# This file is part of Tryton.  The COPYRIGHT file at the top level of
# this repository contains the full copyright notices and license terms.
import configparser
import logging
import os
import urllib.parse
from getpass import getuser

__all__ = ['config', 'get_hostname', 'get_port', 'split_netloc',
    'parse_listen', 'parse_uri']
logger = logging.getLogger(__name__)

# Needed so urlunsplit to always set netloc
for backend_name in ['postgresql', 'sqlite']:
    if backend_name not in urllib.parse.uses_netloc:
        urllib.parse.uses_netloc.append(backend_name)


def get_hostname(netloc):
    if '[' in netloc and ']' in netloc:
        return netloc.split(']')[0][1:]
    elif ':' in netloc:
        return netloc.split(':')[0]
    else:
        return netloc


def get_port(netloc):
    netloc = netloc.split(']')[-1]
    return int(netloc.split(':')[1])


def split_netloc(netloc):
    return get_hostname(netloc).replace('*', ''), get_port(netloc)


def parse_listen(value):
    for netloc in value.split(','):
        yield split_netloc(netloc)


def parse_uri(uri):
    return urllib.parse.urlparse(uri)


class TrytonConfigParser(configparser.ConfigParser):

    def __init__(self):
        super().__init__(interpolation=None)
        self.add_section('web')
        self.set('web', 'listen', 'localhost:8000')
        self.set('web', 'root', os.path.join(os.path.expanduser('~'), 'www'))
        self.set('web', 'num_proxies', '0')
        self.set('web', 'cache_timeout', str(60 * 60 * 12))
        self.add_section('database')
        self.set('database', 'uri',
            os.environ.get('TRYTOND_DATABASE_URI', 'sqlite://'))
        self.set('database', 'path', os.path.join(
                os.path.expanduser('~'), 'db'))
        self.set('database', 'list', 'True')
        self.set('database', 'retry', '5')
        self.set('database', 'language', 'en')
        self.set('database', 'timeout', str(30 * 60))
        self.set('database', 'subquery_threshold', str(1_000))
        self.add_section('request')
        self.set('request', 'max_size', str(2 * 1024 * 1024))
        self.set('request', 'max_size_authenticated',
            str(2 * 1024 * 1024 * 1024))
        self.set('request', 'timeout', str(60))
        self.add_section('cache')
        self.set('cache', 'transaction', '10')
        self.set('cache', 'model', '200')
        self.set('cache', 'record', '2000')
        self.set('cache', 'field', '100')
        self.set('cache', 'default', '1024')
        self.set('cache', 'ir.message', '10240')
        self.set('cache', 'ir.translation', '10240')
        self.add_section('queue')
        self.set('queue', 'worker', 'False')
        self.add_section('ssl')
        self.add_section('email')
        self.set('email', 'uri', 'smtp://localhost:25')
        self.set('email', 'from', getuser())
        self.add_section('session')
        self.set('session', 'authentications', 'password')
        self.set('session', 'max_age', str(60 * 60 * 24 * 30))
        self.set('session', 'timeout', str(60 * 5))
        self.set('session', 'max_attempt', '5')
        self.set('session', 'max_attempt_ip_network', '300')
        self.set('session', 'ip_network_4', '32')
        self.set('session', 'ip_network_6', '56')
        self.add_section('password')
        self.set('password', 'length', '8')
        self.set('password', 'reset_timeout', str(24 * 60 * 60))
        self.add_section('bus')
        self.set('bus', 'allow_subscribe', 'False')
        self.set('bus', 'long_polling_timeout', str(5 * 60))
        self.set('bus', 'cache_timeout', '5')
        self.set('bus', 'select_timeout', '5')
        self.add_section('html')
        self.update_environ()
        self.update_etc()

    def update_environ(self):
        for key, value in os.environ.items():
            if not key.startswith('TRYTOND_'):
                continue
            try:
                section, option = key[len('TRYTOND_'):].lower().split('__', 1)
            except ValueError:
                continue
            if section.startswith('wsgi_'):
                section = section.replace('wsgi_', 'wsgi ')
            if not self.has_section(section):
                self.add_section(section)
            self.set(section, option, value)

    def update_etc(self, configfile=os.environ.get('TRYTOND_CONFIG')):
        if isinstance(configfile, str):
            configfile = [configfile]
        if not configfile or not [_f for _f in configfile if _f]:
            return []
        configfile = [os.path.expanduser(filename) for filename in configfile]
        read_files = self.read(configfile)
        logger.info('using %s as configuration files', ', '.join(read_files))
        if configfile != read_files:
            logger.error('could not load %s',
                ','.join(set(configfile) - set(read_files)))
        return configfile

    def get(self, section, option, *args, **kwargs):
        default = kwargs.pop('default', None)
        try:
            return configparser.RawConfigParser.get(self, section, option,
                *args, **kwargs)
        except (configparser.NoOptionError, configparser.NoSectionError):
            return default

    def getint(self, section, option, *args, **kwargs):
        default = kwargs.pop('default', None)
        try:
            return configparser.RawConfigParser.getint(self, section, option,
                *args, **kwargs)
        except (configparser.NoOptionError, configparser.NoSectionError,
                TypeError):
            return default

    def getfloat(self, section, option, *args, **kwargs):
        default = kwargs.pop('default', None)
        try:
            return configparser.RawConfigParser.getfloat(self, section, option,
                *args, **kwargs)
        except (configparser.NoOptionError, configparser.NoSectionError,
                TypeError):
            return default

    def getboolean(self, section, option, *args, **kwargs):
        default = kwargs.pop('default', None)
        try:
            return configparser.RawConfigParser.getboolean(
                self, section, option, *args, **kwargs)
        except (configparser.NoOptionError, configparser.NoSectionError,
                AttributeError):
            return default


config = TrytonConfigParser()