"""CLI: compute a view_hash or awareness_hash over a document.

    python -m informed_decision <path.json> [view|awareness]
"""

from __future__ import annotations

import json
import pathlib
import sys

from .canonicalize import awareness_hash, view_hash


def main(argv: list[str]) -> int:
    if not argv:
        print(__doc__, file=sys.stderr)
        return 2
    data = json.loads(pathlib.Path(argv[0]).read_text(encoding="utf-8"))
    kind = argv[1] if len(argv) > 1 else "view"
    if kind not in ("view", "awareness"):
        print(f"unknown kind {kind!r}; expected 'view' or 'awareness'", file=sys.stderr)
        return 2
    result = view_hash(data) if kind == "view" else awareness_hash(data)
    print(result["canonical"])
    print(result["hex"])
    return 0


if __name__ == "__main__":
    raise SystemExit(main(sys.argv[1:]))