"""
api_photo.py : Trovebox Photo API Classes
"""
import base64

from trovebox import http
from trovebox.errors import TroveboxError
from trovebox.objects.photo import Photo
from .api_base import ApiBase

def _extract_ids(photos):
    """
    Given a list of objects, extract the photo id for each Photo
    object.
    """
    ids = []
    for photo in photos:
        if isinstance(photo, Photo):
            ids.append(photo.id)
        else:
            ids.append(photo)
    return ids

class ApiPhotos(ApiBase):
    """ Definitions of /photos/ API endpoints """
    # TODO: Add options
    def list(self, **kwds):
        """
        Endpoint: /photos/list.json

        Returns a list of Photo objects.
        """
        photos = self._client.get("/photos/list.json", **kwds)["result"]
        photos = http.result_to_list(photos)
        return [Photo(self._client, photo) for photo in photos]

    # def share(self, **kwds):

    def delete(self, photos, **kwds):
        """
        Endpoint: /photos/delete.json

        Deletes a list of photos.
        Returns True if successful.
        Raises a TroveboxError if not.
        """
        ids = _extract_ids(photos)
        if not self._client.post("/photos/delete.json", ids=ids,
                                 **kwds)["result"]:
            raise TroveboxError("Delete response returned False")
        return True

    def update(self, photos, **kwds):
        """
        Endpoint: /photos/<id>/update.json

        Updates a list of photos with the specified parameters.
        Returns True if successful.
        Raises TroveboxError if not.
        """
        ids = _extract_ids(photos)
        if not self._client.post("/photos/update.json", ids=ids,
                                 **kwds)["result"]:
            raise TroveboxError("Update response returned False")
        return True

class ApiPhoto(ApiBase):
    """ Definitions of /photo/ API endpoints """
    def delete(self, photo, **kwds):
        """
        Endpoint: /photo/<id>/delete.json

        Deletes a photo.
        Returns True if successful.
        Raises a TroveboxError if not.
        """
        if not isinstance(photo, Photo):
            photo = Photo(self._client, {"id": photo})
        return photo.delete(**kwds)

    # def delete_source(self, photo, **kwds):

    def edit(self, photo, **kwds):
        """
        Endpoint: /photo/<id>/edit.json

        Returns an HTML form to edit a photo's attributes.
        """
        if not isinstance(photo, Photo):
            photo = Photo(self._client, {"id": photo})
        return photo.edit(**kwds)

    def replace(self, photo, photo_file, **kwds):
        """ Not yet implemented """
        raise NotImplementedError()

    def replace_encoded(self, photo, photo_file, **kwds):
        """ Not yet implemented """
        raise NotImplementedError()

    def update(self, photo, **kwds):
        """
        Endpoint: /photo/<id>/update.json

        Updates a photo with the specified parameters.
        Returns the updated photo object.
        """
        if not isinstance(photo, Photo):
            photo = Photo(self._client, {"id": photo})
        photo.update(**kwds)
        return photo

    # TODO: Add options
    def view(self, photo, **kwds):
        """
        Endpoint: /photo/<id>/view.json

        Requests all properties of a photo.
        Can be used to obtain URLs for the photo at a particular size,
          by using the "returnSizes" parameter.
        Returns the requested photo object.
        """
        if not isinstance(photo, Photo):
            photo = Photo(self._client, {"id": photo})
        photo.view(**kwds)
        return photo

    def upload(self, photo_file, **kwds):
        """
        Endpoint: /photo/upload.json

        Uploads the specified photo filename.
        """
        with open(photo_file, 'rb') as in_file:
            result = self._client.post("/photo/upload.json",
                                       files={'photo': in_file},
                                       **kwds)["result"]
        return Photo(self._client, result)

    def upload_encoded(self, photo_file, **kwds):
        """
        Endpoint: /photo/upload.json

        Base64-encodes and uploads the specified photo filename.
        """
        with open(photo_file, "rb") as in_file:
            encoded_photo = base64.b64encode(in_file.read())
        result = self._client.post("/photo/upload.json", photo=encoded_photo,
                                   **kwds)["result"]
        return Photo(self._client, result)

    def dynamic_url(self, photo, **kwds):
        """ Not yet implemented """
        raise NotImplementedError()

    # TODO: Add options
    def next_previous(self, photo, **kwds):
        """
        Endpoint: /photo/<id>/nextprevious.json

        Returns a dict containing the next and previous photo lists
        (there may be more than one next/previous photo returned).
        """
        if not isinstance(photo, Photo):
            photo = Photo(self._client, {"id": photo})
        return photo.next_previous(**kwds)

    def transform(self, photo, **kwds):
        """
        Endpoint: /photo/<id>/transform.json

        Performs the specified transformations.
          eg. transform(photo, rotate=90)
        Returns the transformed photo.
        """
        if not isinstance(photo, Photo):
            photo = Photo(self._client, {"id": photo})
        photo.transform(**kwds)
        return photo