# ABOUTME: Tests for configuration loading from moongreet.toml.
# ABOUTME: Verifies parsing of appearance and behavior settings.

from pathlib import Path

import pytest

from moongreet.config import load_config, resolve_wallpaper_path, Config


class TestLoadConfig:
    """Tests for loading moongreet.toml configuration."""

    def test_loads_background_path(self, tmp_path: Path) -> None:
        toml_file = tmp_path / "moongreet.toml"
        toml_file.write_text(
            "[appearance]\n"
            'background = "/usr/share/backgrounds/test.jpg"\n'
        )

        config = load_config(toml_file)

        assert config.background == Path("/usr/share/backgrounds/test.jpg")

    def test_returns_none_background_when_missing(self, tmp_path: Path) -> None:
        toml_file = tmp_path / "moongreet.toml"
        toml_file.write_text("[appearance]\n")

        config = load_config(toml_file)

        assert config.background is None

    def test_returns_defaults_for_missing_file(self, tmp_path: Path) -> None:
        config = load_config(tmp_path / "nonexistent.toml")

        assert config.background is None

    def test_returns_defaults_for_corrupt_toml(self, tmp_path: Path) -> None:
        toml_file = tmp_path / "moongreet.toml"
        toml_file.write_text("this is not valid [[[ toml !!!")

        config = load_config(toml_file)

        assert config.background is None

    def test_resolves_relative_path_against_config_dir(self, tmp_path: Path) -> None:
        toml_file = tmp_path / "moongreet.toml"
        toml_file.write_text(
            "[appearance]\n"
            'background = "wallpaper.jpg"\n'
        )

        config = load_config(toml_file)

        assert config.background == tmp_path / "wallpaper.jpg"


class TestResolveWallpaperPath:
    """Tests for resolving the wallpaper path from config or package default."""

    def test_uses_configured_path_when_exists(self, tmp_path: Path) -> None:
        wallpaper = tmp_path / "custom.jpg"
        wallpaper.write_bytes(b"fake-image")
        config = Config(background=wallpaper)

        path, ctx = resolve_wallpaper_path(config)

        assert path == wallpaper
        assert ctx is None

    def test_falls_back_to_package_default(self) -> None:
        config = Config(background=None)

        path, ctx = resolve_wallpaper_path(config)

        assert path is not None
        assert path.exists()
        assert ctx is not None
        # Clean up context manager
        ctx.__exit__(None, None, None)

    def test_falls_back_when_configured_path_missing(self, tmp_path: Path) -> None:
        config = Config(background=tmp_path / "nonexistent.jpg")

        path, ctx = resolve_wallpaper_path(config)

        assert path is not None
        assert path.exists()
        assert ctx is not None
        ctx.__exit__(None, None, None)