###
# Copyright (c) 2021, Georg Pfuetzenreuter
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
#   * Redistributions in binary form must reproduce the above copyright notice,
#     this list of conditions, and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#   * Neither the name of the author of this software nor the name of
#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.

###

import re
import requests
import secrets
import string
from supybot import utils, plugins, ircutils, callbacks, ircmsgs
from supybot.commands import *
from supybot.ircmsgs import nick
try:
    from supybot.i18n import PluginInternationalization
    _ = PluginInternationalization('Keycloak')
except ImportError:
    # Placeholder that allows to run the plugin on a bot
    # without the i18n module
    _ = lambda x: x


class Keycloak(callbacks.Plugin):
    """Interfaces with Keycloak SSO."""
    threaded = True

    def register(self, irc, msg, args, email):
        """<email>
        registers an account with your username and the specified email address"""

        server = self.registryValue('backend.server')
        realm = self.registryValue('backend.realm')
        tokenurl = self.registryValue('backend.token')
        usererr = self.registryValue('replies.error')
        emailverified = self.registryValue('options.emailVerified')
        firstname = self.registryValue('options.firstName')
        lastname = self.registryValue('options.lastName')
        alphabet = string.ascii_letters + string.digits
        random = ''.join(secrets.choice(alphabet) for i in range(64))

        try:
            tokendl = requests.get(tokenurl)
            tokendata = tokendl.json()
            token = tokendata['access_token']
            url = server + '/auth/admin/realms/' + realm + '/users'
        except:
            print("ERROR: Keycloak token could not be installed.")
            irc.error(usererr)
        if re.match(r"[^@]+@[^@]+\.[^@]+", email):
            pw = random
            payload = {
            "firstName": firstname,
            "lastName": lastname,
            "email": email,
            "enabled": "true",
            "username": msg.nick,
            "credentials": [{"type": "password", "value": pw, "temporary": emailverified,}],
            "emailVerified": "false"
            }
            response = requests.post(
            url,
            headers = {'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token},
            json = payload
            )
            print("Keycloak: HTTP Status ", response.status_code)
            try:
                print("Keycloak: Response Text: ", response.text)
            except:
                print("Keycloak: No or invalid response text. This is not an error.")
            try:
                print("Keycloak: Response JSON: ", response.json())
            except:
                print("Keycloak: No or invalid response JSON. This it not an error.")
            status = response.status_code
            if status == 201:
                print(" SSO User " + msg.nick + " created.")
                irc.queueMsg(msg=ircmsgs.IrcMsg(command='PRIVMSG', args=(msg.nick, f'{pw}')))
                irc.reply("OK, I sent you a private message.")
            if status == 400:
                print("ERROR: Keycloak indicated that the request is invalid.")
                irc.error(usererr)
            if status == 401:
                print("ERROR: Fix your Keycloak API credentials and/or client roles, doh.")
                irc.error(usererr)
            if status == 403:
                print("ERROR: Keycloak indicated that the authorization provided is not enough to access the resource.")
                irc.error(usererr)
            if status == 404:
                print("ERROR: Keycloak indicated that the requested resource does not exist.")
                irc.error(usererr)
            if status == 409:
                print("ERROR: Keycloak indicated that the resource already exists or \"some other coonflict when processing the request\" occured.")
                irc.reply("Your username seems to already be registerd.")
            if status == 415:
                print("ERROR: Keycloak indicated that the requested media type is not supported.")
                irc.error(usererr)
            if status == 500:
                print("ERROR: Keycloak indicated that the server could not fullfill the request due to \"some unexpected error \".")
                irc.error(usererr)
        else:
            irc.error("Is that a valid email address?")

    register = wrap(register, ['anything'])

    def ircprom(self, irc, msg, args, option):
        """<option>
        true/on = enable authentication to your IRC account with an SSO account going by the same username --
        false/off = allow authentication to your IRC account ONLY with internal IRC credentials (NickServ) --
        Warning: Enabling this without having an SSO account with the same username as your IRC nickname is a security risk."""

