#!/usr/bin/env -S python -u
import argparse
import os
import glob
import subprocess
import json
import re
import requests
import unicodedata
import sys
from querysubsonic import findalbumbyname

# 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):
    # Returns the metadata from an aax file
    ret = subprocess.run(["ffprobe", "-v", "info", "-hide_banner", "-show_format", "-show_chapters",
                          "-print_format", "json", os.path.abspath(aaxfile)], capture_output=True)

    mdata = json.loads(ret.stdout)
    aret = ret.stderr.decode().split('\n')[0]
    mdata["checksum"] = aret.split()[-1]
    return mdata


def getmetabitrate():
    # Return the bitrate of the media
    bit_rate = metadata['format']['bit_rate']
    return bit_rate[:2]


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


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


def normalize_data(data):
    # Return a normalized title
    data = data.replace(" ", "_")
    pattern = re.compile('\W')
    return re.sub(pattern, '', data)


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.run(command, shell=True, capture_output=True)
        # while True:
        #     output = process.stdout.readline()
        #     if output == '' and process.poll() is not None:
        #         break
        #     if output:
        #         print(output.strip())
        rc = process.stdout
        return rc
    else:
        process = subprocess.run(command, shell=True)
    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.replace(' ', '_'))
    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.run(command, shell=True, capture_output=True)
        # 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.run(command, shell=True)
    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)
        subprocess.run(command, shell=True)
    return


def getcorrectkey():
    # request the key for the checksum
    try:
        r = requests.post('http://prod-faas-gw.darkurthe.net:8080/function/checkkey', metadata['checksum'], verify=False, timeout=None)
        return r.text.strip()
    except requests.exceptions.HTTPError as err:
        raise err
        return None


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 not findalbumbyname(album):
            artist = normalize_data(getmetadatatags('artist'))
            title = normalize_data(getmetadatatags('title'))
            act_byte = getcorrectkey()
            if act_byte is None:
                sys.exit("Can't continue with this file {rfile}")
            else:
                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)
        else:
            print('We have that book already')