"""Tests for configuration management."""

import json
from pathlib import Path

from src.config import get_config, is_developer_mode


def _fresh_config(monkeypatch, config_dir):
    """Reset singleton and point Config at a specific directory."""
    config_path = Path(config_dir)
    monkeypatch.setattr("src.config.Config._instance", None)
    monkeypatch.setattr("src.config.CONFIG_DIR", config_path)
    monkeypatch.setattr("src.config.CONFIG_FILE", config_path / "config.json")


class TestConfig:
    def test_defaults(self, tmp_path, monkeypatch):
        _fresh_config(monkeypatch, tmp_path)
        config = get_config()
        assert config.developer_mode is False
        assert config.auto_select_single_device is True
        assert config.default_screenshot_dir is None

    def test_developer_mode_toggle(self, tmp_path, monkeypatch):
        _fresh_config(monkeypatch, tmp_path)
        config = get_config()
        assert config.developer_mode is False
        config.developer_mode = True
        assert config.developer_mode is True

    def test_persistence(self, tmp_path, monkeypatch):
        _fresh_config(monkeypatch, tmp_path)
        config = get_config()
        config.developer_mode = True

        config_file = tmp_path / "config.json"
        assert config_file.exists()
        data = json.loads(config_file.read_text())
        assert data["developer_mode"] is True

    def test_screenshot_dir(self, tmp_path, monkeypatch):
        _fresh_config(monkeypatch, tmp_path)
        config = get_config()
        config.default_screenshot_dir = "/tmp/shots"
        assert config.default_screenshot_dir == "/tmp/shots"

    def test_get_set(self, tmp_path, monkeypatch):
        _fresh_config(monkeypatch, tmp_path)
        config = get_config()
        config.set("custom_key", "custom_value")
        assert config.get("custom_key") == "custom_value"

    def test_to_dict(self, tmp_path, monkeypatch):
        _fresh_config(monkeypatch, tmp_path)
        config = get_config()
        d = config.to_dict()
        assert "developer_mode" in d
        assert "auto_select_single_device" in d

    def test_load_corrupt_file(self, tmp_path, monkeypatch):
        _fresh_config(monkeypatch, tmp_path)
        (tmp_path / "config.json").write_text("{invalid json")
        # Need a fresh singleton to trigger _load with corrupt file
        monkeypatch.setattr("src.config.Config._instance", None)
        config = get_config()
        assert config.developer_mode is False


class TestIsDeveloperMode:
    def test_off_by_default(self, tmp_path, monkeypatch):
        _fresh_config(monkeypatch, tmp_path)
        assert is_developer_mode() is False

    def test_on_when_enabled(self, tmp_path, monkeypatch):
        _fresh_config(monkeypatch, tmp_path)
        get_config().developer_mode = True
        assert is_developer_mode() is True