#!/usr/bin/env python
# -*- coding: utf-8 -*-

# This file is part of Beremiz, a Integrated Development Environment for
# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
#
# Copyright (C) 2012: Edouard TISSERANT and Laurent BESSARD
#
# See COPYING file for copyrights details.
#
# 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.


from __future__ import absolute_import
import os

import wx

# -------------------------------------------------------------------------------
#                            Library Structures
# -------------------------------------------------------------------------------

BitmapLibrary = {}
BitmapFolders = []

# -------------------------------------------------------------------------------
#                             Library Helpers
# -------------------------------------------------------------------------------


def AddBitmapFolder(path):
    if os.path.exists(path) and os.path.isdir(path) and path not in BitmapFolders:
        BitmapFolders.append(path)


def SearchBitmap(bmp_name):
    for folder in BitmapFolders:
        bmp_path = os.path.join(folder, bmp_name + ".png")
        if os.path.isfile(bmp_path):
            return wx.Bitmap(bmp_path)
    return None


def GetBitmap(bmp_name1, bmp_name2=None, size=None):
    bmp = BitmapLibrary.get((bmp_name1, bmp_name2, size))
    if bmp is not None:
        return bmp

    if bmp_name2 is None:
        bmp = SearchBitmap(bmp_name1)
    else:
        # Bitmap with two icon
        bmp1 = SearchBitmap(bmp_name1)
        bmp2 = SearchBitmap(bmp_name2)

        if bmp1 is not None and bmp2 is not None:
            # Calculate bitmap size
            width = bmp1.GetWidth() + bmp2.GetWidth() - 1
            height = max(bmp1.GetHeight(), bmp2.GetHeight())

            # Create bitmap with both icons
            bmp = wx.EmptyBitmap(width, height)
            dc = wx.MemoryDC()
            dc.SelectObject(bmp)
            dc.Clear()
            dc.DrawBitmap(bmp1, 0, 0)
            dc.DrawBitmap(bmp2, bmp1.GetWidth() - 1, 0)
            dc.Destroy()

        elif bmp1 is not None:
            bmp = bmp1
        elif bmp2 is not None:
            bmp = bmp2

    if bmp is not None:
        BitmapLibrary[(bmp_name1, bmp_name2, size)] = bmp

    return bmp