import datetime
from mastodon import Mastodon
import time
import os
import json
import sys
import os.path
import operator
import psycopg2
from langdetect import detect
import requests
import pdb

def check_ip(ip):

    is_tor_exit_node = 'f'

    conn = None

    try:

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

        cur = conn.cursor()

        cur.execute('select ip from torexit_ips where ip=(%s)', (ip,))

        row = cur.fetchone()

        if row != None:

            is_tor_exit_node = 't'

        cur.close()

    except (Exception, psycopg2.DatabaseError) as error:

        print(error)

    finally:

        if conn is not None:

            conn.close()

    return is_tor_exit_node

def check_approval(user_id):

    approved = False

    try:

        conn = None

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

        cur = conn.cursor()

        cur.execute("select approved from users where id = (%s)", (user_id,))

        row = cur.fetchone()

        if row != None:

            approved = row[0]

        cur.close()

        return approved

    except (Exception, psycopg2.DatabaseError) as error:

        print (error)

    finally:

        if conn is not None:

            conn.close()

def mastodon():

    # Load secrets from secrets file
    secrets_filepath = "secrets/secrets.txt"
    uc_client_id = get_parameter("uc_client_id",     secrets_filepath)
    uc_client_secret = get_parameter("uc_client_secret", secrets_filepath)
    uc_access_token = get_parameter("uc_access_token",  secrets_filepath)

    # Load configuration from config file
    config_filepath = "config/config.txt"
    mastodon_hostname = get_parameter("mastodon_hostname", config_filepath)

    # Initialise Mastodon API
    mastodon = Mastodon(
        client_id=uc_client_id,
        client_secret=uc_client_secret,
        access_token=uc_access_token,
        api_base_url='https://' + mastodon_hostname,
    )

    # Initialise access headers
    headers = {'Authorization': 'Bearer %s'%uc_access_token}

    return (mastodon, mastodon_hostname)

def db_config():

    # Load db configuration from config file
    config_filepath = "config/db_config.txt"
    mastodon_db = get_parameter("mastodon_db", config_filepath)
    mastodon_db_user = get_parameter("mastodon_db_user", config_filepath)
    spamcheck_db = get_parameter("spamcheck_db", config_filepath)
    spamcheck_db_user = get_parameter("spamcheck_db_user", config_filepath)

    return (mastodon_db, mastodon_db_user, spamcheck_db, spamcheck_db_user)

# Returns the parameter from the specified file
def get_parameter( parameter, file_path ):
    # Check if secrets file exists
    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__':

    mastodon_db, mastodon_db_user, spamcheck_db, spamcheck_db_user = db_config()

    mastodon, mastodon_hostname = mastodon()

    ###############################################################################
    # check new registering
    ###############################################################################
    
    created_at_lst = []

    id_lst = []

    email_lst = []

    ip_lst = []

    text_lst = []
    
    try:

        conn = None

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

        cur = conn.cursor()

        cur.execute("select users.created_at, users.id, users.email, users.sign_up_ip, user_invite_requests.text from users, user_invite_requests where not users.approved and users.id = user_invite_requests.user_id")

        rows = cur.fetchall()

        for row in rows:

            if row != None:

                created_at_lst.append(row[0])

                id_lst.append(row[1])

                email_lst.append(row[2])

                ip_lst.append(row[3])

                text_lst.append(row[4])

        cur.close()

    except (Exception, psycopg2.DatabaseError) as error:

        print (error)

    finally:

        if conn is not None:

            conn.close()

    ###############################################################################

    insert_sql = 'INSERT INTO spamcheck(created_at, id, email, ip, text: tor_exit_node) VALUES(%s,%s,%s,%s,%s,%s) ON CONFLICT DO NOTHING'
    
    i = 0

    while i < len(id_lst):

        if detect(text_lst[i]) != 'ca':

            is_tor_exit_node = check_ip(ip_lst[i])

            tor_exit_node = 't' if is_tor_exit_node else 'f'

            conn = None

            try:

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

                cur = conn.cursor()

                cur.execute(insert_sql, (created_at_lst[i], id_lst[i], email_lst[i], ip_lst[i], text_lst[i]), tor_exit_node)

                conn.commit()

                cur.close()

            except (Exception, psycopg2.DatabaseError) as error:

                print(error)

            finally:

                if conn is not None:

                    conn.close()

            print(created_at_lst[i], id_lst[i], email_lst[i], ip_lst[i], text_lst[i])

        i = i + 1

        ##########################################################################

        approved_users_id_lst = []

        conn = None

        try:

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

            cur = conn.cursor()

            cur.execute('select id from spamcheck')

            rows = cur.fetchall()

            for row in rows:

                approved_users_id_lst.append(row)

            cur.close()

        except (Exception, psycopg2.DatabaseError) as error:

            print(error)

        finally:

            if conn is not None:

                conn.close()

        for user_id in approved_users_id_lst:

            approved = check_approval(user_id)

            if approved:

                conn = None

                try:

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

                    cur = conn.cursor()

                    cur.execute('delete from spamcheck where id=(%s)', (user_id,))

                    conn.commit()

                    cur.close()

                except (Exception, psycopg2.DatabaseError) as error:

                    print(error)

                finally:

                    if conn is not None:

                        conn.close()