#!/usr/bin/env python3
#
# Copyright (C) 2023 Jonathan A. Poritz
# 
# 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 3 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.
#
import argparse
import re
import sys
import warnings
if not sys.warnoptions:
    warnings.simplefilter("ignore")
#
# setting up arguments
#
parser = argparse.ArgumentParser(description='Shows class names and corresponding colors for GD HTML color-designating class from an html file such as the "book.html" from unzipping a GD ".html, zipped" download; ignores black')
parser.add_argument("inputfile", help="File containing html from which to extract color class info", type=argparse.FileType('r'))
#
# define helper functions and regular expressions
#
def color_escape(r, g, b):
  return '\033[{};2;{};{};{}m'.format(38, r, g, b)
classdefpat=re.compile(r'\.c[1-9][0-9]?[0-9]?\{[^\}]*color:#[^\}]*\}')
colorclasspat=re.compile(r'[\{,;]color:#')
colorpat=re.compile("color:#([0-9abcdefABCDEF]{6,6});?")
classpat=re.compile("\.(c[1-9][0-9]?[0-9]?){")
#
# read file contents
#
book=parser.parse_args().inputfile.read()
#
# find all class definitions
#
classdefs=classdefpat.findall(book)
#
# exclude class defs without color def
#
colorclasses=[]
for s in classdefs:
  if not colorclasspat.search(s):
    continue
  colorclasses.append(s)
#
# exclude those whose color is black
#
notblackcolorclasses=[]
for s in colorclasses:
  if s.count("color:#000000"):
    continue
  notblackcolorclasses.append(s)
#
# display appropriate infor for remaining color-defining class defs
#
for s in notblackcolorclasses:
  for t in colorpat.finditer(s):
    g=t.group(1)
    red=int(g[0:2],16)
    green=int(g[2:4],16)
    blue=int(g[4:6],16)
    classname=classpat.search(s).group(1)
    print(classname+": "+" "*(4-len(classname))+color_escape(red, green, blue) + '\x1b[48;2;255;255;255m' + " ■■■■■■ "+g+" " + '\033[0m')
    xtrastyle=colorpat.sub("",classpat.sub("",s))[:-1]
    if len(xtrastyle):
      print("extra styling: "+xtrastyle)
    print("")