import hashlib
import json
import time

from coincurve import PrivateKey, PublicKeyXOnly


def sign_event(sk: bytes, pubkey: str, kind: int, content: str, tags: list[list[str]]) -> dict:
    event = {
        "pubkey": pubkey,
        "created_at": int(time.time()),
        "kind": kind,
        "tags": tags,
        "content": content,
    }
    serialized = json.dumps(
        [0, event["pubkey"], event["created_at"], event["kind"], event["tags"], event["content"]],
        separators=(",", ":"),
        ensure_ascii=False,
    )
    event["id"] = hashlib.sha256(serialized.encode()).hexdigest()
    pk = PrivateKey(sk)
    sig = pk.sign_schnorr(bytes.fromhex(event["id"]))
    event["sig"] = sig.hex() if isinstance(sig, bytes) else sig
    return event


def verify_event(event: dict) -> bool:
    try:
        serialized = json.dumps(
            [0, event["pubkey"], event["created_at"], event["kind"], event["tags"], event["content"]],
            separators=(",", ":"),
            ensure_ascii=False,
        )
        expected_id = hashlib.sha256(serialized.encode()).hexdigest()
        if expected_id != event.get("id", ""):
            return False
        xonly = PublicKeyXOnly(bytes.fromhex(event["pubkey"]))
        return xonly.verify(bytes.fromhex(event["sig"]), bytes.fromhex(event["id"]))
    except Exception:
        return False