import logging
import os
import shutil
import signal
import subprocess
import tempfile
import time

import ox
import ox.iso

from django.conf import settings

from annotation import tasks
from item import utils
from itemlist.models import List
from item.models import Item
from user.models import User


logger = logging.getLogger(__name__)

def extract_subtitles(item, user, layer, translate, gpu=False):
    if "language" not in item.data:
        logger.error("skip item without language %s", item.public_id)
        return False
    language = ox.iso.langTo2Code(item.data["language"][0])
    if not language:
        logger.error("skip item with unknown language %s: %s", item.public_id, item.data["language"])
        return False
    if not item.streams():
        logger.error("skip item without media %s: %s", item.public_id)
        return False
    src = item.streams()[0].media.path

    tmp = tempfile.mkdtemp()
    cmd = [
        "/opt/whisper-timestamped/bin/whisper_timestamped",
        "--language", language,
    ]
    if translate and language in translate:
        cmd += [
            '--task', 'translate'
        ]
        language = 'en'
    if not gpu:
        cmd += [
            "--fp16", "False",
        ]

    cmd += [
        "-f", "srt",
        "--accurate",
        "--output_dir", tmp,
        src,
    ]
    try:
        subprocess.check_output(cmd)
    except:
        logger.error("failed to extract subtitles from item %s\n%s", item.public_id, cmd)
        shutil.rmtree(tmp)
        return False
    annotations = []
    for f in os.listdir(tmp):
        if f.endswith(".srt") and "words.srt" not in f:
            srt = os.path.join(tmp, f)
            annotations = ox.srt.load(srt)
    if not annotations:
        logger.error("no subtitles detected %s", item.public_id)
        return True
    if language != "en":
        for annotation in annotations:
            annotation["value"] = '<span lang="%s">%s</span>' % (language, annotation["value"])

    tasks.add_annotations.delay({
        'item': item.public_id,
        'layer': layer,
        'user': user.username,
        'annotations': annotations
    })
    shutil.rmtree(tmp)
    return True


def main(**kwargs):
    user = User.objects.get(username=kwargs['user'])
    queue = List.objects.get(user=user, name=kwargs['queue'])
    done = List.objects.get(user=user, name=kwargs['done'])
    layer = kwargs.get("layer")
    translate = kwargs.get("translate")
    if translate:
        translate = dict([tt.split(':') for tt in translate.split(',')])
    if not layer:
        layer = utils.get_by_key(settings.CONFIG['layers'], 'isSubtitles', True)
        if layer:
            layer = layer["id"]
        else:
            logger.error("no layer defined and config has no subtitle layer")
            return
    try:
        while True:
            wait = True
            for item in queue.get_items(queue.user).all():
                if extract_subtitles(item, user, layer, translate, kwargs.get("gpu")):
                    queue.items.remove(item)
                    done.items.remove(item)
                    wait = False
            if wait:
                time.sleep(5*60)
    except KeyboardInterrupt:
        pass