"""
Use the persistent defeatbeta httpfs cache at ~/.cache/defeatbeta/.

Import this at the top of any notebook or script before using Ticker().
Run warmup_cache.py once first to populate the cache.

    from persistent_cache import enable_persistent_cache
    enable_persistent_cache()

    from defeatbeta_api.data.ticker import Ticker
    t = Ticker("AAPL")
"""
from pathlib import Path

CACHE_DIR = Path.home() / ".cache" / "defeatbeta"

def enable_persistent_cache() -> None:
    import defeatbeta_api.utils.util as _util
    import defeatbeta_api.client.duckdb_client as _duckdb_mod
    from defeatbeta_api.client.duckdb_conf import Configuration

    if not CACHE_DIR.exists():
        raise RuntimeError(
            f"Cache directory not found: {CACHE_DIR}\n"
            "Run warmup_cache.py first to populate it."
        )

    # Redirect cache directory to the persistent location
    _util.validate_httpfs_cache_directory = lambda: str(CACHE_DIR)

    # Reset singleton so DuckDB reinitialises pointing at the new cache dir
    _duckdb_mod._instance = None

    print(f"[persistent_cache] cache → {CACHE_DIR}")