#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-3.0-or-later
"""Mutation guardrails for Phase-1.0Y offline shsrv framing."""

from __future__ import annotations

import argparse
import importlib.util
from pathlib import Path
import sys


def load(path: Path):
    spec = importlib.util.spec_from_file_location("phase10y_validator", path)
    assert spec and spec.loader
    module = importlib.util.module_from_spec(spec)
    sys.modules[spec.name] = module
    spec.loader.exec_module(module)
    return module


def require(value: bool, message: str) -> None:
    if not value:
        raise RuntimeError(message)


def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--root", type=Path, required=True)
    args = parser.parse_args()
    root = args.root.resolve()
    validator = load(root / "tools/validate_retroarch_phase10y.py")
    record = validator.load_json(
        root / "manifests/retroarch/phase-1.0y-shsrv-framing.json")
    cases = []

    def case(name):
        def register(function):
            cases.append((name, function))
            return function
        return register

    @case("01 all authorizations remain false")
    def _(): require(validator.all_authorizations_false(record["authorizations"]), "authority active")

    @case("02 connection authority is rejected")
    def _():
        value = dict(record["authorizations"]); value["ps5_connection_authorized"] = True
        require(not validator.all_authorizations_false(value), "connection accepted")

    @case("03 activation is inert")
    def _(): require(validator.activation_is_inactive(record["activation"]), "activation rejected")

    @case("04 source family activation is rejected")
    def _():
        value = dict(record["activation"]); value["source_family"] = "LIBTELNET_NVT_V09_V019"
        require(not validator.activation_is_inactive(value), "family activated")

    @case("05 model remains offline")
    def _(): require(validator.model_is_offline(record["offline_model"]), "model rejected")

    @case("06 network import claim is rejected")
    def _():
        value = dict(record["offline_model"]); value["network_import_present"] = True
        require(not validator.model_is_offline(value), "network accepted")

    @case("07 two source families remain distinct")
    def _(): require(set(record["source_families"]) == {"LEGACY_RAW_V07_V08", "LIBTELNET_NVT_V09_V019"}, "families collapsed")

    @case("08 legacy controls pass to shell")
    def _(): require(record["source_families"]["LEGACY_RAW_V07_V08"]["telnet_controls_pass_to_shell"] is True, "legacy behavior hidden")

    @case("09 current server does not proactively negotiate")
    def _(): require(record["source_families"]["LIBTELNET_NVT_V09_V019"]["proactive_negotiation"] is False, "negotiation invented")

    @case("10 current unsupported WILL and DO replies remain exact")
    def _():
        current = record["source_families"]["LIBTELNET_NVT_V09_V019"]
        require(current["will_reply"] == "IAC_DONT" and current["do_reply"] == "IAC_WONT", "reply mismatch")

    @case("11 server echo remains absent")
    def _(): require(all(value["server_side_echo"] is False for value in record["source_families"].values()), "echo invented")

    @case("12 prompt completion remains unproven")
    def _(): require(validator.prompt_remains_unproven(record["prompt_and_completion"]), "prompt promoted")

    @case("13 short-write loop remains absent")
    def _(): require(record["prompt_and_completion"]["short_write_completion_loop"] is False, "short writes hidden")

    @case("14 IAC signal commands remain excluded")
    def _(): require(record["risks"]["iac_signal_commands"] == "HIGH_FUNCTIONAL_EXCLUDED_INPUT", "IAC effect weakened")

    @case("15 deployed family remains unproven")
    def _(): require(record["decision"]["exact_deployed_shsrv_identity"] == "UNPROVEN", "identity promoted")

    @case("16 no live client is allowed")
    def _(): require(record["decision"]["live_client_implementation_allowed"] is False, "live implementation allowed")

    @case("17 next step remains offline passive contract")
    def _(): require(validator.decision_is_offline_only(record["decision"]), "live next step enabled")

    @case("18 no action and no hardware proof")
    def _(): require(all(value is False for value in record["performed_actions"].values()) and record["tests"]["hardware_claim_from_host_test"] is False, "host evidence promoted")

    failures = []
    for name, function in cases:
        try:
            function()
            print(f"PASS {name}")
        except Exception as error:  # noqa: BLE001 - mutation harness
            failures.append(f"{name}: {error}")
            print(f"FAIL {name}: {error}")
    if failures:
        return 1
    print(f"Phase-1.0Y guardrails passed: {len(cases)}")
    return 0


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