#! /usr/bin/python
#
# Author: Rodney Dawes <rodney.dawes@canonical.com>
#
# Copyright 2009 Canonical Ltd.
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 3, as published
# by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranties of
# MERCHANTABILITY, SATISFACTORY QUALITY, 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/>.

from __future__ import with_statement
import os
import sys

import gobject
import gtk
import pygtk
import pynotify

from ConfigParser import ConfigParser
import subprocess

from xdg.BaseDirectory import (
    xdg_config_home,
    )

from lptools import config

pygtk.require('2.0')

import indicate
from time import time

ICON_NAME = "bzr-icon-64"

class Preferences(object):

      def __init__(self):
            self.filename = os.path.join(xdg_config_home, "lptools",
                                         "lptools.conf")
            self.config = ConfigParser()
            self.config.read(self.filename)
            if not os.path.isdir(os.path.dirname(self.filename)):
                  os.makedirs(os.path.dirname(self.filename))

            if not self.config.has_section("lptools"):
                  self.config.add_section("lptools")

            if self.config.has_option("lptools", "projects"):
                  self.projects = self.config.get("lptools",
                                                  "projects").split(",")
            else:
                  self.projects = []

            # gtk.ListStore for the dialog
            self.store = None
            self.dialog = self.__build_dialog()

      def __build_dialog(self):
            dialog = gtk.Dialog()
            dialog.set_title("Pending Reviews Preferences")
            dialog.set_destroy_with_parent(True)
            dialog.set_has_separator(False)
            dialog.set_default_size(240, 320)

            area = dialog.get_content_area()

            vbox = gtk.VBox(spacing=6)
            vbox.set_border_width(12)
            area.add(vbox)
            vbox.show()

            label = gtk.Label("<b>%s</b>" % "_Projects")
            label.set_use_underline(True)
            label.set_use_markup(True)
            label.set_alignment(0.0, 0.5)
            vbox.pack_start(label, expand=False, fill=False)
            label.show()

            hbox = gtk.HBox(spacing=12)
            vbox.pack_start(hbox, expand=True, fill=True)
            hbox.show()

            misc = gtk.Label()
            hbox.pack_start(misc, expand=False, fill=False)
            misc.show()

            scrollwin = gtk.ScrolledWindow()
            scrollwin.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
            hbox.pack_start(scrollwin, expand=True, fill=True)
            scrollwin.show()

            self.store = gtk.ListStore(str)

            view = gtk.TreeView(self.store)
            label.set_mnemonic_widget(view)
            view.set_headers_visible(False)
            scrollwin.add(view)
            view.show()

            cell = gtk.CellRendererText()
            cell.set_property("editable", True)
            cell.connect("editing_started", self.__edit_started)
            cell.connect("edited", self.__edit_finished)
            col = gtk.TreeViewColumn("Project", cell, markup=0)
            view.append_column(col)

            dialog.connect("close", self.__dialog_closed, 0)
            dialog.connect("response", self.__dialog_closed)

            return dialog

      def __edit_started(self, cell, editable, path):
            return

      def __edit_finished(self, sell, path, text):
            if text == "Click here to add a project...":
                  return
            treeiter = self.store.get_iter_from_string(path)
            label = "<i>%s</i>" % "Click here to add a project..."
            self.store.set(treeiter, 0, label)
            self.projects.append(text)
            self.store.append([text,])

      def __dialog_closed(self, dialog, response):
            dialog.hide()
            if len(self.projects) > 0:
                  self.config.set("lptools", "projects",
                                  ",".join(self.projects))
                  with open(self.filename, "w+b") as f:
                        self.config.write(f)

      def show_dialog(self, parent):
            if not self.dialog.get_transient_for():
                  self.dialog.set_transient_for(parent)
            self.store.clear()
            text = "<i>%s</i>" % "Click here to add a project..."
            self.store.append([text,])
            if len(self.projects) != 0:
                  for project in self.projects:
                        self.store.append([project,])
            self.dialog.run()

def server_display (server):
    ret = subprocess.call(["./review-list"])
    if ret != 0:
        sys.stderr.write("Failed to run './review-list'\n")

