#!/usr/bin/env python3
# -*- coding: utf-8 -*-

from io import BytesIO, StringIO
from datetime import datetime, timedelta, timezone, date
import json
import http
import calendar
from typing import Optional, Dict, Any, Union, List
import logging
from urllib.parse import quote_plus, unquote_plus, urlparse
import time
import pkg_resources

from flask import Flask, render_template, request, send_file, redirect, url_for, Response, flash, jsonify
from flask_bootstrap import Bootstrap  # type: ignore
import flask_login  # type: ignore
from flask_restx import Api  # type: ignore
from .genericapi import api as generic_api
from werkzeug.security import check_password_hash

from pymisp import MISPEvent, MISPServerError

from lookyloo.helpers import (get_user_agents, get_config, get_taxonomies, load_cookies,
                              CaptureStatus, splash_status, get_capture_status)
from lookyloo.lookyloo import Lookyloo, Indexing
from lookyloo.exceptions import NoValidHarFile, MissingUUID

from .proxied import ReverseProxied
from .helpers import (src_request_ip, User, load_user_from_request, build_users_table,
                      get_secret_key, sri_load)

app: Flask = Flask(__name__)
app.wsgi_app = ReverseProxied(app.wsgi_app)  # type: ignore

app.config['SECRET_KEY'] = get_secret_key()

Bootstrap(app)
app.config['BOOTSTRAP_SERVE_LOCAL'] = True
app.config['SESSION_COOKIE_NAME'] = 'lookyloo'
app.config['SESSION_COOKIE_SAMESITE'] = 'Strict'
app.debug = False

# Auth stuff
login_manager = flask_login.LoginManager()
login_manager.init_app(app)


@login_manager.user_loader
def user_loader(username):
    if username not in build_users_table():
        return None
    user = User()
    user.id = username
    return user


@login_manager.request_loader
def _load_user_from_request(request):
    return load_user_from_request(request)


@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'GET':
        return '''
               <form action='login' method='POST'>
                <input type='text' name='username' id='username' placeholder='username'/>
                <input type='password' name='password' id='password' placeholder='password'/>
                <input type='submit' name='submit'/>
               </form>
               '''

    username = request.form['username']
    users_table = build_users_table()
    if username in users_table and check_password_hash(users_table[username]['password'], request.form['password']):
        user = User()
        user.id = username
        flask_login.login_user(user)
        flash(f'Logged in as: {flask_login.current_user.id}', 'success')
    else:
        flash(f'Unable to login as: {username}', 'error')

    return redirect(url_for('index'))


@app.route('/logout')
@flask_login.login_required
def logout():
    flask_login.logout_user()
    flash('Successfully logged out.', 'success')
    return redirect(url_for('index'))


# Config

lookyloo: Lookyloo = Lookyloo()

time_delta_on_index = get_config('generic', 'time_delta_on_index')
blur_screenshot = get_config('generic', 'enable_default_blur_screenshot')
max_depth = get_config('generic', 'max_depth')

use_own_ua = get_config('generic', 'use_user_agents_users')
enable_mail_notification = get_config('generic', 'enable_mail_notification')
if enable_mail_notification:
    confirm_message = get_config('generic', 'email').get('confirm_message')
else:
    confirm_message = ''
enable_context_by_users = get_config('generic', 'enable_context_by_users')
enable_categorization = get_config('generic', 'enable_categorization')
enable_bookmark = get_config('generic', 'enable_bookmark')
auto_trigger_modules = get_config('generic', 'auto_trigger_modules')
hide_captures_with_error = get_config('generic', 'hide_captures_with_error')

logging.basicConfig(level=get_config('generic', 'loglevel'))


# ##### Global methods passed to jinja

# Method to make sizes in bytes human readable
# Source: https://stackoverflow.com/questions/1094841/reusable-library-to-get-human-readable-version-of-file-size
def sizeof_fmt(num, suffix='B'):
    for unit in ['', 'Ki', 'Mi', 'Gi', 'Ti', 'Pi', 'Ei', 'Zi']:
        if abs(num) < 1024.0:
            return "%3.1f%s%s" % (num, unit, suffix)
        num /= 1024.0
    return ("%.1f%s%s" % (num, 'Yi', suffix)).strip()


app.jinja_env.globals.update(sizeof_fmt=sizeof_fmt)


def http_status_description(code: int):
    if code in http.client.responses:
        return http.client.responses[code]
    return f'Invalid code: {code}'


app.jinja_env.globals.update(http_status_description=http_status_description)


def month_name(month: int):
    return calendar.month_name[month]


app.jinja_env.globals.update(month_name=month_name)


def get_sri(directory: str, filename: str) -> str:
    sha512 = sri_load()[directory][filename]
    return f'sha512-{sha512}'


app.jinja_env.globals.update(get_sri=get_sri)


# ##### Generic/configuration methods #####

@app.after_request
def after_request(response):
    if use_own_ua:
        # We keep a list user agents in order to build a list to use in the capture
        # interface: this is the easiest way to have something up to date.
        # The reason we also get the IP address of the client is because we
        # count the frequency of each user agents and use it to sort them on the
        # capture page, and we want to avoid counting the same user (same IP)
        # multiple times in a day.
        # The cache of IPs is deleted after the UA file is generated once a day.
        # See bin/background_processing.py
        ua = request.headers.get('User-Agent')
        real_ip = src_request_ip(request)
        if ua:
            today = date.today().isoformat()
            lookyloo.redis.zincrby(f'user_agents|{today}', 1, f'{real_ip}|{ua}')
    # Opt out of FLoC
    response.headers.set('Permissions-Policy', 'interest-cohort=()')
    return response


