/*
    * #%L
    * wcm.io
    * %%
    * Copyright (C) 2014 wcm.io
    * %%
    * 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.
   * #L%
   */
  package io.wcm.testing.junit.rules.parameterized;
  
  /*
   * (C) 2012 Jens Schauder http://blog.schauderhaft.de/
   * Code initially published here https://github.com/schauder/parameterizedTestsWithRules
   * Slightly simplified for wcm.io.
   */
  import org.junit.runners.model.Statement;
  
  class RepeatedStatement<T> extends Statement {
  
    private final Statement test;
    private final Iterable<T> values;
    private final AccessibleErrorCollector errorCollector;
  
    private final Callback<T> setUpCallback;
    private final Callback<T> tearDownCallback;
  
    RepeatedStatement(final Statement test, final Iterable<T> values,
        final AccessibleErrorCollector errorCollector,
        final Callback<T> setUpCallback, final Callback<T> tearDownCallback) {
      this.test = test;
      this.values = values;
      this.errorCollector = errorCollector;
      this.setUpCallback = setUpCallback;
      this.tearDownCallback = tearDownCallback;
    }
  
    @Override
    // CHECKSTYLE:OFF
    public void evaluate() throws Throwable {
      // CHECKSTYLE:ON
      for (T v : this.values) {
        try {
          if (this.setUpCallback != null) {
            this.setUpCallback.execute(v);
          }
          this.test.evaluate();
        }
        /*CHECKSTYLE:OFF*/ catch (Exception ex) { /*CHECKSTYLE:ON*/
          this.errorCollector.addError(new AssertionError(buildAssertionMessage("For value " + v, ex), ex));
        }
        finally {
          try {
            if (this.tearDownCallback != null) {
              this.tearDownCallback.execute(v);
            }
          }
          /*CHECKSTYLE:OFF*/ catch (Exception ex) { /*CHECKSTYLE:ON*/
            this.errorCollector.addError(new AssertionError(buildAssertionMessage("For value " + v + " (teardown)", ex), ex));
          }
        }
      }
      this.errorCollector.verify();
    }
  
    private static String buildAssertionMessage(String msg, Throwable ex) {
      StringBuilder sb = new StringBuilder()
          .append(msg)
          .append(": ");
      if (ex.getMessage() != null) {
        sb.append(ex.getMessage());
      }
      else {
        sb.append(ex.getClass().getName());
      }
      return sb.toString();
    }
  
  }