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

namespace mws.backend.dotnet.application.Projects;

public record UpdateProjectCommand(Guid UserId, Guid ProjectId, UpdateProjectRequest Request) : IRequest<ProjectDto>, IAuditableRequest
{
    public string Action => "Project.Update";
    public string EntityType => "Project";
    public Guid? EntityId => ProjectId;
    public string? EntityName => Request.Name;
}

public class UpdateProjectHandler(IUnitOfWork uow, IMapper mapper, IPermissionService permissions) : IRequestHandler<UpdateProjectCommand, ProjectDto>
{
    public async Task<ProjectDto> Handle(UpdateProjectCommand command, CancellationToken ct)
    {
        await permissions.EnsureAsync(command.UserId, "projects", PermissionAction.Edit, ct);

        var project = await ProjectAccess.GetForUserOrThrowAsync(uow, command.UserId, command.ProjectId, ct);

        var request = command.Request;
        if (string.IsNullOrWhiteSpace(request.Name))
        {
            throw new BadRequestException("Project name is required");
        }

        project.Name = request.Name.Trim();
        project.Description = request.Description;
        project.Status = request.Status;
        project.UpdatedBy = command.UserId;
        project.UpdatedAt = DateTime.UtcNow;

        await uow.SaveChangesAsync(ct);
        return mapper.Map<ProjectDto>(project);
    }
}