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

'''
    Flask functions and routes for the trending modules page
'''
import redis
import os
import datetime
import json
from Date import Date
import requests
from flask import Flask, render_template, jsonify, request, Blueprint, redirect, url_for

# ============ VARIABLES ============
import Flask_config

app = Flask_config.app
cfg = Flask_config.cfg
r_serv_metadata = Flask_config.r_serv_metadata
vt_enabled = Flask_config.vt_enabled
vt_auth = Flask_config.vt_auth

base64Decoded = Blueprint('base64Decoded', __name__, template_folder='templates')

# ============ FUNCTIONS ============

def get_date_range(num_day):
    curr_date = datetime.date.today()
    date = Date(str(curr_date.year)+str(curr_date.month).zfill(2)+str(curr_date.day).zfill(2))
    date_list = []

    for i in range(0, num_day+1):
        date_list.append(date.substract_day(i))

    return list(reversed(date_list))

def substract_date(date_from, date_to):
    date_from = datetime.date(int(date_from[0:4]), int(date_from[4:6]), int(date_from[6:8]))
    date_to = datetime.date(int(date_to[0:4]), int(date_to[4:6]), int(date_to[6:8]))
    delta = date_to - date_from # timedelta
    l_date = []
    for i in range(delta.days + 1):
        date = date_from + datetime.timedelta(i)
        l_date.append( date.strftime('%Y%m%d') )
    return l_date

def list_sparkline_values(date_range_sparkline, hash):
    sparklines_value = []
    for date_day in date_range_sparkline:
        nb_seen_this_day = r_serv_metadata.zscore('base64_date:'+date_day, hash)
        if nb_seen_this_day is None:
            nb_seen_this_day = 0
        sparklines_value.append(int(nb_seen_this_day))
    return sparklines_value

def get_file_icon(estimated_type):
    file_type = estimated_type.split('/')[0]
    # set file icon
    if file_type == 'application':
        file_icon = 'fa-file-o '
    elif file_type == 'audio':
        file_icon = 'fa-file-video-o '
    elif file_type == 'image':
        file_icon = 'fa-file-image-o'
    elif file_type == 'text':
        file_icon = 'fa-file-text-o'
    else:
        file_icon =  'fa-file'

    return file_icon

def get_file_icon_text(estimated_type):
    file_type = estimated_type.split('/')[0]
    # set file icon
    if file_type == 'application':
        file_icon_text = '\uf15b'
    elif file_type == 'audio':
        file_icon_text = '\uf1c7'
    elif file_type == 'image':
        file_icon_text = '\uf03e'
    elif file_type == 'text':
        file_icon_text = '\uf15c'
    else:
        file_icon_text = '\uf15b'

    return file_icon_text

def one():
    return 1

# ============= ROUTES ==============
@base64Decoded.route("/base64Decoded/all_base64_search", methods=['POST'])
def all_base64_search():
    date_from = request.form.get('date_from')
    date_to = request.form.get('date_to')
    type = request.form.get('type')
    print(type)
    return redirect(url_for('base64Decoded.base64Decoded_page', date_from=date_from, date_to=date_to, type=type))

@base64Decoded.route("/base64Decoded/", methods=['GET'])
def base64Decoded_page():
    date_from = request.args.get('date_from')
    date_to = request.args.get('date_to')
    type = request.args.get('type')

    if type == 'All types':
        type = None

    #date_from = '20180628' or date_from = '2018-06-28'
    #date_to = '20180628' or date_to = '2018-06-28'

    if type is not None:
        #retrieve + char
        type = type.replace(' ', '+')
        if type not in r_serv_metadata.smembers('hash_all_type'):
            type = None

    date_range = []
    if date_from is not None and date_to is not None:
        #change format
        try:
            if len(date_from) != 8:
                date_from = date_from[0:4] + date_from[5:7] + date_from[8:10]
                date_to = date_to[0:4] + date_to[5:7] + date_to[8:10]
            date_range = substract_date(date_from, date_to)
        except:
            pass

    if not date_range:
        date_range.append(datetime.date.today().strftime("%Y%m%d"))
        date_from = date_range[0][0:4] + '-' + date_range[0][4:6] + '-' + date_range[0][6:8]
        date_to = date_from

    else:
        date_from = date_from[0:4] + '-' + date_from[4:6] + '-' + date_from[6:8]
        date_to = date_to[0:4] + '-' + date_to[4:6] + '-' + date_to[6:8]

