#!/usr/bin/python
# -*- coding:utf-8 -*-

import argparse
import re
import random
import time
from os import path, makedirs
from jinja2 import Environment, FileSystemLoader

def get_unique_name(base):
    now = time.localtime()
    year = str(now[0])
    month = str(now[1]).rjust(2, '0')
    day = str(now[2]).rjust(2, '0')
    rand = str(randint(0, 100)).rjust(2, '0')
    return '-'.join([base, year, month, day, rand]).decode('utf-8')


def escape_tex(value):
    newval = value
    for pattern, replacement in LATEX_SUBS:
        newval = pattern.sub(replacement, newval)
    return newval


def main():
    parser = argparse.ArgumentParser(description="Préparation du fichier maître tex")
    parser.add_argument('-n', '--name', help="Nom du fichier à créer")
    parser.add_argument('-a', '--author', help="Auteur de la formation")
    parser.add_argument('-t', '--title', help="Titre de la formation")
    parser.add_argument('-d', '--directory', help="Sous-répertoires où créer le fichier")
    args = parser.parse_args()
    
    jinja_loader = FileSystemLoader('./templates')
    jinja_env = Environment(loader=jinja_loader,
                            block_start_string='((*',
                            block_end_string='*))',
                            variable_start_string='(((',
                            variable_end_string=')))',
                            comment_start_string='((=',
                            comment_end_string='=))',
                            trim_blocks=True)
    jinja_env.filters['escape_tex'] = escape_tex

    root = '../'
    if args.directory:
        root = root + re.sub(r'[\w]+/?', '../', args.directory)
    else:
        root = '../'
    
    name = args.name
    if name:
        if path.splitext(name)[1] == '':
            name = name.decode('utf-8') + u'.tex'
    else:
        name = get_unique_name('formation')
    
    title = args.title
    if not title:
        title = u'FIXME'
    else:
        title = title.decode('utf-8')
    
    author = args.author
    if not author:
        author = u'Cadoles'
    else:
        author = author.decode('utf-8')
    
    directory = args.directory
    if not directory:
        directory = ''

    env = {'root': root,
            'title': title,
            'author': author}
    resources = [(path.join('presentations', directory), 'main.tex'),]
                 #('slides', 'license-cc-by-sa-2.0.tex'),
                 #('slides', 'preambule.tex'),
                 #('slides', 'title.tex')]
    for directory, template_file in resources:
        template = jinja_env.get_template(template_file)
        rendered_template = template.render(**env)
        if not path.exists(directory):
            makedirs(directory)
        with open(path.join(directory, name), 'w') as rendered_file:
            rendered_file.write(rendered_template.encode('utf-8'))

                            



if __name__ == '__main__':
    main()