#!/usr/bin/python3

"""
API Helper
===================


"""
import base64
import gzip
import json
import os
import re
import redis
import sys
import uuid

from datetime import datetime, timedelta
from urllib.parse import urlparse

from pyfaup.faup import Faup

sys.path.append(os.path.join(os.environ['AIL_BIN'], 'lib/'))
import ConfigLoader


config_loader = ConfigLoader.ConfigLoader()
r_serv_metadata = config_loader.get_redis_conn("ARDB_Metadata")
r_serv_onion = config_loader.get_redis_conn("ARDB_Onion")
r_cache = config_loader.get_redis_conn("Redis_Cache")
config_loader = None

faup = Faup()

def generate_uuid():
    return str(uuid.uuid4()).replace('-', '')

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

# # TODO: handle prefix cookies
# # TODO: fill empty fields
def create_cookie_crawler(cookie_dict, crawler_type='regular'):
    # tor browser: disable secure cookie
    if crawler_type=='onion':
        cookie_dict['secure'] = False

    # force cookie domain
    # url = urlparse(browser_cookie['Host raw'])
    # domain = url.netloc.split(':', 1)[0]
    # cookie_dict['domain'] = '.{}'.format(domain)

    # change expire date
    cookie_dict['expires'] = (datetime.now() + timedelta(days=10)).strftime('%Y-%m-%dT%H:%M:%S') + 'Z'
    return cookie_dict

def load_crawler_cookies(cookiejar_uuid, crawler_type='regular'):
    cookies = get_cookiejar_cookies_list(cookiejar_uuid)
    all_cookies = []
    for cookie_dict in cookies:
        all_cookies.append(create_cookie_crawler(cookie_dict, crawler_type=crawler_type))
    return all_cookies

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

def get_all_cookiejar():
    r_serv_onion.smembers('cookiejar:all')

def get_global_cookiejar():
    res = r_serv_onion.smembers('cookiejar:global')
    if not res:
        res = []
    return res

def get_user_cookiejar(user_id):
    res = r_serv_onion.smembers('cookiejar:user:{}'.format(user_id))
    if not res:
        res = []
    return res

def exist_cookiejar(cookiejar_uuid):
    return r_serv_onion.exists('cookiejar_metadata:{}'.format(cookiejar_uuid))

def create_cookiejar(user_id, level=1, description=None):
    cookiejar_uuid = str(uuid.uuid4())

    r_serv_onion.sadd('cookiejar:all', cookiejar_uuid)
    if level==0:
        r_serv_onion.sadd('cookiejar:user:{}'.format(user_id), cookiejar_uuid)
    else:
        r_serv_onion.sadd('cookiejar:global', cookiejar_uuid)
    # metadata
    r_serv_onion.hset('cookiejar_metadata:{}'.format(cookiejar_uuid), 'user_id', user_id)
    r_serv_onion.hset('cookiejar_metadata:{}'.format(cookiejar_uuid), 'level', level)
    r_serv_onion.hset('cookiejar_metadata:{}'.format(cookiejar_uuid), 'description', description)
    r_serv_onion.hset('cookiejar_metadata:{}'.format(cookiejar_uuid), 'date', datetime.now().strftime("%Y%m%d"))

    # if json_cookies:
    #     json_cookies = json.loads(json_cookies) # # TODO: catch Exception
    #     r_serv_onion.set('cookies:json_cookies:{}'.format(cookies_uuid), json.dumps(json_cookies))
    #
    # for cookie_dict in l_cookies:
    #     r_serv_onion.hset('cookies:manual_cookies:{}'.format(cookies_uuid), cookie_dict['name'], cookie_dict['value'])
    return cookiejar_uuid

def delete_cookie_jar(cookiejar_uuid):
    level = get_cookiejar_level(cookiejar_uuid)
    if level == 0:
        user_id = get_cookiejar_owner(cookiejar_uuid)
        r_serv_onion.srem('cookiejar:user:{}'.format(user_id), cookiejar_uuid)
    else:
        r_serv_onion.srem('cookiejar:global', cookiejar_uuid)

    r_serv_onion.delete('cookiejar_metadata:{}'.format(cookiejar_uuid))

def get_cookiejar_cookies_uuid(cookiejar_uuid):
    res = r_serv_onion.smembers('cookiejar:{}:cookies:uuid'.format(cookiejar_uuid))
    if not res:
        res = []
    return res

def get_cookiejar_cookies_list(cookiejar_uuid):
    l_cookiejar = []
    for cookie_uuid in get_cookiejar_cookies_uuid(cookiejar_uuid):
        l_cookiejar.append(get_cookie_dict(cookie_uuid))
    return l_cookiejar

