#!/usr/bin/python2.7
import os
import sys
import random
import re
import urllib
import inspect
from Config import *
from Pb import Pb
from Params import Params

DEFAULT_FINALFORMAT = "png";

_subtle_break_mark = 'pron'
_extreme_break_mark = 'sugar'

_header_offset = 2000
_default_breakmode = "subtle"

class PbBreak(Pb): #FIXME in db gallery
    example_params = {
        "url" : "http://i.asdf.us/im/de/HolyMountain2_1322275112_seamonkey.gif",
        "breaktype" : "RGB_WASH",
        "finalformat" : "png",
        "breakmode" : "extreme",
        "breakangle" : "10",
        "username" : "donkey",
        "expanded" : "false"
    }
    def __init__(self, **kwargs):
        super(PbBreak,self).__init__(**kwargs);
        _definitions = {
          'username': { 'type': 'string' },
          'breaktype': { 'type': 'string' },
          'breakmode': {
            'type': 'enum',
            'enum_values' : ['subtle', 'extreme', 'gradual'] ,
            'default' : _default_breakmode 
           },
          'breakangle': { 'type': 'float' },
          'expanded': { 'type': 'bool' },
          'url': { 'type': 'img_url' },
          'finalformat': { 'type': 'enum', 'enum_values' : ['png', 'gif', 'jpg' ] }
        }
        self.params.definitions_import(_definitions, kwargs, classname=self.__class__.__name__);
        self._files_created.append(self.params.url.path)
        self.params.breaktype.set_val(self._get_breaktype(str(self.params.breaktype)))
        
        #psd returns an animation
        if not self.params.finalformat and self.params.url.mimetype == "gif":
          self.params.finalformat.set_val("gif")
        elif self.params.breaktype == 'miff':
          self.params.finalformat.set_val("jpg")
          self.params.breakmode.set_val("subtle")
        elif not self.params.finalformat:
          self.params.finalformat.set_val(DEFAULT_FINALFORMAT)  
        self._width_and_height_set(filepath=self.params.url.path)       

        self.filename, self.filepath = self._filename_filepath_create(url=self.params.url.url, extension=self.params.finalformat)
        self._conversion_file = self._tempfilepath_create(namepart="conversion", extension=self.params.breaktype)

        self._db_url_param = str(self.params.url['url'])

    def _get_breaktype(self, key):
        #{{{ conversion table
        breaktypeTranslate = {
            'CLASSIC':'jpg',
            'REDUX':'pcds',
            'BLURRY_BREAK':'viff',
            'BLURRY_BREAK_2':'mat',
            'SWIPE':'miff',
            'RGB_WASH':'psd',
            'RGB_WASH_2':'psb',
            'NOISY_BREAK':'palm',
            'NOISY_BREAK_2':'fig',
            'BROKEN_VIGNETTE':'pbm',
            'FAX_MACHINE':'cals',
            'STRIPES':'exr',
            'PHOTOCOPY':'art',
        }
        #}}}
        return breaktypeTranslate[key]

#{{{#########rotatefunctions#######################################  
    def _rotate(self):
        cmd = [BIN_CONVERT,self.params.url.path,"-rotate",self.params.breakangle,"+repage",self.params.url.path]
        self._call_cmd(cmd) 

    def _rotate_back(self):
        angle = str(360-int(self.params.breakangle))
        cmd = [BIN_CONVERT,self.filepath,"-rotate",angle,"+repage",self.filepath]
        self._call_cmd(cmd) 
        if not self.params.expanded:
            cmd = [BIN_CONVERT,self.filepath,"-gravity","Center","-crop","{}x{}+0+0".format(
                self.width, self.height),"+repage",self.filepath]
            self._call_cmd(cmd) 
#}}}

    def _subtle_break(self):
        #assume the header is no longer than _header_offset bytes
        breakpoint = random.randint(_header_offset, len(self._file_data))
        newfile = self._file_data[0:breakpoint] \
          + _subtle_break_mark \
          + self._file_data[breakpoint:]
        self._file_data = newfile[0:len(self._file_data)]

    def _extreme_break(self):
        increment = len(self._file_data)/10;
        i = 0
        newfile = "";
        for b in self._file_data:
            if i > _header_offset and not (i % increment):
                b += _extreme_break_mark
            newfile += b
            i += 1
        self._file_data = newfile[0:len(self._file_data)]

     
    def _enforce_jpg(self):
        if self.params.breaktype in [ "exr", "bmp", "miff" ] and not re.match(r'jpe?g$', self.params.url.mimetype, re.IGNORECASE):
            jpg_file = self._tempfilepath_create(extension="jpg")
            self._call_cmd([BIN_CONVERT,self.params.url.path, jpg_file])
            self._files_created.append(jpg_file)
            self._conversion_file = jpg_file

    def _first_conversion(self):
        if self.params.url.mimetype == self.params.breaktype:
            self._conversion_file = self.params.url.path
            return
        self._call_cmd([BIN_CONVERT, self.params.url.path, self._conversion_file])
        self._files_created.append(self._conversion_file)

    def _prepare_filedata(self):
        if self.params.url.mimetype == "gif" and self.params.breaktype not in [ 'mat', 'psd' ]: 
            self._choose_gif_frame(self.params.url.path)
        if self.params.breakangle:
            self._rotate()
        self._enforce_jpg(); 
        self._first_conversion();
        self._file_data = self._file_read(self._conversion_file)
        if not self._file_data:
          self.err_warn("Unable to get file data");
   
    def _add_false_data(self):
        if self.params.breakmode == "subtle":
            self._subtle_break()
        elif self.params.breakmode == "extreme":
            self._extreme_break()
        f = open(self._conversion_file, 'w')
        f.write(self._file_data)
        f.close();

    def _final_conversion(self):
        self._call_cmd( [BIN_CONVERT, self._conversion_file, self.filepath])
        def psd_psbfilepath(num):
            return os.path.join(re.sub(r'\.', "-%s." % num, self.filepath))
        if str(self.params.breaktype) == 'psd':
            self._call_cmd(['mv', psd_psbfilepath(1), self.filepath])
            self._files_created.append(psd_psbfilepath(0))
        if str(self.params.breaktype) == 'psb':
            self._call_cmd(['mv', psd_psbfilepath(0), self.filepath])
            self._files_created.append(psd_psbfilepath(1))
        if self.params.breakangle:
            self._rotate_back()

    def create(self):
        self._prepare_filedata();
        self._add_false_data();
        self._final_conversion() 
        self._cleanup()