from datetime import datetime, timezone, timedelta
import time
import threading
import os
import sys
import os.path
import psycopg2
import pytz
import dateutil
from dateutil.parser import parse
from decimal import *
getcontext().prec = 2

###############################################################################
# get bills rows
###############################################################################

def print_bills():

    try:

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

        cur = conn.cursor()

        cur.execute("SELECT datetime, domain, server, backup, fileserver, setup FROM bills")

        rows = cur.fetchall()

        for row in rows:

            date = row[0].date().strftime('%d.%m.%Y')
            print(date, ', domain: ' + str(row[1]), ', server: ' + str(row[2]), 'backup: ' + str(row[3]), ', fileserver: ' + str(row[4]), ' setup: ' + str(row[5]))

        cur.close()

    except (Exception, psycopg2.DatabaseError) as error:

        print(error)

    finally:

        if conn is not None:

            conn.close()

###################################################################################
# add bills to database
###################################################################################

def insert_bills(billdate, domainbill, serverbill, backupbill, fileserverbill, setupbill):

    sql  = "INSERT INTO bills(datetime, domain, server, backup, fileserver, setup) VALUES(%s,%s,%s,%s,%s,%s)"

    try:

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

        cur = conn.cursor()

        cur.execute(sql, (billdate, domainbill, serverbill, backupbill, fileserverbill, setupbill))
        print("\n")
        print("Updating bills...")

        conn.commit()

        cur.close()

    except (Exception, psycopg2.DatabaseError) as error:

        print(error)

    finally:

        if conn is not None:

            conn.close()

###############################################################################
# INITIALISATION
###############################################################################

# Returns the parameter from the specified file
def get_parameter( parameter, file_path ):
    # Check if db_config.txt file exists
    if not os.path.isfile(file_path):
        if file_path == "config/db_config.txt":
          print("File %s not found, exiting. Run db-setup.py."%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)
    print("Run setup.py")
    sys.exit(0)

# Load configuration from config file
config_filepath = "config/db_config.txt"
budget_db = get_parameter("budget_db", config_filepath) # E.g., budget
budget_db_user = get_parameter("budget_db_user", config_filepath) # E.g., mastodon

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

while True:

    domainbill = input("Domain bill? (q to quit) ")
    if domainbill == '':
        domainbill = '0.00'
    elif domainbill == 'q':
        sys.exit("Bye")
    domainbill = round(float(domainbill),2)

    serverbill = input("Server bill? ")
    if serverbill == '':
        serverbill = '0.00'
    serverbill = round(float(serverbill),2)

    backupbill = input("Backup bill? ")
    if backupbill == '':
        backupbill = '0.00'
    backupbill = round(float(backupbill),2)

    fileserverbill = input("Fileserver bill? ")
    if fileserverbill == '':
        fileserverbill = 0.00
    fileserverbill = round(float(fileserverbill),2)

    setupbill = input("Setup bill? ")
    if setupbill == '':
        setupbill = 0.00
    setupbill = round(float(setupbill),2)

    billdate = datetime.strptime(input('Enter Bill date in the format d.m.yyyy '), '%d.%m.%Y')

    now = datetime.now()

    billdate = billdate.replace(hour=now.hour, minute=now.minute, second=now.second)

    insert_bills(billdate, domainbill, serverbill, backupbill, fileserverbill, setupbill)
    print_bills()