## Cookiejar metadata ##
def get_cookiejar_description(cookiejar_uuid):
    return r_serv_onion.hget('cookiejar_metadata:{}'.format(cookiejar_uuid), 'description')

def get_cookiejar_date(cookiejar_uuid):
    return r_serv_onion.hget('cookiejar_metadata:{}'.format(cookiejar_uuid), 'date')

def get_cookiejar_owner(cookiejar_uuid):
    return r_serv_onion.hget('cookiejar_metadata:{}'.format(cookiejar_uuid), 'user_id')

def get_cookiejar_date(cookiejar_uuid):
    return r_serv_onion.hget('cookiejar_metadata:{}'.format(cookiejar_uuid), 'date')

def get_cookiejar_level(cookiejar_uuid):
    res = r_serv_onion.hget('cookiejar_metadata:{}'.format(cookiejar_uuid), 'level')
    if not res:
        res = 1
    return int(res)

def get_cookiejar_metadata(cookiejar_uuid, level=False):
    dict_cookiejar = {}
    if exist_cookiejar(cookiejar_uuid):
        dict_cookiejar['cookiejar_uuid'] = cookiejar_uuid
        dict_cookiejar['description'] = get_cookiejar_description(cookiejar_uuid)
        dict_cookiejar['date'] = get_cookiejar_date(cookiejar_uuid)
        dict_cookiejar['user_id'] = get_cookiejar_owner(cookiejar_uuid)
        if level:
            dict_cookiejar['level'] = get_cookies_level(cookiejar_uuid)
    return dict_cookiejar

def get_cookiejar_metadata_by_iterator(iter_cookiejar_uuid):
    l_cookiejar_metadata = []
    for cookiejar_uuid in iter_cookiejar_uuid:
        l_cookiejar_metadata.append(get_cookiejar_metadata(cookiejar_uuid))
    return l_cookiejar_metadata

# # # # # # # #
#             #
#   COOKIES   #
#             #
# # # # # # # #

# # # #
# Cookies Fields:
#   - name
#   - value
#   - path      (optional)
#   - domain    (optional)
#   - secure    (optional)
#   - httpOnly  (optional)
#   - text      (optional)
# # # #

def exists_cookie(cookie_uuid):
    if int(r_serv_onion.scard('cookies:map:cookiejar:{}'.format(cookie_uuid))) > 0:
        return True
    return False

def get_cookie_value(cookie_uuid, name):
    return r_serv_onion.hget('cookiejar:cookie:{}'.format(cookie_uuid), name)

def set_cookie_value(cookie_uuid, name, value):
    r_serv_onion.hset('cookiejar:cookie:{}'.format(cookie_uuid), name, value)

def get_cookie_dict(cookie_uuid):
    cookie_dict = {}
    for key_name in r_serv_onion.hkeys('cookiejar:cookie:{}'.format(cookie_uuid)):
        cookie_dict[key_name] = get_cookie_value(cookie_uuid, key_name)
    return cookie_dict

