# Copyright (C) 2009  Lars Wirzenius <liw@liw.fi>
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


# This is necessary for running under Python 2.5, which we need to
# do on Debian, for now.
from __future__ import with_statement


import os
import subprocess
import tempfile

import dimbola


class ConvertToPNGAndGimpIt(dimbola.BackgroundJob):

    def __init__(self, mwc, photoid):
        with mwc.db:
            folderid, basename, c, d = mwc.db.get_basic_photo_metadata(photoid)
            foldername = mwc.db.get_folder_name(folderid)

        self.pathname = os.path.join(foldername, basename)
        self.pngname = self.pathname + '.png'
        
    def run(self):
        if not os.path.exists(self.pngname):
            p = subprocess.Popen(['dcraw', '-c', self.pathname], 
                                 stdout=subprocess.PIPE)
            ppm, stderr = p.communicate('')
            if p.returncode:
                raise Exception('dcraw failed: exit code %s:\n%s' %
                                (p.returncode, stderr))

            pixbuf = dimbola.image_data_to_pixbuf(ppm)
            pixbuf.save(self.pngname, 'png')
            
        os.spawnlp(os.P_NOWAIT, "gimp", "gimp", self.pngname)


class Gimp(dimbola.Plugin):

    '''Edit selected photos using the GIMP.'''

    def __init__(self, mwc):
        self.mwc = mwc
        
    def enable(self):
        self.mwc.add_to_menu('photo_menu', 'gimp_menuitem', 
                             'Edit with the GIMP')
        
    def disable(self):
        self.mwc.remove_from_menu('photo_menu', 'gimp_menuitem')
    
    def on_gimp_menuitem_activate(self, *args):
        selected = self.mwc.grid.model.selected
        for photoid in selected:
            job = ConvertToPNGAndGimpIt(self.mwc, photoid)
            self.mwc.add_bgjob(job)

    def gimp_menuitem_is_sensitive(self):
        return self.mwc.grid.model.selected