import argparse
import json
import os
import subprocess
import sys
from pathlib import Path

ROOT = Path(__file__).resolve().parents[3]
VENDOR = ROOT / "vendor" / "hunyuan3d-mlx"

ap = argparse.ArgumentParser()
ap.add_argument("--input", action="append", default=[])
ap.add_argument("--outdir", required=True)
ap.add_argument("--params", default="{}")
a = ap.parse_args()
p = json.loads(a.params)

if not a.input:
    print("ERROR: no input image")
    sys.exit(1)
if not (VENDOR / "generate_e2e.py").exists():
    print(f"ERROR: hunyuan3d-mlx not installed at {VENDOR}. Run scripts/install_hunyuan3d_mlx.sh")
    sys.exit(1)

outdir = Path(a.outdir)
out_stem = outdir / f"hunyuan3d_{Path(a.input[0]).stem}"

cmd = [
    sys.executable, "generate_e2e.py", str(Path(a.input[0]).resolve()),
    "--output", str(out_stem.resolve()),
    "--steps", str(p.get("steps", 50)),
    "--guidance", str(p.get("guidance_scale", 7.5)),
    "--octree-resolution", str(p.get("octree_resolution", 384)),
    "--texture-size", str(p.get("texture_size", 4096)),
    "--remesh-faces", str(p.get("remesh_faces", 120000)),
    "--max-num-view", str(p.get("max_num_view", 6)),
    "--seed", str(p.get("seed", 42)),
]
if p.get("no_texture"):
    cmd.append("--no-texture")

env = os.environ.copy()
# xet chunked downloader fails on some HF repos — force the reliable HTTP path
# (same fix as trellis_mac / flux_local).
env["HF_HUB_DISABLE_XET"] = "1"
# guard the torch + compiled-kernel OpenMP collision like sf3d / trellis_mac.
env["KMP_DUPLICATE_LIB_OK"] = "TRUE"
env.setdefault("OMP_NUM_THREADS", "1")
env.setdefault("MKL_NUM_THREADS", "1")

print("+", " ".join(cmd), flush=True)
print("(first run downloads ~15GB MLX weights: dgrauet/hunyuan3d-2.1-mlx)", flush=True)
res = subprocess.run(cmd, cwd=str(VENDOR), stdout=sys.stdout, stderr=subprocess.STDOUT, env=env)
if res.returncode != 0:
    sys.exit(res.returncode)

# generate_e2e.py writes <stem>.glb (textured, or geometry if --no-texture) and
# optionally <stem>_shape.glb. Prefer the primary <stem>.glb.
final = out_stem.with_suffix(".glb")
if final.exists():
    chosen = final
else:
    glbs = sorted(outdir.rglob("*.glb"))
    if not glbs:
        print("ERROR: hunyuan3d_mlx produced no .glb")
        sys.exit(1)
    chosen = glbs[0]

outputs = [{"path": str(chosen), "name": f"hunyuan3d_{Path(a.input[0]).stem}.glb",
            "meta": {"tool": "hunyuan3d_mlx"}}]
(outdir / "result.json").write_text(json.dumps({"outputs": outputs}))
print("done:", chosen, flush=True)