"""Tests for the JSON policy exporter.

The guarantee under test is the one that cannot be recovered from on the device
itself: the enforcing app must never be rendered into a policy that would hide
it. Everything else here is shape, not safety.
"""

from __future__ import annotations

import datetime as dt

from python_pkg.focus_policy.export import (
    ENFORCER_PACKAGE,
    policy_to_dict,
    policy_to_json,
)
from python_pkg.focus_policy.model import CurfewWindow, FocusPolicy, HomeLocation

_DEFAULT_CURFEW = CurfewWindow(start=dt.time(23, 0), end=dt.time(5, 0))


def _policy(
    *,
    # The launcher must be allowed or the model rejects the policy outright.
    allowed_packages: frozenset[str] = frozenset({"pl.mbank", "com.launcher"}),
    night_allowed_packages: frozenset[str] = frozenset({"pl.mbank", "com.launcher"}),
    curfew: CurfewWindow | None = _DEFAULT_CURFEW,
) -> FocusPolicy:
    """Build a policy with the enforcer deliberately absent from both lists."""
    return FocusPolicy(
        home=HomeLocation(
            latitude=52.2297,
            longitude=21.0122,
            radius_m=150.0,
            hysteresis_m=30.0,
        ),
        curfew=curfew,
        launcher_package="com.launcher",
        allowed_packages=allowed_packages,
        night_allowed_packages=night_allowed_packages,
        never_disable_prefixes=("com.android.",),
        workout_unblock_domains=frozenset({"youtube.com"}),
        browser_packages=frozenset({"org.mozilla.firefox"}),
    )


def test_enforcer_is_injected_into_both_allowlists() -> None:
    """The app must be allowed even when the source config omits it.

    Regression guard for the on-device finding of 2026-08-09: the enforcer was
    in neither allowlist, so the decision layer placed it in the hide set on
    every enforcing pass, leaving one in-app check as the sole thing preventing
    the app from hiding itself.
    """
    payload = policy_to_dict(_policy())

    assert ENFORCER_PACKAGE in payload["allowed_packages"]
    assert ENFORCER_PACKAGE in payload["night_allowed_packages"]


def test_enforcer_is_not_duplicated_when_already_present() -> None:
    """Injection is a set union, so an explicit entry stays single."""
    payload = policy_to_dict(
        _policy(
            allowed_packages=frozenset({"pl.mbank", "com.launcher", ENFORCER_PACKAGE}),
            night_allowed_packages=frozenset({"com.launcher", ENFORCER_PACKAGE}),
        ),
    )

    assert payload["allowed_packages"].count(ENFORCER_PACKAGE) == 1
    assert payload["night_allowed_packages"].count(ENFORCER_PACKAGE) == 1


def test_lists_are_sorted_for_stable_diffs() -> None:
    """Sorted output keeps a committed asset's diff meaningful."""
    payload = policy_to_dict(_policy())

    for key in (
        "allowed_packages",
        "night_allowed_packages",
        "never_disable_prefixes",
        "workout_unblock_domains",
        "browser_packages",
    ):
        assert payload[key] == sorted(payload[key])


def test_curfew_is_rendered_as_wall_clock_strings() -> None:
    """Kotlin parses `HH:MM`, not an ISO time."""
    assert policy_to_dict(_policy())["curfew"] == {"start": "23:00", "end": "05:00"}


def test_absent_curfew_renders_as_null() -> None:
    """A policy with no curfew must not fabricate one."""
    assert policy_to_dict(_policy(curfew=None))["curfew"] is None


def test_redact_home_blanks_coordinates_but_keeps_geometry() -> None:
    """A committed asset discloses the radius, never the location."""
    payload = policy_to_json(_policy(), redact_home=True)

    assert '"latitude": null' in payload
    assert '"longitude": null' in payload
    assert '"radius_m": 150.0' in payload


def test_coordinates_survive_when_not_redacted() -> None:
    """The provisioning path still needs the real values."""
    assert '"latitude": 52.2297' in policy_to_json(_policy())