#!/usr/bin/python3
import sys
import os
import base64
import json
import datetime
import pytz
import uuid

# Add parent directory to path for o11 import
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
import o11

from bs4 import BeautifulSoup
from pywidevine.cdm import Cdm
from pywidevine.device import Device
from pywidevine.pssh import PSSH

# Parse command line parameters
user = o11.parse_params(sys.argv, 'user')
password = o11.parse_params(sys.argv, 'password')
device = o11.parse_params(sys.argv, 'device')
pin = o11.parse_params(sys.argv, 'pin')

id = o11.parse_params(sys.argv, 'id')
action = o11.parse_params(sys.argv, 'action')

bind = o11.parse_params(sys.argv, 'bind')
proxy = o11.parse_params(sys.argv, 'proxy')
doh = o11.parse_params(sys.argv, 'doh')
worker = o11.parse_params(sys.argv, 'worker')

cdm = o11.parse_params(sys.argv, 'cdm')
drm = o11.parse_params(sys.argv, 'drm')
kid = o11.parse_params(sys.argv, 'kid')
pssh = o11.parse_params(sys.argv, 'pssh')
challenge = o11.parse_params(sys.argv, 'challenge')

heartbeaturl = o11.parse_params(sys.argv, 'heartbeaturl')
heartbeatparams = o11.parse_params(sys.argv, 'heartbeatparams')

# Session setup
o11Session = o11.session(bind=bind, proxy=proxy, worker=worker)
req = o11Session.get_session()
if doh != "":
    o11.dns(doh)

if challenge == "cert":
    challenge = "CAQ="

# Configuration
WVD_PATH = './WVD.wvd'
authFile = '/HRTi_auth.json'
SCRIPT_DIR = os.path.abspath(os.path.dirname(__file__))

USER_AGENT = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36'
DEVICE_TYPE = '6'

headers = {
    'Accept': 'application/json, text/plain, */*',
    'OperatorReferenceId': 'hrt',
    'Origin': 'https://hrti.hrt.hr',
    'Referer': 'https://hrti.hrt.hr/live/tv',
    'User-Agent': USER_AGENT,
}

token = ''
user_id = ''
device_id = ''

def get_auth():
    try:
        return json.load(open(SCRIPT_DIR + authFile))
    except:
        return None

def save_auth(auth_data):
    json.dump(auth_data, open(SCRIPT_DIR + authFile, 'w'), indent=2)

def check_token(tok, dev_id):
    check_headers = {**headers, 'Authorization': 'Client ' + tok, 'DeviceId': dev_id, 'DeviceTypeId': DEVICE_TYPE}
    response = req.post('https://hrti.hrt.hr/api/api/ott/GetChannels', headers=check_headers, json={})
    response.raise_for_status()
    data = response.json()
    if len(data['Result']) == 0:
        raise Exception('No channels')

def login():
    global token, user_id, device_id
    print("logging in...", file=sys.stderr)
    
    auth = get_auth()
    if auth and 'token' in auth:
        try:
            check_token(auth['token'], auth['device_id'])
            token = auth['token']
            user_id = auth['customer_id']
            device_id = auth['device_id']
            print("logged in successfully (cached token)", file=sys.stderr)
            return token
        except:
            pass
    
    print("No valid token found. Please add HRTi auth to auth file.", file=sys.stderr)
    save_auth({'token': 'ENTER_TOKEN_HERE', 'customer_id': 'ENTER_CUSTOMER_ID_HERE', 'device_id': 'ENTER_DEVICE_ID_HERE'})
    sys.exit(1)

def get_token():
    global token
    if token:
        return token
    return login()

def get_pssh_from_mpd(url):
    response = req.get(url, headers={'User-Agent': USER_AGENT})
    try:
        content_protections = BeautifulSoup(response.content, features="xml").findAll('ContentProtection')
        for cp in content_protections:
            if cp.get('schemeIdUri', '').lower() == 'urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed':
                pssh_elem = cp.find('cenc:pssh')
                if pssh_elem:
                    return pssh_elem.text
    except:
        pass
    return None

def get_lic_token(url, reference_id):
    lic_headers = {**headers, 'Authorization': 'Client ' + token, 'DeviceId': device_id, 'DeviceTypeId': DEVICE_TYPE}
    url_parts = url.split('/')
    json_data = {
        'ContentType': 'tlive',
        'ContentReferenceId': reference_id,
        'ContentDrmId': f'{url_parts[3]}_{url_parts[4]}',
        'VideostoreReferenceIds': None,
        'ChannelReferenceId': reference_id,
        'StartTime': None,
        'EndTime': None,
    }
    response = req.post('https://hrti.hrt.hr/api/api/ott/AuthorizeSession', headers=lic_headers, json=json_data)
    try:
        return response.json()['Result']['DrmId']
    except:
        return None

def do_cdm_internal(challenge_b64, lic_token):
    custom_data = '{"userId":"' + user_id + '","sessionId":"' + lic_token + '","merchant":"aviion2"}'
    lic_headers = {
        'dt-custom-data': base64.b64encode(custom_data.encode('utf-8')).decode('utf-8'),
        'origin': 'https://hrti.hrt.hr',
        'referer': 'https://hrti.hrt.hr/',
        'user-agent': USER_AGENT,
        'content-type': 'application/octet-stream',
    }
    response = req.post('https://lic.drmtoday.com/license-proxy-widevine/cenc/', headers=lic_headers, data=base64.b64decode(challenge_b64))
    try:
        data = response.json()
        return data['license']
    except:
        return None

