"""Tests for the CLI startup gates (design doc §10 step 4, §8.1).

``_startup_gates`` is the shared refuse-startup path for the chat entry and
``serve``: legacy model-configuration artifacts abort with the reset guide,
and a bootstrap registry aborts with ``MODEL_REGISTRY_NOT_READY`` — both
with exit code 1, never a silent fall-through to an implicit model.
"""

from __future__ import annotations

from unittest.mock import MagicMock

import pytest
import typer

import EvoScientist.config.legacy_artifacts as legacy_artifacts
import EvoScientist.model_registry.runtime as runtime_module
from EvoScientist.cli.commands import _startup_gates
from EvoScientist.config.legacy_artifacts import LegacyArtifactsError
from EvoScientist.model_registry.errors import (
    MODEL_REGISTRY_NOT_READY,
    ModelRegistryError,
)


def test_legacy_artifacts_abort_startup(monkeypatch):
    monkeypatch.setattr(
        legacy_artifacts,
        "assert_no_legacy_artifacts",
        MagicMock(side_effect=LegacyArtifactsError("legacy providers.yaml found")),
    )
    with pytest.raises(typer.Exit) as excinfo:
        _startup_gates()
    assert excinfo.value.exit_code == 1


def test_bootstrap_registry_aborts_startup(monkeypatch):
    monkeypatch.setattr(
        legacy_artifacts, "assert_no_legacy_artifacts", MagicMock()
    )
    runtime = MagicMock()
    runtime.registry_default.side_effect = ModelRegistryError(
        MODEL_REGISTRY_NOT_READY, "bootstrap"
    )
    monkeypatch.setattr(runtime_module, "get_snapshot_runtime", lambda: runtime)
    with pytest.raises(typer.Exit) as excinfo:
        _startup_gates()
    assert excinfo.value.exit_code == 1


def test_clean_environment_passes(monkeypatch):
    monkeypatch.setattr(
        legacy_artifacts, "assert_no_legacy_artifacts", MagicMock()
    )
    runtime = MagicMock()
    runtime.registry_default.return_value = (MagicMock(), 2)
    monkeypatch.setattr(runtime_module, "get_snapshot_runtime", lambda: runtime)
    _startup_gates()  # must not raise


def test_non_bootstrap_registry_error_propagates(monkeypatch):
    """Only NOT_READY is converted to a guided exit; other errors bubble up."""
    monkeypatch.setattr(
        legacy_artifacts, "assert_no_legacy_artifacts", MagicMock()
    )
    runtime = MagicMock()
    runtime.registry_default.side_effect = ModelRegistryError(
        "SNAPSHOT_EXPIRED", "expired"
    )
    monkeypatch.setattr(runtime_module, "get_snapshot_runtime", lambda: runtime)
    with pytest.raises(ModelRegistryError):
        _startup_gates()