#!/usr/bin/env python
import argparse
import os
import glob
import subprocess
import shlex
import json
import requests
import unicodedata
from querysubsonic import findalbumbyname
from time import sleep


# arguments
# activation_key, file name, codec(default to mp3)

parser = argparse.ArgumentParser()
parser.add_argument("-s","--single", help="Use this option to create a single file. This is false by default", action="store_true")
parser.add_argument("-d","--dpath", help="Use this to set the destination path. Otherwise I will use the current directory")
parser.add_argument("-v", "--verbose", help="Send output to stdout", action="store_true")
parser.add_argument("filename", help="Filename to convert, or directory to look in")

args = parser.parse_args()

act_byte = ""
metadata = ""
mode = ""
stats = ""

if args.dpath:
    path = args.dpath
else:
    path = os.getcwd()

if args.single:
    mode = 'single'
else:
    mode = 'chapter'

if args.verbose:
    stats = "-stats"
else:
    stats = "-nostats"


def getmetadata(aaxfile):
    ret = subprocess.check_output(["ffprobe", "-v", "info", "-hide_banner", "-show_format", "-show_chapters", "-print_format", "json", os.path.abspath(aaxfile)])
    mdata = json.loads(ret)
    return mdata


def getmetabitrate():
    bit_rate = metadata['format']['bit_rate']
    return bit_rate[:2]

def getmetacopyright():
    copyright = unicodedata.normalize('NFKD', metadata['format']['tags']['copyright']).encode('ascii','ignore')
    return copyright


def getmetadatatags(key):
# get specific data
    tag = metadata['format']['tags'][key]
    return tag


def reencode(aaxfile, outpath):
# decrypt and reencode to mp3
    command = ("ffmpeg -loglevel error {} -activation_bytes {} -i {} -vn -codec:a libmp3lame -ab {}k -map_metadata -1 "
               "-metadata \"title={}\" -metadata 'artist={}' -metadata 'album_artist={}' -metadata \"album={}\" -metadata 'date={}' "
               "-metadata track=1/1 -metadata 'genre={}' -metadata 'copyright={}' \"{}\" " ).format(stats, act_byte,aaxfile,getmetabitrate(),
                                                                                           getmetadatatags('title'), getmetadatatags('artist'),
                                                                                           getmetadatatags('album_artist'), getmetadatatags('album'),
                                                                                           getmetadatatags('date'), getmetadatatags('genre'),
                                                                                           getmetacopyright(),outpath)
    if args.verbose:
        print(command)
        process = subprocess.Popen(shlex.split(command), stdout=subprocess.PIPE)
        while True:
            output = process.stdout.readline()
            if output == '' and process.poll() is not None:
                break
            if output:
                print(output.strip())
        rc = process.poll()
        return rc
    else:
        process = subprocess.call(shlex.split(command))
    return 


def getchaptercount():
# Get the number of chapters
    ccount = metadata['chapters']
    return len(ccount)


def getchaptermetadata(cid, key):
# get the Chapter metadata
    for i in metadata['chapters']:
        if i['id'] == cid:
            return i[key]

def movetochapters(path, outpath, chapter, title, start,end):
# Creating individual chapters

    outfile = "{}/Ch - {} {}.mp3".format(outpath, chapter, title)
    command = "ffmpeg -loglevel error {} -i \"{}\" -ss {} -to {} -codec:a copy -metadata 'track={}' \"{}\"".format(stats, path,
                                                                                                               start, end,
                                                                                                               chapter, outfile)
    if args.verbose:
        print(command)
        process = subprocess.Popen(shlex.split(command), stdout=subprocess.PIPE)
        while True:
            output = process.stdout.readline()
            if output == '' and process.poll() is not None:
                break
            if output:
                print(output.strip())
        rc = process.poll()
        return rc
    else:
        process = subprocess.call(shlex.split(command))
    return


def getcoverart(path,outpath):
# Pull the coverart from the file
    command = "ffmpeg -loglevel error -activation_bytes {} -i \"{}\" -an -codec:v copy \"{}/cover.jpg\"".format(act_byte,
                                                                                                               path, outpath)
    if args.verbose:
        print(command)
    process = subprocess.call(shlex.split(command))
    return

def filechecksum(aaxfile):
    ret = subprocess.Popen(["ffprobe", "-v", "info", "-hide_banner", os.path.abspath(aaxfile)], stderr=subprocess.PIPE)
    grep = subprocess.Popen(["grep", "checksum"], stdin=ret.stderr, stdout=subprocess.PIPE)
    awk = subprocess.Popen(["awk", " { print $8 } "], stdin=grep.stdout, stdout=subprocess.PIPE)
    hashsum,out = awk.communicate()
    hashsum = hashsum.strip('\n')
    return hashsum

def getcorrectkey(aaxfile):
    hex = filechecksum(aaxfile)
    payload = hex
    recovery = 3
    while recovery != 0:
      r = requests.post('http://x86-docker01:8080/function/checkkey', payload, verify=False, timeout=None)
      if r.status_code == 200:
          key = r.text
          recovery = 0
          return key
      else: 
          print('Checkkey function is down please wait')
          recovery = recovery - 1
          sleep(5)

for rfile in glob.glob(args.filename):
    if rfile.find("aax") != -1 and os.path.isfile(rfile):
        metadata = getmetadata(rfile)
        album = getmetadatatags('album')
        #See if we got it already
        if (findalbumbyname(album) == False):
            artist = getmetadatatags('artist')
            title = getmetadatatags('title')
            act_byte = getcorrectkey(rfile)
            ddir = "%s/%s/%s" % (path, artist, title)
            single_file_path = "/processing/%s.mp3" % (title)
            if not os.path.exists(ddir):
                os.makedirs(ddir)
            print(ddir)
            reencode(rfile, single_file_path)
            if mode == 'chapter':
                chapter = 0
                numchapters = getchaptercount()
                while (numchapters > 0 ):
                    cstart = getchaptermetadata(chapter, 'start_time')
                    cend = getchaptermetadata(chapter, 'end_time')
                    chapter += 1
                    numchapters -= 1
                    schap = str(chapter).zfill(2)
                    movetochapters(single_file_path, ddir, schap, title, cstart,cend)
                os.remove(single_file_path)
            getcoverart(rfile, ddir)