# name, value, path=None, httpOnly=None, secure=None, domain=None, text=None
def add_cookie_to_cookiejar(cookiejar_uuid, cookie_dict):
    cookie_uuid = generate_uuid()
    r_serv_onion.sadd('cookiejar:{}:cookies:uuid'.format(cookiejar_uuid), cookie_uuid)
    r_serv_onion.sadd('cookies:map:cookiejar:{}'.format(cookie_uuid), cookiejar_uuid)

    set_cookie_value(cookie_uuid, 'name', cookie_dict['name'])
    set_cookie_value(cookie_uuid, 'value', cookie_dict['value'])
    if 'path' in cookie_dict:
        set_cookie_value(cookie_uuid, 'path', cookie_dict['path'])
    if 'httpOnly' in cookie_dict:
        set_cookie_value(cookie_uuid, 'httpOnly', cookie_dict['httpOnly'])
    if 'secure' in cookie_dict:
        set_cookie_value(cookie_uuid, 'secure', cookie_dict['secure'])
    if 'domain' in cookie_dict:
        set_cookie_value(cookie_uuid, 'domain', cookie_dict['domain'])
    if 'text' in cookie_dict:
        set_cookie_value(cookie_uuid, 'text', cookie_dict['text'])
    return cookie_uuid

def add_cookies_to_cookiejar(cookiejar_uuid, l_cookies):
    for cookie_dict in l_cookies:
        add_cookie_to_cookiejar(cookiejar_uuid, cookie_dict)

def delete_all_cookies_from_cookiejar(cookiejar_uuid):
    for cookie_uuid in get_cookiejar_cookies_uuid(cookiejar_uuid):
        delete_cookie_from_cookiejar(cookiejar_uuid, cookie_uuid)

def delete_cookie_from_cookiejar(cookiejar_uuid, cookie_uuid):
    r_serv_onion.srem('cookiejar:{}:cookies:uuid'.format(cookiejar_uuid), cookie_uuid)
    r_serv_onion.srem('cookies:map:cookiejar:{}'.format(cookie_uuid), cookiejar_uuid)
    if not exists_cookie(cookie_uuid):
        r_serv_onion.delete('cookiejar:cookie:{}'.format(cookies_uuid))

##  - -  ##
## Cookies import ##       # TODO: add browser type ?
def import_cookies_from_json(json_cookies, cookiejar_uuid):
    for cookie in json_cookies:
        try:
            cookie_dict = unpack_imported_json_cookie(cookie)
            add_cookie_to_cookiejar(cookiejar_uuid, cookie_dict)
        except KeyError:
            return {'error': 'Invalid cookie key, please submit a valid JSON', 'cookiejar_uuid': cookiejar_uuid}

# # TODO: add text field
def unpack_imported_json_cookie(json_cookie):
    cookie_dict = {'name': json_cookie['Name raw'], 'value': json_cookie['Content raw']}
    if 'Path raw' in json_cookie:
        cookie_dict['path'] = json_cookie['Path raw']
    if 'httpOnly' in json_cookie:
        cookie_dict['httpOnly'] = json_cookie['HTTP only raw'] == 'true'
    if 'secure' in json_cookie:
        cookie_dict['secure'] = json_cookie['Send for'] == 'Encrypted connections only'
    if 'Host raw' in json_cookie:
        url = urlparse(json_cookie['Host raw'])
        cookie_dict['domain'] = url.netloc.split(':', 1)[0]
    return cookie_dict

def misp_cookie_import(misp_object, cookiejar_uuid):
    pass
##  - -  ##
#### COOKIEJAR API ####
def api_import_cookies_from_json(json_cookies_str, cookiejar_uuid): # # TODO: add catch
    json_cookies = json.loads(json_cookies_str)
    res = import_cookies_from_json(json_cookies, cookiejar_uuid)
    if res:
        return (res, 400)
#### ####

#### COOKIES API ####

def api_get_cookiejar_cookies_uuid(cookiejar_uuid, user_id):
    if not exist_cookiejar(cookiejar_uuid):
        return ({'error': 'unknow cookiejar uuid', 'cookiejar_uuid': cookiejar_uuid}, 404)
    level = get_cookiejar_level(cookiejar_uuid)
    if level == 0: # # TODO: check if user is admin
        cookie_owner = get_cookiejar_owner(cookiejar_uuid)
        if cookie_owner != user_id:
            return ({'error': 'The access to this cookiejar is restricted'}, 403)
    res = get_cookiejar_cookies_uuid(cookiejar_uuid)
    res = {'json_cookies': res[0], 'manual_cookies': res[1]}
    return (res, 200)

