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

namespace Indotalent.Features.Organization.Department.Cqrs;

public class CreateDepartmentRequest
{
    public string? CostCenter { get; set; }
    public string? Name { get; set; }
    public string? Description { get; set; }
    public string HeadOfDeptartment { get; set; } = string.Empty;
    public string OtherInformation1 { get; set; } = string.Empty;
    public string OtherInformation2 { get; set; } = string.Empty;
    public string OtherInformation3 { get; set; } = string.Empty;
}

public class CreateDepartmentResponse
{
    public string? Id { get; set; }
    public string? CostCenter { get; set; }
}

public record CreateDepartmentCommand(CreateDepartmentRequest Data) : IRequest<CreateDepartmentResponse>;

public class CreateDepartmentHandler : IRequestHandler<CreateDepartmentCommand, CreateDepartmentResponse>
{
    private readonly AppDbContext _context;

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

    public async Task<CreateDepartmentResponse> Handle(CreateDepartmentCommand request, CancellationToken cancellationToken)
    {
        var isExists = await _context.Department
            .AnyAsync(x => x.CostCenter == request.Data.CostCenter, cancellationToken);

        if (isExists)
        {
            throw new AlreadyExistsException("Department", request.Data.CostCenter ?? string.Empty);
        }

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

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

        var entity = new Data.Entities.Department
        {
            AutoNumber = autoNo,
            CostCenter = request.Data.CostCenter,
            Name = request.Data.Name,
            Description = request.Data.Description,
            HeadOfDeptartment = request.Data.HeadOfDeptartment,
            OtherInformation1 = request.Data.OtherInformation1,
            OtherInformation2 = request.Data.OtherInformation2,
            OtherInformation3 = request.Data.OtherInformation3
        };

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

        return new CreateDepartmentResponse
        {
            Id = entity.Id,
            CostCenter = entity.CostCenter
        };
    }
}