# economic_service.py

from typing import Dict

def harmonize(
    commodity: str,
    physical_anchor: float,
    reporting_lag: int,
) -> Dict:
    """
    Deterministic economic harmonization function.
    """

    lag_factor = 1.0 + (reporting_lag * 0.005)
    synthetic_index = physical_anchor / lag_factor

    confidence = max(
        0.0,
        min(
            1.0,
            1.0 - abs(physical_anchor - synthetic_index)
            / (physical_anchor + 1e-9),
        ),
    )

    return {
        "commodity": commodity,
        "physical_anchor": physical_anchor,
        "reporting_lag_days": reporting_lag,
        "synthetic_index": round(synthetic_index, 4),
        "confidence": round(confidence, 4),
    }