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

from gi.repository import Abi
from gi.repository import GLib

from sugar3.graphics.radiotoolbutton import RadioToolButton
from sugar3.graphics.combobox import ComboBox
from sugar3.graphics.palette import Palette
from sugar3.graphics.toolbutton import ToolButton
from sugar3.graphics.menuitem import MenuItem
from sugar3.datastore import datastore

from sugar3.activity.activity import SCOPE_PRIVATE

logger = logging.getLogger('write-activity')

"""
# The FontCombo is not used anymore, keep the code here for reference
# for a few versions

class FontCombo(ComboBox):

    def __init__(self, abi):
        ComboBox.__init__(self)

        self._has_custom_fonts = False
        self._fonts = sorted(abi.get_font_names())
        self._fonts_changed_id = self.connect('changed', self._font_changed_cb,
                abi)

        for i, f in enumerate(self._fonts):
            self.append_item(i, f, None)
            if f == 'Times New Roman':
                self.set_active(i)

        self._abi_handler = abi.connect('font-family', self._font_family_cb)

    def _font_changed_cb(self, combobox, abi):
        if self.get_active() != -1:
            logger.debug('Setting font: %s', self._fonts[self.get_active()])
            try:
                abi.handler_block(self._abi_handler)
                abi.set_font_name(self._fonts[self.get_active()])
            finally:
                abi.handler_unblock(self._abi_handler)

    def _font_family_cb(self, abi, font_family):
        font_index = -1

        # search for the font name in our font list
        for i, f in enumerate(self._fonts):
            if f == font_family:
                font_index = i
                break

        # if we don't know this font yet, then add it (temporary) to the list
        if font_index == -1:
            logger.debug('Font not found in font list: %s', font_family)
            if not self._has_custom_fonts:
                # add a separator to seperate the non-available fonts from
                # the available ones
                self._fonts.append('')  # ugly
                self.append_separator()
                self._has_custom_fonts = True
            # add the new font
            self._fonts.append(font_family)
            self.append_item(0, font_family, None)
            # see how many fonts we have now, so we can select the last one
            model = self.get_model()
            num_children = model.iter_n_children(None)
            logger.debug('Number of fonts in the list: %d', num_children)
            font_index = num_children - 1

        # activate the found font
        if (font_index > -1):
            self.handler_block(self._fonts_changed_id)
            self.set_active(font_index)
            self.handler_unblock(self._fonts_changed_id)
"""


class FontSizeCombo(ComboBox):

    def __init__(self, abi):
        ComboBox.__init__(self)

        self._abi_handler = abi.connect('font-size', self._font_size_cb)

        self._font_sizes = ['8', '9', '10', '11', '12', '14', '16', '20', \
                            '22', '24', '26', '28', '36', '48', '72']
        self._changed_id = self.connect('changed', self._font_size_changed_cb,
                abi)

        for i, s in enumerate(self._font_sizes):
            self.append_item(i, s, None)
            if s == '12':
                self.set_active(i)

    def _font_size_changed_cb(self, combobox, abi):
        if self.get_active() != -1:
            logger.debug('Setting font size: %d',
                    int(self._font_sizes[self.get_active()]))

            abi.handler_block(self._abi_handler)
            try:
                abi.set_font_size(self._font_sizes[self.get_active()])
            finally:
                abi.handler_unblock(self._abi_handler)

    def _font_size_cb(self, abi, size):
        for i, s in enumerate(self._font_sizes):
            if int(s) == int(size):
                self.handler_block(self._changed_id)
                self.set_active(i)
                self.handler_unblock(self._changed_id)
                break


class AbiButton(RadioToolButton):

    def __init__(self, abi, abi_signal, do_abi_cb, on_abi_cb=None, **kwargs):
        RadioToolButton.__init__(self, **kwargs)

        self._abi_handler = abi.connect(abi_signal, self.__abi_cb,
                abi_signal, on_abi_cb)
        self._toggled_handler = self.connect('toggled', self.__toggled_cb,
                abi, do_abi_cb)

    def __toggled_cb(self, button, abi, do_abi_cb):
        if not button.props.active:
            return

        abi.handler_block(self._abi_handler)
        try:
            logging.debug('Do abi %s' % do_abi_cb)
            do_abi_cb()
        finally:
            abi.handler_unblock(self._abi_handler)

    def __abi_cb(self, abi, prop, abi_signal, on_abi_cb):
        if (on_abi_cb is None and not prop) or \
                (on_abi_cb is not None and not on_abi_cb(abi, prop)):
            return

        self.handler_block(self._toggled_handler)
        try:
            logging.debug('On abi %s prop=%r' % (abi_signal, prop))
            self.set_active(True)
        finally:
            self.handler_unblock(self._toggled_handler)


class ExportButtonFactory():

