"""Tests for config writer."""

import tomllib
from pathlib import Path

from vigilar.config import CameraConfig, VigilarConfig
from vigilar.config_writer import (
    save_config,
    update_camera_config,
    update_config_section,
)


def test_update_config_section():
    cfg = VigilarConfig()
    assert cfg.system.timezone == "UTC"

    new_cfg = update_config_section(cfg, "system", {"timezone": "America/New_York"})
    assert new_cfg.system.timezone == "America/New_York"
    # Original unchanged
    assert cfg.system.timezone == "UTC"


def test_update_camera_config():
    cfg = VigilarConfig(cameras=[
        CameraConfig(id="cam1", display_name="Cam 1", rtsp_url="rtsp://a"),
    ])
    assert cfg.cameras[0].motion_sensitivity == 0.7

    new_cfg = update_camera_config(cfg, "cam1", {"motion_sensitivity": 0.9})
    assert new_cfg.cameras[0].motion_sensitivity == 0.9


def test_save_and_reload(tmp_path):
    cfg = VigilarConfig(cameras=[
        CameraConfig(id="test", display_name="Test Cam", rtsp_url="rtsp://localhost"),
    ])

    path = tmp_path / "test.toml"
    save_config(cfg, path)

    assert path.exists()
    with open(path, "rb") as f:
        data = tomllib.load(f)

    assert data["system"]["name"] == "Vigilar Home Security"
    assert len(data["cameras"]) == 1
    assert data["cameras"][0]["id"] == "test"


def test_save_creates_backup(tmp_path):
    path = tmp_path / "test.toml"
    cfg = VigilarConfig()

    # First save
    save_config(cfg, path)
    assert path.exists()

    # Second save should create backup
    save_config(cfg, path)
    backups = list(tmp_path.glob("*.bak.*"))
    assert len(backups) == 1