using Indotalent.ConfigBackEnd.Extensions;
using Indotalent.Infrastructure.Database;
using MediatR;

namespace Indotalent.Features.Performance.Promotion.Cqrs;

public class CreatePromotionRequest
{
    public string EmployeeId { get; set; } = string.Empty;
    public string FromGrade { get; set; } = string.Empty;
    public string ToGrade { get; set; } = string.Empty;
    public DateTime? EffectiveDate { get; set; }
    public string PromotionNote { get; set; } = string.Empty;
    public string Status { get; set; } = string.Empty;
}

public class CreatePromotionResponse
{
    public string? Id { get; set; }
    public string? AutoNumber { get; set; }
}

public record CreatePromotionCommand(CreatePromotionRequest Data) : IRequest<CreatePromotionResponse>;

public class CreatePromotionHandler : IRequestHandler<CreatePromotionCommand, CreatePromotionResponse>
{
    private readonly AppDbContext _context;

    public CreatePromotionHandler(AppDbContext context) => _context = context;

    public async Task<CreatePromotionResponse> Handle(CreatePromotionCommand request, CancellationToken cancellationToken)
    {
        var entityName = nameof(Data.Entities.Promotion);

        var autoNo = await _context.GenerateAutoNumberAsync(
            entityName: entityName,
            prefixTemplate: $"{entityName.ToShortNameConsonant(3)}/{{Year}}/",
            ct: cancellationToken
        );

        var entity = new Data.Entities.Promotion
        {
            AutoNumber = autoNo,
            EmployeeId = request.Data.EmployeeId,
            FromGrade = request.Data.FromGrade,
            ToGrade = request.Data.ToGrade,
            EffectiveDate = request.Data.EffectiveDate,
            PromotionNote = request.Data.PromotionNote,
            Status = request.Data.Status
        };

        _context.Promotion.Add(entity);
        await _context.SaveChangesAsync(cancellationToken);

        return new CreatePromotionResponse
        {
            Id = entity.Id,
            AutoNumber = entity.AutoNumber
        };
    }
}