    _EXPORT_FORMATS = [{'mime_type': 'application/rtf',
                        'title': _('Rich Text (RTF)'),
                        'icon':'save-as-rtf',
                        'jpostfix': _('RTF'),
                        'exp_props': ''},

                       {'mime_type': 'text/html',
                        'title': _('Hypertext (HTML)'),
                        'icon':'save-as-html',
                        'jpostfix': _('HTML'),
                        'exp_props': 'html4:yes; declare-xml:no; ' \
                                      'embed-css:yes; embed-images:yes;'},

                       {'mime_type': 'text/plain',
                        'title': _('Plain Text (TXT)'),
                        'icon':'save-as-txt',
                        'jpostfix': _('TXT'),
                        'exp_props': ''},

                       {'mime_type': 'application/pdf',
                        'title': _('Portable Document Format (PDF)'),
                        'icon':'save-as-pdf',
                        'jpostfix': _('PDF'),
                        'exp_props': ''}]

    def __init__(self, activity, abi):

        toolbar = activity.activity_button.props.page
        for i in self._EXPORT_FORMATS:
            button = ToolButton(i['icon'])
            button.set_tooltip(i['title'])
            button.connect('clicked', self.__clicked_cb, activity, abi, i)
            toolbar.insert(button, -1)
            button.show()

    def __clicked_cb(self, menu_item, activity, abi, format):
        logger.debug('exporting file: %r' % format)

        exp_props = format['exp_props']

        # special case HTML export to set the activity name as the HTML title
        if format['mime_type'] == "text/html":
            exp_props += " title:" + activity.metadata['title'] + ';'

        # create a new journal item
        fileObject = datastore.create()
        act_meta = activity.metadata
        fileObject.metadata['title'] = \
                act_meta['title'] + ' (' + format['jpostfix'] + ')'
        fileObject.metadata['title_set_by_user'] = \
                act_meta['title_set_by_user']
        fileObject.metadata['mime_type'] = format['mime_type']
        fileObject.metadata['fulltext'] = \
                abi.get_content('text/plain', None)[:3000]

        fileObject.metadata['icon-color'] = act_meta['icon-color']

        # don't set application if PDF because Write can't open PDF files
        if format['mime_type'] != 'application/pdf':
            fileObject.metadata['activity'] = act_meta['activity']

        fileObject.metadata['keep'] = act_meta.get('keep', '0')

        preview = activity.get_preview()
        if preview is not None:
            fileObject.metadata['preview'] = dbus.ByteArray(preview)

        fileObject.metadata['share-scope'] = act_meta.get('share-scope',
                                                          SCOPE_PRIVATE)

        # write out the document contents in the requested format
        fileObject.file_path = os.path.join(activity.get_activity_root(),
                'instance', '%i' % time.time())
        abi.save('file://' + fileObject.file_path,
                format['mime_type'], exp_props)

        # store the journal item
        datastore.write(fileObject, transfer_ownership=True)
        fileObject.destroy()
        del fileObject


class DocumentView(Abi.Widget):

    def __init__(self):
        Abi.Widget.__init__(self)
        self.connect('size-allocate', self.__size_allocate_cb)
        self.connect('request-clear-area', self.__request_clear_area_cb)
        self.connect('unset-clear-area', self.__unset_clear_area_cb)
        self.osk_changed = False
        self.dy = 0

    def __shallow_move_cb(self):
        self.moveto_right()
        return False

    def __size_allocate_cb(self, widget, allocation):
        self.set_allocation(allocation)

        if self.get_child() is not None:
            child_allocation = allocation
            child_allocation.y = 0
            child_allocation.x = 0
            child_allocation.height -= self.dy
            self.get_child().size_allocate(allocation)

        if self.osk_changed is True:
            self.moveto_left()
            GLib.timeout_add(100, self.__shallow_move_cb)
            self.osk_changed = False

    def __request_clear_area_cb(self, widget, clear, cursor):
        allocation = widget.get_allocation()
        allocation.x = 0
        allocation.y = 0
        allocation.x, allocation.y = \
                widget.get_window().get_root_coords(allocation.x, allocation.y)

        if clear.y > allocation.y + allocation.height or \
              clear.y + clear.height < allocation.y:
            return False

        self.dy = allocation.y + allocation.height - clear.y

        # Ensure there's at least some room for the view
        if self.dy > allocation.height - 80:
            self.dy = 0
            return False

        self.osk_changed = True
        self.queue_resize()
        return True

    def __unset_clear_area_cb(self, widget, snap_back):
        self.dy = 0
        self.queue_resize()
        return True