/*
    * Copyright (C) 2012 Jean-Christophe Gay (contact@jeanchristophegay.com)
    *
    * 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.codehaus.mojo.buildplan;
  
  import static java.util.Collections.emptyList;
  import static java.util.Collections.emptyMap;
  import static org.codehaus.mojo.buildplan.display.Output.lineSeparator;
  
  import java.util.Collection;
  import java.util.Map;
  import org.apache.maven.lifecycle.Lifecycle;
  import org.apache.maven.plugin.MojoExecution;
  import org.apache.maven.plugin.MojoFailureException;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.codehaus.mojo.buildplan.display.ListPhaseTableDescriptor;
  import org.codehaus.mojo.buildplan.display.MojoExecutionDisplay;
  import org.codehaus.mojo.buildplan.display.TableDescriptor;
  import org.codehaus.mojo.buildplan.util.Multimap;
  import org.codehaus.plexus.util.StringUtils;
  
  /** List plugin executions by phase for the current project. */
  @Mojo(name = "list-phase", threadSafe = true)
  public class ListPhaseMojo extends AbstractLifecycleMojo {
  
      /** Display plugin executions only for the specified phase. */
      @Parameter(property = "buildplan.phase")
      private String phase;
  
      /** Will show in which lifecycle a phase was defined (if any) */
      @Parameter(property = "buildplan.showLifecycles", defaultValue = "false")
      private boolean showLifecycles;
  
      /** Will print all phases, even if no mapping to an execution is available */
      @Parameter(property = "buildplan.showAllPhases", defaultValue = "false")
      private boolean showAllPhases;
  
      public void executeInternal() throws MojoFailureException {
          Groups.Options options = new Groups.Options(defaultLifecycles);
          if (showAllPhases) {
              options = options.showingAllPhases();
          }
          if (showLifecycles) {
              options = options.showingLifecycles();
          }
  
          Multimap<String, MojoExecution> phases =
                  Groups.ByPhase.of(calculateExecutionPlan().getMojoExecutions(), options);
  
          if (!phases.isEmpty()) {
              TableDescriptor descriptor = ListPhaseTableDescriptor.of(phases.values(), defaultLifecycles);
              Lifecycle currentLifecycle = null;
              StringBuilder output = new StringBuilder();
              for (Map.Entry<String, Collection<MojoExecution>> currentPhase :
                      phases.asMap().entrySet()) {
                  if (showLifecycles) {
                      Lifecycle lifecycleForPhase = defaultLifecycles.get(currentPhase.getKey());
                      if (lifecycleForPhase == null) {
                          lifecycleForPhase = new Lifecycle("", emptyList(), emptyMap());
                      }
                      if (!lifecycleForPhase.equals(currentLifecycle)) {
                          currentLifecycle = lifecycleForPhase;
                          output.append(lineSeparator())
                                  .append(lineSeparator())
                                  .append("[")
                                  .append(currentLifecycle.getId())
                                  .append("]");
                      }
                  }
                  output.append(lineSeparator()).append(phaseTitleLine(descriptor, currentPhase.getKey()));
                  currentPhase.getValue().stream()
                          .filter(execution -> execution != NoMojoExecution.INSTANCE)
                          .forEach(execution ->
                                  output.append(lineSeparator()).append(line(descriptor.rowFormat(), execution)));
              }
              handleOutput(output.toString());
          } else {
              getLog().warn("No plugin execution found within phase: " + phase);
          }
      }
  
      private String line(String rowFormat, MojoExecution execution) {
          MojoExecutionDisplay display = new MojoExecutionDisplay(execution);
  
          return String.format(rowFormat, display.getArtifactId(), display.getGoal(), display.getExecutionId());
      }
 
     private String phaseTitleLine(TableDescriptor descriptor, String key) {
         return key + " " + StringUtils.repeat("-", descriptor.width() - key.length());
     }
 }