import sys
import argparse
import torch
import torch.optim
from pathlib import Path

sys.path.append(str(Path(__file__).absolute().parent.parent))

from utils import netio
import model

parser = argparse.ArgumentParser()
parser.add_argument('--batch-size', type=str,
                    help='Resolution')
parser.add_argument('--outdir', type=str, default='onnx',
                    help='Output directory')
parser.add_argument('model', type=str,
                    help='Path of model to export')
opt = parser.parse_args()


with torch.inference_mode():
    states, model_path = netio.load_checkpoint(opt.model)
    batch_size = opt.batch_size and eval(opt.batch_size)
    out_dir = model_path.parent / opt.outdir

    model.deserialize(states).eval().export_onnx(out_dir, batch_size)

    print(f'Model exported to {out_dir}')