import getpass
import os
import sys
import psycopg2
from mastodon import Mastodon
from mastodon.Mastodon import MastodonMalformedEventError, MastodonNetworkError, MastodonReadTimeout, MastodonAPIError, MastodonIllegalArgumentError
import uuid
import pdb

def get_config():

    # Load configuration from config file
    config_filepath = "config/db_config.txt"
    replicator_db = get_db_params("replicator_db", config_filepath)
    replicator_db_user = get_db_params("replicator_db_user", config_filepath)

    return (config_filepath, replicator_db, replicator_db_user)

def check_db_conn():

    try:

        conn = None

        conn = psycopg2.connect(database = replicator_db, user = replicator_db_user, password = "", host = "/var/run/postgresql", port = "5432")

    except (Exception, psycopg2.DatabaseError) as error:

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

        sys.exit("Exiting. Run 'python db-setup' again")

class Bot:

    name = "Bot"

    def __init__(self, hostname, software, username, password, app_name, twitter_username):

        self.hostname = hostname
        self.software = software
        self.username = username
        self.password = password
        self.app_name = app_name
        self.twitter_username = twitter_username

    def log_in(self):

        token = ''

        try:

            response = Mastodon.create_app(
                self.app_name,
                scopes=["read","write"],
                to_file=None,
                api_base_url=self.hostname
                )
            client_id = response[0]
            client_secret = response[1]

            mastodon = Mastodon(client_id = client_id, client_secret = client_secret, api_base_url = self.hostname)
        
            token = mastodon.log_in(
                self.username,
                self.password,
                scopes = ["read", "write"],
                to_file = None
            )

            print('Log in succesful!')

        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')

        finally:

            return (client_id, client_secret, token)

    def check_account(self):

        is_duplicate = False

        sql = 'select username from maccounts where username=(%s)'

        conn = None

        try:

            conn = psycopg2.connect(database = replicator_db, user = replicator_db_user, password = "", host = "/var/run/postgresql", port = "5432")

            cur = conn.cursor()

            cur.execute(sql, (self.username,))

            row = cur.fetchone()

            if row != None:

                is_duplicate = True

        except (Exception, psycopg2.DatabaseError) as error:

            check_error = error.pgcode

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

        finally:

            if conn is not None:

                conn.close()

            return is_duplicate

    def save_account(self, client_id, client_secret, token):

        bot_uuid = str(uuid.uuid4())

        save_error = None

        mastodon_sql = f'INSERT INTO maccounts (bot_id, hostname, username, client_id, client_secret, client_token, hostname_soft) VALUES (%s,%s,%s,%s,%s,%s,%s)'

        twitter_sql = f'INSERT INTO taccounts (bot_id, username) VALUES (%s,%s)'

        conn = None

        try:

            conn = psycopg2.connect(database = replicator_db, user = replicator_db_user, password = "", host = "/var/run/postgresql", port = "5432")

            cur = conn.cursor()

            cur.execute(mastodon_sql, (bot_uuid, self.hostname, self.username, client_id, client_secret, token, self.software))

            cur.execute(twitter_sql, (bot_uuid, self.twitter_username))

            conn.commit()

        except (Exception, psycopg2.DatabaseError) as error:

            save_error = error.pgcode

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

        finally:

            if conn is not None:

                conn.close()

        return save_error

def get_db_params( parameter, file_path ):

    if not os.path.isfile(file_path):
        print("File %s not found, exiting."%file_path)
        sys.exit(0)

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

    # Cannot find parameter, exit
    print(file_path + "  Missing parameter %s "%parameter)
    sys.exit(0)

   
###############################################################################
# main

if __name__ == '__main__':

    config_filepath, replicator_db, replicator_db_user = get_config()

    check_db_conn()

    bot_hostname = input("Enter Mastodon/Pleroma hostname: ")
    bot_software = input("Server software (mastodon or pleroma)? ")
    bot_username = input(f'User name, ex. user@{bot_hostname}? ')
    bot_password = getpass.getpass("User password? ")
    bot_app_name = 'replicator'
    bot_twitter_username = input(f'Twitter username (ex. jack)? ')
    
    myBot = Bot(bot_hostname, bot_software, bot_username, bot_password, bot_app_name, bot_twitter_username)

    is_duplicate = myBot.check_account()

    if is_duplicate:

        print(f'Bot account already exist!')

        sys.exit()

    else:

        client_id, client_secret, token = myBot.log_in()

        if len(token) > 0:

            save_error = myBot.save_account(client_id, client_secret, token)

            if save_error == None:

                print(f'Done.')

            else:

                if save_error == '423505':

                    sys.exit()