#!/usr/bin/env python
#
# Copyright (C) 2012  Codethink Limited
# 
# 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; version 2 of the License.
# 
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.


import cliapp
import logging
import urllib

from bottle import Bottle, request, response, run
from morphcacheserver.repocache import RepoCache


defaults = {
    'repo-dir': '/var/cache/morph-cache-server/gits',
}


class MorphCacheServer(cliapp.Application):

    def add_settings(self):
        self.settings.string(['repo-dir'],
                             'path to the repository cache directory',
                             metavar='PATH',
                             default=defaults['repo-dir'])

    def process_args(self, args):
        app = Bottle()

        repo_cache = RepoCache(self, self.settings['repo-dir'])
        
        @app.get('/sha1s')
        def sha1():
            repo = self._unescape_parameter(request.query.repo)
            ref = self._unescape_parameter(request.query.ref)
            try:
                sha1 = repo_cache.resolve_ref(repo, ref)
                return {
                    'repo': '%s' % repo,
                    'ref': '%s' % ref,
                    'sha1': '%s' % sha1
                }
            except Exception, e:
                response.status = 404
                logging.debug('%s' % e)
        
        @app.get('/files')
        def file():
            repo = self._unescape_parameter(request.query.repo)
            ref = self._unescape_parameter(request.query.ref)
            filename = self._unescape_parameter(request.query.filename)
            try:
                content = repo_cache.cat_file(repo, ref, filename)
                response.set_header('Content-Type', 'application/octet-stream')
                return content
            except Exception, e:
                response.status = 404
                logging.debug('%s' % e)
        
        root = Bottle()
        root.mount(app, '/1.0')
        
        run(root, host='0.0.0.0', port=8080, reloader=True)

    def _unescape_parameter(self, param):
        return urllib.unquote(param)


if __name__ == '__main__':
    MorphCacheServer().run()