using Hutopy.Application.Common.Interfaces;

namespace Hutopy.Application.Users.Queries.GetCurrentUser;

public record GetCurrentUserQuery : IRequest<UserDto>;

public class GetCurrentUserQueryHandler(
    IApplicationDbContext context,
    IMapper mapper,
    IIdentityService identityService
)
    : IRequestHandler<GetCurrentUserQuery, UserDto>
{
    public async Task<UserDto> Handle(GetCurrentUserQuery request, CancellationToken cancellationToken)
    {
        var identityUser = await identityService.GetCurrentUserAsync();
        var currentUserId = Guid.Parse(identityUser!.Id!);

        var transactions = await context.UserTransactions
            .Where(x => x.ApplicationUserId == currentUserId.ToString())
            .OrderBy(x => x.LastModified)
            .ProjectTo<UserTransactionDto>(mapper.ConfigurationProvider)
            .Where(x => x.IsConfirmed == true)
            .ToListAsync(cancellationToken);

        var roles = await identityService.GetCurrentUserRolesAsync();

        var user = new UserDto
        {
            Id = currentUserId,
            FirstName = identityUser?.FirstName ?? "",
            LastName = identityUser?.LastName ?? "",
            UserName = identityUser?.UserName ?? "",
            UserTransactions = transactions,
            TotalBalance = transactions.Sum(x => x.Amount),
            UserRoles = roles
        };

        return user;
    }
}