"""V4 arm-readiness reporter — self-test to death.

Spec: prod/docs/VIOLET_PASS_MM1_V4_READINESS_REPORTER.md
Style: follows test_violet_domain.py patterns.
"""

from __future__ import annotations

import sys
sys.path.insert(0, "/mnt/dolphinng5_predict")

import pytest
from hypothesis import given, settings
from hypothesis import strategies as st

from prod.clean_arch.violet.v4_readiness import (
    V4ReadinessReport,
    assess_v4_readiness,
)

ALL_FIELDS = [
    "creds_ok", "canary_passed", "arming_gate_present",
    "conviction_bit_identical", "selection_parity_ok", "feed_live",
]


def _all_true(**overrides: bool) -> dict:
    return {f: overrides.get(f, True) for f in ALL_FIELDS}


def _single_false(field: str) -> dict:
    return _all_true(**{field: False})


# ── happy path ────────────────────────────────────────────────────────────────

def test_all_true_ready_to_arm():
    r = assess_v4_readiness(**_all_true())
    assert r.ready_to_arm is True
    assert r.reasons == []


# ── each single False yields ready_to_arm=False + correct reason ─────────────

@pytest.mark.parametrize("field", ALL_FIELDS)
def test_single_false_not_ready(field: str):
    r = assess_v4_readiness(**_single_false(field))
    assert r.ready_to_arm is False
    assert len(r.reasons) == 1
    assert field in r.reasons[0]


# ── hypothesis: invariant holds across all 2^6 combos ────────────────────────

@given(
    creds_ok=st.booleans(),
    canary_passed=st.booleans(),
    arming_gate_present=st.booleans(),
    conviction_bit_identical=st.booleans(),
    selection_parity_ok=st.booleans(),
    feed_live=st.booleans(),
)
@settings(max_examples=100)
def test_ready_to_arm_equals_all_inputs(
    creds_ok: bool,
    canary_passed: bool,
    arming_gate_present: bool,
    conviction_bit_identical: bool,
    selection_parity_ok: bool,
    feed_live: bool,
):
    r = assess_v4_readiness(
        creds_ok=creds_ok,
        canary_passed=canary_passed,
        arming_gate_present=arming_gate_present,
        conviction_bit_identical=conviction_bit_identical,
        selection_parity_ok=selection_parity_ok,
        feed_live=feed_live,
    )
    expected = all((
        creds_ok, canary_passed, arming_gate_present,
        conviction_bit_identical, selection_parity_ok, feed_live,
    ))
    assert r.ready_to_arm is expected


# ── mutation litmus: flipping all() to any() MUST break this test ────────────

def test_mutation_litmus_all_must_be_true():
    """If someone changes all() to any(), at least one all-False should become
    ready_to_arm=True — this test catches it."""
    r = assess_v4_readiness(**{f: False for f in ALL_FIELDS})
    assert r.ready_to_arm is False
    assert len(r.reasons) == 6


# ── poison: StrictModel rejects non-bool / extra fields ─────────────────────

def test_rejects_non_bool():
    with pytest.raises(Exception):
        V4ReadinessReport(
            creds_ok={"ok": True},   # dict is not coercible to bool
            canary_passed=True,
            arming_gate_present=True,
            conviction_bit_identical=True,
            selection_parity_ok=True,
            feed_live=True,
            reasons=[],
        )


def test_rejects_extra_fields():
    with pytest.raises(Exception):
        V4ReadinessReport(
            creds_ok=True,
            canary_passed=True,
            arming_gate_present=True,
            conviction_bit_identical=True,
            selection_parity_ok=True,
            feed_live=True,
            reasons=[],
            unknown_field="oops",
        )


def test_rejects_frozen_mutation():
    r = assess_v4_readiness(**_all_true())
    with pytest.raises(Exception):
        r.creds_ok = False  # type: ignore[misc]


# ── reasons content check: False fields produce descriptive strings ──────────

def test_reasons_mention_gate_name():
    r = assess_v4_readiness(**_single_false("feed_live"))
    assert any("PASS2.6" in reason for reason in r.reasons)


if __name__ == "__main__":
    raise SystemExit(pytest.main([__file__, "-v"]))