#!/usr/bin/env python
# -*- coding: iso-8859-1 -*-
# iso-8859-1,latin-1,utf-8
# convert foswiki format to latex

# imports
from sys import argv,exit

# get input file name
try:
    inFile = argv[1]
except IndexError:
    print 'Usage:'
    print argv[0], 'inFile'
    exit(1)


# function to make strings fit for laTeX
def latex_mystring(mystring):
    """Convert a string to a laTeX-readable format"""
    mystring = mystring.replace('_',r"\_")
    mystring = mystring.replace('&',r"\&")
#    mystring = mystring.replace('$',r"\$")
    mystring = mystring.replace('%',r"\%")
    mystring = mystring.replace('#',r"\#")
    mystring = mystring.replace('~',r"\~{}")
    mystring = mystring.replace('ä',r'\"a')
    mystring = mystring.replace('ö',r'\"o')
    mystring = mystring.replace('ü',r'\"u')
#    mystring = mystring.replace(u'\u00FC',r'\"u')
#    mystring = mystring.replace(u'\xfc',r'\"u')
#    mystring = mystring.replace('\xc3\xbc',r'\"u')
    mystring = mystring.replace('Ä',r'\"A')
    mystring = mystring.replace('Ö',r'\"O')
    mystring = mystring.replace('Ü',r'\"U')
    mystring = mystring.replace('ß',r'\ss{}')
    mystring = mystring.replace('ê',r'\^e')
    mystring = mystring.replace('í',r'\'i')
    mystring = mystring.replace('â',r'\^a')
    mystring = mystring.replace('å',r'\aa{}')
#    mystring = mystring.replace(r'\n',r'\\*')
    mystring = mystring.replace(r'\n',', ')
    return mystring


# function for replacements
def convert_foswiki2latex(oldLine):
    """Convert a foswiki line to latex"""
    # transfer to new variable
    newLine = oldLine
    # replace section heading format
    if newLine.find('---++++') != -1:
        # there is no corresponding level in latex article style; just change to bold face and add empty line afterwards
        newLine = newLine.replace('---++++ ',r'\textbf{')
        newLine = newLine[:-1] + '}' + '\n\n'
    elif line.find('---+++') != -1:
        newLine = newLine.replace('---+++ ',r'\subsubsection{')
        newLine = newLine[:-1] + '}' + '\n'
    elif line.find('---++') != -1:
        newLine = newLine.replace('---++ ',r'\subsection{')
        newLine = newLine[:-1] + '}' + '\n'
    elif line.find('---+') != -1:
        newLine = newLine.replace('---+ ',r'\section{')
        newLine = newLine[:-1] + '}' + '\n'
    # itemize environment -- must be before bold face!
    # attention: spacing before item matters for internal handling of enumerate/itemize in this script. do not change!
    newLine = newLine.replace('      * ',r'   \item ') # second-level itemize
    newLine = newLine.replace('   * ',r' \item ') # first-level itemize
    # enumerate environment
    # attention: spacing before item matters for internal handling of enumerate/itemize in this script. do not change!
    newLine = newLine.replace('      1 ',r'  \item ') # second-level itemize
    newLine = newLine.replace('   1 ',r'\item ') # first-level itemize

    # bold face -- keep after itemize!
    while newLine.rfind('*') != -1:  # while there are asterisks
        newLine = newLine.replace('*',r'\textbf{',1)  # replace first instance
        newLine = newLine.replace('*',r'}',1)  # replace second instance
#    # italics
#    while newLine.rfind('_') != -1:  # while there are asterisks
#        newLine = newLine.replace('_',r'\emph{',1)  # replace first instance
#        newLine = newLine.replace('_',r'}',1)  # replace second instance
    # special characters
    newLine = latex_mystring(newLine)
    # verbatim environment
    newLine = newLine.replace('<verbatim>',r'\begin{verbatim}')
    newLine = newLine.replace('</verbatim>',r'\end{verbatim}')
    # comment areas
    newLine = newLine.replace('<!--',r'%')
    newLine = newLine.replace('-->',r'%')
    # done
    return newLine
        
# read input file
inObj = open(inFile,'r')
#from codecs import open
#inObj = open(inFile,'r',"utf-8")
inLines = inObj.readlines()
inObj.close()


# write output file header (all writing to standard out)
print r'\documentclass[a4paper]{article}'
print r'\begin{document}'
print ' '
print ' '


# replace stuff in file
# itemize/enumerate environment flags
isItem1 = False
isItem2 = False
isEnum1 = False
isEnum2 = False
for line in inLines:
    newLine = convert_foswiki2latex(line)
#    newLine = unicode(newLine,"iso-8859-1")
    # if for itemize/enumerate wrappers
    # itemize 1
    if not isItem1:
        if newLine[:6] == ' \item':  # itemize 1
            isItem1 = True
            newLine = r'\begin{itemize}' + '\n' + newLine
    else:
        if newLine[:6] != ' \item':
            isItem1 = False
            newLine = r'\end{itemize}' + '\n' + newLine
    # itemize 2
    if not isItem2:
        if newLine[:8] == '   \item':  # itemize 2
            isItem2 = True
            newLine = r'\begin{itemize}' + '\n' + newLine
    else:
        if newLine[:8] != '   \item':
            isItem2 = False
            newLine = r'\end{itemize}' + '\n' + newLine
    # enum 1
    if not isEnum1:
        if newLine[:5] == '\item':  # enum 1
            isEnum1 = True
            newLine = r'\begin{enumerate}' + '\n' + newLine
    else:
        if newLine[:5] != '\item':
            isEnum1 = False
            newLine = r'\end{enumerate}' + '\n' + newLine
    # enum 2
    if not isEnum2:
        if newLine[:7] == '  \item':  # enum 2
            isEnum2 = True
            newLine = r'\begin{enumerate}' + '\n' + newLine
    else:
        if newLine[:7] != '  \item':
            isEnum2 = False
            newLine = r'\end{enumerate}' + '\n' + newLine
    # write new line to latex file
    print newLine[:-1]  # drop the new line character
    
#        if newLine[:8] == '   \item':  # itemize 2
#        if newLine[:7] == '  \item':  # enum 2
#        if newLine[:6] == ' \item':  # itemize 1
#        if newLine[:5] == '\item':  # enum 1
        

# write output file footer
print ' '
print ' '
print '\end{document}'