"""License gate run by every package entrypoint.

    python -m sanad_pkg.license_check P1

Exit codes:
    0  -> ENTITLED (proceed to launch the package)
    1  -> NOT entitled (entrypoint should exit the container cleanly, code 0)
    2  -> license error / unreadable (treated as not entitled)

The entrypoint pattern (see Sanad_Package_*/entrypoint.sh):

    if ! python -m sanad_pkg.license_check "$PKG"; then
        echo "[$PKG] not licensed — container will idle/exit"; exit 0
    fi
"""
from __future__ import annotations

import sys

from sanad_pkg import license as _lic


def main(argv=None) -> int:
    argv = list(sys.argv[1:] if argv is None else argv)
    if not argv:
        sys.stderr.write("usage: python -m sanad_pkg.license_check <P1|P2|P3|P4>\n")
        return 2
    pkg = argv[0].strip().upper()

    lic = _lic.load()
    summary = lic.summary()
    if not lic.valid:
        sys.stderr.write("[license] INVALID: %s\n" % summary["reason"])
        return 2

    if lic.package(pkg):
        sys.stdout.write(
            "[license] %s ENTITLED (robot=%s, expires=%s)\n"
            % (pkg, summary["robot_id"] or "?", summary["expires"] or "never")
        )
        return 0

    sys.stderr.write(
        "[license] %s NOT entitled (entitled: %s)\n"
        % (pkg, ", ".join(k for k, v in summary["packages"].items() if v) or "none")
    )
    return 1


if __name__ == "__main__":
    raise SystemExit(main())