        user = msg.nick
        server = self.registryValue('backend.server')
        realm = self.registryValue('backend.realm')
        tokenurl = self.registryValue('backend.token')
        usererr = self.registryValue('replies.error')
        gid = self.registryValue('options.ircgroup')
        try:
            tokendl = requests.get(tokenurl)
            tokendata = tokendl.json()
            token = tokendata['access_token']
            url = server + '/auth/admin/realms/' + realm + '/users'
            userdata = requests.get(url, params = {'username': user}, headers = {'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token})
            userresp = userdata.json()
            uid = userresp[0]['id']
            print(user, uid)
        except:
            print("ERROR: Keycloak token could not be installed.")
            irc.error(usererr)
        url = server + '/auth/admin/realms/' + realm + '/users/' + uid + '/groups/' + gid
        if option == 'true' or option == 'on' or option == '1':
            choice = 'enable'
        elif option == 'false' or option == 'off' or option == '0':
            choice = 'disable'
        elif option == 'query' or option == 'status':
            choice = 'query'
        else:
            choice = 'faulty'
        if choice == 'enable':
            response = requests.put(
            url,
            headers = {'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token})
        if choice == 'disable':
            response = requests.delete(
            url,
            headers = {'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token})
        if choice == 'enable' or choice == 'disable':
            try:
                print("Keycloak: HTTP Status ", response.status_code)
                try:
                    print("Keycloak: Response Text: ", response.text)
                except:
                    print("Keycloak: No or invalid response text. This is not an error.")
                try:
                    print("Keycloak: Response JSON: ", response.json())
                except:
                    print("Keycloak: No or invalid response JSON. This it not an error.")
                status = response.status_code
                if status == 204:
                    print(" SSO user " + user + " has been added to group, if it wasn't already.")
                    #irc.reply("SSO user " + user + " is now authorized to authenticate IRC user " + user) - we currently cannot actually tell
                    irc.reply("Success.")
                if status != 204:
                    print("ERROR: HTTP request did not succeed. I tried these values:")
                    print("URL: " + url)
                    print("Group: " + gid)
                    print("User: " + uid)
                    irc.error(usererr)
            except:
                print('Operation failed.')
        # if choice == 'query':
        #     try:
        #         url = server + '/auth/admin/realms/' + realm + '/users/' + uid + '/groups'
        #         response = requests.get(
        #         url,
        #         headers = {'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token})
        #         test = "{}"
        #         print(url)
        #         userdata = response.json()
        #         print(userdata)
        #         print(response)
        #         userjson = json.loads(userdata)
        #         print(userjson)
        #         if userdetails != '[]' or '{}':
        #             if gid in userjson:
        #                 irc.reply("Your IRC user is enabled for SSO authentication.")
        #                 print(userdetails)
        #         else:
        #             irc.reply("Your IRC user is not enabled for SSO authentication.")
        #     except:
        #         print('Operation failed.')
        else:
            irc.error('Invalid argument.')

    ircprom = wrap(ircprom, ['anything'])

    def user(self, irc, msg, args, option):
        """<option>
        groups = dumps the groups you are joined to."""

        user = msg.nick
        server = self.registryValue('backend.server')
        realm = self.registryValue('backend.realm')
        tokenurl = self.registryValue('backend.token')
        usererr = self.registryValue('replies.error')
        try:
            tokendl = requests.get(tokenurl)
            tokendata = tokendl.json()
            token = tokendata['access_token']
            url = server + '/auth/admin/realms/' + realm + '/users'
            userdata = requests.get(url, params = {'username': user}, headers = {'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token})
            userresp = userdata.json()
            uid = userresp[0]['id']
            print(user, uid)
        except:
            print("ERROR: Keycloak token could not be installed.")
            irc.error(usererr)
        if option == 'groups':
            try:
                url = server + '/auth/admin/realms/' + realm + '/users/' + uid + '/groups'
                response = requests.get(
                url,
                headers = {'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token})
                test = "{}"
                print(url)
                usergroups = response.json()
                if usergroups:
                    groups = []
                    for group in usergroups:
                        groupname = group['name']
                        groups.append(groupname)
                    irc.replies(groups, prefixer='Group(s): ', joiner=', ', onlyPrefixFirst=True)
                else:
                    irc.reply("No groups.")
            except:
                print('Operation failed.')
                irc.reply(usererr)

