from __future__ import absolute_import

from django.conf import settings
import django.utils.http

# the top-level pngtile package
from pngtile.store import (
        Error,
        NotFound,
        InvalidImage,
        UncachedImage,
        PNGTileStore,
)

class Store (PNGTileStore):
    def __init__ (self, tileserver, **opts):
        super(Store, self).__init__(**opts)

        self.tileserver = tileserver

    def breadcrumb (self, name):
        """
            Yield (name, title) tuples for breadcrumb to name
        """

        path = [ ]

        for part in name.split('/'):
            path.append(part)

            yield '/'.join(path), part

    def tiles_url (self, name, **query):
        """
            Return a tileserver URL.
        """

        url = self.tileserver

        if name:
            url += name

        if query:
            url += '?' + django.utils.http.urlencode(query)

        return url

STORE = Store(
    # PNGTileStore
    image_root  = settings.QMSK_PNGTILE_ROOT,
    
    # Store
    tileserver  = settings.QMSK_PNGTILE_SERVER,
)