"""Project-local default paths shared by ACE command-line entrypoints."""

from __future__ import annotations

from pathlib import Path


PROJECT_ROOT = Path(__file__).resolve().parents[1]
DATA_DIR = PROJECT_ROOT / "data"
GENERATED_DATA_DIR = DATA_DIR / "data"
GENERATED_DATA_PATH = GENERATED_DATA_DIR / "ace_pairs.npz"
CHECKPOINT_DIR = DATA_DIR / "checkpoint"
CHECKPOINT_PATH = CHECKPOINT_DIR / "model_bak.pt"
OUTPUT_DIR = PROJECT_ROOT / "output"
INFER_DIR = OUTPUT_DIR / "infer"
INFER_PATH = INFER_DIR / "rollout.npz"
PIC_DIR = OUTPUT_DIR / "pic"


def resolve_project_path(value: str | Path, *, base: Path = PROJECT_ROOT) -> Path:
    """Resolve a configured path relative to the ACE project root."""
    path = Path(value).expanduser()
    return path if path.is_absolute() else base / path


def configured_path(config: dict, key: str, fallback: Path) -> Path:
    """Read a path from ``config.paths`` while preserving a safe project default."""
    value = config.get("paths", {}).get(key)
    return resolve_project_path(value) if value else fallback