import os
import ConfigParser
import sys

homedir = os.getenv("HOME")
if homedir is None:
    homedir = os.path.dirname(sys.argv[0])

class _Configuration(object):
    def __init__(self):
        self.filename = os.path.join(os.path.join(homedir, ".4grab"), "config.cfg")
        self.configparser = ConfigParser.RawConfigParser()
        if not os.path.exists(self.filename):
            self.create_new()
        else:
            self.configparser.read(self.filename)

    def create_new(self):
        self.configparser.add_section("settings")
        self.set_category(self.raw_input_with_default("w", "Please enter which category you would like to download from: "))
        
        self.configparser.add_section("locations")
        self.configparser.set("locations", "download", self.raw_input_with_default(os.path.join(homedir, "Pictures"), "Please enter where you would like the downloads to go: "))

        self.save()

    def raw_input_with_default(self, default, prompt):
        inp = raw_input("%s (default=%s): " % (prompt, default))
        if inp == "":
            return default
        return inp

    def get_download_location(self):
        return self.configparser.get("locations", "download")

    def get_category(self):
        return self.configparser.get("settings", "category")

    def set_category(self, value):
        self.configparser.set("settings", "category", value)

    def option_exists(self, option):
        for section in self.configparser.sections():
            if self.configparser.has_option(section, option):
                return True
        return False

    def save(self):
        dirname = os.path.dirname(self.filename)
        if not os.path.exists(dirname):
            os.mkdir(dirname)
        configfile = open(self.filename, "w")
        self.configparser.write(configfile)

_configuration = _Configuration()
def Configuration(): return _configuration