"""
    Onionr - Private P2P Communication

    view and interact with onionr sites
"""
"""
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
"""
from typing import Union

import onionrexceptions
from onionrutils import mnemonickeys
from onionrutils import stringvalidators
from coredb import blockmetadb
from onionrblocks.onionrblockapi import Block

def find_site(user_id: str)->Union[str, None]:
    """Returns block hash string for latest block for a site by a given user id"""
    if '-' in user_id: user_id = mnemonickeys.get_base32(user_id)
    if not stringvalidators.validate_pub_key(user_id): raise onionrexceptions.InvalidPubkey
    found_site = None
    sites = blockmetadb.get_blocks_by_type('zsite')

    for site in sites:
        site = Block(site)
        if site.isSigner(user_id) and site.verifySig():
            found_site = site.hash
    return found_site