#!/usr/bin/python
#
# The Qubes OS Project, http://www.qubes-os.org
#
# Copyright (C) 2012 Bruce Downs <bruceadowns@gmail.com>
#
# 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 2
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
#
import os
from optparse import OptionParser
import gtk

class QubesMruDialog(gtk.Dialog):
    entry = None
    mrufile = None

    def __init__(self, title, text, mrufile):
        self.mrufile = mrufile

        gtk.Dialog.__init__(
            self,
            title,
            None,
            0,
            (gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL,
             gtk.STOCK_OK, gtk.RESPONSE_OK))

        # setting the default response to 'ok'
        # does not work as advertised
        # using key-press-event instead
        #self.set_default_response(gtk.RESPONSE_OK)

        self.connect("destroy", lambda *w: gtk.main_quit())
        self.connect("response", self.response_callback)
        self.connect("key-press-event", self.key_press_callback)

        self.set_position(gtk.WIN_POS_CENTER)
        self.set_resizable(True)

        vbox = gtk.VBox(True, 5)
        self.vbox.pack_start(vbox, True, True, 0)
        vbox.set_border_width(5)

        label = gtk.Label()
        label.set_markup(text)
        vbox.pack_start(label, False, False, 0)

        # Create our entry
        self.entry = gtk.Entry()
        vbox.pack_start(self.entry, False, False, 0)

        # Create the completion object
        completion = gtk.EntryCompletion()

        # Assign the completion to the entry
        self.entry.set_completion(completion)

        # Create a tree model and use it as the completion model
        completion_model, firstline = self.create_completion_model()
        completion.set_model(completion_model)

        # Use model column 0 as the text column
        completion.set_text_column(0)

        if firstline:
            self.entry.set_text(firstline)

        self.show_all()

    def create_completion_model(self):
        store = gtk.ListStore(str)
        firstline = None

        if self.mrufile and os.access(self.mrufile, os.R_OK):
            # read lines from mru file
            lines = [line.strip() for line in open(self.mrufile)]
            for line in lines:
                if not firstline:
                    firstline = line

                iter = store.append()
                store.set(iter, 0, line)

        return store, firstline

    def handle_ok(self):
        my_entry = self.entry.get_text()

        if len(my_entry) > 0:
            linesorg = []
            linesorg.insert(0, my_entry)

            # calc mru lines
            if os.access(self.mrufile, os.R_OK):
                # read lines from existing mru file
                fMru = open(self.mrufile, "r")
                linesorg += [line.strip() for line in fMru]
                fMru.close()

            #uniqify
            linesuniq = []
            for lineuniq in linesorg:
                if (len(lineuniq) > 0 and lineuniq not in linesuniq):
                    linesuniq.append(lineuniq)

            # write to mru
            # up to 50 unique
            fMru = file(self.mrufile, "w")
            fMru.writelines( "%s\n" % line for line in linesuniq[:50] )
            fMru.close()

        # print entry to stdout
        print my_entry

    def response_callback(self, button, response_id):
        if response_id == gtk.RESPONSE_OK:
            self.handle_ok()
        self.destroy()

    def key_press_callback(self, button, event):
        if event.keyval == gtk.keysyms.Return:
            self.handle_ok()
            self.destroy()

def main():
    usage = "usage: %prog [--title 'Qubes Title'] [--text 'Qubes Text'] [--mrufile 'mru file name']"
    parser = OptionParser (usage)
    parser.add_option ("-l", "--title",
                       action="store",
                       dest="title",
                       default="Qubes MRU Dialog Entry",
                       help="Set the dialog title [%default]")
    parser.add_option ("-x", "--text",
                       action="store",
                       dest="text",
                       default="Enter Qubes text:",
                       help="Set the dialog text [%default]")
    parser.add_option ("-f", "--mrufile",
                       action="store",
                       dest="mrufile",
                       default='qvm-mru',
                       help="MRU file name [%default]")
    (options, args) = parser.parse_args ()

    mrudir = os.path.expanduser('~') + os.sep + '.config'
    if not os.path.exists(mrudir):
        os.makedirs(mrudir)
    QubesMruDialog(options.title, options.text, mrudir + os.sep + options.mrufile)
    gtk.main()

main()

