##
## interfaces.py
from zope.interface import Attribute, invariant, Invalid
from zope import schema
from waeup.sirp.interfaces import IWAeUPObject
from waeup.sirp.hostels.vocabularies import (
    bed_letters, blocks, special_handling)

class IHostelsContainer(IWAeUPObject):
    """A container for all kind of hostel objects.

    """

class IHostel(IWAeUPObject):
    """A base representation of hostels.

    """

    def loggerInfo(ob_class, comment):
        """Adds an INFO message to the log file
        """

    def updateBeds():
        """Fill hostel with beds or update beds.
        """

    hostel_id = schema.TextLine(
        title = u'Hostel Id',
        readonly = True,
        )

    sort_id = schema.Int(
        title = u'Sort Id',
        required = True,
        default = 10,
        )

    hostel_name = schema.TextLine(
        title = u'Hall Name',
        required = True,
        default = u'Hall 1',
        )

    floors_per_block = schema.Int(
        title = u'Floors per Block',
        required = True,
        default = 3,
        )

    rooms_per_floor = schema.Int(
        title = u'Rooms per Floor',
        required = True,
        default = 20,
        )

    #beds_per_room = schema.Int(
    #    title = u'Beds per Room',
    #    required = True,
    #    default = 6,
    #    )

    blocks_for_female = schema.List(
        title = u'Blocks for Female Students',
        value_type = schema.Choice(
            vocabulary = blocks
            ),
        )

    blocks_for_male = schema.List(
        title = u'Blocks for Male Students',
        value_type = schema.Choice(
            vocabulary = blocks
            ),
        )

    beds_for_fresh = schema.List(
        title = u'Beds for Fresh Students',
        value_type = schema.Choice(
            vocabulary = bed_letters
            ),
        )

    beds_for_returning = schema.List(
        title = u'Beds for Returning Students',
        value_type = schema.Choice(
            vocabulary = bed_letters
            ),
        )

    beds_for_final = schema.List(
        title = u'Beds for Final Year Students',
        value_type = schema.Choice(
            vocabulary = bed_letters
            ),
        )

    special_handling = schema.Choice(
        title = u'Special Handling',
        vocabulary = special_handling,
        required = True,
        default = u'none',
        )

    reserved = schema.TextLine(
        title = u'Reserved Rooms',
        required = False,
        default = u'',
        )

    @invariant
    def blocksOverlap(hostel):
        bfe = hostel.blocks_for_female
        bma = hostel.blocks_for_male
        if set(bfe).intersection(set(bma)):
            raise Invalid('Female and male blocks overlap.')

    @invariant
    def bedsOverlap(hostel):
        bfr = hostel.beds_for_fresh
        bre = hostel.beds_for_returning
        bfi = hostel.beds_for_final
        if (set(bfr).intersection(set(bre)) or
            set(bfr).intersection(set(bfi)) or
            set(bre).intersection(set(bfi))):
            raise Invalid('Bed categories overlap.')

    #@invariant
    #def numberOfBeds(hostel):
    #    bfr = hostel.beds_for_fresh
    #    bre = hostel.beds_for_returning
    #    bfi = hostel.beds_for_final
    #    if len(bfr + bre + bfi) != hostel.beds_per_room:
    #        raise Invalid(
    #            'Bed categories and number of beds per room do not match.')

class IBed(IWAeUPObject):
    """A base representation of beds.

    """

    def loggerInfo(ob_class, comment):
        """Adds an INFO message to the log file
        """

    def getBedCoordinates():
        """Determine the coordinates from bed_id.
        """

    bed_id = schema.TextLine(
        title = u'Bed Id',
        required = True,
        default = u'',
        )

    bed_type = schema.TextLine(
        title = u'Bed Type',
        required = True,
        default = u'',
        )

    sort_id = schema.Int(
        title = u'Sort Id',
        required = True,
        default = 100,
        )

    owner = schema.TextLine(
        title = u'Owner (Student)',
        required = True,
        default = u'',
        )