import sqlite3


def version_exists(conn: sqlite3.Connection, app_id: str, channel: str, version: str) -> bool:
    return conn.execute(
        "SELECT 1 FROM versions WHERE app_id=? AND channel=? AND version=?",
        (app_id, channel, version),
    ).fetchone() is not None


def create_version(conn: sqlite3.Connection, app_id: str, channel: str, version: str, client_protocol: int) -> int:
    conn.execute("UPDATE versions SET latest=0 WHERE app_id=? AND channel=?", (app_id, channel))
    cur = conn.execute(
        "INSERT INTO versions(app_id, channel, version, latest, client_protocol) VALUES (?,?,?,1,?)",
        (app_id, channel, version, client_protocol),
    )
    return int(cur.lastrowid)


def insert_version_file(conn: sqlite3.Connection, version_id: int, path: str, sha256: str, size: int):
    conn.execute(
        "INSERT INTO version_files(version_id, path, sha256, size) VALUES (?,?,?,?)",
        (version_id, path, sha256, size),
    )