import json
from fastapi import APIRouter
from app.config import LOG_DIR

router = APIRouter()


@router.get("")
async def list_reports():
    """List all daily detection reports with summaries."""
    reports = []
    for path in sorted(LOG_DIR.glob("report_*.json"), reverse=True):
        try:
            with open(path) as f:
                data = json.load(f)
            iso_count = len(data.get("isotopes_detected", []))
            reports.append({
                "date": data.get("date", ""),
                "live_time_hours": data.get("live_time_hours", 0),
                "total_counts": data.get("total_counts", 0),
                "cps_mean": data.get("cps_mean", 0),
                "background_subtracted": data.get("background_subtracted", False),
                "isotope_count": iso_count,
                "isotopes": [i["isotope"] for i in data.get("isotopes_detected", [])],
            })
        except (json.JSONDecodeError, OSError):
            continue
    return reports


@router.get("/{date}")
async def get_report(date: str):
    """Get a specific day's full report."""
    report_path = LOG_DIR / f"report_{date}.json"
    if not report_path.exists():
        from fastapi import HTTPException
        raise HTTPException(status_code=404, detail=f"No report for {date}")

    try:
        with open(report_path) as f:
            data = json.load(f)
    except (json.JSONDecodeError, OSError):
        raise HTTPException(status_code=500, detail="Report file corrupt")

    return data