import os
import sys
import random
import re
import urllib
from Config import *
from Pb import Pb

import simplejson as json
from PIL import Image
import uuid

_fuse_mode="Pin_Light"

class PbPattern(Pb):
    example_params = {
    #    "pattern_url" : "http://asdf.us/impattern/patterns/1.png",
         "pattern_data" : '{"matrix":[["0","0","0","0","0","1","0","0","0","0"],["0","0","0","0","1","1","1","0","0","0"],["0","0","1","1","1","0","1","0","0","0"],["0","1","1","0","0","0","0","0","0","0"],["0","1","0","0","1","0","0","0","0","0"],["0","1","0","0","1","0","0","0","1","0"],["0","1","0","0","1","1","0","0","1","0"],["0","1","0","0","0","1","1","1","1","0"],["0","1","1","1","1","0","0","0","0","0"],["0","0","0","0","1","0","0","0","0","0"]],"width":"10","height":"10"}',
    #    "username" : "garfield",
         "image_url" : "http://i.asdf.us/im/be/PinkHijab_1425078647_reye.gif",
    } 
    def __init__(self, **kwargs): 
        super(PbPattern,self).__init__(**kwargs);
        _definitions = {
          'image_url': { 'type':'img_url' },
          'pattern_url': { 'type':'img_url' },
          'pattern_data': { 'type':'raw' },
          'username': { 'type':'string' },
        }
        self.params.definitions_import(_definitions, kwargs, classname=self.__class__.__name__);
        self.filename, self.filepath = self._filename_filepath_create(url=self.params.image_url['url'], extension=self.params.image_url['mimetype'])
        _pattern_filename, self._pattern_filepath = self._filename_filepath_create(namepart="pattern")

        if self.params.pattern_data: self._from_pattern_data()
        elif not self.params.pattern_url:
            self.err_warn("pattern must be supplied as json array or as a png url")

        self._db_url_param = str(self.params.image_url)

    def _from_pattern_data(self):
        def boolToColor(boolean):
            if boolean:
                return (0,0,0,255);
            else:
                return (255,255,255,255)
        specs = json.loads(str(self.params.pattern_data));
        if int(specs['width']) > 100 or int(specs['height']) > 100:
            raise ValueError
            sys.stderr.write("height and width need to be less than 100 px")
        img = Image.new('RGBA', (int(specs['width']), int(specs['height'])));
        pixels = img.load();
        for i in range(0, len(specs['matrix'])):
            for j in range(0, len(specs['matrix'][i])):
              pixels[j,i] = boolToColor(int(specs['matrix'][i][j]));

        img.save(self._pattern_filepath, "PNG")
        
    #first step
    def _make_canvas(self):
        _width, _height = self._dimensions(self.params.image_url['path']) # same here
        cmd = [BIN_CONVERT, "-size", _width + "x" + _height, "canvas:transparent", self.filepath]
        self._call_cmd(cmd)

    #second step use the Canvas as a background
    def _make_mask(self):
        #tile the pattern pattern on the canvas
        cmd = [BIN_COMPOSITE,"-tile", self._pattern_filepath, self.filepath, self.filepath];
        self._call_cmd(cmd)
        #fuse the tiled file to create a mask
        #convert thebg.gif -compose Dst_In null: thefile.gif -matte -layers composite new.gif
        cmd = [BIN_CONVERT, self.filepath, "-compose", "Dst_In", "null:", 
            self.params.image_url['path'], "-matte", "-layers", "composite", self.filepath]
        self._call_cmd(cmd)
    
    #third step
    def _fuse_mask(self, fuse_mode=_fuse_mode):
        cmd = [BIN_CONVERT, "-dispose", "2", self.filepath, "null:", 
            self.params.image_url['path'], "-matte", "-compose", fuse_mode, "-layers", "composite", 
            self.filepath]
        self._call_cmd(cmd)

    def create(self):
        self._make_canvas();
        self._make_mask()
        self._fuse_mask();