#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
import jinja2
import optparse
import os
import sys

BASEPATH = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', '..'))
sys.path.insert(0, BASEPATH)

import reqif


if __name__ == '__main__':
    parser = optparse.OptionParser("usage: %prog reqif_file")
    parser.add_option("-t", "--template", dest="template", default=os.path.join(BASEPATH, 'reqif', 'templates', 'tex', 'requirement_specification.tex'), help="path to the template")
    (options, args) = parser.parse_args()

    #
    # Check options and args
    if len(args) != 1 or not os.path.isfile(args[0]):
        parser.print_help()
    else:
        reqif_path = args[0]
        template_path = os.path.abspath(options.template)
        output_path = os.path.splitext(reqif_path)[0] + os.path.splitext(template_path)[1]
        if reqif_path == output_path:
            sys.exit('ERROR: Source and Destination would be the same file')
        #
        reqif_data = reqif.reqif_dict(reqif_path, 'Heading', 'Software Specification')
        #
        with open(output_path, 'w') as fh:
            jenv = jinja2.Environment(loader=jinja2.FileSystemLoader(os.path.dirname(template_path)))
            template = jenv.get_template(os.path.basename(template_path))
            fh.write(template.render(data=reqif_data))