from mastodon import Mastodon
from mastodon.Mastodon import MastodonMalformedEventError, MastodonNetworkError, MastodonReadTimeout, MastodonAPIError, MastodonIllegalArgumentError
import getpass
import unidecode
import fileinput,re
import os
import sys
import os.path
import pdb

###
# Dict helper class.
# Defined at top level so it can be pickled.
###
class AttribAccessDict(dict):
    def __getattr__(self, attr):
        if attr in self:
            return self[attr]
        else:
            raise AttributeError("Attribute not found: " + str(attr))

    def __setattr__(self, attr, val):
        if attr in self:
            raise AttributeError("Attribute-style access is read only")
        super(AttribAccessDict, self).__setattr__(attr, val)

class Mastodonbot:

    name = 'Mastodonbot'

    def __init__(self, mastodon=None, mastodon_hostname=None):

        file_path = "secrets/secrets.txt"

        is_setup = self.__check_setup(file_path)

        if is_setup:

            self.__uc_client_id     = self.__get_parameter("uc_client_id",     file_path)
            self.__uc_client_secret = self.__get_parameter("uc_client_secret", file_path)
            self.__uc_access_token  = self.__get_parameter("uc_access_token",  file_path)

            self.mastodon, self.mastodon_hostname = self.__log_in(self)

            bot_file_path = "config/config.txt"

        else:

            while(True):

                logged_in, self.mastodon, self.mastodon_hostname = self.setup()

                if not logged_in:

                    print("\nLog in failed! Try again.\n")

                else:

                    bot_file_path = "config/config.txt"

                    break

    @staticmethod
    def __log_in(self):

        file_path = "secrets/secrets.txt"
        uc_client_id     = self.__get_parameter("uc_client_id",     file_path)
        uc_client_secret = self.__get_parameter("uc_client_secret", file_path)
        uc_access_token  = self.__get_parameter("uc_access_token",  file_path)

        file_path = "config/config.txt"
        self.mastodon_hostname = self.__get_parameter("mastodon_hostname", file_path)

        self.mastodon = Mastodon(
            client_id = uc_client_id,
            client_secret = uc_client_secret,
            access_token = uc_access_token,
            api_base_url = 'https://' + self.mastodon_hostname,
        )

        headers={ 'Authorization': 'Bearer %s'%uc_access_token }

        return (self.mastodon, self.mastodon_hostname)

    @staticmethod
    def __check_setup(file_path):

        is_setup = False

        if not os.path.isfile(file_path):
            print(f"File {file_path} not found, running setup.")
            return
        else:
            is_setup = True
            return is_setup

    def setup(self):

        logged_in = False

        try:

            self.mastodon_hostname = input("Enter Mastodon hostname (or 'q' to exit): ")

            if self.mastodon_hostname == 'q':

                sys.exit("Bye")

            user_name = input("Bot user name, ex. john? ")
            user_password = getpass.getpass("Bot password? ")
            app_name = input("Bot App name? ")

            client_id, client_secret = Mastodon.create_app(
                    app_name,
                    to_file="app_clientcred.txt",
                    api_base_url=self.mastodon_hostname
                    )

            mastodon = Mastodon(client_id = "app_clientcred.txt", api_base_url = self.mastodon_hostname)

            mastodon.log_in(
                user_name,
                user_password,
                scopes = ["read", "write"],
                to_file = "app_usercred.txt"
            )

            if os.path.isfile("app_usercred.txt"):

                print(f"Log in succesful!")
                logged_in = True

            if not os.path.exists('secrets'):
                os.makedirs('secrets')

            secrets_filepath = 'secrets/secrets.txt'

            if not os.path.exists(secrets_filepath):
                with open(secrets_filepath, 'w'): pass
                print(f"{secrets_filepath} created!")

            with open(secrets_filepath, 'a') as the_file:
                print("Writing secrets parameter names to " + secrets_filepath)
                the_file.write('uc_client_id: \n'+'uc_client_secret: \n'+'uc_access_token: \n')

            client_path = 'app_clientcred.txt'

            with open(client_path) as fp:

                line = fp.readline()
                cnt = 1

                while line:

                    if cnt == 1:

                        print("Writing client id to " + secrets_filepath)
                        self.__modify_file(self, secrets_filepath, "uc_client_id: ", value=line.rstrip())

                    elif cnt == 2:

