# Copyright (C) 2007, One Laptop Per Child
#
# 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 St, Fifth Floor, Boston, MA  02110-1301  USA

import logging
import time
import os
from gettext import gettext as _

from gi.repository import Gio
from gi.repository import GConf
from gi.repository import Gtk

from sugar3.activity import activityfactory
from sugar3.activity.activityhandle import ActivityHandle
from sugar3.graphics.icon import get_icon_file_name
from sugar3.graphics.xocolor import XoColor
from sugar3.graphics.alert import ConfirmationAlert
from sugar3 import mime
from sugar3.bundle.activitybundle import ActivityBundle
from sugar3.bundle.bundle import AlreadyInstalledException
from sugar3.bundle.contentbundle import ContentBundle
from sugar3 import util

from jarabe.view import launcher
from jarabe.model import bundleregistry, shell
from jarabe.journal.journalentrybundle import JournalEntryBundle
from jarabe.journal import model
from jarabe.journal import journalwindow


def _get_icon_for_mime(mime_type):
    generic_types = mime.get_all_generic_types()
    for generic_type in generic_types:
        if mime_type in generic_type.mime_types:
            file_name = get_icon_file_name(generic_type.icon)
            if file_name is not None:
                return file_name

    icons = Gio.content_type_get_icon(mime_type)
    logging.debug('icons for this file: %r', icons.props.names)
    for icon_name in icons.props.names:
        file_name = get_icon_file_name(icon_name)
        if file_name is not None:
            return file_name


def get_icon_name(metadata):
    file_name = None

    bundle_id = metadata.get('activity', '')
    if not bundle_id:
        bundle_id = metadata.get('bundle_id', '')

    if bundle_id:
        activity_info = bundleregistry.get_registry().get_bundle(bundle_id)
        if activity_info:
            file_name = activity_info.get_icon()

    if file_name is None and is_activity_bundle(metadata):
        file_path = model.get_file(metadata['uid'])
        if file_path is not None and os.path.exists(file_path):
            try:
                bundle = ActivityBundle(file_path)
                file_name = bundle.get_icon()
            except Exception:
                logging.exception('Could not read bundle')

    if file_name is None:
        file_name = _get_icon_for_mime(metadata.get('mime_type', ''))

    if file_name is None:
        file_name = get_icon_file_name('application-octet-stream')

    return file_name


def get_date(metadata):
    """ Convert from a string in iso format to a more human-like format. """
    if 'timestamp' in metadata:
        try:
            timestamp = float(metadata['timestamp'])
        except (TypeError, ValueError):
            logging.warning('Invalid timestamp: %r', metadata['timestamp'])
        else:
            return util.timestamp_to_elapsed_string(timestamp)

    if 'mtime' in metadata:
        try:
            ti = time.strptime(metadata['mtime'], '%Y-%m-%dT%H:%M:%S')
        except (TypeError, ValueError):
            logging.warning('Invalid mtime: %r', metadata['mtime'])
        else:
            return util.timestamp_to_elapsed_string(time.mktime(ti))

    return _('No date')


def get_bundle(metadata):
    try:
        if is_activity_bundle(metadata):
            file_path = model.get_file(metadata['uid'])
            if not os.path.exists(file_path):
                logging.warning('Invalid path: %r', file_path)
                return None
            return ActivityBundle(file_path)

        elif is_content_bundle(metadata):
            file_path = model.get_file(metadata['uid'])
            if not os.path.exists(file_path):
                logging.warning('Invalid path: %r', file_path)
                return None
            return ContentBundle(file_path)

        elif is_journal_bundle(metadata):
            file_path = model.get_file(metadata['uid'])
            if not os.path.exists(file_path):
                logging.warning('Invalid path: %r', file_path)
                return None
            return JournalEntryBundle(file_path)
        else:
            return None
    except Exception:
        logging.exception('Incorrect bundle')
        return None


def _get_activities_for_mime(mime_type):
    registry = bundleregistry.get_registry()
    result = registry.get_activities_for_type(mime_type)
    if not result:
        for parent_mime in mime.get_mime_parents(mime_type):
            for activity in registry.get_activities_for_type(parent_mime):
                if activity not in result:
                    result.append(activity)
    return result


def get_activities(metadata):
    activities = []

    bundle_id = metadata.get('activity', '')
    if bundle_id:
        activity_info = bundleregistry.get_registry().get_bundle(bundle_id)
        if activity_info:
            activities.append(activity_info)

    mime_type = metadata.get('mime_type', '')
    if mime_type:
        activities_info = _get_activities_for_mime(mime_type)
        for activity_info in activities_info:
            if activity_info not in activities:
                activities.append(activity_info)

    return activities


def resume(metadata, bundle_id=None):
    registry = bundleregistry.get_registry()

    if is_activity_bundle(metadata) and bundle_id is None:

        logging.debug('Creating activity bundle')

        file_path = model.get_file(metadata['uid'])
        bundle = ActivityBundle(file_path)
        if not registry.is_installed(bundle):
            logging.debug('Installing activity bundle')
            try:
                registry.install(bundle)
            except AlreadyInstalledException:
                _downgrade_option_alert(bundle)
                return
        else:
            logging.debug('Upgrading activity bundle')
            registry.upgrade(bundle)

