import json
import os

import PIL

from bureau import Bureau, add_command, add_api


class Publications(Bureau):
    """
    The Publications Office serves as a kind of screenless content management
    system.  Create, update and organize your sites while doing most of the work
    on paper or anything you can photograph.
    """

    name = "Publications Office"
    prefix = "PB"
    version = 0

    def __init__(self):
        Bureau.__init__(self)
        self.db = os.path.expanduser("~/.screenless/PB.data")
        if not os.path.exists(self.db):
            os.mkdir(self.db)
        

    @add_command("new", "Create a new Publication/Site")
    def new_site(self):
        """
        Create a new Publication/Site, set up config and tace a picture from
        the document camera as the index page.  Finally, it will print out
        the main page with commands for working with the site.
        """
        site_dir = os.path.join(self.db, "1")
        site_id = 1
        while os.path.exists(site_dir):
            site_id += 1
            site_dir = os.path.join(self.db, str(site_id))
        os.mkdir(site_dir)

        root_d = {"template": "default", "id": site_id}
        with open(os.path.join(site_dir, "root.json", "w")) as root_json:
            root_json.write(json.dumps(root_d))

        photo = self.send("PX", "photo")["photo"]

        # TODO: come up with a generic set of img form operations for Bureau
        #       should map regions defined with percentages to names
        form_img = PIL.Image.open(photo)
        fx, fy = form_img.size
        title_region = (0, 0, 0.5 * fx, 0.125 * fy)
        title_img = form_img.crop(title_region)
        content_region = (0, 0.125 * fy, fx, fy)
        content_img = form_img.crop(content_region)

    def _update_page(self, site, page):
        pass




def main():
    pb = Publications()
    pb.run()


if __name__ == "__main__":
    main()