/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.tracker.imports.validation.validator.enrollment;

import static org.hisp.dhis.tracker.imports.validation.ValidationCode.E1014;
import static org.hisp.dhis.tracker.imports.validation.ValidationCode.E1022;
import static org.hisp.dhis.tracker.imports.validation.ValidationCode.E1041;

import java.util.List;
import java.util.Map;
import org.hisp.dhis.organisationunit.OrganisationUnit;
import org.hisp.dhis.program.Program;
import org.hisp.dhis.trackedentity.TrackedEntity;
import org.hisp.dhis.tracker.imports.bundle.TrackerBundle;
import org.hisp.dhis.tracker.imports.domain.Enrollment;
import org.hisp.dhis.tracker.imports.preheat.TrackerPreheat;
import org.hisp.dhis.tracker.imports.validation.Reporter;
import org.hisp.dhis.tracker.imports.validation.Validator;

/**
 * @author Morten Svanæs <msvanaes@dhis2.org>
 */
class DataRelationsValidator implements Validator<Enrollment> {
  @Override
  public void validate(Reporter reporter, TrackerBundle bundle, Enrollment enrollment) {
    Program program = bundle.getPreheat().getProgram(enrollment.getProgram());
    OrganisationUnit organisationUnit =
        bundle.getPreheat().getOrganisationUnit(enrollment.getOrgUnit());

    reporter.addErrorIf(() -> !program.isRegistration(), enrollment, E1014, program);

    TrackerPreheat preheat = bundle.getPreheat();
    if (programDoesNotHaveOrgUnit(program, organisationUnit, preheat.getProgramWithOrgUnitsMap())) {
      reporter.addError(enrollment, E1041, organisationUnit, program);
    }

    validateTrackedEntityTypeMatchesPrograms(reporter, bundle, program, enrollment);
  }

  private boolean programDoesNotHaveOrgUnit(
      Program program, OrganisationUnit orgUnit, Map<String, List<String>> programAndOrgUnitsMap) {
    return !programAndOrgUnitsMap.containsKey(program.getUid())
        || !programAndOrgUnitsMap.get(program.getUid()).contains(orgUnit.getUid());
  }

  private void validateTrackedEntityTypeMatchesPrograms(
      Reporter reporter, TrackerBundle bundle, Program program, Enrollment enrollment) {

    if (program.getTrackedEntityType() == null) {
      return;
    }

    if (!trackedEntityTypesMatch(bundle, program, enrollment)) {
      reporter.addError(enrollment, E1022, enrollment.getTrackedEntity(), program);
    }
  }

  private boolean trackedEntityTypesMatch(
      TrackerBundle bundle, Program program, Enrollment enrollment) {
    final TrackedEntity trackedEntity =
        bundle.getPreheat().getTrackedEntity(enrollment.getTrackedEntity());
    if (trackedEntity != null) {
      return program
          .getTrackedEntityType()
          .getUid()
          .equals(trackedEntity.getTrackedEntityType().getUid());
    }

    return bundle
        .findTrackedEntityByUid(enrollment.getTrackedEntity())
        .map(te -> te.getTrackedEntityType().isEqualTo(program.getTrackedEntityType()))
        .orElse(false);
  }
}
