using Microsoft.EntityFrameworkCore;
using PnvPanel.Application.Common.Interfaces;
using PnvPanel.Application.Common.Messaging;
using PnvPanel.Application.Common.Models;
using PnvPanel.Domain.Billing;

namespace PnvPanel.Application.Admin.Billing;

public sealed class GetBillingSettingsQueryHandler(IAppDbContext dbContext)
    : IQueryHandler<GetBillingSettingsQuery, Result<BillingSettingsDto>>
{
    public async Task<Result<BillingSettingsDto>> Handle(
        GetBillingSettingsQuery query,
        CancellationToken cancellationToken
    )
    {
        var settings = await dbContext
            .BillingSettings.AsNoTracking()
            .FirstOrDefaultAsync(cancellationToken);

        // Ещё не сохранялось ни разу — отдаём дефолты, а не ошибку (см. PricingSettings).
        return Result.Success(
            settings is null
                ? new BillingSettingsDto(string.Empty, BillingSettings.DefaultGraceDays, false)
                : BillingSettingsDto.FromDomain(settings)
        );
    }
}