# Copyright (C) 2000-2001 The OpenRPG Project
#
#    openrpg-dev@lists.sourceforge.net
#
# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
# --
#
# File: mapper/fog.py
# Author: OpenRPG Team
#
# Description: Maintenance of data structures required for FoW
#

import sys
from base import *
from random import Random
from region import *
from xml.etree.ElementTree import Element, tostring
import traceback
COURSE = 10

class FogArea:
    def __init__(self, outline, log):
        self.log = log
        self.outline = outline

    def set_fog_props(self, str):
        self.outline = str

    def points_to_elements(self, points=None):
        result = []
        if points == None:
            return result

        for pairs in string.split( points, ';' ):
            pair = string.split( pairs, ',' )
            p = Element( "point" )
            p.set( "x", pair[0] )
            p.set( "y", pair[1] )
            result.append( p )
        return result

    def toxml(self, action="update"):
        xml_str = ""
        localOutline = self.outline
        if localOutline != None and localOutline != "all" and localOutline != "none":
            localOutline = "points"
        elem = Element( "poly" )
        if action == "del":
            elem.set( "action", action )
            elem.set( "outline", localOutline )
            if localOutline == 'points':
                foglist = self.points_to_elements( self.outline )
                for p in foglist: elem.append( p )
            return tostring(elem)
        elem.set( "action", action )
        if  localOutline != None:
            elem.set( "outline", localOutline )
            if localOutline == 'points':
                foglist = self.points_to_elements( self.outline )
                for p in foglist: elem.append( p )
        #xml_str = elem.toxml()
        return tostring(elem)

class fog_layer(layer_base):
    def __init__(self, canvas):
        self.canvas = canvas
        self.log = component.get('log')
        layer_base.__init__(self)
        self.color = wx.Color(128, 128, 128)
        self.fogregion = wx.Region()
        self.fogregion.Clear()
        self.fog_bmp = None
        self.width = 0
        self.height = 0
        self.use_fog = False
        self.last_role = ""

    def clear(self):
        self.fogregion.Clear()
        self.use_fog = True
        self.del_area("all")
        self.recompute_fog()

    def remove_fog(self):
        self.fogregion.Clear()
        self.use_fog = False
        self.del_area("all")
        self.add_area("none")
        self.fog_bmp = None

    def resize(self, size):
        try:
            if self.width == size[0] and self.height == size[1]: return
            self.recompute_fog()
        except: pass

    def recompute_fog(self):
        if not self.use_fog:
            return
        size = self.canvas.size
        self.width = size[0]
        self.height = size[1]
        self.fog_bmp = wx.EmptyBitmap(self.width,self.height)
        self.fill_fog()

    def fill_fog(self):
        if not self.use_fog: return
        mdc = wx.MemoryDC()
        mdc.SelectObject(self.fog_bmp)
        mdc.SetPen(wx.TRANSPARENT_PEN)
        if (self.canvas.frame.session.role == "GM"): color = self.color
        else: color = wx.BLACK
        self.last_role = self.canvas.frame.session.role
        mdc.SetBrush(wx.Brush(color,wx.SOLID))
        mdc.DestroyClippingRegion()
        mdc.DrawRectangle(0, 0, self.width+2, self.height+2)
        mdc.SetBrush(wx.Brush(wx.WHITE, wx.SOLID))
        if self.fogregion.GetBox().GetWidth()>0:
            mdc.SetClippingRegionAsRegion(self.fogregion)
            mdc.DrawRectangle(0, 0, self.width+2, self.height+2)
        mdc.SelectObject(wx.NullBitmap)
        del mdc

    def layerDraw(self, dc, topleft, size):
        if self.fog_bmp == None or not self.fog_bmp.Ok() or not self.use_fog: return
        if self.last_role != self.canvas.frame.session.role: self.fill_fog()
        mdc = wx.MemoryDC()
        mdc.SelectObject(self.fog_bmp)
        dc.Blit(0, 0, self.canvas.size[0], self.canvas.size[1], mdc, 0, 0, wx.AND)
        mdc.SelectObject(wx.NullBitmap)
        del mdc

