# -*- coding: utf-8 -*-

import os
import sys
import yaml
import re
import getpass
from yunohost import YunoHostError, YunoHostLDAP, validate, colorize, get_required_args, win_msg
from yunohost_domain import domain_add

def tools_ldapinit(args): 
    """
    Initialize YunoHost LDAP scheme
    
    Keyword arguments:
        args
    
    Returns: 
        dict

    """
    with YunoHostLDAP() as yldap:

        with open('ldap_scheme.yml') as f: 
            ldap_map = yaml.load(f)

        for rdn, attr_dict in ldap_map['parents'].items():
            yldap.add(rdn, attr_dict)

        for rdn, attr_dict in ldap_map['childs'].items():
            yldap.add(rdn, attr_dict)
 
        domain_add({ 'domain' : [args['domain']] })

        admin_dict = {
            'cn': 'admin',
            'uid': 'admin',
            'description': 'LDAP Administrator',
            'gidNumber': '1007',
            'uidNumber': '1007',
            'homeDirectory': '/home/admin',
            'loginShell': '/bin/bash',
            'objectClass': ['organizationalRole', 'posixAccount', 'simpleSecurityObject']
        }

        yldap.update('cn=admin', admin_dict)

    win_msg(_("LDAP has been successfully initialized"))


def tools_adminpw(args): 
    """
    Change admin password
    
    Keyword arguments:
        args
    
    Returns: 
        dict

    """
    # Validate password length
    if len(args['new']) < 4:
        raise YunoHostError(22, _("Password is too short"))

    result = os.system('ldappasswd -h localhost -D cn=admin,dc=yunohost,dc=org -w "'+ args['old'] +'" -a "'+ args['old'] +'" -s "' + args['new'] + '"')

    if result == 0:
        win_msg(_("Admin password has been changed"))
    else:
        raise YunoHostError(22, _("Invalid password"))


def tools_maindomain(args): 
    """
    Change admin password
    
    Keyword arguments:
        args
    
    Returns: 
        dict

    """
    if not args['old_domain']:
        with open('/usr/share/yunohost/yunohost-config/others/current_host', 'r') as f:
            args['old_domain'] = f.readline().rstrip()

    validate(r'^([a-zA-Z0-9]{1}([a-zA-Z0-9\-]*[a-zA-Z0-9])*)(\.[a-zA-Z0-9]{1}([a-zA-Z0-9\-]*[a-zA-Z0-9])*)*(\.[a-zA-Z]{1}([a-zA-Z0-9\-]*[a-zA-Z0-9])*)$', args['old_domain'])

    config_files = [
        '/etc/postfix/main.cf',
        '/etc/dovecot/dovecot.conf',
        '/etc/mailname',
        '/etc/ejabberd/ejabberd.cfg',
        '/etc/lemonldap-ng/lemonldap-ng.ini',
        '/etc/hosts',
    ]

    config_dir = [
        '/var/lib/lemonldap-ng/conf',
        '/etc/apache2/sites-available',
    ]

    for dir in config_dir:
        for file in os.listdir(dir):
            config_files.append(dir + '/' + file)

    for file in config_files:
        with open(file, "r") as sources:
            lines = sources.readlines()
        with open(file, "w") as sources:
            for line in lines:
                sources.write(re.sub(r''+ args['old_domain'] +'', args['new_domain'], line))

    os.system('/etc/init.d/hostname.sh')
    
    # Regenerate certificate
    tmp = '/usr/share/yunohost/yunohost-config'
    a = os.system('echo "01" > '+ tmp +'/ssl/yunoCA/serial')
    b = os.system('rm '+ tmp +'/ssl/yunoCA/index.txt')
    c = os.system('touch '+ tmp +'/ssl/yunoCA/index.txt')
    d = os.system('sed -i "s/' + args['old_domain'] + '/' + args['new_domain'] + '/g" '+ tmp +'/ssl/yunoCA/openssl.cnf')
    e = os.system('openssl req -x509 -new -config '+ tmp +'/ssl/yunoCA/openssl.cnf -days 3650 -out '+ tmp +'/ssl/yunoCA/ca/cacert.pem -keyout '+ tmp +'/ssl/yunoCA/ca/cakey.pem -nodes -batch')
    f = os.system('openssl req -new -config '+ tmp +'/ssl/yunoCA/openssl.cnf -days 730 -out '+ tmp +'/ssl/yunoCA/certs/yunohost_csr.pem -keyout '+ tmp +'/ssl/yunoCA/certs/yunohost_key.pem -nodes -batch')
    g = os.system('openssl ca -config '+ tmp +'/ssl/yunoCA/openssl.cnf -days 730 -in '+ tmp +'/ssl/yunoCA/certs/yunohost_csr.pem -out '+ tmp +'/ssl/yunoCA/certs/yunohost_crt.pem -batch')
    h = os.system('cp '+ tmp +'/ssl/yunoCA/ca/cacert.pem /etc/ssl/certs/ca-yunohost_crt.pem')
    i = os.system('cp '+ tmp +'/ssl/yunoCA/certs/yunohost_key.pem /etc/ssl/private/')
    j = os.system('cp '+ tmp +'/ssl/yunoCA/newcerts/01.pem /etc/ssl/certs/yunohost_crt.pem')
    k = os.system('cp '+ tmp +'/ssl/yunoCA/newcerts/01.pem /etc/ejabberd/ejabberd.pem')
    l = os.system('echo '+ args['new_domain'] +' > /usr/share/yunohost/yunohost-config/others/current_host')

    # Restart services
    m = os.system('service apache2 restart')
    n = os.system('service postfix restart')
    o = os.system('service ejabberd restart')

    if a == b == c == d == e == f == g == h == i == j == k == l == m == n == o == 0:
        win_msg(_("YunoHost main domain has been successfully changed"))
    else:
        raise YunoHostError(17, _("There were a problem during domain changing"))


def tools_postinstall(args):
    """
    Post-install configuration
    
    Keyword arguments:
        args
    
    Returns: 
        dict

    """
    with YunoHostLDAP(password='yunohost') as yldap:
        try:
            with open('/usr/share/yunohost/yunohost-config/others/installed') as f: pass
        except IOError:
            print('Installing YunoHost')
        else:
            raise YunoHostError(17, _("YunoHost is already installed"))

        # New domain config
        tools_maindomain({ 'old_domain' : 'yunohost.org', 'new_domain' : args['domain']})

        # Initialize YunoHost LDAP base
        tools_ldapinit(args)

        # Change LDAP admin password
        tools_adminpw({ 'old' : 'yunohost', 'new' : args['password']})

        os.system('touch /usr/share/yunohost/yunohost-config/others/installed')
    
    win_msg(_("YunoHost has been successfully configured"))