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, 
          pattern_url=None,
          pattern_data=None,
          username=None,
          image_url=None,
        ):
        super(PbPattern,self).__init__();

        self.params.set_val("image_url", url, value_type="img_url");
        self.params.set_val("pattern_url", url, value_type="img_url");
        self.params.set_val("pattern_data", url, value_type="json");
        self.params.set_val("username", username, value_type="string");

        self.basename, self._format = self._get_filename();
        #FIXME omit file extension for downloaded files
        #lets go back to this in a second
        self._pattern_file = os.path.join(WORKING_DIR, "IMPATTERNTMP_PTN{}_{}.{}".format(self.basename, self._pid, self._format)) # this

        self._download(self.params.image_url, self._downloaded_file)

        self.filename = "{}.{}".format(self.basename, self._format)
        self.filepath = os.path.join(WORKING_DIR, self.filename) 

        if self.params['pattern_url']:
            self._download(self.params['pattern_url'], self._pattern_file)
        elif self.params['pattern_data']:
            self._from_pattern_data()
        else:
            sys.stderr.write("pattern must be supplied as json array or as a png url")
            raise ValueError;

    def _from_pattern_data(self):
        def boolToColor(boolean):
            if boolean:
                return (0,0,0,255);
            else:
                return (255,255,255,255)
        specs = json.loads(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_file, "PNG")
        
    #first step
    def _make_canvas(self):
        _width, _height = self.dimensions(self._downloaded_file) # 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_file, 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._downloaded_file, "-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._downloaded_file, "-matte", "-compose", fuse_mode, "-layers", "composite", 
            self.filepath]
        self._call_cmd(cmd)

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