def api_get_cookiejar_cookies(cookiejar_uuid, user_id):
    if not exist_cookiejar(cookiejar_uuid):
        return ({'error': 'unknow cookiejar uuid', 'cookiejar_uuid': cookiejar_uuid}, 404)
    level = get_cookiejar_level(cookiejar_uuid)
    if level == 0: # # TODO: check if user is admin
        cookie_owner = get_cookiejar_owner(cookiejar_uuid)
        if cookie_owner != user_id:
            return ({'error': 'The access to this cookiejar is restricted'}, 403)
    res = get_cookiejar_cookies_list(cookiejar_uuid)
    return (res, 200)

def api_get_cookies_list_select(user_id):
    l_cookiejar = []
    for cookies_uuid in get_global_cookiejar():
        l_cookiejar.append('{} : {}'.format(get_cookiejar_description(cookies_uuid), cookies_uuid))
    for cookies_uuid in get_user_cookiejar(user_id):
        l_cookiejar.append('{} : {}'.format(get_cookiejar_description(cookies_uuid), cookies_uuid))
    return sorted(l_cookiejar)
#### ####

#### CRAWLER TASK ####
def create_crawler_task(url, screenshot=True, har=True, depth_limit=1, max_pages=100, auto_crawler=False, crawler_delta=3600, cookiejar_uuid=None, user_agent=None):
    crawler_config = {}
    crawler_config['depth_limit'] = depth_limit
    crawler_config['closespider_pagecount'] = max_pages

    if screenshot:
        crawler_config['screenshot'] = True
    else:
        crawler_config['screenshot'] = False
    if har:
        crawler_config['har'] = True
    else:
        crawler_config['har'] = False

    if user_agent:
        crawler_config['user_agent'] = user_agent
    if cookiejar_uuid:
        crawler_config['cookiejar_uuid'] = cookiejar_uuid

    if auto_crawler:
        crawler_mode = 'auto'
    else:
        crawler_mode = 'manual'

    # get crawler_mode
    faup.decode(url)
    unpack_url = faup.get()
    ## TODO: # FIXME: remove me
    try:
        domain = unpack_url['domain'].decode()
    except:
        domain = unpack_url['domain']

    ## TODO: # FIXME: remove me
    try:
        tld = unpack_url['tld'].decode()
    except:
        tld = unpack_url['tld']
    if tld == 'onion':
        crawler_type = 'onion'
    else:
        crawler_type = 'regular'

    save_crawler_config(crawler_mode, crawler_type, crawler_config, domain, url=url)
    send_url_to_crawl_in_queue(crawler_mode, crawler_type, url)

def save_crawler_config(crawler_mode, crawler_type, crawler_config, domain, url=None):
    if crawler_mode == 'manual':
        r_cache.set('crawler_config:{}:{}:{}'.format(crawler_mode, crawler_type, domain), json.dumps(crawler_config))
    elif crawler_mode == 'auto':
        r_serv_onion.set('crawler_config:{}:{}:{}:{}'.format(crawler_type, crawler_type, domain, url), json.dumps(crawler_config))

def send_url_to_crawl_in_queue(crawler_mode, crawler_type, url):
    r_serv_onion.sadd('{}_crawler_priority_queue'.format(crawler_type), '{};{}'.format(url, crawler_mode))
    # add auto crawled url for user UI
    if crawler_mode == 'auto':
        r_serv_onion.sadd('auto_crawler_url:{}'.format(crawler_type), url)

#### ####
#### CRAWLER TASK API ####
def api_create_crawler_task(user_id, url, screenshot=True, har=True, depth_limit=1, max_pages=100, auto_crawler=False, crawler_delta=3600, cookiejar_uuid=None, user_agent=None):
    # validate url
    if url is None or url=='' or url=='\n':
        return ({'error':'invalid depth limit'}, 400)

    if depth_limit:
        try:
            depth_limit = int(depth_limit)
            if depth_limit < 0:
                depth_limit = 0
        except ValueError:
            return ({'error':'invalid depth limit'}, 400)
    if max_pages:
        try:
            max_pages = int(max_pages)
            if max_pages < 1:
                max_pages = 1
        except ValueError:
            return ({'error':'invalid max_pages limit'}, 400)

