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"""Export self-contained oracle projects for benchmark verification only."""

from pathlib import Path

from ..catalog import FAMILIES
from ..protocol import TIERS


def export_reference(family, tier, destination):
    f = FAMILIES[family]
    root = Path(destination)
    root.mkdir(parents=True, exist_ok=True)
    path = root / "main.py"
    if path.exists():
        raise FileExistsError(f"Refusing to overwrite {path}")
    here = Path(__file__).parent
    domain = (
        (here / "domains.py")
        .read_text(encoding="utf-8")
        .replace("from __future__ import annotations", "")
    )
    service = (here / "service.py").read_text(encoding="utf-8")
    for line in (
        "from __future__ import annotations",
        "from klein_code_bench.catalog import FAMILIES",
        "from klein_code_bench.protocol import TIERS",
        "from klein_code_bench.reference.domains import solve",
    ):
        service = service.replace(line, "")
    header = f"from types import SimpleNamespace\nTIERS = {TIERS!r}\nFAMILIES = {{{family!r}: SimpleNamespace(slug={family!r}, required={f.required!r})}}\n"
    main = f"""
if __name__ == '__main__':
    import argparse
    import sys
    parser = argparse.ArgumentParser()
    parser.add_argument('--state-dir', required={tier == "max"!r})
    args = parser.parse_args()
    service = Service({family!r}, {tier!r}, args.state_dir)
    for line in sys.stdin:
        try:
            def reject_constant(value):
                raise ValueError(value)
            request = json.loads(line, parse_constant=reject_constant)
        except ValueError:
            response = {{'ok': False, 'error': 'invalid_request'}}
        else:
            response = service.request(request)
        print(json.dumps(response, ensure_ascii=True, allow_nan=False), flush=True)
"""
    path.write_text(
        domain + "\n" + header + "\n" + service + "\n" + main, encoding="utf-8"
    )
    return path