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

namespace mws.backend.dotnet.application.Projects;

public record CreateProjectCommand(Guid UserId, CreateProjectRequest Request) : IRequest<ProjectDto>;

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

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

        var now = DateTime.UtcNow;
        var project = new Project
        {
            Id = Guid.NewGuid(),
            Name = request.Name.Trim(),
            Description = request.Description,
            Status = ProjectStatus.Active,
            CreatedBy = command.UserId,
            CreatedAt = now,
            UpdatedBy = command.UserId,
            UpdatedAt = now,
        };

        project.Members.Add(new ProjectMember
        {
            ProjectId = project.Id,
            UserId = command.UserId,
            Role = MemberRole.Owner,
        });

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