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

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)
    welcome_db = get_parameter("welcome_db", config_filepath)
    welcome_db_user = get_parameter("welcome_db_user", config_filepath)

    return (mastodon_db, mastodon_db_user, welcome_db, welcome_db_user)

def get_locale( parameter, welcome_lang):

    if welcome_lang not in ['ca','es','en']:
        print("lang must be 'ca', 'es' or 'en'")
        sys.exit(0)

    language_filepath = f"app/locales/{welcome_lang}.txt"

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

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

    print(language_filepath + "  Missing parameter %s "%parameter)
    sys.exit(0)

def usage():

    print('usage: python ' + sys.argv[0] + ' --ca (or --es or --en)')

# 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__':

    # usage modes

    if len(sys.argv) == 1:

        usage()

    elif len(sys.argv) >= 2:

        welcome_lang = ''

        if sys.argv[1] == '--ca':

            welcome_lang = 'ca'

        if sys.argv[1] == '--es':

            welcome_lang = 'es'

        elif sys.argv[1] == '--en':

            welcome_lang = 'en'

        if not welcome_lang in ['ca', 'es', 'en']:

            print("\nOnly 'ca', 'es' and 'en' languages are supported.\n")

            sys.exit(0)
        
        mastodon, mastodon_hostname = mastodon()

        mastodon_db, mastodon_db_user, welcome_db, welcome_db_user = db_config()

        ###############################################################################
        # current registered users
        ###############################################################################

        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 count(*) FROM users WHERE disabled='f' and approved='t'")

            row = cur.fetchone()

            if row != None:

                current_id = row[0]

            else:

                current_id = 0

            cur.close()

        except (Exception, psycopg2.DatabaseError) as error:

            print (error)

        finally:

            if conn is not None:

                conn.close()

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

        now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")

        users_before = current_id
        users_hour = 0

        conn = None

        try:

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

          cur = conn.cursor()

          cur.execute("SELECT DISTINCT ON (datetime) users FROM welcome WHERE datetime > current_timestamp - INTERVAL '70 minutes' ORDER BY datetime asc LIMIT 1")

          row = cur.fetchone()

          users_before = row[0]

          cur.close()

          users_hour = current_id - users_before

        except (Exception, psycopg2.DatabaseError) as error:

            print (error)

        finally:

            if conn is not None:

                conn.close()

        current_users_str = get_locale("current_users_str", welcome_lang)
        users_before_str = get_locale("users_before_str", welcome_lang)
        users_hour_str = get_locale("users_hour_str", welcome_lang)
        
        print("-----------------")
        print(current_users_str + ': ' + str(current_id))
        print(users_before_str + ': ' + str(users_before))
        print(users_hour_str + ': ' + str(users_hour))

        insert_sql = """INSERT INTO welcome(datetime, users, users_hour)
                     VALUES(%s,%s,%s) RETURNING datetime;"""
        conn = None

        now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")

        try:

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

            cur = conn.cursor()

            cur.execute(insert_sql, (now, current_id, users_hour))

            datetime = cur.fetchone()[0]

            conn.commit()

            cur.close()

        except (Exception, psycopg2.DatabaseError) as error:

            print(error)

        finally:

            if conn is not None:

                conn.close()

        ###############################################################################
        # WORK OUT THE TOOT TEXT
        ###############################################################################

        # Calculate difference in times

        hourly_change_string = ""
        daily_change_string  = ""
        weekly_change_string = ""
        users_hourly_change_string = ""

        try:

            conn = None

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

            cur = conn.cursor()

            cur.execute("SELECT DISTINCT ON (datetime) users, datetime FROM welcome WHERE datetime > current_timestamp - INTERVAL '62 minutes' ORDER BY datetime asc LIMIT 1")

            row = cur.fetchone()

            if row[0] == None:

                users_last_hour = 0

            else:

                users_last_hour = row[0]

            cur.execute("SELECT DISTINCT ON (datetime) users,datetime FROM welcome WHERE datetime > current_timestamp - INTERVAL '1 day' ORDER BY datetime asc LIMIT 1")

            row = cur.fetchone()

            if row[0] == None:

                users_last_day = 0

            else:

                users_last_day = row[0]

            cur.execute("SELECT DISTINCT ON (datetime) users,datetime FROM welcome WHERE datetime > current_timestamp - INTERVAL '7 days' ORDER BY datetime asc LIMIT 1")

            row = cur.fetchone()

            if row[0] == None:

                users_last_week = 0
            else:

                users_last_week = row[0]

            cur.close()

        except (Exception, psycopg2.DatabaseError) as error:

            print (error)

        finally:

            if conn is not None:

                conn.close()

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

        welcome_users = []

        if time.localtime().tm_isdst == 0:

            interval_time = '60 minutes'

        elif time.localtime().tm_isdst == 1:

            interval_time = '120 minutes'

        conn = None

        try:

