from __future__ import annotations

from app.core.config import settings


def document_storage_statistics() -> dict[str, int | float]:
    root = settings.upload_path
    used_bytes = 0
    if root.exists():
        for path in root.rglob("*"):
            try:
                if path.is_file():
                    used_bytes += path.stat().st_size
            except OSError:
                continue
    capacity_bytes = max(
        1,
        int(float(settings.storage_capacity_gb) * 1024**3),
    )
    usage_percent = min(used_bytes / capacity_bytes * 100, 100.0)
    return {
        "storage_used_bytes": used_bytes,
        "storage_capacity_bytes": capacity_bytes,
        "storage_usage_percent": round(usage_percent, 1),
    }