# ##### Hostnode level methods #####

@app.route('/tree/<string:tree_uuid>/host/<string:node_uuid>/hashes', methods=['GET'])
def hashes_hostnode(tree_uuid: str, node_uuid: str):
    hashes = lookyloo.get_hashes(tree_uuid, hostnode_uuid=node_uuid)
    return send_file(BytesIO('\n'.join(hashes).encode()),
                     mimetype='test/plain', as_attachment=True, attachment_filename=f'hashes.{node_uuid}.txt')


@app.route('/tree/<string:tree_uuid>/host/<string:node_uuid>/text', methods=['GET'])
def urls_hostnode(tree_uuid: str, node_uuid: str):
    hostnode = lookyloo.get_hostnode_from_tree(tree_uuid, node_uuid)
    return send_file(BytesIO('\n'.join(url.name for url in hostnode.urls).encode()),
                     mimetype='test/plain', as_attachment=True, attachment_filename=f'urls.{node_uuid}.txt')


@app.route('/tree/<string:tree_uuid>/host/<string:node_uuid>', methods=['GET'])
def hostnode_popup(tree_uuid: str, node_uuid: str):
    keys_response = {
        'js': {'icon': "javascript.png", 'tooltip': 'The content of the response is a javascript'},
        'exe': {'icon': "exe.png", 'tooltip': 'The content of the response is an executable'},
        'css': {'icon': "css.png", 'tooltip': 'The content of the response is a CSS'},
        'font': {'icon': "font.png", 'tooltip': 'The content of the response is a font'},
        'html': {'icon': "html.png", 'tooltip': 'The content of the response is a HTML document'},
        'json': {'icon': "json.png", 'tooltip': 'The content of the response is a Json'},
        'text': {'icon': "json.png", 'tooltip': 'The content of the response is a text'},  # FIXME: Need new icon
        'iframe': {'icon': "ifr.png", 'tooltip': 'This content is loaded from an Iframe'},
        'image': {'icon': "img.png", 'tooltip': 'The content of the response is an image'},
        'unset_mimetype': {'icon': "wtf.png", 'tooltip': 'The type of content of the response is not set'},
        'octet-stream': {'icon': "wtf.png", 'tooltip': 'The type of content of the response is a binary blob'},
        'unknown_mimetype': {'icon': "wtf.png", 'tooltip': 'The type of content of the response is of an unknown type'},
        'video': {'icon': "video.png", 'tooltip': 'The content of the response is a video'},
        'livestream': {'icon': "video.png", 'tooltip': 'The content of the response is a livestream'},
        'response_cookie': {'icon': "cookie_received.png", 'tooltip': 'There are cookies in the response'},
        # redirect has to be last
        'redirect': {'icon': "redirect.png", 'tooltip': 'The request is redirected'},
        'redirect_to_nothing': {'icon': "cookie_in_url.png", 'tooltip': 'The request is redirected to an URL we do not have in the capture'}
    }
    keys_request = {
        'request_cookie': {'icon': "cookie_read.png", 'tooltip': 'There are cookies in the request'}
    }

    hostnode, urls = lookyloo.get_hostnode_investigator(tree_uuid, node_uuid)

    return render_template('hostname_popup.html',
                           tree_uuid=tree_uuid,
                           hostnode_uuid=node_uuid,
                           hostnode=hostnode,
                           urls=urls,
                           keys_response=keys_response,
                           keys_request=keys_request,
                           enable_context_by_users=enable_context_by_users,
                           uwhois_available=lookyloo.uwhois.available)


# ##### Tree level Methods #####

@app.route('/tree/<string:tree_uuid>/trigger_modules', methods=['GET'])
def trigger_modules(tree_uuid: str):
    force = True if (request.args.get('force') and request.args.get('force') == 'True') else False
    auto_trigger = True if (request.args.get('auto_trigger') and request.args.get('auto_trigger') == 'True') else False
    lookyloo.trigger_modules(tree_uuid, force=force, auto_trigger=auto_trigger)
    return redirect(url_for('modules', tree_uuid=tree_uuid))


@app.route('/tree/<string:tree_uuid>/categories_capture/', defaults={'query': ''})
@app.route('/tree/<string:tree_uuid>/categories_capture/<string:query>', methods=['GET'])
def categories_capture(tree_uuid: str, query: str):
    if not enable_categorization:
        return redirect(url_for('tree', tree_uuid=tree_uuid))
    current_categories = lookyloo.categories_capture(tree_uuid)
    matching_categories = None
    if query:
        matching_categories = {}
        t = get_taxonomies()
        entries = t.search(query)
        if entries:
            matching_categories = {e: t.revert_machinetag(e) for e in entries}
    return render_template('categories_capture.html', tree_uuid=tree_uuid,
                           current_categories=current_categories,
                           matching_categories=matching_categories)


@app.route('/tree/<string:tree_uuid>/uncategorize/', defaults={'category': ''})
@app.route('/tree/<string:tree_uuid>/uncategorize/<string:category>', methods=['GET'])
def uncategorize_capture(tree_uuid: str, category: str):
    if not enable_categorization:
        return jsonify({'response': 'Categorization not enabled.'})
    lookyloo.uncategorize_capture(tree_uuid, category)
    return jsonify({'response': f'{category} successfully added to {tree_uuid}'})


