using System.IO;
using AGEHAB.RelatorioSeadIpasgo.Application.Abstractions;
using AGEHAB.RelatorioSeadIpasgo.Application.DTOs;
using AGEHAB.RelatorioSeadIpasgo.Domain.Services;

namespace AGEHAB.RelatorioSeadIpasgo.Application.UseCases;

public class GerarRelatorioUseCase
{
    private readonly IRelatorioRepository _repository;
    private readonly IIpasgoFiltroService _filtroIpasgoService;
    private readonly IExcelRelatorioWriter _excelWriter;
    private readonly IIpasgoZipWriter _zipWriter;

    public GerarRelatorioUseCase(
        IRelatorioRepository repository,
        IIpasgoFiltroService filtroIpasgoService,
        IExcelRelatorioWriter excelWriter,
        IIpasgoZipWriter zipWriter)
    {
        _repository = repository;
        _filtroIpasgoService = filtroIpasgoService;
        _excelWriter = excelWriter;
        _zipWriter = zipWriter;
    }

    public async Task ExecutarAsync(GerarRelatorioRequest request, CancellationToken cancellationToken)
    {
        cancellationToken.ThrowIfCancellationRequested();
        GarantirDiretorio(request.ExcelPath);

        var linhas = await _repository.ObterRelatorioAsync(request.Competencia.Handle, request.TipoCalculo.Valor, cancellationToken);
        cancellationToken.ThrowIfCancellationRequested();

        if (request.Relatorio.EhIpasgo)
        {
            if (string.IsNullOrWhiteSpace(request.ZipPath))
            {
                throw new InvalidOperationException("Escolha onde salvar o ZIP do IPASGO.");
            }

            GarantirDiretorio(request.ZipPath);
            linhas = _filtroIpasgoService.Filtrar(linhas);
            cancellationToken.ThrowIfCancellationRequested();
            SubstituirArquivo(request.ZipPath);
            _zipWriter.Escrever(request.Competencia.Referencia, linhas, request.ZipPath, cancellationToken);
        }

        cancellationToken.ThrowIfCancellationRequested();
        SubstituirArquivo(request.ExcelPath);
        _excelWriter.Escrever(request.Relatorio.TituloExcel, linhas, request.ExcelPath, cancellationToken);
    }

    private static void GarantirDiretorio(string filePath)
    {
        var diretorio = Path.GetDirectoryName(filePath);

        if (!string.IsNullOrWhiteSpace(diretorio) && !Directory.Exists(diretorio))
        {
            Directory.CreateDirectory(diretorio);
        }
    }

    private static void SubstituirArquivo(string filePath)
    {
        if (File.Exists(filePath))
        {
            File.Delete(filePath);
        }
    }
}