# Copyright (C) 2010, Aleksey Lim
#
# 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 gtk
import gobject
import logging

from jarabe.journal.homogeneview import HomogeneView
from jarabe.journal.homogeneview import Cell
from jarabe.journal.fields import *
from jarabe.journal import preview
from jarabe.journal import entry


class _Cell(Cell):

    def __init__(self, use_details):
        Cell.__init__(self)

        self._last_thumb_uid = None
        self._last_thumb_offset = None
        self._last_thumb_mtime = None

        self.padding = style.DEFAULT_SPACING

        cell = gtk.HBox()
        self.add(cell)

        # toolbar

        toolbar = gtk.VBox()
        toolbar.set_size_request(style.GRID_CELL_SIZE / 2, -1)
        cell.pack_start(toolbar, expand=False)

        keep = KeepIcon()
        toolbar.pack_start(keep, expand=False)
        self.add_field(keep)

        if use_details:
            details = DetailsIcon()
            toolbar.pack_start(details, expand=False)
            self.add_field(details)

        # image widgets

        self._icon = ObjectIcon(
                detail=use_details,
                paint_border=True,
                paint_fill=True,
                pixel_size=style.MEDIUM_ICON_SIZE)
        self._icon.set_size_request(preview.THUMB_WIDTH, preview.THUMB_HEIGHT)
        self._icon.show()
        self.add_field(self._icon)

        self._thumb = Thumb(
                detail=use_details,
                paint_border=False,
                paint_fill=True)
        self._thumb.set_size_request(preview.THUMB_WIDTH, preview.THUMB_HEIGHT)
        self._thumb.show()
        self.add_field(self._thumb)

        # image box

        table = gtk.Table(3, 4, False)
        table.props.row_spacing = style.DEFAULT_PADDING
        cell.pack_end(table)

        left_padding = gtk.EventBox()
        table.attach(left_padding, 0, 1, 0, 2, gtk.EXPAND, gtk.SHRINK, 0, 0)

        self._image = gtk.EventBox()
        table.attach(self._image, 1, 2, 0, 1, gtk.SHRINK, gtk.SHRINK, 0, 0)

        right_padding = gtk.EventBox()
        table.attach(right_padding, 2, 3, 0, 2, gtk.EXPAND, gtk.SHRINK, 0, 0)

        padding = gtk.EventBox()
        padding.props.visible_window = False
        padding.set_size_request(style.GRID_CELL_SIZE / 2, -1)
        table.attach(padding, 3, 4, 0, 1, gtk.SHRINK, gtk.SHRINK, 0, 0)

        # text box

        title = Title(max_line_count=2)
        table.attach(title, 1, 4, 1, 2, gtk.EXPAND | gtk.FILL, gtk.SHRINK, 0, 0)
        self.add_field(title)

        date = Timestamp()
        table.attach(date, 1, 4, 2, 3, gtk.EXPAND | gtk.FILL, gtk.SHRINK, 0, 0)
        self.add_field(date)

        self.show_all()

    def fill_in(self, offset, metadata):
        if self._last_thumb_offset != offset or \
                self._last_thumb_uid != metadata.get('uid') or \
                self._last_thumb_mtime != metadata.get('timestamp'):
            self._set_thumb_widget(self._icon)
            self._last_thumb_offset = None
            self._last_thumb_uid = metadata.get('uid')
            self._last_thumb_mtime = metadata.get('timestamp')
            preview.fetch(offset, metadata)
        else:
            self._set_thumb_widget(self._thumb)

    def fill_pixbuf_in(self, offset, pixbuf):
        self._last_thumb_offset = offset
        self._thumb.set_from_pixbuf(pixbuf)
        self._set_thumb_widget(self._thumb)

    def _set_thumb_widget(self, widget):
        if widget is self._image.child:
            return
        if self._image.child is not None:
            self._image.remove(self._image.child)
        self._image.add(widget)


class ThumbsView(HomogeneView):

    def __init__(self, selection):
        HomogeneView.__init__(self, selection)

        if not selection:
            padding = style.GRID_CELL_SIZE / 2 - style.DEFAULT_PADDING
            self.padding_left = padding
            self.padding_right = padding

        cell_width  = style.DEFAULT_SPACING * 2 + \
                      style.GRID_CELL_SIZE + \
                      preview.THUMB_WIDTH

        cell_height = style.DEFAULT_SPACING * 2 + \
                      preview.THUMB_HEIGHT + \
                      style.DEFAULT_PADDING * 2 + \
                      entry.TEXT_HEIGHT * 3

        self.cell_size = (cell_width, cell_height)

        self.connect('frame-scrolled', self.__frame_scrolled_cb)
        preview.fetched.connect(self.__preview_fetched_cb)

    def do_cell_new(self):
        return _Cell(not self.hover_selection)

    def __frame_scrolled_cb(self, table):
        preview.discard_queue(table.frame_range)

    def __preview_fetched_cb(self, sender, signal, offset, pixbuf):
        cell = self.get_cell(offset)
        if cell is not None:
            cell.fill_pixbuf_in(offset, pixbuf)
            self.refill([offset])