#!/usr/bin/env python3
# coding=utf-8
#
# Copyright 2016 Ville Rantanen
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

"""Color by ${X} notation."""

__author__ = "Ville Rantanen <ville.q.rantanen@gmail.com>"
__version__ = "0.1"

import sys, os, argparse, re
from argparse import ArgumentParser

sys.path.append(os.path.dirname(os.path.realpath(__file__)))
import ansicodes as ansi


def setup_options():
    """ Create command line options """
    usage = (
        """
Color notation renderer in ANSI codes
Special syntaxes:
    * Colors: insert string ${X}, where X values in the table below.

"""
        + ansi.demo()
    )

    parser = ArgumentParser(
        description=usage,
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog=__author__,
    )

    parser.add_argument("-v", "--version", action="version", version=__version__)
    parser.add_argument(
        "--no-color",
        "-n",
        action="store_false",
        dest="color",
        default=True,
        help="Disable color.",
    )
    parser.add_argument(
        "-z",
        action="store_true",
        dest="zero",
        default=False,
        help="Reset coloring at the end of each line.",
    )
    parser.add_argument(
        "-Z",
        action="store_false",
        dest="zero_final",
        default=True,
        help="Disable reset of colors at the end of file.",
    )
    parser.add_argument("filename", type=str, help="File to show, - for stdin")
    opts = parser.parse_args()
    return opts


bc = ansi.code()
opts = setup_options()
if opts.filename == "-":
    f = sys.stdin
else:
    f = open(opts.filename, "r")
for row in f:
    if not row:
        continue
    if type(row) == bytes:
        row = row.decode("utf-8")
    row = row.rstrip("\n\r ")
    if opts.color:
        colored = bc.color_string(row)
    else:
        colored = bc.nocolor_string(row)
    sys.stdout.write(colored)
    if opts.zero and opts.color:
        sys.stdout.write(bc.Z)
    sys.stdout.write("\n")
if opts.zero_final and opts.color:
    sys.stdout.write(bc.Z)