#!/bin/python3
import os
import sys
import logging
import requests
import json
import argparse
import datetime

logging.basicConfig(format='%(levelname)s\t- %(message)s')
logger = logging.getLogger()
logger.setLevel(logging.INFO)

state = {}

def validDate(date):
    try:
        datetime.datetime.strptime(input,"%d/%m/%Y")
    except ValueError as err:
        logger.error("Date is invalid. Input format: DD/MM/YYYY")
        sys.exit(-1)

#session file - [-s username] [-d nt/ot/et date]
def list_docs(args):
    parser = argparse.ArgumentParser()

    parser.add_argument('session', nargs='?', default=None)
    parser.add_argument("-s", '--username', nargs=1, help="Username")
    parser.add_argument("-dnt", '--newerThan', help="Date new than")
    parser.add_argument("-dot", '--olderThan', help="Date older than")
    parser.add_argument("-deq", '--equalTo',   help="Date equal to")

    args = parser.parse_args()

    # Check if session file is valid
    if args.session:
        if (not os.path.isfile(args.session)):
            logger.error("File '" + args.session + "' not found.")
            sys.exit(-1)
    else:
        logger.error("Need session file.")
        sys.exit(-1)

    if args.newerThan:
        validDate(args.newerThan)

        try: 
            subjects = requests.get(f'http://{state['REP_ADDRESS']}/user/list', 
                                               json=json.dumps({'username' : args.username, 'newerThan' : args.newerThan}))
            subjects.raise_for_status() 

        except requests.exceptions.RequestException as errex: 
            logger.error("Failed to obtain response from server.")
            sys.exit(1)

        subjects = json.loads(subjects)
        
    elif args.equalTo:
        validDate(args.equalTo)

        try: 
            subjects = requests.get(f'http://{state['REP_ADDRESS']}/user/list', 
                                               json=json.dumps({'username' : args.username, 'equalTo' : args.equalTo}))
            subjects.raise_for_status() 

        except requests.exceptions.RequestException as errex: 
            logger.error("Failed to obtain response from server.")
            sys.exit(1)

        subjects = json.loads(subjects)

    elif args.olderThan:
        validDate(args.olderThan)

        try: 
            subjects = requests.get(f'http://{state['REP_ADDRESS']}/user/list', 
                                               json=json.dumps({'username' : args.username, 'olderThan' : args.olderThan}))
            subjects.raise_for_status() 

        except requests.exceptions.RequestException as errex: 
            logger.error("Failed to obtain response from server.")
            sys.exit(1)

        subjects = json.loads(subjects)

    else:
        try: 
            subjects = requests.get(f'http://{state['REP_ADDRESS']}/user/list')
            subjects.raise_for_status() 

        except requests.exceptions.RequestException as errex: 
            logger.error("Failed to obtain response from server.")
            sys.exit(1)

        subjects = json.loads(subjects)

    for s in subjects:
        sys.stdout.write(s['id'] + " - " + s['username'])


if __name__ == '__main__':
    list_docs(sys.argv[1:])