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package com.foreach.imageserver.dto;

import lombok.*;

import java.util.Objects;

/**
 * Source dimensions are the assumed dimensions of the  original image.  Basically they define the
 * scale of the coordinate system.  If not set, the original dimensions of the target image are assumed unless a
 * box is defined.  In the latter case the box will be used to scale down the original and then use those coordinates
 * as source.
 */
@Getter
@Setter
@AllArgsConstructor(access = AccessLevel.PRIVATE)
@Builder(toBuilder = true)
public class CropDto
{
	private int x;
	private int y;
	private int width;
	private int height;

	// Source for the coordinates
	private DimensionsDto source = new DimensionsDto();

	// Box wrapping the original source
	// If box and source are specified, source is used.  If only box is specified, then the source is calculated
	// based on the box
	private DimensionsDto box = new DimensionsDto();

	public CropDto() {
	}

	public CropDto( CropDto original ) {
		x = original.x;
		y = original.y;
		width = original.width;
		height = original.height;
		source = new DimensionsDto( original.getSource() );
		box = new DimensionsDto( original.getBox() );
	}

	public CropDto( int x, int y, int width, int height ) {
		this.x = x;
		this.y = y;
		this.width = width;
		this.height = height;
	}

	public boolean hasBox() {
		return box != null && !box.equals( new DimensionsDto() );
	}

	public boolean hasSource() {
		return source != null && !source.equals( new DimensionsDto() );
	}

	/**
	 * @return dimensions of the actual crop
	 */
	public DimensionsDto getDimensions() {
		return new DimensionsDto( width, height );
	}

	@Override
	public boolean equals( Object o ) {
		if ( this == o ) {
			return true;
		}
		if ( !( o instanceof CropDto ) ) {
			return false;
		}

		CropDto cropDto = (CropDto) o;

		if ( height != cropDto.height ) {
			return false;
		}
		if ( width != cropDto.width ) {
			return false;
		}
		if ( x != cropDto.x ) {
			return false;
		}
		if ( y != cropDto.y ) {
			return false;
		}
		if ( box != null ? !box.equals( cropDto.box ) : cropDto.box != null ) {
			return false;
		}
		if ( source != null ? !source.equals( cropDto.source ) : cropDto.source != null ) {
			return false;
		}

		return true;
	}

	@Override
	public int hashCode() {
		return Objects.hash( x, y, width, height, source, box );
	}

	@Override
	public String toString() {
		return "CropDto{" +
				"x=" + x +
				", y=" + y +
				", width=" + width +
				", height=" + height +
				", source=" + source +
				", box=" + box +
				'}';
	}

	// not using @Builder.Default deliberately to stay compatible, as @Builder.Default appears
	// to only keep the default value when going through the builder
	@SuppressWarnings("unused")
	public static class CropDtoBuilder
	{
		private DimensionsDto source = new DimensionsDto();
		private DimensionsDto box = new DimensionsDto();
	}
}