        _launch_bundle(bundle)

    elif is_content_bundle(metadata) and bundle_id is None:

        logging.debug('Creating content bundle')

        file_path = model.get_file(metadata['uid'])
        bundle = ContentBundle(file_path)
        if not bundle.is_installed():
            logging.debug('Installing content bundle')
            bundle.install()

        activities = _get_activities_for_mime('text/html')
        if len(activities) == 0:
            logging.warning('No activity can open HTML content bundles')
            return

        uri = bundle.get_start_uri()
        logging.debug('activityfactory.creating with uri %s', uri)

        activity_bundle = registry.get_bundle(activities[0].get_bundle_id())
        launch(activity_bundle, uri=uri)
    else:
        activity_id = metadata.get('activity_id', '')

        if bundle_id is None:
            activities = get_activities(metadata)
            if not activities:
                logging.warning('No activity can open this object, %s.',
                        metadata.get('mime_type', None))
                return
            bundle_id = activities[0].get_bundle_id()

        bundle = registry.get_bundle(bundle_id)

        if metadata.get('mountpoint', '/') == '/':
            object_id = metadata['uid']
        else:
            object_id = model.copy(metadata, '/')

        launch(bundle, activity_id=activity_id, object_id=object_id,
                color=get_icon_color(metadata))


def _launch_bundle(bundle):
    registry = bundleregistry.get_registry()
    logging.debug('activityfactory.creating bundle with id %r',
                       bundle.get_bundle_id())
    installed_bundle = registry.get_bundle(bundle.get_bundle_id())
    if installed_bundle:
        launch(installed_bundle)
    else:
        logging.error('Bundle %r is not installed.',
                    bundle.get_bundle_id())


def launch(bundle, activity_id=None, object_id=None, uri=None, color=None,
           invited=False):
    if activity_id is None or not activity_id:
        activity_id = activityfactory.create_activity_id()

    logging.debug('launch bundle_id=%s activity_id=%s object_id=%s uri=%s',
            bundle.get_bundle_id(), activity_id, object_id, uri)

    shell_model = shell.get_model()
    activity = shell_model.get_activity_by_id(activity_id)
    if activity is not None:
        logging.debug('re-launch %r', activity.get_window())
        activity.get_window().activate(Gtk.get_current_event_time())
        return

    if color is None:
        client = GConf.Client.get_default()
        color = XoColor(client.get_string('/desktop/sugar/user/color'))

    launcher.add_launcher(activity_id, bundle.get_icon(), color)
    activity_handle = ActivityHandle(activity_id=activity_id,
            object_id=object_id, uri=uri, invited=invited)
    activityfactory.create(bundle, activity_handle)


def _downgrade_option_alert(bundle):
    alert = ConfirmationAlert()
    alert.props.title = _('Older Version Of %s Activity') % (bundle.get_name())
    alert.props.msg = _('Do you want to downgrade to version %s') % \
                        bundle.get_activity_version()
    alert.connect('response', _downgrade_alert_response_cb, bundle)
    journalwindow.get_journal_window().add_alert(alert)
    alert.show()


def _downgrade_alert_response_cb(alert, response_id, bundle):
    if response_id is Gtk.ResponseType.OK:
        journalwindow.get_journal_window().remove_alert(alert)
        registry = bundleregistry.get_registry()
        registry.install(bundle, force_downgrade=True)
        _launch_bundle(bundle)
    elif response_id is Gtk.ResponseType.CANCEL:
        journalwindow.get_journal_window().remove_alert(alert)


def is_activity_bundle(metadata):
    mime_type = metadata.get('mime_type', '')
    return mime_type == ActivityBundle.MIME_TYPE


def is_content_bundle(metadata):
    return metadata.get('mime_type', '') == ContentBundle.MIME_TYPE


def is_journal_bundle(metadata):
    return metadata.get('mime_type', '') == JournalEntryBundle.MIME_TYPE


def is_bundle(metadata):
    return is_activity_bundle(metadata) or is_content_bundle(metadata) or \
            is_journal_bundle(metadata)


def get_icon_color(metadata):
    if metadata is None or not 'icon-color' in metadata:
        client = GConf.Client.get_default()
        return XoColor(client.get_string('/desktop/sugar/user/color'))
    else:
        return XoColor(metadata['icon-color'])