from unittest.mock import patch

import pytest

from openrgb_hue.scenes import (
    BUNDLED_CSV_PATH,
    SceneNotFoundError,
    get_scene,
    list_scene_names,
    load_scenes,
    refresh_bundled_csv,
)

SAMPLE_CSV = (
    "Scene,Light,Red,Green,Blue,Brightness\n"
    "Alpha,light.hue_1,255,0,0,255\n"
    "Alpha,light.hue_2,0,255,0,200\n"
    "Beta,light.hue_1,0,0,255,100\n"
)


@pytest.fixture
def sample_csv_path(tmp_path):
    path = tmp_path / "scenes.csv"
    path.write_text(SAMPLE_CSV, encoding="utf-8")
    return path


def test_load_scenes_groups_by_name_preserving_order(sample_csv_path):
    scenes = load_scenes(sample_csv_path)
    assert list(scenes.keys()) == ["Alpha", "Beta"]
    assert len(scenes["Alpha"].lights) == 2
    assert len(scenes["Beta"].lights) == 1


def test_list_scene_names(sample_csv_path):
    assert list_scene_names(sample_csv_path) == ["Alpha", "Beta"]


def test_get_scene_case_insensitive(sample_csv_path):
    scene = get_scene("alpha", sample_csv_path)
    assert scene.name == "Alpha"


def test_get_scene_missing_raises_with_suggestion(sample_csv_path):
    with pytest.raises(SceneNotFoundError, match="Alpha"):
        get_scene("Alphaa", sample_csv_path)


def test_bundled_csv_has_103_scenes_of_10_lights_each():
    scenes = load_scenes(BUNDLED_CSV_PATH)
    assert len(scenes) == 103
    assert all(len(scene.lights) == 10 for scene in scenes.values())


def test_refresh_bundled_csv_writes_validated_data(tmp_path):
    dest = tmp_path / "scenes.csv"

    class FakeResponse:
        def __enter__(self):
            return self

        def __exit__(self, *exc):
            return False

        def read(self):
            return SAMPLE_CSV.encode("utf-8")

    with patch("openrgb_hue.scenes.urllib.request.urlopen", return_value=FakeResponse()):
        result = refresh_bundled_csv(dest=dest, url="https://example.invalid/scenes.csv")

    assert result == dest
    assert dest.read_text(encoding="utf-8") == SAMPLE_CSV


def test_refresh_bundled_csv_rejects_invalid_data(tmp_path):
    dest = tmp_path / "scenes.csv"

    class FakeResponse:
        def __enter__(self):
            return self

        def __exit__(self, *exc):
            return False

        def read(self):
            return b"not,a,valid,csv\n"

    with patch("openrgb_hue.scenes.urllib.request.urlopen", return_value=FakeResponse()):
        with pytest.raises(ValueError):
            refresh_bundled_csv(dest=dest, url="https://example.invalid/scenes.csv")
    assert not dest.exists()