"""Shared helpers for integration tests."""

from __future__ import annotations

import shutil
import subprocess
import tempfile
from pathlib import Path

from tests.conftest import make_png


def has_darktable_style(style_name: str, config_dir: Path | None = None) -> bool:
    """Return True if darktable-cli can apply ``style_name`` to a tiny PNG."""
    if not shutil.which("darktable-cli"):
        return False

    config = config_dir or Path.home() / ".config" / "darktable"
    styles_dir = config / "styles"
    if not styles_dir.is_dir():
        return False
    if not any(p.stem == style_name for p in styles_dir.glob("*.dtstyle")):
        return False

    with tempfile.TemporaryDirectory() as tmp:
        tmp_path = Path(tmp)
        src = tmp_path / "probe.png"
        out_dir = tmp_path / "out"
        out_dir.mkdir()
        make_png(src)
        cmd = [
            "darktable-cli",
            str(src),
            str(out_dir),
            "--style",
            style_name,
            "--out-ext",
            "png",
            "--style-overwrite",
            "--core",
            "--configdir",
            str(config),
        ]
        result = subprocess.run(cmd, capture_output=True, text=True)
        if result.returncode != 0:
            return False
        return any(out_dir.iterdir())


def has_workflow_tools() -> bool:
    """True when rembg, gmic, ImageMagick, and darktable-cli are on PATH."""
    has_magick = bool(shutil.which("magick") or shutil.which("convert"))
    return all(shutil.which(name) for name in ("rembg", "gmic", "darktable-cli")) and has_magick