    def createregn2(self, polyline, mode, show):
        regn = self.scanConvert(polyline)
        area = ""
        for i in polyline:
            if (area != ""): area += ";"
            area += str(i.X) + "," + str(i.Y)
        if mode == 'new':
            if self.fogregion.IsEmpty(): self.fogregion = regn
            else: self.fogregion.UnionRegion(regn)
            self.add_area(area, show)
        else:
            if not self.fogregion.IsEmpty(): self.fogregion.SubtractRegion(regn)
            else:
                self.fogregion = wx.Region(0, 0, self.canvas.size[0], self.canvas.size[1])
                self.fogregion.SubtractRegion(regn)
            self.del_area(area, show)

    def createregn(self, polyline, mode, show="Yes"):
        if not self.use_fog and mode == 'del':
            self.clear()
            self.canvas.Refresh(False)
        if self.use_fog:
            self.createregn2(polyline, mode, show)
            self.fill_fog()

    def scanConvert(self, polypt):
        regn = wx.Region()
        regn.Clear()
        list = IRegion().scan_Convert(polypt)
        for i in list:
            if regn.IsEmpty(): regn = wx.Region(i.left*COURSE, i.y*COURSE, i.right*COURSE+1-i.left*COURSE, 1*COURSE)
            else: regn.Union(i.left*COURSE, i.y*COURSE, i.right*COURSE+1-i.left*COURSE, 1*COURSE)
        return regn

    def add_area(self, area="", show="Yes"):
        poly = FogArea(area, self.log)
        xml_str = "<map><fog>"
        xml_str += poly.toxml("new")
        xml_str += "</fog></map>"
        if show == "Yes": self.canvas.frame.session.send(xml_str)

    def del_area(self, area="", show="Yes"):
        poly = FogArea(area, self.log)
        xml_str = "<map><fog>"
        xml_str += poly.toxml("del")
        xml_str += "</fog></map>"
        if show == "Yes": self.canvas.frame.session.send(xml_str)

    def layerToXML(self, action="update"):
        if not self.use_fog: return ""
        fog_string = ""
        ri = wx.RegionIterator(self.fogregion)
        if not (ri.HaveRects()): fog_string = FogArea("all", self.log).toxml("del")
        while ri.HaveRects():
            x1 = ri.GetX()/COURSE
            x2 = x1+(ri.GetW()/COURSE)-1
            y1 = ri.GetY()/COURSE
            y2 = y1+(ri.GetH()/COURSE)-1
            poly = FogArea(str(x1) + "," + str(y1) + ";" +
                          str(x2) + "," + str(y1) + ";" +
                          str(x2) + "," + str(y2) + ";" +
                          str(x1) + "," + str(y2), self.log)
            fog_string += poly.toxml(action)
            ri.Next()
        if fog_string:
            s = "<fog"
            s += ">"
            s += fog_string
            s += "</fog>"
            return s
        else: return ""

    def layerTakeDOM(self, xml_dom):
        try:
            if not self.use_fog:
                self.use_fog = True
                self.recompute_fog()
            serial = xml_dom.get('serial')
            if serial != None: self.serial_number = int(serial)
            children = xml_dom.getchildren()
            for l in children:
                action = l.get("action")
                outline = l.get("outline")
                if (outline == "all"):
                    polyline = [IPoint().make(0,0), IPoint().make(self.width-1, 0),
                              IPoint().make(self.width-1, self.height-1),
                              IPoint().make(0, self.height-1)]
                elif (outline == "none"):
                    polyline = []
                    self.use_fog = 0
                    self.fog_bmp = None
                else:
                    polyline = []
                    lastx = None
                    lasty = None
                    list = l.getchildren()
                    for point in list:
                        x = point.get( "x" )
                        y = point.get( "y" )
                        if (x != lastx or y != lasty):
                            polyline.append(IPoint().make(int(x), int(y)))
                        lastx = x
                        lasty = y
                if (len(polyline) > 1): self.createregn2(polyline, action, "No")
            self.fill_fog()
        except: pass