using JetBrains.Annotations;
using OpenCvSharp;

namespace StitchATon.DTO;

public class GenerateInput
{
  public required string CanvasRect { get; [UsedImplicitly] init; }
  public required float[] CropOffset { get; [UsedImplicitly] init; }
  public required float[] CropSize { get; [UsedImplicitly] init; }
  public required float OutputScale { get; [UsedImplicitly] init; }

  public Rect ParsedCanvasRect()
  {
    var corners = CanvasRect.Split( ":" );
    var c1 = ParseCanvasCoord( corners[0] );
    var c2 = ParseCanvasCoord( corners[1] );

    return new Rect(
      int.Min( c1.X, c2.X ),
      int.Min( c1.Y, c2.Y ),
      int.Abs( c1.X - c2.X ) + 1, // Inclusive bbox
      int.Abs( c1.Y - c2.Y ) + 1 // Inclusive bbox
    );
  }

  private Point ParseCanvasCoord(string labwareCoord)
  {
    int y = 0;
    int x = 0;
    foreach( var c in labwareCoord )
    {
      if( 'A' <= c && c <= 'Z' )
        y = ( y * 26 ) + ( c - 'A' + 1);
      else
        x = ( x * 10 ) + ( c - '0' );
    }

    y--;
    x--;

    return new(x, y);
  }
  
  public Point2f ParsedCropOffset() => new( CropOffset[0], CropOffset[1] );
  
  public Point2f ParsedCropSize() => new( CropSize[0], CropSize[1] );
}