    if auto_crawler:
        try:
            crawler_time = int(crawler_time)
            if crawler_time < 0:
                return ({'error':'invalid delta bettween two pass of the crawler'}, 400)
        except ValueError:
            return ({'error':'invalid delta bettween two pass of the crawler'}, 400)

    if cookiejar_uuid:
        if not exist_cookiejar(cookiejar_uuid):
            return ({'error': 'unknow cookiejar uuid', 'cookiejar_uuid': cookiejar_uuid}, 404)
        level = get_cookiejar_level(cookiejar_uuid)
        if level == 0: # # TODO: check if user is admin
            cookie_owner = get_cookiejar_owner(cookiejar_uuid)
            if cookie_owner != user_id:
                return ({'error': 'The access to this cookiejar is restricted'}, 403)

    create_crawler_task(url, screenshot=screenshot, har=har, depth_limit=depth_limit, max_pages=max_pages,
                        auto_crawler=auto_crawler, crawler_delta=crawler_delta, cookiejar_uuid=cookiejar_uuid, user_agent=user_agent)
    return None
#### ####

def is_redirection(domain, last_url):
    url = urlparse(last_url)
    last_domain = url.netloc
    last_domain = last_domain.split('.')
    last_domain = '{}.{}'.format(last_domain[-2], last_domain[-1])
    return domain != last_domain

# domain up
def create_domain_metadata(domain_type, domain, current_port, date, date_month):
    # Add to global set
    r_serv_onion.sadd('{}_up:{}'.format(domain_type, date), domain)
    r_serv_onion.sadd('full_{}_up'.format(domain_type), domain)
    r_serv_onion.sadd('month_{}_up:{}'.format(domain_type, date_month), domain)

    # create onion metadata
    if not r_serv_onion.exists('{}_metadata:{}'.format(domain_type, domain)):
        r_serv_onion.hset('{}_metadata:{}'.format(domain_type, domain), 'first_seen', date)
    r_serv_onion.hset('{}_metadata:{}'.format(domain_type, domain), 'last_check', date)

    # Update domain port number
    all_domain_ports = r_serv_onion.hget('{}_metadata:{}'.format(domain_type, domain), 'ports')
    if all_domain_ports:
        all_domain_ports = all_domain_ports.split(';')
    else:
        all_domain_ports = []
    if current_port not in all_domain_ports:
        all_domain_ports.append(current_port)
        r_serv_onion.hset('{}_metadata:{}'.format(domain_type, domain), 'ports', ';'.join(all_domain_ports))

# add root_item to history
def add_domain_root_item(root_item, domain_type, domain, epoch_date, port):
    # Create/Update crawler history
    r_serv_onion.zadd('crawler_history_{}:{}:{}'.format(domain_type, domain, port), epoch_date, root_item)

def create_item_metadata(item_id, domain, url, port, item_father):
    r_serv_metadata.hset('paste_metadata:{}'.format(item_id), 'father', item_father)
    r_serv_metadata.hset('paste_metadata:{}'.format(item_id), 'domain', '{}:{}'.format(domain, port))
    r_serv_metadata.hset('paste_metadata:{}'.format(item_id), 'real_link', url)
    # add this item_id to his father
    r_serv_metadata.sadd('paste_children:{}'.format(item_father), item_id)

def create_item_id(item_dir, domain):
    if len(domain) > 215:
        UUID = domain[-215:]+str(uuid.uuid4())
    else:
        UUID = domain+str(uuid.uuid4())
    return os.path.join(item_dir, UUID)

def save_crawled_item(item_id, item_content):
    try:
        gzipencoded = gzip.compress(item_content.encode())
        gzip64encoded = base64.standard_b64encode(gzipencoded).decode()
        return gzip64encoded
    except:
        print("file error: {}".format(item_id))
        return False

def save_har(har_dir, item_id, har_content):
    if not os.path.exists(har_dir):
        os.makedirs(har_dir)
    item_id = item_id.split('/')[-1]
    filename = os.path.join(har_dir, item_id + '.json')
    with open(filename, 'w') as f:
        f.write(json.dumps(har_content))