import re


def syntax():
    '''regex setup for the flat syntax'''
    # titles
    t = re.compile('\(.*\)')
    # sections
    s = re.compile('\[(.*?)\]')
    # notes
    n = re.compile('(-->)')
    # comments
    c = re.compile('(>>)')
    return (t, s, n, c)


def parse(file):
    with open(file, 'r') as f:

        parsed = {}
        current_title = ''
        current_section = ''

        t, s, n, c = syntax()

        line = f.readline()

        while line:
            if not line.rstrip('\n'):
                line = f.readline()
                continue
            # titles
            if t.match(line):
                current_title = line[1:-2]
                parsed[current_title] = {}
                line = f.readline()
                continue
            # sections
            if s.match(line):
                current_section = line[1:-2]
                parsed[current_title][current_section] = ''
                line = f.readline()
                continue
            # notes (TBD)
            if n.match(line):
                parsed[current_title][current_section] += line.rstrip(
                    '\n') + ' \n'
                line = f.readline()
                continue
            # normal text
            parsed[current_title][current_section] += line.rstrip('\n') + ' \n'
            line = f.readline()
        return parsed