# -*- python -*-
# -*- coding: utf-8 -*-
#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2011-2016       Serge Noiraud
#
# 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.
#

#-------------------------------------------------------------------------
#
# Python modules
#
#-------------------------------------------------------------------------
from math import pi
from gi.repository import GObject

#------------------------------------------------------------------------
#
# Set up logging
#
#------------------------------------------------------------------------
import logging
_LOG = logging.getLogger("maps.selectionlayer")

#-------------------------------------------------------------------------
#
# Gramps Modules
#
#-------------------------------------------------------------------------

#-------------------------------------------------------------------------
#
# osmGpsMap
#
#-------------------------------------------------------------------------

try:
    import gi
    gi.require_version('OsmGpsMap', '1.0')
    from gi.repository import OsmGpsMap as osmgpsmap
except:
    raise

# pylint: disable=unused-argument

class SelectionLayer(GObject.GObject, osmgpsmap.MapLayer):
    """
    This class is used to select an area on the map
    """
    def __init__(self):
        """
        Initialize thz selection layer
        """
        GObject.GObject.__init__(self)
        self.circles = []
        self.rectangles = []

    def add_circle(self, rds, lat, lon):
        """
        Add a circle
        """
        self.circles.append((rds, lat, lon))

    def add_rectangle(self, cp1, cp2):
        """
        Add a rectangle
        """
        self.rectangles.append((cp1, cp2))

    def do_draw(self, gpsmap, ctx):
        """
        draw the circles and the rectangles
        """
        for circle in self.circles:
            top_left = osmgpsmap.MapPoint.new_degrees(circle[1] + circle[0],
                                                   circle[2] - circle[0])
            bottom_right = osmgpsmap.MapPoint.new_degrees(circle[1] - circle[0],
                                                       circle[2] + circle[0])
            center = osmgpsmap.MapPoint.new_degrees(circle[1], circle[2])
            crd_x, crd_y = gpsmap.convert_geographic_to_screen(top_left)
            crd_x2, crd_y2 = gpsmap.convert_geographic_to_screen(bottom_right)
            crd_xc, crd_yc = gpsmap.convert_geographic_to_screen(center)
            width = float(crd_x2 - crd_x)
            height = float(crd_y2 - crd_y)
            ctx.save()
            ctx.translate(crd_xc, crd_yc)
            ctx.set_line_width(3.0)
            ctx.set_source_rgba(0.0, 0.0, 0.0, 0.8)
            ctx.scale(1.0, (height/width))
            ctx.arc(float(0.0), float(0.0), width, 0.0, 2*pi)
            ctx.stroke()
            ctx.restore()

        for rectangle in self.rectangles:
            top_left, bottom_right = rectangle
            ctx.set_source_rgba(0.0, 0.0, 0.0, 0.8)
            ctx.set_line_width(3.0)
            crd_x, crd_y = gpsmap.convert_geographic_to_screen(top_left)
            crd_x2, crd_y2 = gpsmap.convert_geographic_to_screen(bottom_right)
            # be sure when can select a region in all case.
            if crd_x < crd_x2:
                if crd_y < crd_y2:
                    ctx.rectangle(crd_x, crd_y, crd_x2 - crd_x, crd_y2 - crd_y)
                else:
                    ctx.rectangle(crd_x, crd_y2, crd_x2 - crd_x, crd_y - crd_y2)
            else:
                if crd_y < crd_y2:
                    ctx.rectangle(crd_x2, crd_y, crd_x - crd_x2, crd_y2 - crd_y)
                else:
                    ctx.rectangle(crd_x2, crd_y2, crd_x - crd_x2,
                                  crd_y - crd_y2)
            ctx.stroke()

    def do_render(self, gpsmap):
        """
        render the layer
        """
        pass

    def do_busy(self):
        """
        set the map busy
        """
        return False

    def do_button_press(self, gpsmap, gdkeventbutton):
        """
        Someone press a button
        """
        return False

GObject.type_register(SelectionLayer)