    # display day type bar chart
    if len(date_range) == 1 and type is None:
        daily_type_chart = True
        daily_date = date_range[0]
    else:
        daily_type_chart = False
        daily_date = None

    l_64 = set()
    for date in date_range:
        l_hash = r_serv_metadata.zrange('base64_date:' +date, 0, -1)
        if l_hash:
            for hash in l_hash:
                l_64.add(hash)

    num_day_sparkline = 6
    date_range_sparkline = get_date_range(num_day_sparkline)

    b64_metadata = []
    l_64 = list(l_64)
    for hash in l_64:
        # select requested base 64 type
        estimated_type = r_serv_metadata.hget('metadata_hash:'+hash, 'estimated_type')
        if type is not None:
            if estimated_type is not None:
                if estimated_type != type:
                    continue

        first_seen = r_serv_metadata.hget('metadata_hash:'+hash, 'first_seen')
        last_seen = r_serv_metadata.hget('metadata_hash:'+hash, 'last_seen')
        nb_seen_in_paste = r_serv_metadata.hget('metadata_hash:'+hash, 'nb_seen_in_all_pastes')
        size = r_serv_metadata.hget('metadata_hash:'+hash, 'size')

        if hash is not None and first_seen is not None and \
                                last_seen is not None and \
                                nb_seen_in_paste is not None and \
                                size is not None:

            file_icon = get_file_icon(estimated_type)

            if r_serv_metadata.hexists('metadata_hash:'+hash, 'vt_link'):
                b64_vt = True
                b64_vt_link = r_serv_metadata.hget('metadata_hash:'+hash, 'vt_link')
            else:
                b64_vt = False
                b64_vt_link = ''

            sparklines_value = list_sparkline_values(date_range_sparkline, hash)

            b64_metadata.append( (file_icon, estimated_type, hash, nb_seen_in_paste, size, first_seen, last_seen, b64_vt, b64_vt_link, sparklines_value) )

    l_type = r_serv_metadata.smembers('hash_all_type')

    return render_template("base64Decoded.html", l_64=b64_metadata, vt_enabled=vt_enabled, l_type=l_type, type=type, daily_type_chart=daily_type_chart, daily_date=daily_date,
                                                date_from=date_from, date_to=date_to)

@base64Decoded.route('/base64Decoded/hash_by_type')
def hash_by_type():
    type = request.args.get('type')
    type = 'text/plain'
    return render_template('base64_type.html',type = type)

@base64Decoded.route('/base64Decoded/base64_hash')
def base64_hash():
    hash = request.args.get('hash')
    return render_template('base64_hash.html')

@base64Decoded.route('/base64Decoded/showHash')
def showHash():
    hash = request.args.get('hash')
    #hash = 'e02055d3efaad5d656345f6a8b1b6be4fe8cb5ea'

    # TODO FIXME show error
    if hash is None:
        return base64Decoded_page()

    estimated_type = r_serv_metadata.hget('metadata_hash:'+hash, 'estimated_type')
    # hash not found
    # TODO FIXME show error
    if estimated_type is None:
        return base64Decoded_page()

    else:
        file_icon = get_file_icon(estimated_type)
        size = r_serv_metadata.hget('metadata_hash:'+hash, 'size')
        first_seen = r_serv_metadata.hget('metadata_hash:'+hash, 'first_seen')
        last_seen = r_serv_metadata.hget('metadata_hash:'+hash, 'last_seen')
        nb_seen_in_all_pastes = r_serv_metadata.hget('metadata_hash:'+hash, 'nb_seen_in_all_pastes')

        num_day_type = 6
        date_range_sparkline = get_date_range(num_day_type)
        sparkline_values = list_sparkline_values(date_range_sparkline, hash)

        print(sparkline_values)

        return render_template('showHash.html', hash=hash, size=size, estimated_type=estimated_type, file_icon=file_icon,
                                first_seen=first_seen,
                                last_seen=last_seen, nb_seen_in_all_pastes=nb_seen_in_all_pastes, sparkline_values=sparkline_values)

