.collect.ImmutableList;

import nz.org.riskscape.engine.bind.BindingContext;
import nz.org.riskscape.engine.bind.TypeSafeBinder;
import nz.org.riskscape.engine.problem.GeneralProblems;
import nz.org.riskscape.problem.ResultOrProblems;

public class BooleanBinder extends TypeSafeBinder<Object, Boolean> {

  public BooleanBinder() {
    super(Object.class, Boolean.class);
  }

  public static final List<String> TRUE_OPTIONS = Arrays.asList(
    "yes",
    "y",
    "t",
    "true",
    "1"
  );

  public static final List<String> FALSE_OPTIONS = Arrays.asList(
    "no",
    "n",
    "false",
    "f",
    "0"
  );

  private static final List<?> ALL_OPTIONS = ImmutableList.builder().addAll(TRUE_OPTIONS).addAll(FALSE_OPTIONS).build();

  @Override
  protected ResultOrProblems<Boolean> bindTypedValue(BindingContext context, Object objValue) {
    return bindValue(objValue);
  }

  public ResultOrProblems<Boolean> bindValue(Object objValue) {
    String value = objValue.toString().toLowerCase();

    if (TRUE_OPTIONS.contains(value)) {
      return ResultOrProblems.of(true);
    } else if (FALSE_OPTIONS.contains(value)) {
      return ResultOrProblems.of(false);
    }

    return ResultOrProblems.failed(GeneralProblems.get().notAnOption(value, Boolean.class, ALL_OPTIONS));
  }

}