@app.route('/tree/<string:tree_uuid>/categorize/', defaults={'category': ''})
@app.route('/tree/<string:tree_uuid>/categorize/<string:category>', methods=['GET'])
def categorize_capture(tree_uuid: str, category: str):
    if not enable_categorization:
        return jsonify({'response': 'Categorization not enabled.'})
    lookyloo.categorize_capture(tree_uuid, category)
    return jsonify({'response': f'{category} successfully removed from {tree_uuid}'})


@app.route('/tree/<string:tree_uuid>/stats', methods=['GET'])
def stats(tree_uuid: str):
    stats = lookyloo.get_statistics(tree_uuid)
    return render_template('statistics.html', uuid=tree_uuid, stats=stats)


@app.route('/tree/<string:tree_uuid>/misp_lookup', methods=['GET'])
@flask_login.login_required
def web_misp_lookup_view(tree_uuid: str):
    hits = lookyloo.get_misp_occurrences(tree_uuid)
    if hits:
        misp_root_url = lookyloo.misp.client.root_url
    else:
        misp_root_url = ''
    return render_template('misp_lookup.html', uuid=tree_uuid, hits=hits, misp_root_url=misp_root_url)


@app.route('/tree/<string:tree_uuid>/misp_push', methods=['GET', 'POST'])
@flask_login.login_required
def web_misp_push_view(tree_uuid: str):
    error = False
    if not lookyloo.misp.available:
        flash('MISP module not available.', 'error')
        return redirect(url_for('tree', tree_uuid=tree_uuid))
    elif not lookyloo.misp.enable_push:
        flash('Push not enabled in MISP module.', 'error')
        return redirect(url_for('tree', tree_uuid=tree_uuid))
    else:
        event = lookyloo.misp_export(tree_uuid)
        if isinstance(event, dict):
            flash(f'Unable to generate the MISP export: {event}', 'error')
            return redirect(url_for('tree', tree_uuid=tree_uuid))

    if request.method == 'POST':
        # event is a MISPEvent at this point
        # Submit the event
        tags = request.form.getlist('tags')
        error = False
        events: List[MISPEvent] = []
        with_parents = request.form.get('with_parents')
        if with_parents:
            exports = lookyloo.misp_export(tree_uuid, True)
            if isinstance(exports, dict):
                flash(f'Unable to create event: {exports}', 'error')
                error = True
            else:
                events = exports
        else:
            events = event

        if error:
            return redirect(url_for('tree', tree_uuid=tree_uuid))

        for e in events:
            for tag in tags:
                e.add_tag(tag)

        # Change the event info field of the last event in the chain
        events[-1].info = request.form.get('event_info')

        try:
            new_events = lookyloo.misp.push(events, True if request.form.get('force_push') else False,
                                            True if request.form.get('auto_publish') else False)
        except MISPServerError:
            flash(f'MISP returned an error, the event(s) might still have been created on {lookyloo.misp.client.root_url}', 'error')
        else:
            if isinstance(new_events, dict):
                flash(f'Unable to create event(s): {new_events}', 'error')
            else:
                for e in new_events:
                    flash(f'MISP event {e.id} created on {lookyloo.misp.client.root_url}', 'success')
        return redirect(url_for('tree', tree_uuid=tree_uuid))
    else:
        # the 1st attribute in the event is the link to lookyloo
        existing_misp_url = lookyloo.misp.get_existing_event_url(event[-1].attributes[0].value)

    fav_tags = lookyloo.misp.get_fav_tags()
    cache = lookyloo.capture_cache(tree_uuid)

    return render_template('misp_push_view.html', tree_uuid=tree_uuid,
                           event=event[0], fav_tags=fav_tags,
                           existing_event=existing_misp_url,
                           auto_publish=lookyloo.misp.auto_publish,
                           has_parent=True if cache and cache.parent else False,
                           default_tags=lookyloo.misp.default_tags)


@app.route('/tree/<string:tree_uuid>/modules', methods=['GET'])
def modules(tree_uuid: str):
    modules_responses = lookyloo.get_modules_responses(tree_uuid)
    if not modules_responses:
        return redirect(url_for('tree', tree_uuid=tree_uuid))

    vt_short_result: Dict[str, Dict[str, Any]] = {}
    if 'vt' in modules_responses:
        # VirusTotal cleanup
        vt = modules_responses.pop('vt')
        # Get malicious entries
        for url, full_report in vt.items():
            if not full_report:
                continue
            vt_short_result[url] = {
                'permaurl': f'https://www.virustotal.com/gui/url/{full_report["id"]}/detection',
                'malicious': []
            }
            for vendor, result in full_report['attributes']['last_analysis_results'].items():
                if result['category'] == 'malicious':
                    vt_short_result[url]['malicious'].append((vendor, result['result']))

    pi_short_result: Dict[str, str] = {}
    if 'pi' in modules_responses:
        pi = modules_responses.pop('pi')
        for url, full_report in pi.items():
            if not full_report:
                continue
            pi_short_result[url] = full_report['results'][0]['tag_label']

    urlscan_to_display: Dict = {}
    if 'urlscan' in modules_responses:
        urlscan = modules_responses.pop('urlscan')
        urlscan_to_display = {'permaurl': '', 'malicious': False, 'tags': []}
        if urlscan['submission'] and urlscan['submission'].get('result'):
            urlscan_to_display['permaurl'] = urlscan['submission']['result']
            if urlscan['result']:
                # We have a result available, get the verdicts
                if (urlscan['result'].get('verdicts')
                        and urlscan['result']['verdicts'].get('overall')):
                    if urlscan['result']['verdicts']['overall'].get('malicious') is not None:
                        urlscan_to_display['malicious'] = urlscan['result']['verdicts']['overall']['malicious']
                    if urlscan['result']['verdicts']['overall'].get('tags'):
                        urlscan_to_display['tags'] = urlscan['result']['verdicts']['overall']['tags']
        else:
            # unable to run the query, probably an invalid key
            pass
    return render_template('modules.html', uuid=tree_uuid, vt=vt_short_result, pi=pi_short_result, urlscan=urlscan_to_display)


@app.route('/tree/<string:tree_uuid>/redirects', methods=['GET'])
def redirects(tree_uuid: str):
    cache = lookyloo.capture_cache(tree_uuid)
    if not cache:
        return Response('Not available.', mimetype='text/text')
    if not cache.redirects:
        return Response('No redirects.', mimetype='text/text')
    if cache.url == cache.redirects[0]:
        to_return = BytesIO('\n'.join(cache.redirects).encode())
    else:
        to_return = BytesIO('\n'.join([cache.url] + cache.redirects).encode())
    return send_file(to_return, mimetype='text/text',
                     as_attachment=True, attachment_filename='redirects.txt')


@app.route('/tree/<string:tree_uuid>/image', methods=['GET'])
def image(tree_uuid: str):
    max_width = request.args.get('width')
    if max_width:
        to_return = lookyloo.get_screenshot_thumbnail(tree_uuid, width=int(max_width))
    else:
        to_return = lookyloo.get_screenshot(tree_uuid)
    return send_file(to_return, mimetype='image/png',
                     as_attachment=True, attachment_filename='image.png')


@app.route('/tree/<string:tree_uuid>/thumbnail/', defaults={'width': 64}, methods=['GET'])
@app.route('/tree/<string:tree_uuid>/thumbnail/<int:width>', methods=['GET'])
def thumbnail(tree_uuid: str, width: int):
    to_return = lookyloo.get_screenshot_thumbnail(tree_uuid, for_datauri=False, width=width)
    return send_file(to_return, mimetype='image/png')


@app.route('/tree/<string:tree_uuid>/html', methods=['GET'])
def html(tree_uuid: str):
    to_return = lookyloo.get_html(tree_uuid)
    return send_file(to_return, mimetype='text/html',
                     as_attachment=True, attachment_filename='page.html')


@app.route('/tree/<string:tree_uuid>/cookies', methods=['GET'])
def cookies(tree_uuid: str):
    to_return = lookyloo.get_cookies(tree_uuid)
    return send_file(to_return, mimetype='application/json',
                     as_attachment=True, attachment_filename='cookies.json')


@app.route('/tree/<string:tree_uuid>/hashes', methods=['GET'])
def hashes_tree(tree_uuid: str):
    hashes = lookyloo.get_hashes(tree_uuid)
    return send_file(BytesIO('\n'.join(hashes).encode()),
                     mimetype='test/plain', as_attachment=True, attachment_filename='hashes.txt')


@app.route('/tree/<string:tree_uuid>/export', methods=['GET'])
def export(tree_uuid: str):
    to_return = lookyloo.get_capture(tree_uuid)
    return send_file(to_return, mimetype='application/zip',
                     as_attachment=True, attachment_filename='capture.zip')


@app.route('/tree/<string:tree_uuid>/urls_rendered_page', methods=['GET'])
def urls_rendered_page(tree_uuid: str):
    urls = lookyloo.get_urls_rendered_page(tree_uuid)
    return render_template('urls_rendered.html', base_tree_uuid=tree_uuid, urls=urls)


@app.route('/bulk_captures/<string:base_tree_uuid>', methods=['POST'])
def bulk_captures(base_tree_uuid: str):
    if flask_login.current_user.is_authenticated:
        user = flask_login.current_user.get_id()
    else:
        user = src_request_ip(request)
    selected_urls = request.form.getlist('url')
    urls = lookyloo.get_urls_rendered_page(base_tree_uuid)
    ct = lookyloo.get_crawled_tree(base_tree_uuid)
    cookies = load_cookies(lookyloo.get_cookies(base_tree_uuid))
    bulk_captures = []
    for url in [urls[int(selected_id) - 1] for selected_id in selected_urls]:
        capture = {'url': url,
                   'cookies': cookies,
                   'referer': ct.root_url,
                   'user_agent': ct.user_agent,
                   'parent': base_tree_uuid
                   }
        new_capture_uuid = lookyloo.enqueue_capture(capture, source='web', user=user, authenticated=flask_login.current_user.is_authenticated)
        bulk_captures.append((new_capture_uuid, url))

    return render_template('bulk_captures.html', uuid=base_tree_uuid, bulk_captures=bulk_captures)


@app.route('/tree/<string:tree_uuid>/hide', methods=['GET'])
@flask_login.login_required
def hide_capture(tree_uuid: str):
    lookyloo.hide_capture(tree_uuid)
    return redirect(url_for('tree', tree_uuid=tree_uuid))