def do_cdm_external(pssh_b64, lic_token):
    try:
        pssh_obj = PSSH(pssh_b64)
        device_obj = Device.load(WVD_PATH)
        cdm_obj = Cdm.from_device(device_obj)
        session_id = cdm_obj.open()
        challenge_data = cdm_obj.get_license_challenge(session_id, pssh_obj)
        
        custom_data = '{"userId":"' + user_id + '","sessionId":"' + lic_token + '","merchant":"aviion2"}'
        lic_headers = {
            'dt-custom-data': base64.b64encode(custom_data.encode('utf-8')).decode('utf-8'),
            'origin': 'https://hrti.hrt.hr',
            'referer': 'https://hrti.hrt.hr/',
            'user-agent': USER_AGENT,
            'content-type': 'application/octet-stream',
        }
        licence = req.post('https://lic.drmtoday.com/license-proxy-widevine/cenc/', headers=lic_headers, data=challenge_data)
        data = licence.json()
        cdm_obj.parse_license(session_id, base64.b64decode(data['license']))
        keys = []
        for key in cdm_obj.get_keys(session_id):
            if key.type != 'SIGNING':
                keys.append(f"{key.kid.hex}:{key.key.hex()}")
        cdm_obj.close(session_id)
        return keys
    except Exception as e:
        print(f'CDM external failed: {e}', file=sys.stderr)
        return None

def do_action():
    get_token()
    
    if action == "login":
        login()
        sys.exit()
    
    if action == "channels":
        output = {'Channels': []}
        ch_headers = {**headers, 'Authorization': 'Client ' + token, 'DeviceId': device_id, 'DeviceTypeId': DEVICE_TYPE}
        response = req.post('https://hrti.hrt.hr/api/api/ott/GetChannels', headers=ch_headers, json={})
        try:
            data = response.json()
            for ch in data.get('Result', []):
                if ch.get('Radio'):
                    continue
                channel = {
                    'Name': ch.get('Name', 'Unknown'),
                    'Mode': 'live',
                    'SessionManifest': True,
                    'ManifestScript': f"id={ch.get('ReferenceID', '')}&url={ch.get('StreamingURL', '')}",
                    'CdmType': 'widevine',
                    'UseCdm': True,
                    'Cdm': f"id={ch.get('ReferenceID', '')}&url={ch.get('StreamingURL', '')}",
                    'Video': 'best',
                    'OnDemand': True,
                    'SpeedUp': True,
                }
                output['Channels'].append(channel)
            print(json.dumps(output, indent=2))
        except Exception as e:
            print(f"Error: {e}", file=sys.stderr)
            return "error"
    
    elif action == "events":
        output = {'Events': []}
        print(json.dumps(output, indent=2))
    
    elif action == "heartbeat":
        sys.exit()
    
    elif action == "manifest":
        try:
            params_dict = {}
            for param in id.split('&'):
                if '=' in param:
                    k, v = param.split('=', 1)
                    params_dict[k] = v
            
            video_url = params_dict.get('url', '')
            if not video_url:
                return "error"
            
            output = {
                "Cdn": [{"Name": "default", "ManifestUrl": video_url}],
                "ManifestUrl": video_url,
                "Headers": {"Manifest": {'User-Agent': USER_AGENT}, "Media": {'User-Agent': USER_AGENT}},
                "Heartbeat": {"Url": '', "Params": '', "PeriodMs": 5*60*1000},
                "ReferenceId": params_dict.get('id', '')
            }
            print(json.dumps(output))
        except Exception as e:
            print(f"Error: {e}", file=sys.stderr)
            return "error"
    
    elif action == "cdm" and cdm == "internal":
        try:
            params_dict = {}
            for param in id.split('&'):
                if '=' in param:
                    k, v = param.split('=', 1)
                    params_dict[k] = v
            
            reference_id = params_dict.get('id', '')
            video_url = params_dict.get('url', '')
            lic_token = get_lic_token(video_url, reference_id)
            if lic_token:
                result = do_cdm_internal(challenge, lic_token)
                if result:
                    print(result)
                else:
                    return "error"
            else:
                return "error"
        except Exception as e:
            print(f"Error: {e}", file=sys.stderr)
            return "error"
    
    elif action == "cdm" and cdm == "external":
        try:
            params_dict = {}
            for param in id.split('&'):
                if '=' in param:
                    k, v = param.split('=', 1)
                    params_dict[k] = v
            
            reference_id = params_dict.get('id', '')
            video_url = params_dict.get('url', '')
            lic_token = get_lic_token(video_url, reference_id)
            if lic_token:
                pssh_to_use = pssh if pssh else get_pssh_from_mpd(video_url)
                if pssh_to_use:
                    keys = do_cdm_external(pssh_to_use, lic_token)
                    if keys:
                        for key in keys:
                            print(key)
                    else:
                        return "error"
                else:
                    return "error"
            else:
                return "error"
        except Exception as e:
            print(f"Error: {e}", file=sys.stderr)
            return "error"
    
    else:
        print("invalid action: " + action, file=sys.stderr)

if do_action() == "error":
    login()
    do_action()