@base64Decoded.route('/base64Decoded/hash_by_type_json')
def hash_by_type_json():
    type = request.args.get('type')

    #retrieve + char
    type = type.replace(' ', '+')

    num_day_type = 30
    date_range_sparkline = get_date_range(num_day_type)

    #verify input
    if type in r_serv_metadata.smembers('hash_all_type'):
        type_value = []
        for date in date_range_sparkline:
            num_day_type = r_serv_metadata.zscore('base64_type:'+type, date)
            if num_day_type is None:
                num_day_type = 0
            date = date[0:4] + '-' + date[4:6] + '-' + date[6:8]
            type_value.append({ 'date' : date, 'value' : int( num_day_type )})

        return jsonify(type_value)
    else:
        return jsonify()

@base64Decoded.route('/base64Decoded/daily_type_json')
def daily_type_json():
    date = request.args.get('date')

    daily_type = set()
    l_b64 = r_serv_metadata.zrange('base64_date:' +date, 0, -1)
    for hash in l_b64:
        estimated_type = r_serv_metadata.hget('metadata_hash:'+hash, 'estimated_type')
        if estimated_type is not None:
            daily_type.add(estimated_type)

    type_value = []
    for day_type in daily_type:
        num_day_type = r_serv_metadata.zscore('base64_type:'+day_type, date)
        type_value.append({ 'date' : day_type, 'value' : int( num_day_type )})

    return jsonify(type_value)

@base64Decoded.route('/base64Decoded/range_type_json')
def range_type_json():
    date_from = request.args.get('date_from')
    date_to = request.args.get('date_to')

    date_range = []
    if date_from is not None and date_to is not None:
        #change format
        if len(date_from) != 8:
            date_from = date_from[0:4] + date_from[5:7] + date_from[8:10]
            date_to = date_to[0:4] + date_to[5:7] + date_to[8:10]
        date_range = substract_date(date_from, date_to)

    if not date_range:
        date_range.append(datetime.date.today().strftime("%Y%m%d"))

    all_type = set()
    for date in date_range:
        l_hash = r_serv_metadata.zrange('base64_date:' +date, 0, -1)
        if l_hash:
            for hash in l_hash:
                estimated_type = r_serv_metadata.hget('metadata_hash:'+hash, 'estimated_type')
                all_type.add(estimated_type)

    range_type = []
    for date in date_range:
        day_type = {}
        day_type['date']= date[0:4] + '-' + date[4:6] + '-' + date[6:8]
        for type in all_type:
            num_day_type = r_serv_metadata.zscore('base64_type:'+type, date)
            if num_day_type is None:
                num_day_type = 0
            day_type[type]= num_day_type
        range_type.append(day_type)

    return jsonify(range_type)

@base64Decoded.route('/base64Decoded/hash_graph_node_json')
def hash_graph_node_json():
    hash = request.args.get('hash')

    estimated_type = r_serv_metadata.hget('metadata_hash:'+hash, 'estimated_type')

    if hash is not None and estimated_type is not None:

        nodes_set_hash = set()
        nodes_set_paste = set()
        links_set = set()

        url = hash
        first_seen = r_serv_metadata.hget('metadata_hash:'+hash, 'first_seen')
        last_seen = r_serv_metadata.hget('metadata_hash:'+hash, 'last_seen')
        nb_seen_in_paste = r_serv_metadata.hget('metadata_hash:'+hash, 'nb_seen_in_all_pastes')
        size = r_serv_metadata.hget('metadata_hash:'+hash, 'size')

        nodes_set_hash.add((hash, 1, first_seen, last_seen, estimated_type, nb_seen_in_paste, size, url))

        #get related paste
        l_pastes = r_serv_metadata.zrange('base64_hash:'+hash, 0, -1)
        for paste in l_pastes:
            url = paste
            #nb_seen_in_this_paste = nb_in_file = int(r_serv_metadata.zscore('base64_hash:'+hash, paste))
            nb_base64_in_paste = r_serv_metadata.scard('base64_paste:'+paste)

            nodes_set_paste.add((paste, 2,nb_base64_in_paste,url))
            links_set.add((hash, paste))

            l_hash = r_serv_metadata.smembers('base64_paste:'+paste)
            for child_hash in l_hash:
                if child_hash != hash:
                    url = child_hash
                    first_seen = r_serv_metadata.hget('metadata_hash:'+child_hash, 'first_seen')
                    last_seen = r_serv_metadata.hget('metadata_hash:'+child_hash, 'last_seen')
                    nb_seen_in_paste = r_serv_metadata.hget('metadata_hash:'+child_hash, 'nb_seen_in_all_pastes')
                    size = r_serv_metadata.hget('metadata_hash:'+child_hash, 'size')
                    estimated_type = r_serv_metadata.hget('metadata_hash:'+child_hash, 'estimated_type')

                    nodes_set_hash.add((child_hash, 1, first_seen, last_seen, estimated_type, nb_seen_in_paste, size, url))
                    links_set.add((child_hash, paste))

                    #l_pastes_child = r_serv_metadata.zrange('base64_hash:'+child_hash, 0, -1)
                    #for child_paste in l_pastes_child:

        nodes = []
        for node in nodes_set_hash:
            nodes.append({"id": node[0], "group": node[1], "first_seen": node[2], "last_seen": node[3], 'estimated_type': node[4], "nb_seen_in_paste": node[5], "size": node[6], 'icon': get_file_icon_text(node[4]),"url": url_for('base64Decoded.showHash', hash=node[7]), 'hash': True})
        for node in nodes_set_paste:
            nodes.append({"id": node[0], "group": node[1], "nb_seen_in_paste": node[2],"url": url_for('showsavedpastes.showsavedpaste', paste=node[3]), 'hash': False})
        links = []
        for link in links_set:
            links.append({"source": link[0], "target": link[1]})
        json = {"nodes": nodes, "links": links}
        return jsonify(json)

    else:
        return jsonify({})

@base64Decoded.route('/base64Decoded/base64_types')
def base64_types():
    date_from = 20180701
    date_to = 20180706
    return render_template('base64_types.html', date_from=date_from, date_to=date_to)

@base64Decoded.route('/base64Decoded/send_file_to_vt', methods=['POST'])
def send_file_to_vt():
    paste = request.form['paste']
    hash = request.form['hash']

    b64_path = r_serv_metadata.hget('metadata_hash:'+hash, 'saved_path')
    b64_full_path = os.path.join(os.environ['AIL_HOME'], b64_path)
    b64_content = ''
    with open(b64_full_path, 'rb') as f:
        b64_content = f.read()

    files = {'file': (hash, b64_content)}
    response = requests.post('https://www.virustotal.com/vtapi/v2/file/scan', files=files, params= {'apikey': vt_auth})
    json_response = response.json()
    print(json_response)

    vt_b64_link = json_response['permalink'].split('analysis')[0] + 'analysis/'
    r_serv_metadata.hset('metadata_hash:'+hash, 'vt_link', vt_b64_link)
    b64_vt_report = r_serv_metadata.hget('metadata_hash:'+hash, 'vt_report', '')

    return redirect(url_for('showsavedpastes.showsavedpaste', paste=paste))

@base64Decoded.route('/base64Decoded/update_vt_result')
def update_vt_result():
    hash = request.args.get('hash')

    params = {'apikey': vt_auth, 'resource': hash}
    response = requests.get('https://www.virustotal.com/vtapi/v2/file/report',params=params)
    if response.status_code == 200:
        json_response = response.json()
        response_code = json_response['response_code']
        # report exist
        if response_code == 1:
            total = json_response['total']
            positive = json_response['positives']

            b64_vt_report = 'Detection {}/{}'.format(positive,total)
        # no report found
        elif response_code == 0:
            b64_vt_report = 'No report found'
            pass
        # file in queue
        elif response_code == -2:
            b64_vt_report = 'File in queue'
            pass

        r_serv_metadata.hset('metadata_hash:'+hash, 'vt_report', b64_vt_report)
        return jsonify(hash=hash, report_vt=b64_vt_report)
    elif response.status_code == 403:
        Flask_config.vt_enabled = False
        print('VT is disabled')
        return jsonify()
    else:
        # TODO FIXME make json response
        return jsonify()

# ========= REGISTRATION =========
app.register_blueprint(base64Decoded)