@CheckForNull
  private static RuleDebt toRuleDebt(RuleDto rule, DebtModel debtModel) {
    RuleDebt ruleDebt =
        new RuleDebt().setRuleKey(RuleKey.of(rule.getRepositoryKey(), rule.getRuleKey()));
    Integer effectiveSubCharacteristicId =
        rule.getSubCharacteristicId() != null
            ? rule.getSubCharacteristicId()
            : rule.getDefaultSubCharacteristicId();
    DebtCharacteristic subCharacteristic =
        (effectiveSubCharacteristicId != null
                && !RuleDto.DISABLED_CHARACTERISTIC_ID.equals(effectiveSubCharacteristicId))
            ? debtModel.characteristicById(effectiveSubCharacteristicId)
            : null;
    if (subCharacteristic != null) {
      ruleDebt.setSubCharacteristicKey(subCharacteristic.key());

      String overriddenFunction = rule.getRemediationFunction();
      String defaultFunction = rule.getDefaultRemediationFunction();
      if (overriddenFunction != null) {
        ruleDebt.setFunction(overriddenFunction);
        ruleDebt.setCoefficient(rule.getRemediationCoefficient());
        ruleDebt.setOffset(rule.getRemediationOffset());
        return ruleDebt;
      } else if (defaultFunction != null) {
        ruleDebt.setFunction(defaultFunction);
        ruleDebt.setCoefficient(rule.getDefaultRemediationCoefficient());
        ruleDebt.setOffset(rule.getDefaultRemediationOffset());
        return ruleDebt;
      }
    }
    return null;
  }
  private void restoreRules(
      List<CharacteristicDto> allCharacteristicDtos,
      List<RuleDto> rules,
      List<RuleDebt> ruleDebts,
      ValidationMessages validationMessages,
      Date updateDate,
      DbSession session) {
    for (RuleDto rule : rules) {
      RuleDebt ruleDebt = ruleDebt(rule.getRepositoryKey(), rule.getRuleKey(), ruleDebts);
      String subCharacteristicKey = ruleDebt != null ? ruleDebt.subCharacteristicKey() : null;
      CharacteristicDto subCharacteristicDto =
          subCharacteristicKey != null
              ? characteristicByKey(ruleDebt.subCharacteristicKey(), allCharacteristicDtos, true)
              : null;
      ruleOperations.updateRule(
          rule,
          subCharacteristicDto,
          ruleDebt != null ? ruleDebt.function() : null,
          ruleDebt != null ? ruleDebt.coefficient() : null,
          ruleDebt != null ? ruleDebt.offset() : null,
          session);
      rule.setUpdatedAt(updateDate);
      ruleDebts.remove(ruleDebt);
    }

    for (RuleDebt ruleDebt : ruleDebts) {
      validationMessages.addWarningText(
          String.format("The rule '%s' does not exist.", ruleDebt.ruleKey()));
    }
  }
  @Test
  public void backup_from_language() {
    when(dao.selectEnabledCharacteristics(session))
        .thenReturn(
            newArrayList(
                new CharacteristicDto()
                    .setId(1)
                    .setKey("PORTABILITY")
                    .setName("Portability updated")
                    .setOrder(2),
                new CharacteristicDto()
                    .setId(2)
                    .setKey("COMPILER")
                    .setName("Compiler updated")
                    .setParentId(1)));

    when(ruleDao.selectEnabledAndNonManual(session))
        .thenReturn(
            newArrayList(
                new RuleDto()
                    .setId(1)
                    .setRepositoryKey("squid")
                    .setRuleKey("UselessImportCheck")
                    .setLanguage("java")
                    .setSubCharacteristicId(2)
                    .setRemediationFunction(DebtRemediationFunction.Type.CONSTANT_ISSUE.toString())
                    .setRemediationOffset("15min"),
                //        .setCreatedAt(oldDate).setUpdatedAt(oldDate),
                // Should be ignored
                new RuleDto()
                    .setId(2)
                    .setRepositoryKey("checkstyle")
                    .setLanguage("java2")
                    .setSubCharacteristicId(3)
                    .setRemediationFunction(DebtRemediationFunction.Type.LINEAR.toString())
                    .setRemediationCoefficient("2h")
                //        .setCreatedAt(oldDate).setUpdatedAt(oldDate)
                ));

    debtModelBackup.backup("java");

    verify(debtModelXMLExporter).export(any(DebtModel.class), ruleDebtListCaptor.capture());

    List<RuleDebt> rules = ruleDebtListCaptor.getValue();
    assertThat(rules).hasSize(1);

