/*
 * Copyright 2012 JBoss by Red Hat.
 *
 * 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.jbpm.services.task;

import static org.junit.Assert.assertEquals;

import java.io.StringReader;
import java.util.HashMap;
import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Query;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

import org.jbpm.services.task.impl.factories.TaskFactory;
import org.jbpm.services.task.impl.model.TaskImpl;
import org.junit.Assume;
import org.junit.Test;
import org.kie.api.task.model.Status;
import org.kie.api.task.model.Task;

import bitronix.tm.TransactionManagerServices;

/**
 *
 */
public abstract class SubTasksBaseTest extends HumanTaskServicesBaseTest{
   
    public abstract EntityManagerFactory getEmf();
    
    @Test
    public void noActionStrategy() throws Exception {

  
         // One potential owner, should go straight to state Reserved
        String parentTaskstr = "(with (new Task()) { priority = 55, taskData = (with( new TaskData()) { } ), ";
        parentTaskstr += "peopleAssignments = (with ( new PeopleAssignments() ) { potentialOwners = [new User('salaboy')  ],businessAdministrators = [ new User('Administrator') ], }),";
        parentTaskstr += "names = [ new I18NText( 'en-UK', 'This is my task Parent name')] })";
        // By default the task will contain a SubTask SubTasksStrategy.NoAction

        Task parentTask = TaskFactory.evalTask(new StringReader(parentTaskstr));
        taskService.addTask(parentTask, new HashMap<String, Object>());

        long taskParentId = parentTask.getId();

        // Task should remain in Created state with no actual owner

        Task parentTask1 = taskService.getTaskById(taskParentId);
        assertEquals(parentTask1.getTaskData().getStatus(), Status.Reserved);
        
        taskService.start(taskParentId, "salaboy");
        
        String child1Taskstr = "(with (new Task()) { priority = 55,  taskData = (with( new TaskData()) { parentId= "+taskParentId+" } ), ";
        child1Taskstr += "peopleAssignments = (with ( new PeopleAssignments() ) { potentialOwners = [new User('Darth Vader')  ],businessAdministrators = [ new User('Administrator') ], }),";
        child1Taskstr += "names = [ new I18NText( 'en-UK', 'This is my task Child 1 name')] })";

        Task child1Task = TaskFactory.evalTask(new StringReader(child1Taskstr));
        taskService.addTask(child1Task, new HashMap<String, Object>());

        long child1TaskId = child1Task.getId();

        //Test if the task is succesfully created
        
        assertEquals(1, taskService.getPendingSubTasksByParent(taskParentId));
        
        Task childTask1 = taskService.getTaskById(child1TaskId);
        
        assertEquals(taskParentId, childTask1.getTaskData().getParentId());
        
        taskService.start(child1TaskId, "Darth Vader");
        
        taskService.complete(child1TaskId, "Darth Vader", null);
        
        childTask1 = taskService.getTaskById(child1TaskId);
        
        assertEquals(Status.Completed, childTask1.getTaskData().getStatus());
        
        parentTask1 = taskService.getTaskById(taskParentId);
        
        
        assertEquals(Status.InProgress, parentTask1.getTaskData().getStatus() );
        
        assertEquals(0, taskService.getPendingSubTasksByParent(taskParentId));
        
        taskService.complete(taskParentId, "salaboy", null);
        
        parentTask1 = taskService.getTaskById(taskParentId);
        
        assertEquals(Status.Completed, parentTask1.getTaskData().getStatus() );
        
    }
    
    @Test
    public void onSubtaskCompletionAutoCompleteParentStrategy() throws Exception {

  
         // One potential owner, should go straight to state Reserved
        String parentTaskstr = "(with (new Task()) { subTaskStrategy = SubTasksStrategy.EndParentOnAllSubTasksEnd,  priority = 55, taskData = (with( new TaskData()) { } ), ";
        parentTaskstr += "peopleAssignments = (with ( new PeopleAssignments() ) { potentialOwners = [new User('salaboy')  ],businessAdministrators = [ new User('Administrator') ], }),";
        parentTaskstr += "names = [ new I18NText( 'en-UK', 'This is my task Parent name')] })";
        // By default the task will contain a SubTask SubTasksStrategy.NoAction

