/*
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.apache.org/licenses/LICENSE-2.0
    *
    * Unless required by applicable law or agreed to in writing, software
    * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.basepom.mojo.propertyhelper.fields;
  
  import static java.lang.String.format;
  import static org.basepom.mojo.propertyhelper.IgnoreWarnFail.checkIgnoreWarnFailState;
  
  import org.basepom.mojo.propertyhelper.Field;
  import org.basepom.mojo.propertyhelper.FieldContext;
  import org.basepom.mojo.propertyhelper.ValueProvider;
  import org.basepom.mojo.propertyhelper.definitions.StringDefinition;
  
  import java.util.List;
  import java.util.Optional;
  import java.util.StringJoiner;
  
  import com.google.common.annotations.VisibleForTesting;
  import com.google.common.base.Strings;
  import com.google.common.collect.Lists;
  
  public final class StringField extends Field<String, StringDefinition> {
  
      private final ValueProvider valueProvider;
  
      @VisibleForTesting
      public static StringField forTesting(StringDefinition stringDefinition, ValueProvider valueProvider) {
          return new StringField(stringDefinition, valueProvider, FieldContext.forTesting());
      }
  
      public StringField(final StringDefinition stringDefinition, final ValueProvider valueProvider,
          FieldContext fieldContext) {
          super(stringDefinition, fieldContext);
  
          this.valueProvider = valueProvider;
      }
  
      @Override
      public String getFieldName() {
          // This is not the property name (because many definitions can map onto one prop)
          // but the actual id.
          return fieldDefinition.getId();
      }
  
      @Override
      public String getValue() {
          final List<String> values = Lists.newArrayList();
  
          final Optional<String> propValue = valueProvider.getValue();
          final List<String> definedValues = fieldDefinition.getValues();
  
          // Only add the value from the provider if it is not null.
          propValue.ifPresent(values::add);
  
          values.addAll(definedValues);
  
          for (String value : values) {
              var stringResult = Strings.nullToEmpty(value);
              if (fieldDefinition.isBlankIsValid() || !stringResult.isBlank()) {
                  return formatResult(value);
              }
          }
  
          checkIgnoreWarnFailState(false, fieldDefinition.getOnMissingValue(),
              () -> "",
              () -> format("No value for string field %s found, using an empty value!", getFieldName()));
  
          return "";
      }
  
      @Override
      public String toString() {
          return new StringJoiner(", ", StringField.class.getSimpleName() + "[", "]")
              .add("stringDefinition=" + fieldDefinition)
              .add("valueProvider=" + valueProvider)
              .toString();
      }
  }