using Indotalent.ConfigBackEnd.Exceptions;
using Indotalent.ConfigBackEnd.Extensions;
using Indotalent.Infrastructure.Database;
using MediatR;
using Microsoft.EntityFrameworkCore;

namespace Indotalent.Features.Payroll.Deduction.Cqrs;

public class CreateDeductionRequest
{
    public string? Code { get; set; }
    public string? Name { get; set; }
    public string? Description { get; set; }
    public string? Category { get; set; }
    public bool PreTax { get; set; }
    public string? CalculationMethod { get; set; }
    public string? Status { get; set; } = "Active";
}

public class CreateDeductionResponse
{
    public string? Id { get; set; }
    public string? Code { get; set; }
}

public record CreateDeductionCommand(CreateDeductionRequest Data) : IRequest<CreateDeductionResponse>;

public class CreateDeductionHandler : IRequestHandler<CreateDeductionCommand, CreateDeductionResponse>
{
    private readonly AppDbContext _context;

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

    public async Task<CreateDeductionResponse> Handle(CreateDeductionCommand request, CancellationToken cancellationToken)
    {
        var isExists = await _context.Deduction
            .AnyAsync(x => x.Code == request.Data.Code, cancellationToken);

        if (isExists)
        {
            throw new AlreadyExistsException("Deduction Component", request.Data.Code ?? string.Empty);
        }

        var entityName = nameof(Data.Entities.Deduction);

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

        var entity = new Data.Entities.Deduction
        {
            AutoNumber = autoNo,
            Code = request.Data.Code,
            Name = request.Data.Name,
            Description = request.Data.Description,
            Category = request.Data.Category,
            PreTax = request.Data.PreTax,
            CalculationMethod = request.Data.CalculationMethod,
            Status = request.Data.Status
        };

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

        return new CreateDeductionResponse
        {
            Id = entity.Id,
            Code = entity.Code
        };
    }
}