"""Export saved Blender files in a separate process, then import them in UE."""
from pathlib import Path
import subprocess

from .paths import PROJECT, executable, slug


def export(filename, name="Character", collection="Character", blender=None):
    source = Path(filename).resolve()
    if not source.is_file() or source.suffix.lower() != ".blend":
        raise FileNotFoundError(f"Brak pliku .blend: {source}")
    destination = PROJECT / "build" / slug(name) / (name + ".glb")
    destination.parent.mkdir(parents=True, exist_ok=True)
    command = [executable("blender", blender), "--background", str(source),
               "--python-exit-code", "1", "--python", str(PROJECT / "tools" / "blender_export.py"),
               "--", "--output", str(destination), "--collection", collection]
    result = subprocess.run(command, capture_output=True, text=True, timeout=180)
    if result.returncode or not destination.is_file():
        raise RuntimeError("Eksport Blendera nie powiodl sie:\n" + (result.stdout + result.stderr)[-6000:])
    return destination


def import_character(filename, name="Character", collection="Character", blender=None):
    from .assets import import_model
    return import_model(export(filename, name, collection, blender), name)