namespace StellaOps.Evidence.Budgets;

public sealed partial class EvidenceBudgetService
{
    public async Task<BudgetStatus> GetBudgetStatusAsync(Guid scanId, CancellationToken ct)
    {
        var budget = _options.CurrentValue;
        var usage = await GetCurrentUsageAsync(scanId, ct).ConfigureAwait(false);

        return new BudgetStatus
        {
            ScanId = scanId,
            TotalBudgetBytes = budget.MaxScanSizeBytes,
            UsedBytes = usage.TotalBytes,
            RemainingBytes = Math.Max(0, budget.MaxScanSizeBytes - usage.TotalBytes),
            UtilizationPercent = (decimal)usage.TotalBytes / budget.MaxScanSizeBytes * 100,
            ByType = usage.ByType.ToDictionary(
                kvp => kvp.Key,
                kvp => new TypeBudgetStatus
                {
                    Type = kvp.Key,
                    UsedBytes = kvp.Value,
                    LimitBytes = budget.MaxPerType.GetValueOrDefault(kvp.Key),
                    UtilizationPercent = budget.MaxPerType.TryGetValue(kvp.Key, out var limit)
                        ? (decimal)kvp.Value / limit * 100
                        : 0
                })
        };
    }
}