#! /usr/bin/python

# Copyright (C) 2008 Ross Burton <ross@burtonini.com>
#
# Zebu 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 2 of the License, or (at your option) any later
# version.
#
# Zebu 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
# Zebu.  If not, see <http://www.gnu.org/licenses/>.

import gobject, gtk, os, re

gtk.window_set_default_icon_name("zebu")

window = gtk.Window()
window.set_title("Zebu Cowbuilder Manager")
window.set_default_size(300, 250)
window.set_border_width(8)
window.connect("delete-event", gtk.main_quit)

vbox = gtk.VBox(spacing=8)
window.add(vbox)

scrolled = gtk.ScrolledWindow()
scrolled.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
scrolled.set_shadow_type(gtk.SHADOW_IN)

# Full path, short name, description
(COL_PATH,
 COL_NAME,
 COL_DESC) = range(0, 3)
store = gtk.ListStore(gobject.TYPE_STRING, gobject.TYPE_STRING, gobject.TYPE_STRING)
store.set_sort_column_id(COL_NAME, gtk.SORT_ASCENDING)

treeview = gtk.TreeView(store)
column = gtk.TreeViewColumn("Name", gtk.CellRendererText(), text=COL_NAME)
treeview.append_column(column)
column = gtk.TreeViewColumn("Description", gtk.CellRendererText(), text=COL_DESC)
treeview.append_column(column)
scrolled.add(treeview)
vbox.pack_start(scrolled)

def update_cowbuilders():
    store.clear()
    COW_DIR = "/var/cache/pbuilder"
    for name in os.listdir(COW_DIR):
        if not name.endswith(".cow"):
            continue
        
        path = os.path.join(COW_DIR, name)
        if not os.path.isdir(path):
            continue
        
        desc = ""
        try:
            lsbre = re.compile(r'DISTRIB_DESCRIPTION="(.+)"')
            for l in open(os.path.join(path, "etc", "lsb-release")):
                m = lsbre.match(l)
                if m:
                    desc = m.group(1)
                    break;
        except IOError:
            pass
        
        if not desc:
            try:
                deb_version = open(os.path.join(path, "etc", "debian_version")).readline().strip()
                desc = "Debian %s" % deb_version
            except IOError:
                pass
            
        store.set(store.append(),
                  COL_PATH, path,
                  COL_NAME, name,
                  COL_DESC, desc)

update_cowbuilders()

def sync_selection(selection, button):
    """
    Set the sensitivity of a button based on the treeview selection.
    """
    button.set_sensitive(selection.count_selected_rows() != 0)

def task_done(pid, status):
    window.window.set_cursor(None)
    update_cowbuilders()

def spawn_cowbuilder(option, block=False, name=None, basepath=None):
    # TODO: Instead of using gnome-terminal, embed a VTE widget
    if not name:
        (model, it) = treeview.get_selection().get_selected()
        row = model[it]
        name = row[COL_NAME]
        basepath = row[COL_PATH]

    args = (
        "gnome-terminal",
        "--disable-factory",
        "-t", "Cowshell in %s" % name,
        "-x", "sudo", "sh", "-c",
        "cowbuilder %s --basepath %s ; read -n 1 -p '[done, press any key]'" % (option, basepath)
        )

    flags = gobject.SPAWN_SEARCH_PATH
    if block:
        flags |= gobject.SPAWN_DO_NOT_REAP_CHILD
        window.window.set_cursor(gtk.gdk.Cursor(gtk.gdk.WATCH))
    pid = gobject.spawn_async(argv=args, flags=flags)[0]
    
    if block:
        gobject.child_watch_add(pid, task_done)

bbox = gtk.HButtonBox()
bbox.set_spacing(6)

button = gtk.Button("New");
def on_new_clicked(button):
    from zebu import NewCowDialog
    dialog = NewCowDialog.NewCowDialog(window)
    if dialog.run() == gtk.RESPONSE_ACCEPT:
        name = dialog.get_name()
        details = dialog.get_details()
        dialog.destroy()
        spawn_cowbuilder("--create --mirror %s --distribution %s --components \"%s\"" % details,
                         True, name, "/var/cache/pbuilder/%s.cow" % name)
    else:
        dialog.destroy()
button.connect("clicked", on_new_clicked)
bbox.add(button)

button = gtk.Button("Update");
def on_update_clicked(button):
    spawn_cowbuilder("--update", True)
button.connect("clicked", on_update_clicked)
treeview.get_selection().connect("changed", sync_selection, button)
bbox.add(button)

button = gtk.Button("Login")
def on_login_clicked(button):
    spawn_cowbuilder("--login", False)
button.connect("clicked", on_login_clicked)
treeview.get_selection().connect("changed", sync_selection, button)
bbox.add(button)

button = gtk.Button("Browse")
def on_browse_clicked(button):
    (model, it) = treeview.get_selection().get_selected()
    row = model[it]
    gobject.spawn_async(("nautilus", row[COL_PATH]), flags=gobject.SPAWN_SEARCH_PATH)
button.connect("clicked", on_browse_clicked)
treeview.get_selection().connect("changed", sync_selection, button)
bbox.add(button)

vbox.pack_start(bbox, expand=False)

window.show_all()
gtk.main()