/**
 * ProjectsController.java
 * 
 * $Author: cysun $
 * $Date: 2009-03-16 08:08:21 -0700 (Mon, 16 Mar 2009) $
 * $Revision: 242 $
 */
package csns.spring.controller;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.AbstractController;

import csns.model.Assignment;
import csns.model.Course;
import csns.model.Enrollment;
import csns.model.File;
import csns.model.Grade;
import csns.model.Quarter;
import csns.model.Section;
import csns.model.Submission;
import csns.model.User;
import csns.model.assessment.SeniorProject;
import csns.model.dao.CourseDao;
import csns.model.dao.QuarterDao;
import csns.model.dao.SectionDao;

public class ProjectsController extends AbstractController {

    private String     downloadUrl;

    private CourseDao  courseDao;
    private QuarterDao quarterDao;
    private SectionDao sectionDao;

    protected ModelAndView handleRequestInternal( HttpServletRequest request,
        HttpServletResponse response ) throws Exception
    {
        Course cs491b = courseDao.getCourseByCode( "CS491B" );

        Quarter currentQuarter = new Quarter();
        String quarterCode = request.getParameter( "quarter" );
        Quarter quarter = quarterCode == null ? currentQuarter.previous()
            : new Quarter( Integer.parseInt( quarterCode ) );

        List<Quarter> quarters = quarterDao.getQuartersByCourse( cs491b );
        for( int i = 0; i < quarters.size(); ++i )
            if( quarters.get( i ).equals( currentQuarter ) )
            {
                quarters.remove( i );
                break;
            }

        List<SeniorProject> projects = new ArrayList<SeniorProject>();
        Map<User, SeniorProject> indexedProjects = new HashMap<User, SeniorProject>();
        List<Section> sections = sectionDao.getSections( quarter, cs491b );
        for( Section section : sections )
        {
            for( Enrollment enrollment : section.getEnrollments() )
            {
                Grade grade = enrollment.getGrade();
                if( grade == null || grade.getValue() == null
                    || grade.getValue() < 2 ) continue;

                SeniorProject project = new SeniorProject( enrollment
                    .getStudent() );
                projects.add( project );
                indexedProjects.put( enrollment.getStudent(), project );
            }

            for( Assignment assignment : section.getAssignments() )
            {
                String name = assignment.getName();

                if( name.equals( "Project" ) )
                    setProjectInfo( assignment, indexedProjects );

                if( name.equals( "Project Report" )
                    || name.equals( "Project Report (Final)" ) )
                    setReportInfo( assignment, indexedProjects );

                if( name.equals( "Project Presentation" )
                    || name.equals( "Final Presentation" ) )
                    setPresentationInfo( assignment, indexedProjects );
            }
        }

        return new ModelAndView( "projects" ).addObject( "projects", projects )
            .addObject( "quarter", quarter ).addObject( "quarters", quarters );
    }

    private void setProjectInfo( Assignment assignment,
        Map<User, SeniorProject> indexedProjects )
    {
        for( Submission submission : assignment.getSubmissions() )
        {
            SeniorProject project = indexedProjects.get( submission
                .getStudent() );
            String notes = submission.getNotes();
            if( notes != null && notes.equalsIgnoreCase( "good" ) )
                project.setGood( true );
        }
    }

    private void setReportInfo( Assignment assignment,
        Map<User, SeniorProject> indexedProjects )
    {
        for( Submission submission : assignment.getSubmissions() )
        {
            SeniorProject project = indexedProjects.get( submission
                .getStudent() );
            File file = getLatestFile( submission.getFiles() );
            if( project != null )
            {
                project.setTitle( submission.getNotes() );
                if( file != null )
                    project.setReportUrl( downloadUrl + "?fileId="
                        + file.getId() );
            }
        }
    }

    private void setPresentationInfo( Assignment assignment,
        Map<User, SeniorProject> indexedProjects )
    {
        for( Submission submission : assignment.getSubmissions() )
        {
            SeniorProject project = indexedProjects.get( submission
                .getStudent() );
            File file = getLatestFile( submission.getFiles() );
            if( project != null )
            {
                project.setVideoUrl( submission.getNotes() );
                if( file != null )
                    project.setSlidesUrl( downloadUrl + "?fileId="
                        + file.getId() );
            }
        }
    }

    private File getLatestFile( Set<File> files )
    {
        File latestFile = null;

        for( File file : files )
            if( latestFile == null
                || latestFile.getDate().before( file.getDate() ) )
                latestFile = file;

        return latestFile;
    }

    public void setDownloadUrl( String downloadUrl )
    {
        this.downloadUrl = downloadUrl;
    }

    public void setCourseDao( CourseDao courseDao )
    {
        this.courseDao = courseDao;
    }

    public void setQuarterDao( QuarterDao quarterDao )
    {
        this.quarterDao = quarterDao;
    }

    public void setSectionDao( SectionDao sectionDao )
    {
        this.sectionDao = sectionDao;
    }

}