                        print("Writing client secret to " + secrets_filepath)
                        self.__modify_file(self, secrets_filepath, "uc_client_secret: ", value=line.rstrip())

                    line = fp.readline()
                    cnt += 1

            token_path = 'app_usercred.txt'

            with open(token_path) as fp:

                line = fp.readline()
                print("Writing access token to " + secrets_filepath)
                self.__modify_file(self, secrets_filepath, "uc_access_token: ", value=line.rstrip())

            if os.path.exists("app_clientcred.txt"):

                print("Removing app_clientcred.txt temp file..")
                os.remove("app_clientcred.txt")

            if os.path.exists("app_usercred.txt"):

                print("Removing app_usercred.txt temp file..")
                os.remove("app_usercred.txt")

            self.config_filepath = 'config/config.txt'

            self.__create_config(self)
            self.__write_config(self)

            print("Secrets setup done!\n")

        except MastodonIllegalArgumentError as i_error:

            sys.stdout.write(f'\n{str(i_error)}\n')

        except MastodonNetworkError as n_error:

            sys.stdout.write(f'\n{str(n_error)}\n')

        except MastodonReadTimeout as r_error:

            sys.stdout.write(f'\n{str(r_error)}\n')

        except MastodonAPIError as a_error:

            sys.stdout.write(f'\n{str(a_error)}\n')

        return (logged_in, mastodon, self.mastodon_hostname)

    @staticmethod
    def __get_parameter(parameter, file_path ):

        with open( file_path ) as f:
            for line in f:
                if line.startswith( parameter ):
                    return line.replace(parameter + ":", "").strip()

        print(f'{file_path} Missing parameter {parameter}')
        sys.exit(0)

    @staticmethod
    def __modify_file(self, file_name, pattern,value=""):

        fh=fileinput.input(file_name,inplace=True)

        for line in fh:

            replacement=pattern + value
            line=re.sub(pattern,replacement,line)
            sys.stdout.write(line)

        fh.close()

    @staticmethod
    def __create_config(self):

        if not os.path.exists('config'):

            os.makedirs('config')

        if not os.path.exists(self.config_filepath):

            print(self.config_filepath + " created!")
            with open('config/config.txt', 'w'): pass

    @staticmethod
    def __write_config(self):

        with open(self.config_filepath, 'a') as the_file:

            the_file.write(f'mastodon_hostname: {self.mastodon_hostname}\n')
            print(f"adding parameter 'mastodon_hostname' to {self.config_filepath}\n")

    def get_data(self, notif):

        id = notif.id

        account_id = notif.account.id

        acct = notif.account.acct

        status_id = notif.status.id

        text  = notif.status.content

        visibility = notif.status.visibility

        reply, question = self.__get_question(self, text)

        mention_dict = {'reply': reply, 'question': question, 'id': id, 'account_id': account_id, 'acct': acct, 'status_id': status_id, 'text': text, 'visibility': visibility}

        mention = self.__json_allow_dict_attrs(mention_dict)

        return mention

    @staticmethod
    def __get_question(self, text):

        reply = False

        keyword = ''

        content = self.__cleanhtml(self, text)

        content = self.__unescape(self, content)

        try:

            start = content.index("@")
            end = content.index(" ")
            if len(content) > end:

                content = content[0: start:] + content[end +1::]

            cleanit = content.count('@')

            i = 0
            while i < cleanit :

                start = content.rfind("@")
                end = len(content)
                content = content[0: start:] + content[end +1::]
                i += 1

            content = content.lower()
            question = content

            keyword = question

            if keyword == 'alta' or keyword == 'baixa' or keyword == 'esborra' or keyword == 'confirmo':

                keyword_length = len(keyword)

            if unidecode.unidecode(question)[0:keyword_length] == keyword:

                reply = True

        except:

            pass

        return (reply, question)

    @staticmethod
    def __cleanhtml(self, raw_html):

        cleanr = re.compile('<.*?>')
        cleantext = re.sub(cleanr, '', raw_html)
        return cleantext

    @staticmethod
    def __unescape(self, s):

        s = s.replace("&apos;", "'")
        return s

    @staticmethod
    def __json_allow_dict_attrs(json_object):
        """
        Makes it possible to use attribute notation to access a dicts
        elements, while still allowing the dict to act as a dict.
        """
        if isinstance(json_object, dict):
            return AttribAccessDict(json_object)
        return json_object