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"""Command-line smoke evaluator for the shared block diffusion sampler."""

from __future__ import annotations

import argparse
import json
from pathlib import Path

from .core import BlockDiffusionConfig, SAMPLERS, ToyMaskedLMAdapter
from .metrics import summarize_result


def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--method", choices=sorted(SAMPLERS), default="confidence")
    parser.add_argument("--steps", type=int, default=8)
    parser.add_argument("--block-size", type=int, default=16)
    parser.add_argument("--num-blocks", type=int, default=1)
    parser.add_argument("--remask-ratio", type=float, default=0.5)
    parser.add_argument("--use-cache", action="store_true")
    parser.add_argument("--output", type=Path)
    args = parser.parse_args()

    config = BlockDiffusionConfig(
        block_size=args.block_size,
        num_blocks=args.num_blocks,
        steps=args.steps,
        remask_ratio=args.remask_ratio,
        use_cache=args.use_cache,
    )
    adapter = ToyMaskedLMAdapter(vocab_size=config.vocab_size, mask_token_id=config.mask_token_id)
    sampler = SAMPLERS[args.method](adapter, config)
    result = sampler.decode()
    summary = summarize_result(result)
    text = json.dumps(summary, indent=2, ensure_ascii=False)
    if args.output:
        args.output.parent.mkdir(parents=True, exist_ok=True)
        args.output.write_text(text + "\n", encoding="utf-8")
    print(text)
    return 0


if __name__ == "__main__":
    raise SystemExit(main())