package com.atlassian.plugin;
   
   import com.atlassian.plugin.event.impl.DefaultPluginEventManager;
   import com.atlassian.plugin.impl.StaticPlugin;
   import com.atlassian.plugin.loaders.PluginLoader;
   import com.atlassian.plugin.manager.store.MemoryPluginPersistentStateStore;
   import static org.mockito.Mockito.*;
   
   import com.google.common.collect.ImmutableList;
  import junit.framework.TestCase;
  import org.apache.log4j.Level;
  import org.apache.log4j.Logger;
  import org.mockito.Mockito;
  
  import java.util.ArrayList;
  import java.util.Collection;
  
  /**
   * Tests that the plugin manager properly notifies StateAware plugin modules of state
   * transitions.
   */
  public class TestStateAware extends TestCase
  {
      private Combination mockEnabling;
      private Combination mockDisabled;
      private ModuleDescriptor mockThwarted;
      private com.atlassian.plugin.manager.DefaultPluginManager manager;
      private Plugin plugin1;
  
      interface Combination extends StateAware, ModuleDescriptor{};
  
      protected void setUp() throws Exception
      {
      	// FIXME - the next line is here to prevent a null pointer exception caused by a debug logging
      	// a variable in the lifecycle is not initialized, which is fine for testing, but a debug logging causes an NPE
      	
      	Logger.getRootLogger().setLevel(Level.INFO);
          mockEnabling = makeMockModule(Combination.class, "key1", "enabling", true);
          mockDisabled = makeMockModule(Combination.class, "key1", "disabled", false);
          mockThwarted = makeMockModule(ModuleDescriptor.class, "key1", "thwarted", true);
  
          plugin1 = new StaticPlugin();
          plugin1.setPluginInformation(new PluginInformation());
          plugin1.setKey("key1");
          plugin1.enable();
  
          PluginLoader pluginLoader = setupPluginLoader(plugin1);
          ArrayList pluginLoaders = new ArrayList();
          pluginLoaders.add(pluginLoader);
  
          ModuleDescriptorFactory moduleDescriptorFactory = mock(ModuleDescriptorFactory.class);
  
          manager = new com.atlassian.plugin.manager.DefaultPluginManager(new MemoryPluginPersistentStateStore(), pluginLoaders, moduleDescriptorFactory, new DefaultPluginEventManager());
  
      }
  
      /**
       * Any StateAware plugin module that is active when the plugin manager is initialised should
       * recieve an enabled message
       */
      public void testStateAwareOnInit() throws PluginParseException
      {
          plugin1.addModuleDescriptor(mockEnabling);
          plugin1.addModuleDescriptor(mockThwarted);
          plugin1.addModuleDescriptor(mockDisabled);
          manager.init();
          verify(mockEnabling).enabled();
      }
  
      /**
       * Any StateAware plugin moudle that is explicitly enabled or disabled through the plugin manager
       * should receive the appropriate message
       */
      public void testStateAwareOnPluginModule() throws PluginParseException
      {
          plugin1.addModuleDescriptor(mockDisabled);
          manager.init();
  
          when(mockDisabled.satisfiesMinJavaVersion()).thenReturn(true);
          manager.enablePluginModule(mockDisabled.getCompleteKey());
          verify(mockDisabled).enabled();
  
          manager.disablePluginModule(mockDisabled.getCompleteKey());
          verify(mockDisabled).disabled();
      }
  
      /**
       * If a plugin is disabled, any modules that are currently enabled should be sent the disabled
       * message
       */
      public void testStateAwareOnPluginDisable() throws PluginParseException
      {
          plugin1.addModuleDescriptor(mockEnabling);
          plugin1.addModuleDescriptor(mockDisabled);
  
          manager.init();
          verify(mockEnabling).enabled();
  
          manager.disablePlugin(plugin1.getKey());
         verify(mockEnabling).disabled();
     }
 
     /**
      * If a plugin is enabled, any modules that are currently enabled should be sent the enabled
      * message, but modules which are disabled should not.
      */
     public void testDisabledModuleDescriptorsAreEnabled() throws PluginParseException
     {
         plugin1.addModuleDescriptor(mockEnabling);
         plugin1.addModuleDescriptor(mockDisabled);
         plugin1.setEnabledByDefault(false);
 
         manager.init();
 
         manager.enablePlugin(plugin1.getKey());
         verify(mockEnabling).enabled();
     }
 
     private <T extends ModuleDescriptor> T makeMockModule(Class<T> moduleClass, String pluginKey, String moduleKey, boolean enabledByDefault)
     {
         ModuleDescriptor mock = Mockito.mock(moduleClass);
         when(mock.getKey()).thenReturn(moduleKey);
         when(mock.getCompleteKey()).thenReturn(pluginKey + ":" + moduleKey);
         when(mock.isEnabledByDefault()).thenReturn(enabledByDefault);
         return (T) mock;
     }
 
     private PluginLoader setupPluginLoader(final Plugin plugin1)
     {
         final PluginLoader pluginLoader = new PluginLoader() //TODO: should this deployer support removal and addition?
         {
             public Iterable<Plugin> loadAllPlugins(ModuleDescriptorFactory moduleDescriptorFactory) throws PluginParseException
             {
                 return ImmutableList.of(plugin1);
             }
 
             public boolean supportsAddition()
             {
                 return false;
             }
 
             public boolean supportsRemoval()
             {
                 return false;
             }
 
             public Collection removeMissingPlugins()
             {
                 return null;
             }
 
             public Iterable<Plugin> loadFoundPlugins(ModuleDescriptorFactory moduleDescriptorFactory)
             {
                 return null;
             }
 
             @Override
             public boolean isDynamicPluginLoader()
             {
                 return false;
             }
 
             public void removePlugin(Plugin plugin) throws PluginException
             {
                 throw new PluginException("This PluginLoader does not support removal");
             }
         };
         return pluginLoader;
     }
 }