#!/usr/bin/env python3
#
# download deleted vids from old yt channels
# script by paper
# it's pretty old and could definitely use some refining

from __future__ import print_function
import argparse
import internetarchive
try:
    import orjson as json
except ImportError:
    import json
import os
import re
import time
try:
    import urllib.request as compat_urllib
    from urllib.error import HTTPError
except ImportError:  # Python 2
    import urllib as compat_urllib
    from urllib2 import HTTPError
try:
    import yt_dlp as youtube_dl
    from yt_dlp.utils import sanitize_filename
except ImportError:
    try:
        import youtube_dl
        from youtube_dl.utils import sanitize_filename
    except ImportError:
        print("ERROR: youtube-dl/yt-dlp not installed!")
        exit(1)
from io import open  # for Python 2 compatibility, in Python 3 this
                     # just maps to the built-in function

class MyLogger(object):
    def debug(self, msg):
        pass

    def warning(self, msg):
        pass

    def error(self, msg):
        pass

def ytdl_hook(d):
    if d["status"] == "finished":
        print(" downloaded %s:    100% " % (os.path.basename(d["filename"])))
    if d["status"] == "downloading":
        print(" downloading %s: %s\r" % (os.path.basename(d["filename"]), d["_percent_str"]), end="")
    if d["status"] == "error":
        print(" an error occurred downloading {0}!")

def load_split_files(path):
    if os.path.isdir(path):
        result = {"videos": []}
        for fi in os.listdir(path):
            for f in re.findall(r"vids.+?\.json", fi):
                with open(path + "/" + f, "r", encoding="utf-8") as infile:
                    for i in json.loads(infile.read())["videos"]:
                        result["videos"].append(i)
        return result
    else:
        return json.loads(open(path, "r", encoding="utf-8").read())

def reporthook(count, block_size, total_size):
    global start_time
    if count == 0:
        start_time = time.time()
        return
    duration = time.time() - start_time
    percent = int(count * block_size * 100 / total_size)
    print(" downloading %d%%        \r" % (percent), end="")


parser = argparse.ArgumentParser(description="Downloads (deleted) videos from YTPMV creators")
parser.add_argument("-c", "--channel", help="channel URL", metavar="<url>", required=True)
parser.add_argument("-d", "--database", help="json database (https://finnrepo.a2hosted.com/YTPMV_Database)", metavar="<path>", required=True)
parser.add_argument("-o", "--output", help="output directory, defaults to the channel ID", metavar="<output>")
args = parser.parse_args()

if args.channel[:8] == "https://" or args.channel[:7] == "http://":
    channel = args.channel.split("/")[-1]
else:
    channel = args.channel

if args.output:
    output = args.output
else:
    output = channel

if not os.path.exists(output):
    os.mkdir(output)

ytdl_opts = {
    "outtmpl": output + "/%(title)s-%(id)s.%(ext)s",
    "retries": 100,
    "nooverwrites": True,
    "call_home": False,
    "quiet": True,
    "writeinfojson": True,
    "writedescription": True,
    "writethumbnail": True,
    "writeannotations": True,
    "writesubtitles": True,
    "allsubtitles": True,
    "ignoreerrors": True,
    "addmetadata": True,
    "continuedl": True,
    "embedthumbnail": True,
    "format": "bestvideo+bestaudio/best",
    "restrictfilenames": True,
    "no_warnings": True,
    "progress_hooks": [ytdl_hook],
    "logger": MyLogger(),
    "ignoreerrors": False,
}

for i in load_split_files(args.database)["videos"]:
    uploader = i["uploader_id"] if "uploader_id" in i else None
    if uploader == channel:
        print("%s:" % i["id"])
        # :skull:
        # todo: put this in a function?
        if any(x in os.listdir(output) for x in [sanitize_filename(i["title"] + "-" + i["id"] + ".mp4", restricted=True),
                                                 sanitize_filename(i["title"] + "-" + i["id"] + ".mkv", restricted=True),
                                                 sanitize_filename(i["title"] + "-" + i["id"] + ".webm", restricted=True)]):
            print(" video already downloaded!")
            continue
        # this code is *really* ugly... todo a rewrite?
        with youtube_dl.YoutubeDL(ytdl_opts) as ytdl:
            try:
                result = ytdl.download(["https://youtube.com/watch?v=%s" % i["id"]])  # TODO: add check for existing downloaded items and don't download them
                continue
            except Exception:
                print(" video is not available! attempting to find Internet Archive pages of it...")
        if internetarchive.get_item("youtube-%s" % i["id"]).exists:  # download from internetarchive if available
            fnames = [f.name for f in internetarchive.get_files("youtube-%s" % i["id"])]
            flist = []
            for fname in range(len(fnames)):
                if re.search("((?:.+?-)?%s\.(?:mp4|jpg|webp|mkv|webm|info\.json|description))" % (i["id"]), fnames[fname]):
                    flist.append(fnames[fname])
            if len(flist) >= 1:
                internetarchive.download("youtube-%s" % i["id"], files=flist, verbose=True, destdir=output, no_directory=True, ignore_existing=True)
            else:
                print(" video already downloaded!")
                continue
            if os.path.exists(output + "/" + i["id"] + ".info.json"):  # will always exist no matter which setting was used to download
                for fname in flist:
                    if os.path.exists(output + "/" + fname) and not os.path.exists(output + "/" + sanitize_filename(i["title"], restricted=True) + "-" + fname):
                        os.rename(output + "/" + fname, output + "/" + sanitize_filename(i["title"], restricted=True) + "-" + fname)
            else:
                print("ID file not found!")
        else:
            print(" video does not have a Internet Archive page! attempting to download from the Wayback Machine...")
            try:  # we could use yt-dlp's extractor, but then we would need to craft a fake wayback machine url,
                  # and we wouldn't even know if it worked. so let's continue using our little "hack"
                headers = compat_urllib.urlopen("https://web.archive.org/web/2oe_/http://wayback-fakeurl.archive.org/yt/%s" % i["id"])
                if hasattr(headers.info(), "getheader"):
                    contenttype = headers.info().getheader("Content-Type")
                else:
                    contenttype = headers.getheader("Content-Type")
                if contenttype == "video/webm":
                    ext = "webm"
                elif contenttype == "video/mp4":
                    ext = "mp4"
                else:
                    raise HTTPError(url=None, code=None, msg=None, hdrs=None, fp=None)
                compat_urllib.urlretrieve("https://web.archive.org/web/2oe_/http://wayback-fakeurl.archive.org/yt/%s" % i["id"], "%s/%s-%s.%s" % (output, sanitize_filename(i["title"], restricted=True), i["id"], ext), reporthook)
                print(" downloaded %s-%s.%s" % (sanitize_filename(i["title"], restricted=True), i["id"], ext))
            except HTTPError:
                print(" video not available on the Wayback Machine!")
            except Exception as e:
                print(" unknown error downloading video!\n")
                print(e)
            # metadata
            with open("%s/%s-%s.info.json" % (output, sanitize_filename(i["title"], restricted=True), i["id"]), "w", encoding="utf-8") as jsonfile:
                jsonfile.write(json.dumps(i).decode("utf-8"))
                print(" saved %s" % os.path.basename(jsonfile.name))