"""Install only the plugin DLL/manifest; --maintenance-approved permits the agreed restart."""
import argparse
import datetime
import hashlib
import json
import pathlib
import shutil
import sqlite3
import subprocess
import time
import urllib.error
import urllib.request

parser = argparse.ArgumentParser()
parser.add_argument('--maintenance-approved', action='store_true')
args = parser.parse_args()
key = sqlite3.connect('file:/var/lib/jellyfin/data/jellyfin.db?mode=ro', uri=True).execute('SELECT AccessToken FROM ApiKeys LIMIT 1').fetchone()[0]
headers = {'Authorization': 'MediaBrowser Token="' + key + '", Client="PluginDeployment", Device="Server", DeviceId="plugin-deployment", Version="7"'}
sessions = json.load(urllib.request.urlopen(urllib.request.Request('http://127.0.0.1:8096/Sessions', headers=headers)))
if any(s.get('NowPlayingItem') for s in sessions) and not args.maintenance_approved:
    raise SystemExit('Active playback: maintenance approval required')
protected = ['/etc/default/jellyfin', '/etc/jellyfin/encoding.xml', '/usr/local/lib/jellyfin-enigma/ffmpeg', '/usr/local/lib/jellyfin-enigma/ffprobe', '/usr/share/jellyfin/web/config.json', '/usr/share/jellyfin/web/index.html']
def hashes():
    return {p: hashlib.sha256(pathlib.Path(p).read_bytes()).hexdigest() for p in protected if pathlib.Path(p).exists()}
before = hashes()
plugins = pathlib.Path('/var/lib/jellyfin/plugins')
old = [p for p in plugins.glob('Enigma2_*') if p.is_dir()]
backup = pathlib.Path('/var/lib/jellyfin/decoder-plugin-backups') / ('plugin-only-' + datetime.datetime.now(datetime.timezone.utc).strftime('%Y%m%dT%H%M%SZ'))
backup.mkdir(mode=0o700)
new = plugins / 'Enigma2_7.0.7.0'
metadata = json.loads((old[0] / 'meta.json').read_text())
metadata.update(version='7.0.7.0', status='Active', targetAbi='12.2.0.0')
subprocess.run(['systemctl', 'stop', 'jellyfin'], check=True)
try:
    for p in old:
        shutil.move(str(p), str(backup / p.name))
    new.mkdir()
    shutil.copy2('/tmp/Jellyfin.Plugin.Enigma2.dll', new / 'Jellyfin.Plugin.Enigma2.dll')
    (new / 'meta.json').write_text(json.dumps(metadata))
    subprocess.run(['chown', '-R', 'jellyfin:jellyfin', str(new)], check=True)
except Exception:
    if new.exists():
        shutil.rmtree(new)
    for p in old:
        if (backup / p.name).exists():
            shutil.move(str(backup / p.name), str(p))
    raise
finally:
    subprocess.run(['systemctl', 'start', 'jellyfin'], check=True)
assert hashes() == before, 'Unexpected change outside plugin installation'
deadline = time.monotonic() + 45
while True:
    try:
        installed = json.load(urllib.request.urlopen(urllib.request.Request('http://127.0.0.1:8096/Plugins', headers=headers), timeout=3))
        if any(p['Name'] == 'Enigma2' and p['Version'] == '7.0.7.0' and p['Status'] == 'Active' for p in installed):
            break
    except (urllib.error.URLError, TimeoutError):
        pass
    if time.monotonic() >= deadline:
        raise RuntimeError('Jellyfin did not load the deployed plugin within 45 seconds; backup: ' + str(backup))
    time.sleep(1)
print(json.dumps({'plugin': '7.0.7.0', 'backup': str(backup), 'ready': True, 'server_configuration_and_wrappers_unchanged': True}))