"""Cached platform constraints shared by SUPER authoring and generic execution."""

from fastapi import HTTPException

from ..catalog.research_metadata import ResearchMetadata


async def validate_settings(db, values):
    """Reject known unsupported values; absent metadata is explicitly unknown, never approved."""
    snapshot = await ResearchMetadata(db).get("settings")
    rows = snapshot["content"].get("items", [])
    if not snapshot["fetched_at"] or not rows:
        return {"status": "unknown", "reason": "未缓存平台设置"}
    incomplete = False
    for settings in values:
        value = settings.model_dump() if hasattr(settings, "model_dump") else settings
        matches = [r for r in rows if all(r.get(k) == value.get(v) for k, v in (
            ("instrument_type", "instrumentType"), ("region", "region"), ("universe", "universe"), ("delay", "delay")))]
        if not matches:
            raise HTTPException(422, "平台设置快照不支持当前 SUPER 地区 / Universe / Delay 组合")
        failures = []
        valid = False
        for row in matches:
            failed = []
            if row.get("neutralizations") and value["neutralization"] not in row["neutralizations"]:
                failed.append("neutralization")
            for key, field in row.get("fields", {}).items():
                if key not in value:
                    continue
                current = value[key]
                if "choices" in field and current not in field["choices"]:
                    failed.append(key)
                if type(current) in (int, float) and (
                    ("minimum" in field and current < field["minimum"]) or
                    ("maximum" in field and current > field["maximum"])):
                    failed.append(key)
            if not failed:
                valid = True
                incomplete |= any(not row.get("fields", {}).get(key) for key in ("selectionLimit", "selectionHandling", "componentActivation"))
                break
            failures.extend(failed)
        if not valid:
            raise HTTPException(422, "平台设置快照不支持 SUPER 参数：" + "、".join(sorted(set(failures))))
    return {"status": "partial" if incomplete else "cached", "fetched_at": snapshot["fetched_at"],
            "reason": "部分 SUPER 设置范围未提供" if incomplete else "仅按缓存校验，仍需平台执行验证"}