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

            cur = conn.cursor()

            cur.execute("select username, domain from accounts where (created_at + interval '" + interval_time + "' > (now() - interval '1 hour')) and domain is null and suspended_at is null and id in (select account_id from users where approved and not disabled)")

            rows = cur.fetchall()

            for row in rows:

                if row[1] == None:

                    welcome_users.append(row[0])

            cur.close()

        except (Exception, psycopg2.DatabaseError) as error:

            print(error)

        finally:

            if conn is not None:

                conn.close()

        i = 0

        new_users_string = ""

        while i < len(welcome_users):

            new_users_string = new_users_string+"@"+welcome_users[i]

            i += 1

            if i < len(welcome_users):

                new_users_string = new_users_string+", "

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

        hour_inc = current_id - users_last_hour
        day_inc = current_id - users_last_day
        week_inc = current_id - users_last_week

        new_users_last_hour_str = get_locale("new_users_last_hour_str", welcome_lang)
        new_users_last_day_str = get_locale("new_users_last_day_str", welcome_lang)
        new_users_last_week_str = get_locale("new_users_last_week_str", welcome_lang)
        
        print("------------------------")
        print(new_users_last_hour_str + ': ' + str(hour_inc))
        print(new_users_last_day_str + ': ' + str(day_inc))
        print(new_users_last_week_str + ': ' + str(week_inc))

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

        # Hourly change
        if hour_inc != 0:

          users_hourly_change = current_id - users_last_hour
          
          hourly_users_evolution_str = get_locale("hourly_users_evolution_str", welcome_lang)
          in_the_last_hour_str = get_locale("in_the_last_hour_str", welcome_lang)
          print(hourly_users_evolution_str + ': %s'%users_hourly_change)
          
          if users_hourly_change > 0:
            hourly_change_string = "+" + format(users_hourly_change, ",d") + in_the_last_hour_str + "\n"

            # Daily change
            if day_inc != 0:

              daily_change = current_id - users_last_day

              daily_users_evolution_str = get_locale("daily_users_evolution_str", welcome_lang)
              in_the_last_day_str = get_locale("in_the_last_day_str", welcome_lang)
              print(daily_users_evolution_str + ': %s'%daily_change)
              
              if daily_change > 0:
                daily_change_string = "+" + format(daily_change, ",d") + in_the_last_day_str + "\n"

            # Weekly change
            if week_inc != 0:

              weekly_change = current_id - users_last_week
              
              weekly_users_evolution_str = get_locale("weekly_users_evolution_str", welcome_lang)
              in_the_last_week_str = get_locale("in_the_last_week_str", welcome_lang)
              print(weekly_users_evolution_str + ': %s'%weekly_change)

              if weekly_change > 0:
                weekly_change_string = "+" + format(weekly_change, ",d") + in_the_last_week_str + "\n"

          elif users_hourly_change < 0:

            hourly_change_string = format(users_hourly_change, ",d") + in_the_last_hour_str + "\n"

            # Daily change
            if day_inc != 0:
              daily_change = current_id - users_last_day
              
              daily_evolution_str = get_locale("daily_evolution_str", welcome_lang)
              print(daily_evolution_str + ': %s'%daily_change)
              
              if daily_change < 0:
                daily_change_string = format(daily_change, ",d") + in_the_last_day_str + "\n"

            # Weekly change
            if week_inc != 0:

              weekly_change = current_id - users_last_week
              
              weekly_evolution_str = get_locale("weekly_evolution_str", welcome_lang)
              print(weekly_evolution_str + ': %s'%weekly_change)
              
              if weekly_change < 0:
                weekly_change_string = format(weekly_change, ",d") + in_the_last_week_str + "\n"

        ###############################################################################
        # TOOT IT!
        ###############################################################################

        if len(welcome_users) > 0:

            welcomes_str = get_locale("welcomes_str", welcome_lang)
            we_have_str = get_locale("we_have_str", welcome_lang)
            users_str = get_locale("users_str", welcome_lang)
            
            toot_text = "\n"
            toot_text += mastodon_hostname + ' ' + welcomes_str + ':\n\n'
            toot_text += new_users_string + "\n"
            toot_text += "\n"
            toot_text += "\n\n" + we_have_str + ' ' +  str(current_id) + ' ' + users_str + "\n\n"
            toot_text += hourly_change_string
            toot_text += daily_change_string
            toot_text += weekly_change_string
            toot_text += "\n"

            print("Tooting...")
            print(toot_text)
            if len(toot_text) < 500:
              mastodon.status_post(toot_text, in_reply_to_id=None, )
            else:
              toot_text1, toot_text2 = toot_text[:int(len(toot_text)/2)], toot_text[int(len(toot_text)/2):]
              toot_id = mastodon.status_post(toot_text1, in_reply_to_id=None,)
              mastodon.status_post(toot_text2, in_reply_to_id=toot_id,)
              print(toot_text1)
              print(toot_text2)

            print("Done!")