        Task parentTask = TaskFactory.evalTask(new StringReader(parentTaskstr));
        taskService.addTask(parentTask, new HashMap<String, Object>());

        long taskParentId = parentTask.getId();

        // Task should remain in Created state with no actual owner

        Task parentTask1 = taskService.getTaskById(taskParentId);
        assertEquals(parentTask1.getTaskData().getStatus(), Status.Reserved);
        
        taskService.start(taskParentId, "salaboy");
        
        String child1Taskstr = "(with (new Task()) { priority = 55,  taskData = (with( new TaskData()) { parentId= "+taskParentId+" } ), ";
        child1Taskstr += "peopleAssignments = (with ( new PeopleAssignments() ) { potentialOwners = [new User('Darth Vader')  ],businessAdministrators = [ new User('Administrator') ], }),";
        child1Taskstr += "names = [ new I18NText( 'en-UK', 'This is my task Child 1 name')] })";

        Task child1Task = TaskFactory.evalTask(new StringReader(child1Taskstr));
        taskService.addTask(child1Task, new HashMap<String, Object>());

        long child1TaskId = child1Task.getId();

        //Test if the task is succesfully created
        
        assertEquals(1, taskService.getPendingSubTasksByParent(taskParentId));
        
        Task childTask1 = taskService.getTaskById(child1TaskId);
        
        assertEquals(taskParentId, childTask1.getTaskData().getParentId());
        
        taskService.start(child1TaskId, "Darth Vader");
        
        taskService.complete(child1TaskId, "Darth Vader", null);
        
        childTask1 = taskService.getTaskById(child1TaskId);
        
        assertEquals(Status.Completed, childTask1.getTaskData().getStatus());
        
        parentTask1 = taskService.getTaskById(taskParentId);
        assertEquals(0, taskService.getPendingSubTasksByParent(taskParentId));
        
        assertEquals(Status.Completed, parentTask1.getTaskData().getStatus() );
        
        
    }
    
    
    /**
     * Loop and create 500 tasks.  The reason to do so, is Java cache's Long objects for small numbers
     * (http://stackoverflow.com/questions/3130311/weird-integer-boxing-in-java), so the ProcessSubTaskCommand was passing
     * the test, even when failing once there were a sufficient number of tasks in the system.
     * 
     * @throws Exception
     */
    @Test
    public void onSubtaskCompletionAutoCompleteParentStrategyWithLotsOfTasks() throws Exception {

        String tableName = TaskImpl.class.getAnnotation(Table.class).name();
                
        TransactionManagerServices.getTransactionManager().begin();
        try { 
            EntityManager em = getEmf().createEntityManager();
            Query query = em.createNativeQuery(
                    "select SEQUENCE_NAME from INFORMATION_SCHEMA.COLUMNS "
                            + "where TABLE_NAME = '" + tableName.toUpperCase() + "' "
                            + " and SEQUENCE_NAME IS NOT null");
            String seqName = (String) query.getSingleResult();
            query = em.createNativeQuery("alter sequence " + seqName + " increment by 1000");
            query.executeUpdate();
            
            TransactionManagerServices.getTransactionManager().commit();
        } catch( Throwable t ) { 
        	TransactionManagerServices.getTransactionManager().rollback();
            // underlying database is NOT h2, skip test
            Assume.assumeFalse(true);
        }
    	
         // One potential owner, should go straight to state Reserved
        String parentTaskstr = "(with (new Task()) { subTaskStrategy = SubTasksStrategy.EndParentOnAllSubTasksEnd,  priority = 55, taskData = (with( new TaskData()) { } ), ";
        parentTaskstr += "peopleAssignments = (with ( new PeopleAssignments() ) { potentialOwners = [new User('salaboy')  ],businessAdministrators = [ new User('Administrator') ], }),";
        parentTaskstr += "names = [ new I18NText( 'en-UK', 'This is my task Parent name')] })";
        // By default the task will contain a SubTask SubTasksStrategy.NoAction

        Task parentTask = TaskFactory.evalTask(new StringReader(parentTaskstr));
        taskService.addTask(parentTask, new HashMap<String, Object>());

        long taskParentId = parentTask.getId();

        // Task should remain in Created state with no actual owner

        Task parentTask1 = taskService.getTaskById(taskParentId);
        assertEquals(parentTask1.getTaskData().getStatus(), Status.Reserved);
        
        taskService.start(taskParentId, "salaboy");
        
