"""Unit tests for quality-depth gate helpers."""

from __future__ import annotations

import json
from types import SimpleNamespace

from scripts import check_mutation_score
from scripts import run_repeat_gate


def test_mutation_score_accepts_exact_floor_and_rejects_regression():
    stats = {"killed": 70, "total": 100, "check_was_interrupted_by_user": 0}
    assert check_mutation_score.validate_mutation_stats(stats, minimum=70) == []
    assert check_mutation_score.validate_mutation_stats(stats, minimum=70.01) == [
        "mutation score 70.00% (70/100) is below the 70.01% floor",
    ]


def test_mutation_score_rejects_malformed_and_interrupted_runs():
    assert check_mutation_score.validate_mutation_stats(
        {"killed": True, "total": 1}, minimum=70,
    ) == ["mutation statistics require a non-negative integer 'killed'"]
    assert check_mutation_score.validate_mutation_stats(
        {"killed": 1, "total": 1, "check_was_interrupted_by_user": 1}, minimum=70,
    ) == ["mutation run was interrupted"]


def test_repeat_orders_are_distinct_and_deterministic():
    paths = ["a", "b", "c", "d"]
    assert run_repeat_gate.test_orders(paths) == [
        ["a", "b", "c", "d"],
        ["d", "c", "b", "a"],
        ["a", "c", "b", "d"],
    ]


def test_repeat_gate_records_each_pass(monkeypatch, tmp_path):
    calls = []

    def fake_run(command, **kwargs):
        calls.append((command, kwargs["env"]["PYTHONHASHSEED"]))
        return SimpleNamespace(returncode=0, stdout="2 passed\n", stderr="")

    monkeypatch.setattr(run_repeat_gate.subprocess, "run", fake_run)
    output = tmp_path / "repeat.json"
    assert run_repeat_gate.run_repeat_gate(
        ["first.py", "second.py"], output=output, python="python-fixture",
    ) == 0
    evidence = json.loads(output.read_text())
    assert evidence["status"] == "passed"
    assert [entry["python_hash_seed"] for entry in evidence["passes"]] == [
        "0", "1", "8675309",
    ]
    assert calls[0][0] == [
        "python-fixture", "-m", "pytest", "--no-cov", "-q", "first.py", "second.py",
    ]


def test_repeat_gate_stops_and_preserves_failure_output(monkeypatch, tmp_path):
    def fake_run(*_args, **_kwargs):
        return SimpleNamespace(returncode=3, stdout="failed output", stderr="failure detail")

    monkeypatch.setattr(run_repeat_gate.subprocess, "run", fake_run)
    output = tmp_path / "repeat.json"
    assert run_repeat_gate.run_repeat_gate(["test.py"], output=output) == 3
    evidence = json.loads(output.read_text())
    assert evidence["status"] == "failed"
    assert len(evidence["passes"]) == 1
    assert evidence["passes"][0]["stderr"] == "failure detail"