    RuleDebt rule = rules.get(0);
    assertThat(rule.ruleKey().repository()).isEqualTo("squid");
    assertThat(rule.ruleKey().rule()).isEqualTo("UselessImportCheck");
    assertThat(rule.subCharacteristicKey()).isEqualTo("COMPILER");
    assertThat(rule.function()).isEqualTo("CONSTANT_ISSUE");
    assertThat(rule.coefficient()).isNull();
    assertThat(rule.offset()).isEqualTo("15min");
  }
  @Test
  public void backup_with_rule_having_default_linear_and_overridden_offset() {
    when(dao.selectEnabledCharacteristics(session))
        .thenReturn(
            newArrayList(
                new CharacteristicDto()
                    .setId(1)
                    .setKey("PORTABILITY")
                    .setName("Portability updated")
                    .setOrder(2),
                new CharacteristicDto()
                    .setId(2)
                    .setKey("COMPILER")
                    .setName("Compiler updated")
                    .setParentId(1)));

    when(ruleDao.selectEnabledAndNonManual(session))
        .thenReturn(
            newArrayList(
                // Rule with default debt values : default value is linear (only coefficient is set)
                // and overridden value is constant per issue (only offset is set)
                // -> Ony offset should be set
                new RuleDto()
                    .setRepositoryKey("squid")
                    .setRuleKey("AvoidNPE")
                    .setDefaultSubCharacteristicId(2)
                    .setDefaultRemediationFunction(DebtRemediationFunction.Type.LINEAR.toString())
                    .setDefaultRemediationCoefficient("2h")
                    .setSubCharacteristicId(2)
                    .setRemediationFunction(DebtRemediationFunction.Type.CONSTANT_ISSUE.toString())
                    .setRemediationOffset("15min")));

    debtModelBackup.backup();

    ArgumentCaptor<DebtModel> debtModelArgument = ArgumentCaptor.forClass(DebtModel.class);
    verify(debtModelXMLExporter).export(debtModelArgument.capture(), ruleDebtListCaptor.capture());
    assertThat(debtModelArgument.getValue().rootCharacteristics()).hasSize(1);
    assertThat(debtModelArgument.getValue().subCharacteristics("PORTABILITY")).hasSize(1);

    List<RuleDebt> rules = ruleDebtListCaptor.getValue();
    assertThat(rules).hasSize(1);

    RuleDebt rule = rules.get(0);
    assertThat(rule.ruleKey().repository()).isEqualTo("squid");
    assertThat(rule.ruleKey().rule()).isEqualTo("AvoidNPE");
    assertThat(rule.subCharacteristicKey()).isEqualTo("COMPILER");
    assertThat(rule.function()).isEqualTo("CONSTANT_ISSUE");
    assertThat(rule.offset()).isEqualTo("15min");
    assertThat(rule.coefficient()).isNull();
  }
  @Test
  public void backup() {
    when(dao.selectEnabledCharacteristics(session))
        .thenReturn(
            newArrayList(
                new CharacteristicDto()
                    .setId(1)
                    .setKey("PORTABILITY")
                    .setName("Portability updated")
                    .setOrder(2),
                new CharacteristicDto()
                    .setId(2)
                    .setKey("COMPILER")
                    .setName("Compiler updated")
                    .setParentId(1)));

    when(ruleDao.selectEnabledAndNonManual(session))
        .thenReturn(
            newArrayList(
                // Rule with overridden debt values
                new RuleDto()
                    .setRepositoryKey("squid")
                    .setRuleKey("UselessImportCheck")
                    .setSubCharacteristicId(2)
                    .setRemediationFunction(DebtRemediationFunction.Type.LINEAR_OFFSET.toString())
                    .setRemediationCoefficient("2h")
                    .setRemediationOffset("15min"),

                // Rule with default debt values
                new RuleDto()
                    .setRepositoryKey("squid")
                    .setRuleKey("AvoidNPE")
                    .setDefaultSubCharacteristicId(2)
                    .setDefaultRemediationFunction("LINEAR")
                    .setDefaultRemediationCoefficient("2h")));

    debtModelBackup.backup();

    ArgumentCaptor<DebtModel> debtModelArgument = ArgumentCaptor.forClass(DebtModel.class);
    verify(debtModelXMLExporter).export(debtModelArgument.capture(), ruleDebtListCaptor.capture());
    assertThat(debtModelArgument.getValue().rootCharacteristics()).hasSize(1);
    assertThat(debtModelArgument.getValue().subCharacteristics("PORTABILITY")).hasSize(1);

    List<RuleDebt> rules = ruleDebtListCaptor.getValue();
    assertThat(rules).hasSize(2);

    RuleDebt rule = rules.get(0);
    assertThat(rule.ruleKey().repository()).isEqualTo("squid");
    assertThat(rule.ruleKey().rule()).isEqualTo("UselessImportCheck");
    assertThat(rule.subCharacteristicKey()).isEqualTo("COMPILER");
    assertThat(rule.function()).isEqualTo("LINEAR_OFFSET");
    assertThat(rule.coefficient()).isEqualTo("2h");
    assertThat(rule.offset()).isEqualTo("15min");

    rule = rules.get(1);
    assertThat(rule.ruleKey().repository()).isEqualTo("squid");
    assertThat(rule.ruleKey().rule()).isEqualTo("AvoidNPE");
    assertThat(rule.subCharacteristicKey()).isEqualTo("COMPILER");
    assertThat(rule.function()).isEqualTo("LINEAR");
    assertThat(rule.coefficient()).isEqualTo("2h");
    assertThat(rule.offset()).isNull();
  }