from __future__ import print_function

from flask import url_for
from url_for_s3 import url_for_s3

from project import db


class Thingy(db.Model):
    """Sample model for flask-s3-save-example."""

    id = db.Column(db.Integer(), primary_key=True)
    image = db.Column(db.String(255), default='')
    image_storage_type = db.Column(db.String(255), default='')
    image_storage_bucket_name = db.Column(db.String(255), default='')

    def __repr__(self):
        return 'A thingy'

    @property
    def image_url(self):
        from flask import current_app as app
        return (self.image
            and '%s%s' % (
                app.config['UPLOADS_RELATIVE_PATH'],
                self.image)
            or None)

    @property
    def image_url_storageaware(self):
        if not self.image:
            return None

        if not (
                self.image_storage_type
                and self.image_storage_bucket_name):
            return url_for(
                'static',
                filename=self.image_url,
                _external=True)

        if self.image_storage_type != 's3':
            raise ValueError((
                'Storage type "%s" is invalid, the only supported ' +
                'storage type (apart from default local storage) ' +
                'is s3.') % self.image_storage_type)

        return url_for_s3(
            'static',
            bucket_name=self.image_storage_bucket_name,
            filename=self.image_url)