        String child1Taskstr = "(with (new Task()) { priority = 55,  taskData = (with( new TaskData()) { parentId= "+taskParentId+" } ), ";
        child1Taskstr += "peopleAssignments = (with ( new PeopleAssignments() ) { potentialOwners = [new User('Darth Vader')  ],businessAdministrators = [ new User('Administrator') ], }),";
        child1Taskstr += "names = [ new I18NText( 'en-UK', 'This is my task Child 1 name')] })";

        Task child1Task = TaskFactory.evalTask(new StringReader(child1Taskstr));
        taskService.addTask(child1Task, new HashMap<String, Object>());

        long child1TaskId = child1Task.getId();

        //Test if the task is succesfully created
        
        assertEquals(1, taskService.getPendingSubTasksByParent(taskParentId));
        
        Task childTask1 = taskService.getTaskById(child1TaskId);
        
        assertEquals(taskParentId, childTask1.getTaskData().getParentId());
        
        taskService.start(child1TaskId, "Darth Vader");
        
        taskService.complete(child1TaskId, "Darth Vader", null);
        
        childTask1 = taskService.getTaskById(child1TaskId);
        
        assertEquals(Status.Completed, childTask1.getTaskData().getStatus());
        
        parentTask1 = taskService.getTaskById(taskParentId);
        assertEquals(0, taskService.getPendingSubTasksByParent(taskParentId));
        
        assertEquals(Status.Completed, parentTask1.getTaskData().getStatus() );
    }


    @Test
    public void onParentAbortCompleteAllSubTasksStrategy() throws Exception {

  
         // One potential owner, should go straight to state Reserved 
        // Notice skippable in task data
        String parentTaskstr = "(with (new Task()) { subTaskStrategy = SubTasksStrategy.SkipAllSubTasksOnParentSkip ,  priority = 55, "
                                + "taskData = (with( new TaskData()) { skipable = true } ), ";
        parentTaskstr += "peopleAssignments = (with ( new PeopleAssignments() ) { potentialOwners = [new User('salaboy')  ],businessAdministrators = [ new User('Administrator') ], }),";
        parentTaskstr += "names = [ new I18NText( 'en-UK', 'This is my task Parent name')] })";
        // By default the task will contain a SubTask SubTasksStrategy.NoAction

        Task parentTask = TaskFactory.evalTask(new StringReader(parentTaskstr));
        taskService.addTask(parentTask, new HashMap<String, Object>());

        long taskParentId = parentTask.getId();

        // Task should remain in Created state with no actual owner

        Task parentTask1 = taskService.getTaskById(taskParentId);
        assertEquals(parentTask1.getTaskData().getStatus(), Status.Reserved);
        
        taskService.start(taskParentId, "salaboy");
        
        String child1Taskstr = "(with (new Task()) { priority = 55,  taskData = (with( new TaskData()) { skipable = true, parentId= "+taskParentId+" } ), ";
        child1Taskstr += "peopleAssignments = (with ( new PeopleAssignments() ) { potentialOwners = [new User('Darth Vader')  ],businessAdministrators = [ new User('Administrator') ], }),";
        child1Taskstr += "names = [ new I18NText( 'en-UK', 'This is my task Child 1 name')] })";

        Task child1Task = TaskFactory.evalTask(new StringReader(child1Taskstr));
        taskService.addTask(child1Task, new HashMap<String, Object>());

        long child1TaskId = child1Task.getId();

        //Test if the task is succesfully created
        
        assertEquals(1, taskService.getPendingSubTasksByParent(taskParentId));
        
        Task childTask1 = taskService.getTaskById(child1TaskId);
        
        assertEquals(taskParentId, childTask1.getTaskData().getParentId());
        
        taskService.start(child1TaskId, "Darth Vader");
        
        
        
        taskService.skip(taskParentId, "salaboy");
        
        parentTask1 = taskService.getTaskById(taskParentId);
        assertEquals(0, taskService.getPendingSubTasksByParent(taskParentId));
        
        
        
        assertEquals(Status.Obsolete, parentTask1.getTaskData().getStatus() );
        
        childTask1 = taskService.getTaskById(child1TaskId);
        
        assertEquals(Status.Obsolete, childTask1.getTaskData().getStatus());
        
    }

}