@app.route('/tree/<string:tree_uuid>/rebuild')
@flask_login.login_required
def rebuild_tree(tree_uuid: str):
    try:
        lookyloo.remove_pickle(tree_uuid)
        return redirect(url_for('tree', tree_uuid=tree_uuid))
    except Exception:
        return redirect(url_for('index'))


@app.route('/tree/<string:tree_uuid>/cache', methods=['GET'])
def cache_tree(tree_uuid: str):
    lookyloo.capture_cache(tree_uuid)
    return redirect(url_for('index'))


@app.route('/tree/<string:tree_uuid>/send_mail', methods=['POST', 'GET'])
def send_mail(tree_uuid: str):
    if not enable_mail_notification:
        return redirect(url_for('tree', tree_uuid=tree_uuid))
    if request.form.get('name') or not request.form.get('confirm'):
        # got a bot.
        logging.info(f'{src_request_ip(request)} is a bot - {request.headers.get("User-Agent")}.')
        return redirect('https://www.youtube.com/watch?v=iwGFalTRHDA')

    email: str = request.form['email'] if request.form.get('email') else ''
    if '@' not in email:
        # skip clearly incorrect emails
        email = ''
    comment: str = request.form['comment'] if request.form.get('comment') else ''
    lookyloo.send_mail(tree_uuid, email, comment)
    flash("Email notification sent", 'success')
    return redirect(url_for('tree', tree_uuid=tree_uuid))


@app.route('/tree/<string:tree_uuid>', methods=['GET'])
@app.route('/tree/<string:tree_uuid>/<string:node_uuid>', methods=['GET'])
def tree(tree_uuid: str, node_uuid: Optional[str]=None):
    if tree_uuid == 'False':
        flash("Unable to process your request. The domain may not exist, or splash isn't started", 'error')
        return redirect(url_for('index'))
    cache = lookyloo.capture_cache(tree_uuid)
    if not cache:
        status = get_capture_status(tree_uuid)
        splash_up, splash_message = splash_status()
        if not splash_up:
            flash(f'The capture module is not reachable ({splash_message}).', 'error')
            flash('The request will be enqueued, but capturing may take a while and require the administrator to wake up.', 'error')
        if status == CaptureStatus.UNKNOWN:
            flash(f'Unable to find this UUID ({tree_uuid}).', 'error')
            return redirect(url_for('index'))
        elif status == CaptureStatus.QUEUED:
            message = "The capture is queued, but didn't start yet."
        elif status == CaptureStatus.ONGOING:
            message = "The capture is ongoing."
        return render_template('tree_wait.html', message=message, tree_uuid=tree_uuid)

    if not cache:
        flash('Invalid cache.', 'error')
        return redirect(url_for('index'))

    if cache.error:
        flash(cache.error, 'error')

    try:
        ct = lookyloo.get_crawled_tree(tree_uuid)
        b64_thumbnail = lookyloo.get_screenshot_thumbnail(tree_uuid, for_datauri=True)
        screenshot_size = lookyloo.get_screenshot(tree_uuid).getbuffer().nbytes
        info = lookyloo.get_info(tree_uuid)
        meta = lookyloo.get_meta(tree_uuid)
        hostnode_to_highlight = None
        if node_uuid:
            try:
                urlnode = ct.root_hartree.get_url_node_by_uuid(node_uuid)
                if urlnode:
                    hostnode_to_highlight = urlnode.hostnode_uuid
            except IndexError:
                # node_uuid is not a urlnode, trying a hostnode
                try:
                    hostnode = ct.root_hartree.get_host_node_by_uuid(node_uuid)
                    if hostnode:
                        hostnode_to_highlight = hostnode.uuid
                except IndexError as e:
                    print(e)
                    pass
        return render_template('tree.html', tree_json=ct.to_json(),
                               info=info,
                               tree_uuid=tree_uuid, public_domain=lookyloo.public_domain,
                               screenshot_thumbnail=b64_thumbnail, page_title=cache.title,
                               screenshot_size=screenshot_size,
                               meta=meta, enable_mail_notification=enable_mail_notification,
                               enable_context_by_users=enable_context_by_users,
                               enable_categorization=enable_categorization,
                               enable_bookmark=enable_bookmark,
                               misp_push=lookyloo.misp.available and lookyloo.misp.enable_push,
                               misp_lookup=lookyloo.misp.available and lookyloo.misp.enable_lookup,
                               blur_screenshot=blur_screenshot, urlnode_uuid=hostnode_to_highlight,
                               auto_trigger_modules=auto_trigger_modules,
                               confirm_message=confirm_message if confirm_message else 'Tick to confirm.',
                               parent_uuid=cache.parent,
                               has_redirects=True if cache.redirects else False)

    except NoValidHarFile as e:
        return render_template('error.html', error_message=e)


@app.route('/tree/<string:tree_uuid>/mark_as_legitimate', methods=['POST'])
@flask_login.login_required
def mark_as_legitimate(tree_uuid: str):
    if request.data:
        legitimate_entries: Dict = request.get_json(force=True)
        lookyloo.add_to_legitimate(tree_uuid, **legitimate_entries)
    else:
        lookyloo.add_to_legitimate(tree_uuid)
    return jsonify({'message': 'Legitimate entry added.'})


