"""KERNEL-2 lane resolution and KERNEL-3 mode-aware admission (fixture only)."""
from dataclasses import asdict, replace
import json

import pytest
import yaml

from warden.case_receipt_state import Refused
from warden.case_run import Descriptor, digest
from tests.test_case_run import MINT_STEP, fixture_catalog, lane_entry, make_rig


@pytest.fixture
def rig(tmp_path):
    return make_rig(tmp_path)

EVIDENCE = {"acceptance", "materialization", "descriptor", "session"}


def admit(rig, *, step=None, entries=None, catalog=None, desc=None, **over):
    executor, _, _, sources, kwargs = rig
    case, typ, descriptor, _ = sources
    if desc is not None:
        base = Descriptor.decode(descriptor)
        descriptor = json.dumps(asdict(replace(base, **desc))).encode()
    doc = yaml.safe_load(typ)
    doc["spec"]["execution_descriptors"] = {"mint-secret": digest(descriptor)}
    if step is not None:
        doc["spec"]["follow_through"] = step
    typ = yaml.safe_dump(doc).encode()
    if catalog is None:
        catalog = fixture_catalog(*(entries or [lane_entry()]))
    executor.evidence_verifier = lambda purpose, source, evidence: evidence in EVIDENCE
    return executor.admit(case, typ, descriptor, catalog, **{**kwargs, **over})


def mode_step(executes, attended):
    return [dict(MINT_STEP, warden_executes=executes, attended=attended)]


def refused(message, rig, **kw):
    with pytest.raises(Refused, match=message):
        admit(rig, **kw)


# Positive modes
def test_warden_mode_admits(rig):
    assert admit(rig)[1].lane == "issuer-lane"


def test_attended_mode_admits_human_parent_session(rig, monkeypatch):
    monkeypatch.delenv("WARDEN_AGENT_ID", raising=False)
    admitted = admit(
        rig,
        step=mode_step(False, True),
        desc=dict(effect="change", revocation_scopes=("parent-session",)),
    )
    assert admitted[1].actor == "human"


def test_owner_mode_admits_native_owner_lane(rig):
    admitted = admit(rig, step=mode_step(False, False), desc=dict(effect="change"))
    assert admitted[1].owner == "owner"


# KERNEL-2
@pytest.mark.parametrize(
    "entries, catalog, message",
    [
        (None, b"not: [a catalog", "invalid catalog source shape"),
        ([lane_entry("other-lane")], None, "descriptor lane is not in the catalog"),
        ([lane_entry(status="draft")], None, "descriptor lane is not active in the catalog"),
        ([{k: v for k, v in lane_entry().items() if k != "delegation"}], None,
         "descriptor lane has no catalog delegation record"),
        ([{k: v for k, v in lane_entry().items() if k != "risk"}], None,
         "descriptor lane carries no risk grade"),
        ([lane_entry(owner="someone-else")], None,
         "descriptor owner does not fit catalog lane owner_repo"),
        ([lane_entry(risk="standard")], None,
         "catalog lane risk does not cover the descriptor effect"),
    ],
)
def test_catalog_lane_refusals(rig, entries, catalog, message):
    refused(message, rig, entries=entries, catalog=catalog)


# KERNEL-3: the step must declare dispatch and agree with the descriptor
@pytest.mark.parametrize(
    "step, message",
    [
        ([], "type step does not declare how the kernel dispatches it"),
        (mode_step(True, True), "type step does not declare how the kernel dispatches it"),
        ([{k: v for k, v in MINT_STEP.items() if k != "lane"}],
         "type step does not declare how the kernel dispatches it"),
        ([dict(MINT_STEP, warden_executes="yes")],
         "type step does not declare how the kernel dispatches it"),
        ([dict(MINT_STEP, lane="other-lane")], "type step lane or owner disagrees with descriptor"),
        ([dict(MINT_STEP, owner="other")], "type step lane or owner disagrees with descriptor"),
    ],
)
def test_step_declaration_refusals(rig, step, message):
    refused(message, rig, step=step)


def test_attended_refuses_agent_session(rig, monkeypatch):
    monkeypatch.setenv("WARDEN_AGENT_ID", "agent-1")
    refused("attended step requires a human parent session", rig,
            step=mode_step(False, True), desc=dict(effect="change"))


def test_attended_refuses_agent_actor(rig):
    refused("attended step requires a human parent session", rig,
            step=mode_step(False, True), desc=dict(effect="change", actor="agent"),
            actor="agent")


def test_attended_refuses_caller_lane_other_than_step_lane(rig):
    refused("principal actor or lane mismatch", rig,
            step=mode_step(False, True), desc=dict(effect="change"), lane="login-lane")


@pytest.mark.parametrize(
    "entry, desc",
    [
        (lane_entry(delegation={"mode": "interim", "intended_owner": "owner",
                                "blocked_on": "fixture", "reviewed": "2026-10-17"}),
         dict(effect="change")),
        (lane_entry(owner="owner/other"), dict(effect="change")),
        (lane_entry(warden_executes=True), dict(effect="change")),
        (lane_entry(), {}),  # owner step may not be a Warden-brokered mint
    ],
)
def test_owner_mode_refusals(rig, entry, desc):
    refused("owner step lane is not the owner's native path", rig,
            step=mode_step(False, False), entries=[entry], desc=desc)