#!/usr/bin/env python3
#
# Version 1.0.1
#
#############################################################################
# Change log:
#  7 May  2019, Ondrej Tuma, Initial
#  9 June 2020, 3d-gussner, Added version and Change log
#  9 June 2020, 3d-gussner, Wrap text to 20 char and rows
#  9 June 2020, 3d-gussner, colored output
#  2 Apr. 2021, 3d-gussner, Fix and improve text warp
# 22 Apr. 2021, DRracer, add English source to output
#############################################################################
#
"""Check lang files."""
from argparse import ArgumentParser
from traceback import print_exc
from sys import stdout, stderr
import textwrap

def color_maybe(color_attr, text):
    if stdout.isatty():
        return '\033[0;' + str(color_attr) + 'm' + text + '\033[0m'
    else:
        return text

red = lambda text: color_maybe(31, text)
green = lambda text: color_maybe(32, text)
yellow = lambda text: color_maybe(33, text)


def print_wrapped(wrapped_text, rows, cols):
    if type(wrapped_text) == str:
        wrapped_text = [wrapped_text]
    for r, line in enumerate(wrapped_text):
        r_ = str(r + 1).rjust(3)
        if r >= rows:
            r_ = color_maybe(31, r_)
        print((' {} |{:' + str(cols) + 's}|').format(r_, line))

def print_truncated(text, cols):
    if len(text) <= cols:
        prefix = text.ljust(cols)
        suffix = ''
    else:
        prefix = text[0:cols]
        suffix = color_maybe(31, text[cols:])
    print('   |' + prefix + '|' + suffix)


def parse_txt(lang, no_warning):
    """Parse txt file and check strings to display definition."""
    if lang == "en":
        file_path = "lang_en.txt"
    else:
        file_path = "lang_en_%s.txt" % lang

    print(green("Start %s lang-check" % lang))

    lines = 1
    with open(file_path) as src:
        while True:
            comment = src.readline().split(' ')
            #print (comment) #Debug

#Check if columns and rows are defined
            cols = None
            rows = None
            for item in comment[1:]:
                key, val = item.split('=')
                if key == 'c':
                    cols = int(val)
                    #print ("c=",cols) #Debug
                elif key == 'r':
                    rows = int(val)
                    #print ("r=",rows) #Debug
                else:
                    raise RuntimeError(
                        "Unknown display definition %s on line %d" %
                        (' '.join(comment), lines))
            if cols is None and rows is None:
                if not no_warning:
                    print(yellow("[W]: No display definition on line %d" % lines))
                cols = len(translation)     # propably fullscreen
            if rows is None:
                rows = 1
            elif rows > 1 and cols != 20:
                print(yellow("[W]: Multiple rows with odd number of columns on line %d" % lines))

#Wrap text to 20 chars and rows
            source = src.readline()[:-1].strip('"')
            #print (source) #Debug
            translation = src.readline()[:-1].strip('"')
            if translation == '\\x00':
                # crude hack to handle intentionally-empty translations
                translation = ''
            #print (translation) #Debug
            wrapped_source = list(textwrap.TextWrapper(width=cols).wrap(source))
            rows_count_source = len(wrapped_source)
            wrapped_translation = list(textwrap.TextWrapper(width=cols).wrap(translation))
            rows_count_translation = len(wrapped_translation)
#End wrap text

            # Check for potential errors in the definition
            if rows == 1 and (len(source) > cols or rows_count_source > rows):
                print(yellow('[W]: Source text longer than %d cols as defined on line %d:' % (cols, lines)))
                print_truncated(source, cols)
                print()
            elif rows_count_source > rows:
                print(yellow('[W]: Wrapped source text longer than %d rows as defined on line %d:' % (rows, lines)))
                print_wrapped(wrapped_source, rows, cols)
                print()

            # Check for translation lenght
            if (rows_count_translation > rows) or (rows == 1 and len(translation) > cols):
                print(red('[E]: Text is longer then definition on line %d: rows diff=%d cols=%d rows=%d'
                          % (lines, rows_count_translation-rows, cols, rows)))
                if rows == 1:
                    print(yellow(' source text:'))
                    print_truncated(source, cols)
                    print(yellow(' translated text:'))
                    print_truncated(translation, cols)
                else:
                    print(yellow(' source text:'))
                    print_wrapped(wrapped_source, rows, cols)
                    print(yellow(' translated text:'))
                    print_wrapped(wrapped_translation, rows, cols)
                print()

            if len(src.readline()) != 1:  # empty line
                break
            lines += 4
    print(green("End %s lang-check" % lang))


def main():
    """Main function."""
    parser = ArgumentParser(
        description=__doc__,
        usage="%(prog)s lang")
    parser.add_argument(
        "lang", nargs='?', default="en", type=str,
        help="Check lang file (en|cs|de|es|fr|nl|it|pl)")
    parser.add_argument(
        "--no-warning", action="store_true",
        help="Disable warnings")

    args = parser.parse_args()
    try:
        parse_txt(args.lang, args.no_warning)
        return 0
    except Exception as exc:
        print_exc()
        parser.error("%s" % exc)
        return 1


if __name__ == "__main__":
    exit(main())