# ##### helpers #####

def index_generic(show_hidden: bool=False, show_error: bool=True, category: Optional[str]=None):
    titles = []
    cut_time: Optional[datetime] = None
    if time_delta_on_index:
        # We want to filter the captures on the index
        cut_time = (datetime.now() - timedelta(**time_delta_on_index)).replace(tzinfo=timezone.utc)

    for cached in lookyloo.sorted_capture_cache():
        if cut_time and cached.timestamp < cut_time:
            continue

        if category:
            if not cached.categories or category not in cached.categories:
                continue

        if show_hidden:
            # Only display the hidden ones
            if not cached.no_index:
                continue
        elif cached.no_index:
            continue

        if not show_error and cached.error:
            continue

        titles.append((cached.uuid, cached.title, cached.timestamp.isoformat(), cached.url,
                       cached.redirects, cached.incomplete_redirects))
    titles = sorted(titles, key=lambda x: (x[2], x[3]), reverse=True)
    return render_template('index.html', titles=titles, public_domain=lookyloo.public_domain)


def get_index_params(request):
    show_error: bool = True
    category: str = ''
    if hide_captures_with_error:
        show_error = True if (request.args.get('show_error') and request.args.get('show_error') == 'True') else False

    if enable_categorization:
        category = request.args['category'] if request.args.get('category') else ''
    return show_error, category


# ##### Index level methods #####

@app.route('/', methods=['GET'])
def index():
    if request.method == 'HEAD':
        # Just returns ack if the webserver is running
        return 'Ack'
    show_error, category = get_index_params(request)
    return index_generic(show_error=show_error)


@app.route('/hidden', methods=['GET'])
@flask_login.login_required
def index_hidden():
    show_error, category = get_index_params(request)
    return index_generic(show_hidden=True, show_error=show_error, category=category)


@app.route('/cookies', methods=['GET'])
def cookies_lookup():
    i = Indexing()
    cookies_names = [(name, freq, i.cookies_names_number_domains(name)) for name, freq in i.cookies_names]
    return render_template('cookies.html', cookies_names=cookies_names)


@app.route('/ressources', methods=['GET'])
def ressources():
    i = Indexing()
    ressources = []
    for h, freq in i.ressources:
        domain_freq = i.ressources_number_domains(h)
        context = lookyloo.context.find_known_content(h)
        capture_uuid, url_uuid, hostnode_uuid = i.get_hash_uuids(h)
        try:
            ressource = lookyloo.get_ressource(capture_uuid, url_uuid, h)
        except MissingUUID:
            pass
        if ressource:
            ressources.append((h, freq, domain_freq, context.get(h), capture_uuid, url_uuid, hostnode_uuid, ressource[0], ressource[2]))
        else:
            ressources.append((h, freq, domain_freq, context.get(h), capture_uuid, url_uuid, hostnode_uuid, 'unknown', 'unknown'))
    return render_template('ressources.html', ressources=ressources)


@app.route('/categories', methods=['GET'])
def categories():
    i = Indexing()
    return render_template('categories.html', categories=i.categories)


@app.route('/rebuild_all')
@flask_login.login_required
def rebuild_all():
    lookyloo.rebuild_all()
    return redirect(url_for('index'))


@app.route('/rebuild_cache')
@flask_login.login_required
def rebuild_cache():
    lookyloo.rebuild_cache()
    return redirect(url_for('index'))


@app.route('/search', methods=['GET', 'POST'])
def search():
    if request.form.get('url'):
        quoted_url: str = quote_plus(request.form['url'])
        return redirect(url_for('url_details', url=quoted_url))
    if request.form.get('hostname'):
        return redirect(url_for('hostname_details', hostname=request.form.get('hostname')))
    if request.form.get('ressource'):
        return redirect(url_for('body_hash_details', body_hash=request.form.get('ressource')))
    if request.form.get('cookie'):
        return redirect(url_for('cookies_name_detail', cookie_name=request.form.get('cookie')))
    return render_template('search.html')


@app.route('/capture', methods=['GET', 'POST'])
def capture_web():
    if flask_login.current_user.is_authenticated:
        user = flask_login.current_user.get_id()
    else:
        user = src_request_ip(request)

    if request.method == 'POST' and request.form.get('url'):
        capture_query: Dict[str, Union[str, bytes, int, bool]] = {'url': request.form['url']}
        # check if the post request has the file part
        if 'cookies' in request.files and request.files['cookies'].filename:
            capture_query['cookies'] = request.files['cookies'].stream.read()

        if request.form.get('personal_ua') and request.headers.get('User-Agent'):
            capture_query['user_agent'] = request.headers['User-Agent']
        else:
            capture_query['user_agent'] = request.form['user_agent']
            capture_query['os'] = request.form['os']
            capture_query['browser'] = request.form['browser']

        capture_query['depth'] = request.form['depth'] if request.form.get('depth') else 1

        capture_query['listing'] = True if request.form.get('listing') else False

        if request.form.get('referer'):
            capture_query['referer'] = request.form['referer']

        if request.form.get('proxy'):
            parsed_proxy = urlparse(request.form['proxy'])
            if parsed_proxy.scheme and parsed_proxy.hostname and parsed_proxy.port:
                if parsed_proxy.scheme in ['http', 'https', 'socks5']:
                    if (parsed_proxy.username and parsed_proxy.password) != (not parsed_proxy.username and not parsed_proxy.password):
                        capture_query['proxy'] = request.form['proxy']
                    else:
                        flash('You need to enter a username AND a password for your proxy.', 'error')
                else:
                    flash('Proxy scheme not supported: must be http(s) or socks5.', 'error')
            else:
                flash('Invalid proxy: Check that you entered a scheme, a hostname and a port.', 'error')

