import os
import subprocess
from pathlib import Path
from .moviepy_renderer import MoviePyRenderer
from .base_renderer import BaseRenderer, RendererInput


class RustRenderer(BaseRenderer):
    def __init__(self):
        self.rust_bin = self._find_rust_bin()
        self.fallback = MoviePyRenderer()

    def _find_rust_bin(self):
        patterns = [
            Path("target/debug/darkmedia-x"),
            Path("target/release/darkmedia-x"),
            Path("../../engine/target/debug/darkmedia-x"),
            Path("../../engine/target/release/darkmedia-x"),
        ]
        for p in patterns:
            if p.exists():
                return p
        return None

    def is_available(self):
        return self.rust_bin is not None and self.rust_bin.exists()

    def render(self, input_data: RendererInput) -> bool:
        if not self.is_available():
            print("   ⚠️ Rust binaire non trouvé, fallback MoviePy")
            return self.fallback.render(input_data)

        story_dir = input_data.output_path.parent
        story_name = story_dir.name if story_dir else "unknown"

        env = os.environ.copy()
        env["SELECTED_STORY"] = story_name

        try:
            result = subprocess.run(
                [str(self.rust_bin)],
                env=env,
                cwd=story_dir.parent if story_dir else Path.cwd(),
                capture_output=True,
                text=True,
                timeout=600
            )
            if result.returncode == 0:
                output_video = story_dir / "final_video.mp4"
                if output_video.exists():
                    print(f"   ✅ Vidéo générée par Rust: {output_video.name}")
                    return True
        except Exception as e:
            print(f"   ⚠️ Erreur Rust: {e}")

        print("   ⚠️ Échec Rust, fallback MoviePy")
        return self.fallback.render(input_data)