using LiteCharms.Extensions;
using LiteCharms.Infrastructure.Database;
using LiteCharms.Models;

namespace LiteCharms.Features.CartPackages.Queries.Handlers;

public class GetPackagesQueryHandler(IDbContextFactory<ShopDbContext> contextFactory) : IRequestHandler<GetPackagesQuery, Result<Package[]>>
{
    public async ValueTask<Result<Package[]>> Handle(GetPackagesQuery request, CancellationToken cancellationToken)
    {
        try
        {
            var fromDate = request.From.ToDateTime(TimeOnly.MinValue);
            var toDate = request.To.ToDateTime(TimeOnly.MaxValue);

            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);

            var packages = await context.Packages
                .AsNoTracking()
                .OrderByDescending(o => o.CreatedAt)
                .Where(p => p.CreatedAt >= fromDate && p.CreatedAt <= toDate)
                .Where(p => p.Active == request.Active)
                .Take(request.MaxRecords)
                .ToArrayAsync(cancellationToken);

            return packages?.Length > 0
                ? Result.Ok(packages.Select(o => o.ToModel()).ToArray())
                : Result.Fail<Package[]>(new Error($"No packages found for the specified date range {request.From} - {request.To}."));
        }
        catch (Exception ex)
        {
            return Result.Fail<Package[]>(new Error(ex.Message).CausedBy(ex));
        }
    }
}