        perma_uuid = lookyloo.enqueue_capture(capture_query, source='web', user=user, authenticated=flask_login.current_user.is_authenticated)
        time.sleep(30)
        return redirect(url_for('tree', tree_uuid=perma_uuid))
    elif request.method == 'GET' and request.args.get('url'):
        url = unquote_plus(request.args['url']).strip()
        capture_query = {'url': url}
        perma_uuid = lookyloo.enqueue_capture(capture_query, source='web', user=user, authenticated=flask_login.current_user.is_authenticated)
        return redirect(url_for('tree', tree_uuid=perma_uuid))

    user_agents: Dict[str, Any] = {}
    if use_own_ua:
        user_agents = get_user_agents('own_user_agents')
    if not user_agents:
        user_agents = get_user_agents()
    # get most frequest UA that isn't a bot (yes, it is dirty.)
    for ua in user_agents.pop('by_frequency'):
        if 'bot' not in ua['useragent'].lower():
            default_ua = ua
            break
    splash_up, message = splash_status()
    if not splash_up:
        flash(f'The capture module is not reachable ({message}).', 'error')
        flash('The request will be enqueued, but capturing may take a while and require the administrator to wake up.', 'error')
    return render_template('capture.html', user_agents=user_agents, default=default_ua,
                           max_depth=max_depth, personal_ua=request.headers.get('User-Agent'))


@app.route('/cookies/<string:cookie_name>', methods=['GET'])
def cookies_name_detail(cookie_name: str):
    captures, domains = lookyloo.get_cookie_name_investigator(cookie_name.strip())
    return render_template('cookie_name.html', cookie_name=cookie_name, domains=domains, captures=captures)


@app.route('/body_hashes/<string:body_hash>', methods=['GET'])
def body_hash_details(body_hash: str):
    from_popup = True if (request.args.get('from_popup') and request.args.get('from_popup') == 'True') else False
    captures, domains = lookyloo.get_body_hash_investigator(body_hash.strip())
    return render_template('body_hash.html', body_hash=body_hash, domains=domains, captures=captures, from_popup=from_popup)


@app.route('/urls/<string:url>', methods=['GET'])
def url_details(url: str):
    url = unquote_plus(url).strip()
    hits = lookyloo.get_url_occurrences(url, limit=50)
    return render_template('url.html', url=url, hits=hits)


@app.route('/hostnames/<string:hostname>', methods=['GET'])
def hostname_details(hostname: str):
    hits = lookyloo.get_hostname_occurrences(hostname.strip(), with_urls_occurrences=True, limit=50)
    return render_template('hostname.html', hostname=hostname, hits=hits)


@app.route('/stats', methods=['GET'])
def statsfull():
    stats = lookyloo.get_stats()
    return render_template('stats.html', stats=stats)


@app.route('/whois/<string:query>', methods=['GET'])
def whois(query: str):
    to_return = lookyloo.uwhois.whois(query)
    return send_file(BytesIO(to_return.encode()),
                     mimetype='test/plain', as_attachment=True, attachment_filename=f'whois.{query}.txt')


# ##### Methods related to a specific URLNode #####

@app.route('/tree/<string:tree_uuid>/url/<string:node_uuid>/request_cookies', methods=['GET'])
def urlnode_request_cookies(tree_uuid: str, node_uuid: str):
    urlnode = lookyloo.get_urlnode_from_tree(tree_uuid, node_uuid)
    if not urlnode.request_cookie:
        return

    return send_file(BytesIO(json.dumps(urlnode.request_cookie, indent=2).encode()),
                     mimetype='text/plain', as_attachment=True, attachment_filename='request_cookies.txt')


@app.route('/tree/<string:tree_uuid>/url/<string:node_uuid>/response_cookies', methods=['GET'])
def urlnode_response_cookies(tree_uuid: str, node_uuid: str):
    urlnode = lookyloo.get_urlnode_from_tree(tree_uuid, node_uuid)
    if not urlnode.response_cookie:
        return

    return send_file(BytesIO(json.dumps(urlnode.response_cookie, indent=2).encode()),
                     mimetype='text/plain', as_attachment=True, attachment_filename='response_cookies.txt')


@app.route('/tree/<string:tree_uuid>/url/<string:node_uuid>/urls_in_rendered_content', methods=['GET'])
def urlnode_urls_in_rendered_content(tree_uuid: str, node_uuid: str):
    # Note: we could simplify it with lookyloo.get_urls_rendered_page, but if at somepoint,
    # we have multiple page rendered on one tree, it will be a problem.
    ct = lookyloo.get_crawled_tree(tree_uuid)
    urlnode = ct.root_hartree.get_url_node_by_uuid(node_uuid)
    if not urlnode.rendered_html:
        return

    not_loaded_urls = sorted(set(urlnode.urls_in_rendered_page)
                             - set(ct.root_hartree.all_url_requests.keys()))
    to_return = StringIO()
    to_return.writelines([f'{u}\n' for u in not_loaded_urls])
    return send_file(BytesIO(to_return.getvalue().encode()), mimetype='text/plain',
                     as_attachment=True, attachment_filename='urls_in_rendered_content.txt')


