# Copyright (C) 2007, 2008 by Intevation GmbH
# Authors:
# Bernhard Herzog <bh@intevation.de>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with the software for details.

import os
import shutil

from genshi.template import TemplateLoader

import cherrypy
from cherrypy import expose
from cherrypy.lib import cptools

import report


class Status(object):

    """Implements the tree packager status pages"""

    def __init__(self, treepkg_config, template):
        self.treepkg_config = treepkg_config
        self.template = template
        self.loader = TemplateLoader([os.path.join(os.path.dirname(__file__),
                                                   os.path.pardir,
                                                   "web")])

    @expose
    def index(self):
        group = report.get_packager_group(self.treepkg_config)
        tmpl = self.loader.load(self.template)
        stream = tmpl.generate(report=report.prepare_report(group))
        return stream.render('html')

    def determine_log_filename(self, package_track_name, revno, log_basename):
        """Returns the name of a log file of a revision if it exists"""
        group = report.get_packager_group(self.treepkg_config)
        for track in group.get_package_tracks():
            if track.name == package_track_name:
                for revision in track.get_revisions():
                    if str(revision.revision) == revno:
                        for title, filename in revision.list_log_files():
                            if os.path.basename(filename) == log_basename:
                                return filename

    @expose
    def default(self, *rest):
        """Handles requests for logfiles of the form .../pkg/revno/*"""
        filename = None
        if len(rest) == 3:
            filename = self.determine_log_filename(*rest)
        if filename is not None:
            return cptools.serveFile(filename, contentType="text/plain")
        else:
            raise cherrypy.HTTPError(status="404")

    def create_static_site(self, destdir):
        """Creates a static web-page under destdir"""
        # make sure we have an empty destdir
        shutil.rmtree(destdir, True)
        os.mkdir(destdir)

        # create the index file
        f = open(os.path.join(destdir, "index.html"), "wt")
        f.write(self.index())
        f.close()

        # symlink the build-logs
        group = report.get_packager_group(self.treepkg_config)
        for track in group.get_package_tracks():
            trackdir = os.path.join(destdir, track.name)
            for revision in track.get_revisions():
                revdir = os.path.join(trackdir, str(revision.revision))
                if revision.has_build_log():
                    if not os.path.isdir(trackdir):
                        os.mkdir(trackdir)
                    os.mkdir(revdir)
                    for title, filename in revision.list_log_files():
                        os.symlink(filename,
                                   os.path.join(revdir,
                                                os.path.basename(filename)))




class TreePKG(object):

    """Root object for the tree packager web interface"""

    @expose
    def index(self):
        raise cherrypy.HTTPRedirect('/status')


def runserver(treepkg_config, cherrypy_config, status_template):
    cherrypy.root = TreePKG()
    cherrypy.root.status = Status(treepkg_config=treepkg_config,
                                  template=status_template)

    cherrypy.config.update(file=cherrypy_config)
    cherrypy.server.start()