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

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from ConfigParser import ConfigParser, DEFAULTSECT, NoOptionError, \
        NoSectionError
from zenmapCore.UmitLogging import log


class UmitConfigParser(ConfigParser):

    def __init__(self, *args):
        self.filenames = None
        self.failed = False
        ConfigParser.__init__(self, *args)

    def set(self, section, option, value):
        if not self.has_section(section):
            self.add_section(section)

        ConfigParser.set(self, section, option, value)
        self.save_changes()

    def read(self, filename):
        log.debug(">>> Trying to parse: %s" % filename)

        if ConfigParser.read(self, filename):
            self.filenames = filename

        return self.filenames

    def save_changes(self):
        if self.filenames:
            log.debug("saving to %s" % self.filenames)
            try:
                fp = open(self.filenames, 'w')
            except Exception as e:
                self.failed = e
                log.error(">>> Can't save to %s: %s" % (self.filenames, e))
                return
            self.write(fp)
            self.failed = False
        else:
            log.debug(">>> UmitConfigParser can't save changes: no filename")

    def write(self, fp):
        '''Write alphabetically sorted config files'''
        if self._defaults:
            fp.write("[%s]\n" % DEFAULTSECT)

            items = self._defaults.items()
            items.sort()

            for (key, value) in items:
                fp.write("%s = %s\n" % (key, str(value).replace('\n', '\n\t')))
            fp.write("\n")

        sects = self._sections.keys()
        sects.sort()

        for section in sects:
            fp.write("[%s]\n" % section)
            for (key, value) in self._sections[section].items():
                if key != "__name__":
                    fp.write("%s = %s\n" %
                             (key, str(value).replace('\n', '\n\t')))
            fp.write("\n")


def test_umit_conf_content(filename):
    parser = ConfigParser()
    parser.read(filename)

    # Paths section
    section = "paths"
    assert get_or_false(parser, section, "nmap_command_path")


def get_or_false(parser, section, option):
    try:
        result = parser.get(section, option)
        return result
    except NoOptionError:
        return False
    except NoSectionError:
        return False
