import requests
import os
import sys
from time import gmtime, strftime
import crython
#SSL Cert Verification
# Requests verifies SSL certificates for HTTPS requests, just like a web browser.
# By default, SSL verification is enabled, and Requests will throw a SSLError
# if it’s unable to verify the certificate.

def print_zone(x):
    return f"{{name: {x['name']} , id: {x['id']}}}"

def print_dns_record(x):
    return f"{{name: {x['name']} , id: {x['id']} , type: {x['type']}}}"


def get_zones(auth_token):
    def zone_to_id_name(x):
        return {
            'id': x['id'],
            'name': x['name']
        }
    api_url = "https://api.cloudflare.com/client/v4/zones"
    response = requests.get(api_url, headers={
        'Content-Type': 'application/json',
        'Authorization': f'Bearer {auth_token}'
    })
    response_json = response.json()
    if response_json['success'] == False:
        raise ""
    zones = list(map(zone_to_id_name, response_json['result']))
    print('Zones: ')
    print('\n'.join(map(print_zone, zones)))
    active_zones = list(map(zone_to_id_name,filter(lambda x: x['status'] == 'active',response_json['result'])))
    print('Active zones: ')
    print('\n'.join(map(print_zone, active_zones)))
    return (zones, active_zones)

def get_dns_records(auth_token, active_zones):
    def dns_record_to_id_name_type(x):
        return {
            'id': x['id'],
            'name': x['name'],
            'zone_id': x['zone_id'],
            'zone_name': x['zone_name'],
            'type': x['type']
        }
    dns_a_records: list = []
    dns_records: list = []
    for active_zone in active_zones:
        api_url = f"https://api.cloudflare.com/client/v4/zones/{active_zone['id']}/dns_records"
        response = requests.get(api_url, headers={
            'Content-Type': 'application/json',
            'Authorization': f'Bearer {auth_token}'
        })
        response_json = response.json()
        if response_json['success'] == False:
            raise ""
        dns_records.extend(list(map(dns_record_to_id_name_type, response_json['result'])))
        print('Dns records: ')
        print('\n'.join(map(print_dns_record, dns_records)))
        dns_a_records.extend(list(map(dns_record_to_id_name_type,filter(lambda x: x['type'] == 'A',response_json['result']))))
        print('Dns records A: ')
        print('\n'.join(map(print_dns_record, dns_a_records)))
    return (dns_records, dns_a_records)

# Crython supports seven fields 
# (seconds, minutes, hours, day of month, month, weekday, year).
# https://crontab.guru/#*/5_*_*_*_*
old_ip: str = '0.0.0.0'

@crython.job(expr='0 */5 * * * * *')
def main():
    TOKEN = os.environ.get('CLOUDFLARE_TOKEN')
    DNS = os.environ.get('ZONES')
    DNS_A = os.environ.get('DNS_A_RECORDS')
    DNS = DNS.split(',')
    DNS_A.split(',')



    current_time = strftime("%d %b, %Y %H:%M:%S", gmtime())
    print(f"{current_time}: EXECUTION STARTED")
    my_public_ip = requests.get('https://ifconfig.me').text

    if old_ip == my_public_ip:
        print("NOTHING TO UPDATE")
        sys.exit(0)
    print(f'PUBLIC IP: {my_public_ip}')

    print("Zones:")
    (zones, active_zones) = get_zones(TOKEN)
    active_zones = list(filter(lambda x: x['name'] in DNS, active_zones))

    print("Active zones to update:")
    print('\n'.join(map(print_zone,active_zones)))

    (dns_records, dns_a_records) = get_dns_records(TOKEN, active_zones)

    print(dns_a_records)
    for dns_a_record in dns_a_records:
        # TOOD

        api_url = f"https://api.cloudflare.com/client/v4/zones/{dns_a_record['zone_id']}/dns_records/{dns_a_record['id']}"
        response = requests.patch(api_url, headers={
            'Content-Type': 'application/json',
            'Authorization': f'Bearer {TOKEN}'
        }, data= {
            'content': my_public_ip,
            'type': 'A'
        })
        response_json = response.json()
        if response_json['success'] == False:
            raise ""
        print(f"Successfuly chcanged IP address of {dns_a_record['name']}")
        print(response_json)

    current_time = strftime("%d %b, %Y %H:%M:%S", gmtime())
    
    old_ip = my_public_ip
    print(f"{current_time} FINISHED EXECUTION SUCCESSFULLY")


    # api_url = f"https://api.cloudflare.com/client/v4/zones/{dns_a_record['zone_id']}/dns_records/{dns_a_record['id']}"
    # response = requests.patch(api_url, headers={
    #     'Content-Type': 'application/json',
    #     'Authorization': f'Bearer {TOKEN}'
    # }, data= {
    #     'content': my_public_ip,
    #     'type': 'A'
    # })
    # response_json = response.json()
    # if response_json['success'] == False:
    #     raise ""
    # print(f"Successfuly chcanged IP address of {dns_a_record['name']}")
    
    # api_url = f"https://api.cloudflare.com/client/v4/zones/{dns_a_record['zone_id']}/dns_records/{dns_a_record['id']}"
    # response = requests.get(api_url, headers={
    #     'Content-Type': 'application/json',
    #     'Authorization': f'Bearer {TOKEN}'
    # })
    # response_json = response.json()