"""Tests for myagents.settings."""

import json
from pathlib import Path

import pytest

from myagents import settings as settings_mod


@pytest.fixture()
def fake_config_dir(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> Path:
    config_dir = tmp_path / ".xiaohe" / "agent"
    monkeypatch.setattr(settings_mod, "CONFIG_DIR", config_dir)
    monkeypatch.setattr(settings_mod, "SETTINGS_PATH", config_dir / "settings.json")
    monkeypatch.setattr(
        settings_mod, "LEGACY_CONFIG_PATH", config_dir / "config.json"
    )
    return config_dir


class TestLoadSettings:
    def test_empty_when_no_files(self, fake_config_dir: Path) -> None:
        assert settings_mod.load_settings() == {}

    def test_settings_json_wins_over_legacy(self, fake_config_dir: Path) -> None:
        fake_config_dir.mkdir(parents=True)
        (fake_config_dir / "config.json").write_text(
            json.dumps({"keys": {}, "settings": {"a": "legacy", "b": "legacy"}})
        )
        (fake_config_dir / "settings.json").write_text(json.dumps({"b": "new"}))
        assert settings_mod.load_settings() == {"a": "legacy", "b": "new"}

    def test_corrupt_files_yield_empty(self, fake_config_dir: Path) -> None:
        fake_config_dir.mkdir(parents=True)
        (fake_config_dir / "settings.json").write_text("{not json")
        assert settings_mod.load_settings() == {}


class TestSaveAndSet:
    def test_set_setting_roundtrip(self, fake_config_dir: Path) -> None:
        settings_mod.set_setting("workspace_root", "/tmp/ws")
        assert settings_mod.get_setting("workspace_root") == "/tmp/ws"
        on_disk = json.loads((fake_config_dir / "settings.json").read_text())
        assert on_disk == {"workspace_root": "/tmp/ws"}

    def test_get_setting_default(self, fake_config_dir: Path) -> None:
        assert settings_mod.get_setting("missing", "dflt") == "dflt"