@app.route('/tree/<string:tree_uuid>/url/<string:node_uuid>/rendered_content', methods=['GET'])
def urlnode_rendered_content(tree_uuid: str, node_uuid: str):
    urlnode = lookyloo.get_urlnode_from_tree(tree_uuid, node_uuid)
    if not urlnode.rendered_html:
        return
    return send_file(BytesIO(urlnode.rendered_html.getvalue()), mimetype='text/plain',
                     as_attachment=True, attachment_filename='rendered_content.txt')


@app.route('/tree/<string:tree_uuid>/url/<string:node_uuid>/posted_data', methods=['GET'])
def urlnode_post_request(tree_uuid: str, node_uuid: str):
    urlnode = lookyloo.get_urlnode_from_tree(tree_uuid, node_uuid)
    if not urlnode.posted_data:
        return
    posted: Union[str, bytes]
    if isinstance(urlnode.posted_data, (dict, list)):
        # JSON blob, pretty print.
        posted = json.dumps(urlnode.posted_data, indent=2)
    else:
        posted = urlnode.posted_data

    if isinstance(posted, str):
        to_return = BytesIO(posted.encode())
        is_blob = False
    else:
        to_return = BytesIO(posted)
        is_blob = True
    to_return.seek(0)

    if is_blob:
        return send_file(to_return, mimetype='application/octet-stream',
                         as_attachment=True, attachment_filename='posted_data.bin')
    else:
        return send_file(to_return, mimetype='text/plain',
                         as_attachment=True, attachment_filename='posted_data.txt')


@app.route('/tree/<string:tree_uuid>/url/<string:node_uuid>/ressource', methods=['POST', 'GET'])
def get_ressource(tree_uuid: str, node_uuid: str):
    if request.method == 'POST':
        h_request = request.form.get('ressource_hash')
    else:
        h_request = None
    ressource = lookyloo.get_ressource(tree_uuid, node_uuid, h_request)
    if ressource:
        filename, to_return, mimetype = ressource
        if not mimetype.startswith('image'):
            # Force a .txt extension
            filename += '.txt'
    else:
        to_return = BytesIO(b'Unknown Hash')
        filename = 'file.txt'
        mimetype = 'text/text'
    to_return.seek(0)
    return send_file(to_return, mimetype=mimetype, as_attachment=True, attachment_filename=filename)


@app.route('/tree/<string:tree_uuid>/url/<string:node_uuid>/ressource_preview', methods=['GET'])
@app.route('/tree/<string:tree_uuid>/url/<string:node_uuid>/ressource_preview/<string:h_ressource>', methods=['GET'])
def get_ressource_preview(tree_uuid: str, node_uuid: str, h_ressource: Optional[str]=None):
    ressource = lookyloo.get_ressource(tree_uuid, node_uuid, h_ressource)
    if not ressource:
        return Response('No preview available.', mimetype='text/text')
    filename, r, mimetype = ressource
    if mimetype.startswith('image'):
        return send_file(r, mimetype=mimetype,
                         as_attachment=True, attachment_filename=filename)
    return Response('No preview available.', mimetype='text/text')


@app.route('/tree/<string:tree_uuid>/url/<string:node_uuid>/hashes', methods=['GET'])
def hashes_urlnode(tree_uuid: str, node_uuid: str):
    hashes = lookyloo.get_hashes(tree_uuid, urlnode_uuid=node_uuid)
    return send_file(BytesIO('\n'.join(hashes).encode()),
                     mimetype='test/plain', as_attachment=True, attachment_filename='hashes.txt')


@app.route('/tree/<string:tree_uuid>/url/<string:node_uuid>/add_context', methods=['POST'])
@flask_login.login_required
def add_context(tree_uuid: str, node_uuid: str):
    if not enable_context_by_users:
        return redirect(url_for('ressources'))

    context_data = request.form
    ressource_hash: str = context_data['hash_to_contextualize']
    hostnode_uuid: str = context_data['hostnode_uuid']
    callback_str: str = context_data['callback_str']
    legitimate: bool = True if context_data.get('legitimate') else False
    malicious: bool = True if context_data.get('malicious') else False
    details: Dict[str, Dict] = {'malicious': {}, 'legitimate': {}}
    if malicious:
        malicious_details = {}
        if context_data.get('malicious_type'):
            malicious_details['type'] = context_data['malicious_type']
        if context_data.get('malicious_target'):
            malicious_details['target'] = context_data['malicious_target']
        details['malicious'] = malicious_details
    if legitimate:
        legitimate_details = {}
        if context_data.get('legitimate_domain'):
            legitimate_details['domain'] = context_data['legitimate_domain']
        if context_data.get('legitimate_description'):
            legitimate_details['description'] = context_data['legitimate_description']
        details['legitimate'] = legitimate_details
    lookyloo.add_context(tree_uuid, urlnode_uuid=node_uuid, ressource_hash=ressource_hash,
                         legitimate=legitimate, malicious=malicious, details=details)
    if callback_str == 'hostnode_popup':
        return redirect(url_for('hostnode_popup', tree_uuid=tree_uuid, node_uuid=hostnode_uuid))
    elif callback_str == 'ressources':
        return redirect(url_for('ressources'))


# Query API
authorizations = {
    'apikey': {
        'type': 'apiKey',
        'in': 'header',
        'name': 'Authorization'
    }
}


api = Api(app, title='Lookyloo API',
          description='API to submit captures and query a lookyloo instance.',
          doc='/doc/',
          authorizations=authorizations,
          version=pkg_resources.get_distribution('lookyloo').version)

api.add_namespace(generic_api)