using System;
using System.Text;

namespace HanvonF710XAttendanceService
{
  internal static class NedoTemplateConverterTests
  {
    private const string SampleJpegBase64 =
        "/9j/4AAQSkZJRgABAQEAOABkAAD/2wBDAA0JCgsKCA0LCgsODg0PEyAVExISEyccHhcgLikxMC4pLSwzOko+MzZGNywtQFdBRkxOUlNSMj5aYVpQYEpRUk//2wBDAQ4ODhMREyYVFSZPNS01T09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0//wAARCACgAHgDASIAAhEBAxEB/8QAFQABAQAAAAAAAAAAAAAAAAAAAAb/xAAUEAEAAAAAAAAAAAAAAAAAAAAA/9oADAMBAAIQAxAAAAGfAP/Z";

    public static int RunAll()
    {
      int failed = 0;
      failed += Run("1 detect NEDO XML", TestDetectNedoXml);
      failed += Run("2 extract valid NEDO photo", TestExtractValidNedoPhoto);
      failed += Run("3 missing NEDO photo", TestMissingNedoPhoto);
      failed += Run("4 invalid NEDO photo", TestInvalidNedoPhoto);
      failed += Run("5 NEDO plan uses face not record", TestNedoPlanUsesFace);
      failed += Run("6 Hanvon-native template uses record", TestHanvonNativeUsesRecord);
      failed += Run("7 NEDO plan uses profile verification", TestNedoUsesProfileVerification);
      failed += Run("8 employee 5 style NEDO blob", TestEmployee5StyleBlob);
      failed += Run("9 prepare upscales small NEDO photo", TestPrepareUpscalesSmallPhoto);
      return failed;
    }

    private static int Run(string name, Func<bool> test)
    {
      try
      {
        if (!test())
        {
          Console.WriteLine("FAIL: " + name);
          return 1;
        }

        Console.WriteLine("PASS: " + name);
        return 0;
      }
      catch (Exception ex)
      {
        Console.WriteLine("FAIL: " + name + " err=" + ex.Message);
        return 1;
      }
    }

    private static bool TestDetectNedoXml()
    {
      string xml = BuildNedoXml("5", SampleJpegBase64);
      return NedoTemplateConverter.IsNedoXml(xml);
    }

    private static bool TestExtractValidNedoPhoto()
    {
      string xml = BuildNedoXml("5", SampleJpegBase64);
      NedoPhotoExtractResult result = NedoTemplateConverter.TryExtractPhoto(xml, out string photo);
      return result == NedoPhotoExtractResult.Found
          && photo == SampleJpegBase64
          && NedoTemplateConverter.GetDecodedJpegByteLength(photo) > 0;
    }

    private static bool TestMissingNedoPhoto()
    {
      string xml = "id=\"5\" name=\"\" check_type=\"face\" face_data=\"abc\"";
      NedoPhotoExtractResult result = NedoTemplateConverter.TryExtractPhoto(xml, out string photo);
      return result == NedoPhotoExtractResult.Missing && photo == null;
    }

    private static bool TestInvalidNedoPhoto()
    {
      string xml = BuildNedoXml("5", "not-valid-base64!!!");
      NedoPhotoExtractResult result = NedoTemplateConverter.TryExtractPhoto(xml, out string photo);
      return result == NedoPhotoExtractResult.Invalid && photo == null;
    }

    private static bool TestNedoPlanUsesFace()
    {
      string xml = BuildNedoXml("5", SampleJpegBase64);
      var plan = DbToDeviceUploadPlan.FromBlob(Encoding.UTF8.GetBytes(xml));
      return plan.Format == DbToDeviceTemplateFormat.NedoXml
          && NedoTemplateConverter.UsesFaceField(plan)
          && !NedoTemplateConverter.UsesRecordField(plan);
    }

    private static bool TestHanvonNativeUsesRecord()
    {
      string record = Convert.ToBase64String(new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06 });
      var plan = DbToDeviceUploadPlan.FromBlob(Encoding.UTF8.GetBytes(record));
      return plan.Format == DbToDeviceTemplateFormat.HanvonRecord
          && NedoTemplateConverter.UsesRecordField(plan)
          && !NedoTemplateConverter.UsesFaceField(plan);
    }

    private static bool TestNedoUsesProfileVerification()
    {
      string xml = BuildNedoXml("5", SampleJpegBase64);
      var plan = DbToDeviceUploadPlan.FromBlob(Encoding.UTF8.GetBytes(xml));
      return plan.UseProfileVerification;
    }

    private static bool TestEmployee5StyleBlob()
    {
      string xml = "id=\"5\" name=\"\" authority=\"0X11\" card_num=\"0Xffffffff\" calid=\"0\" check_type=\"face\" opendoor_type=\"face\" password=\"\" alg_edition=\"3.1\" sn=\"6753718120000147\"photo=\"" + SampleJpegBase64 + "\"face_data=\"abc\"";
      var plan = DbToDeviceUploadPlan.FromBlob(Encoding.UTF8.GetBytes(xml));
      return plan.Format == DbToDeviceTemplateFormat.NedoXml
          && plan.HasUploadPayload
          && plan.NedoPhotoStatus == NedoPhotoExtractResult.Found;
    }

    private static bool TestPrepareUpscalesSmallPhoto()
    {
      var plan = DbToDeviceUploadPlan.FromBlob(Encoding.UTF8.GetBytes(BuildNedoXml("5", SampleJpegBase64)));
      if (!plan.TryPrepareFacePayload(out string error))
      {
        return false;
      }

      return string.Equals(plan.PrepareNote, "upscaled", StringComparison.OrdinalIgnoreCase)
          && plan.PreparedWidth >= NedoPhotoPreprocessor.DefaultMinShortSide
          && plan.PreparedHeight >= NedoPhotoPreprocessor.DefaultMinShortSide;
    }

    private static string BuildNedoXml(string id, string photo)
    {
      return "id=\"" + id + "\" name=\"\" check_type=\"face\" photo=\"" + photo + "\" face_data=\"biometric-not-used\"";
    }
  }
}