#!/usr/bin/env python
from __future__ import print_function
import argparse
import sys

parser = argparse.ArgumentParser(
    description='Add certificates to Ignition configuration files.')
parser.add_argument('-t', '--template', metavar='T', type=str, required=True,
                    help='template file to use')

args = parser.parse_args()

if not args.template.endswith(".ct.tmpl"):
    print ("The template file should end with .ct.tmpl")
    sys.exit(-1)

with open(args.template) as f:
    contents = f.read().split('\n')

with open(args.template[:-len(".tmpl")], "w") as f:
    for x in contents:
        try:
            col = x.index("###")
            colspace = " " * (col - 1)
        except Exception:
            f.write(x + "\n")
            continue

        subfile = x[col + 3:]
        with open(subfile) as c:
            subcontents = c.read().split('\n')

        if x[col - 1] == '|':
            for cline in subcontents:
                f.write(colspace + cline + "\n")
        elif x[col - 1] == '-':
            f.write(x[:(col - 1)] + "".join(subcontents) + "\n")
        else:
            print("Unknown qualifier in %s", x)
            sys.exit(-1)