using AutoMapper;
using MediatR;
using mws.backend.dotnet.application.Common;
using mws.backend.dotnet.application.Permissions;

namespace mws.backend.dotnet.application.Users;

public record GetUsersQuery(Guid ActorUserId, UserListFilter Filter, int Page, int PageSize) : IRequest<PagedResult<UserDto>>;

public class GetUsersHandler(IUnitOfWork uow, IPermissionService permissions, IMapper mapper)
    : IRequestHandler<GetUsersQuery, PagedResult<UserDto>>
{
    private const string Screen = "users";

    public async Task<PagedResult<UserDto>> Handle(GetUsersQuery query, CancellationToken ct)
    {
        await permissions.EnsureAsync(query.ActorUserId, Screen, PermissionAction.View, ct);

        var users = await uow.Users.SearchWithRolePagedAsync(query.Filter, query.Page, query.PageSize, ct);
        return new PagedResult<UserDto>
        {
            Items = mapper.Map<List<UserDto>>(users.Items),
            TotalCount = users.TotalCount,
            Page = users.Page,
            PageSize = users.PageSize,
        };
    }
}