def indicator_display (indicator):
    name = indicator.get_property("name")
    url = "http://code.launchpad.net/" + name + "/+activereviews"
    ret = subprocess.call(["xdg-open", url])
    if ret != 0:
        sys.stderr.write("Failed to run 'xdg-open %s'\n" % url)

class Main(object):

    def __init__(self):
        self.id = 0
        self.cached_candidates = {}

        self.indicators = { }
        server = indicate.indicate_server_ref_default()
        server.set_type("message.instant")
        server.set_desktop_file(os.path.join(os.getcwd(), "review-tools.desktop"))
        server.connect("server-display", server_display)
        server.show()

        self.launchpad = config.get_launchpad("review-notifier")
        self.me = self.launchpad.me

        self.project_idle_ids = {}

        self.config = Preferences()

        if len(self.config.projects) == 0:
            print "No Projects specified"
            sys.exit(1)

        for project in self.config.projects:
            ind = indicate.Indicator()
            ind.set_property("name", project)
            ind.set_property("count", "%d" % 0)
            ind.connect("user-display", indicator_display)
            ind.hide()
            self.indicators[project] = ind

        pynotify.init("Review Notifier")
        self.timeout()

    def timeout(self):
        for project in self.config.projects:
            self.project_idle_ids[project] = gobject.idle_add(self.project_idle, project)

        return True

    def project_idle (self, project):
        lp_project = None
        lp_focus = None
        try:
            lp_project = self.launchpad.projects[project]
            focus = lp_project.development_focus.branch
        except AttributeError:
            print "Project %s has no development focus." % project
            return False
        except KeyError:
            print "Project %s not found." % project
            return False

        if not focus:
            print "Project %s has no development focus." % project
            return False

        trunk = focus

        if trunk.landing_candidates:
            self.indicators[project].show()
            for c in trunk.landing_candidates:
                gobject.idle_add(self.landing_idle, project, c)
        else:
            self.indicators[project].hide()

        return False

    def landing_idle (self, project, c):
        c_name = c.source_branch.unique_name
        status = None
        try:
            status = self.cached_candidates[c_name]
        except KeyError:
            status = None

        # If the proposal hasn't changed, get on with it
        if status and status == c.queue_status:
            return False

        self.cached_candidates[c_name] = c.queue_status

        n = pynotify.Notification("Review Notification")
        updated = False

        # Source and target branch URIs
        source = c.source_branch.display_name
        target = c.target_branch.display_name

        if c.queue_status == "Needs review":
            # First time we see the branch
            n.update("Branch Proposal",
                     "%s has proposed merging %s into %s." % (
                    c.registrant.display_name, source, target),
                     ICON_NAME)
            updated = True
        elif c.queue_status == "Approved":
            # Branch was approved
            n.update("Branch Approval",
                     "%s was approved for merging into %s." % (
                    source, target),
                     ICON_NAME)
            udpated = True
        elif c.queue_status == "Rejected":
            # Branch was rejected
            n.update("Branch Rejected",
                     """The proposal to merge %s into %s has been rejected.""" % (
                    source, target),
                     ICON_NAME)
            updated = True
        elif c.queue_status == "Merged":
            # Code has landed in the target branch
            n.update("Branch Merged",
                     "%s has been merged into %s." % (source,
                                                      target),
                     ICON_NAME)
            updated = True
        else:
            print "%s status is %s." % (source, c.queue_status)

        if updated:
            n.set_urgency(pynotify.URGENCY_LOW)
            n.set_hint("x-canonical-append", "allow")
            n.show()
            self.indicators[project].set_property_time("time", time())
        else:
            n.close()

    def run(self):
        self.id = gobject.timeout_add_seconds(5 * 60, self.timeout)
        gtk.main()


if __name__ == "__main__":
      gobject.threads_init()
      gtk.gdk.threads_init()
      try:
            foo = Main()
            gtk.gdk.threads_enter()
            foo.run()
            gtk.gdk.threads_leave()
      except KeyboardInterrupt:
            gtk.main_quit()