"""Interfaces of academics specific objects.
"""
from zope import schema
from zope.interface import Attribute
from waeup.sirp.interfaces import (IWAeUPObject, IWAeUPContainer)
                                   
from waeup.sirp.university.vocabularies import (
    course_levels,
    semester,
    application_categories,
    study_mode,
    inst_types,
    CourseSource,
    )


class IFaculty(IWAeUPContainer):
    """Representation of a university faculty.
    """
    code = schema.TextLine(
        title = u'Code',
        description = u'Abbreviated code of the faculty',
        default = u'NA',
        required = True,
        readonly = True,
        )

    title = schema.TextLine(
        title = u'Name of faculty',
        default = u'Unnamed',
        required = True,
        )

    title_prefix = schema.Choice(
        title = u'Name prefix',
        default = u'faculty',
        vocabulary = inst_types,
        required = True,
        )
        
    def longtitle():
        """
        Returns the long title of a faculty.
        """        
        
class IFacultyAdd(IFaculty):
    """Representation of a university faculty.
    """
    code = schema.TextLine(
        title = u'Code',
        description = u'Abbreviated code of the faculty',
        default = u'NA',
        required = True,
        readonly = False,
        )
                 
IFacultyAdd['code'].order =  IFaculty['code'].order            
    
class IFacultyContainer(IWAeUPContainer):
    """A container for faculties.
    """
    def addFaculty(faculty):
        """Add an IFactulty object.

        Returns the key, under which the object was stored.
        """
class IDepartment(IWAeUPObject):
    """Representation of a department.
    """
    code = schema.TextLine(
        title = u'Code',
        default = u'NA',
        description = u'Abbreviated code of the department',
        required = True,
        readonly = True,
        )

    title = schema.TextLine(
        title = u'Name of department',
        default = u'Unnamed',
        required = True,
        )

    title_prefix = schema.Choice(
        title = u'Name prefix',
        vocabulary = inst_types,
        default = u'department',
        required = True,
        )

    courses = Attribute("A container for courses.")
    certificates = Attribute("A container for certificates.")
    
    def longtitle():
        """
        Returns the long title of a department.
        """
        
class IDepartmentAdd(IDepartment):
    """Representation of a university department.
    """
    code = schema.TextLine(
        title = u'Code',
        default = u'NA',
        description = u'Abbreviated code of the department',
        required = True,
        readonly = False,
        )
                 
IDepartmentAdd['code'].order =  IDepartment['code'].order         

class ICourseContainer(IWAeUPContainer):
    """A container for faculties.
    """
    def addCourse(faculty):
        """Add an ICourse object.

        Returns the key, under which the object was stored.
        """

class ICourse(IWAeUPObject):
    """Representation of a course.
    """
    code = schema.TextLine(
        title = u'Code',
        default = u'NA',
        description = u'Abbreviated code of the course',
        required = True,
        readonly = True,
        )

    title = schema.TextLine(
        title = u'Title of course',
        default = u'Unnamed',
        required = True,
        )

    credits = schema.Int(
        title = u'Credits',
        default = 0,
        required = False,
        )
    
    passmark = schema.Int(
        title = u'Passmark',
        default = 40,
        required = False,
        )

    semester = schema.Choice(
        title = u'Semester/Term',
        default = 0,
        vocabulary = semester,
        required = True,
        )
        
    def longtitle():
        """
        Returns the long title of a course.
        """        

class ICourseAdd(ICourse):
    """Representation of a course.
    """
    code = schema.TextLine(
        title = u'Code',
        default = u'NA',
        description = u'Abbreviated code of the course',
        required = True,
        readonly = False,
        )
        
ICourseAdd['code'].order =  ICourse['code'].order         

class ICertificate(IWAeUPObject):
    """Representation of a certificate.
    """
    code = schema.TextLine(
        title = u'Code',
        default = u'NA',
        description = u'Abbreviated code of the certificate.',
        required = True,
        readonly = True,
        )

    #review_state = schema.Choice(
    #    title = u'Review State',
    #    default = 'unchecked',
    #    values = ['unchecked', 'checked']
    #    )

    title = schema.TextLine(
        title = u'Title',
        default = u'Unnamed',
        required = True,
        )

    study_mode = schema.Choice(
        title = u'Study Mode',
        vocabulary = study_mode,
        default = u'ug_ft',
        required = True,
        )

    start_level = schema.Choice(
        title = u'Start Level',
        #source = LevelSource(),
        vocabulary = course_levels,
        default = 100,
        required = True,
        )
    
    end_level = schema.Choice(
        title = u'End Level',
        #source = LevelSource(),
        vocabulary = course_levels,
        default = 500,
        required = True,
        )
    
    application_category = schema.Choice(
        title = u'Application Category',
        vocabulary = application_categories,
        default = u'basic',
        required = True,
        )   

    def longtitle():
        """
        Returns the long title of a certificate.
        """        

class ICertificateAdd(ICertificate):
    """Representation of a certificate.
    """
    code = schema.TextLine(
        title = u'Code',
        default = u'NA',
        description = u'Abbreviated code of the certificate.',
        required = True,
        readonly = False,
        )
        
ICertificateAdd['code'].order =  ICertificate['code'].order         
    
class ICertificateContainer(IWAeUPContainer):
    """A container for certificates.
    """
    def addCertificate(faculty):
        """Add an ICertificate object.

        Returns the key, under which the object was stored.
        """

class ICertificateCourse(IWAeUPObject):
    """A certificatecourse is referring a course and 
       provides some own attributes.
    """
    course = schema.Choice(
        title = u'Course referrer',
        source = CourseSource(),
        readonly = True,
        )
    
    level = schema.Choice(
        title = u'Level',
        required = True,
        #source = LevelSource(),
        vocabulary = course_levels,
        readonly = False,
        )

    core_or_elective = schema.Bool(
        title = u'Is mandatory course (not elective)',
        required = True,
        default = True,
        )

    def getCourseCode():
        """Return the code of the course referred to.

        This is needed for cataloging.
        """
        
    def longtitle():
        """
        Returns the long title of a certificatecourse.
        """          
        
        
class ICertificateCourseAdd(ICertificateCourse):
    """A certificatecourse is referring a course and 
       provides some own attributes.
    """
    course = schema.Choice(
        title = u'Course',
        source = CourseSource(),
        readonly = False,
        )
                  
ICertificateCourseAdd['course'].order =  ICertificateCourse['course'].order