    user = wrap(user, ['anything'])

    def admin(self, irc, msg, args, name, option1, option2, option3):
        """<name> <option> [option]
        Administration Interface"""

        user = name
        server = self.registryValue('backend.server')
        realm = self.registryValue('backend.realm')
        tokenurl = self.registryValue('backend.token')
        usererr = self.registryValue('replies.error')
        tokendl = requests.get(tokenurl)
        tokendata = tokendl.json()
        token = tokendata['access_token']
        url = server + '/auth/admin/realms/' + realm + '/users'
        userdata = requests.get(url, params = {'username': user}, headers = {'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token})
        userresp = userdata.json()
        uid = userresp[0]['id']
        print(user, uid)
        if option1 == 'groups' or option1 == 'group':
            if not option2:
                try:
                    url = server + '/auth/admin/realms/' + realm + '/users/' + uid + '/groups'
                    response = requests.get(
                    url,
                    headers = {'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token})
                    test = "{}"
                    print(url)
                    usergroups = response.json()
                    if usergroups:
                        groups = []
                        for group in usergroups:
                            groupname = group['name']
                            groups.append(groupname)
                        irc.replies(groups, prefixer='Group(s): ', joiner=', ', onlyPrefixFirst=True)
                    else:
                        irc.reply("No groups.")
                except:
                    print('Operation failed.')
                    irc.reply(usererr)
            if option2 == 'join':
                if not option3:
                    irc.reply('The following group shortcuts are currently joinable: confluence')
                elif option3 == 'confluence':
                    try:
                        gid = self.registryValue('options.confluencegroup')
                        url = server + '/auth/admin/realms/' + realm + '/users/' + uid + '/groups/' + gid
                        response = requests.put(
                        url,
                        headers = {'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token})
                        status = response.status_code
                        print("Keycloak: HTTP Status ", status)
                        if status == 204:
                            print(" SSO user " + user + " has been added to group, if it wasn't already.")
                            irc.reply("Success.")
                        if status != 204:
                            print("ERROR: HTTP request did not succeed. I tried these values:")
                            print("URL: " + url)
                            print("Group: " + gid)
                            print("User: " + uid)
                            irc.error(usererr)
                    except:
                        print('Operation failed.')
                else:
                    irc.error('Unknown group.')
            if option2 == 'unjoin':
                if not option3:
                    irc.reply('The following group shortcuts are currently joinable: confluence')
                elif option3 == 'confluence':
                    try:
                        gid = self.registryValue('options.confluencegroup')
                        url = server + '/auth/admin/realms/' + realm + '/users/' + uid + '/groups/' + gid
                        response = requests.delete(
                        url,
                        headers = {'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token})
                        status = response.status_code
                        print("Keycloak: HTTP Status ", status)
                        if status == 204:
                            print(" SSO user " + user + " has been added to group, if it wasn't already.")
                            irc.reply("Success.")
                        if status != 204:
                            print("ERROR: HTTP request did not succeed. I tried these values:")
                            print("URL: " + url)
                            print("Group: " + gid)
                            print("User: " + uid)
                            irc.error(usererr)
                    except:
                        print('Operation failed.')
        else:
            irc.error('Invalid operation.')

    admin = wrap(admin, ['anything', 'anything', optional('anything'), optional('anything')])

Class = Keycloak


# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79: