/// One OCR text fragment with pixel bounding box on the receipt image.
library;

class OcrElement {
  const OcrElement({
    required this.text,
    required this.left,
    required this.top,
    required this.right,
    required this.bottom,
  });

  final String text;
  final double left;
  final double top;
  final double right;
  final double bottom;

  double get centerX => (left + right) / 2;
  double get centerY => (top + bottom) / 2;
  double get height => (bottom - top).abs();
  double get width => (right - left).abs();
}

/// One ML Kit text line with its word-level elements.
class OcrLine {
  const OcrLine({
    required this.text,
    required this.elements,
    required this.left,
    required this.top,
    required this.right,
    required this.bottom,
  });

  final String text;
  final List<OcrElement> elements;
  final double left;
  final double top;
  final double right;
  final double bottom;

  double get centerY => (top + bottom) / 2;
}

/// All positioned elements from one ML Kit recognition pass.
class OcrDocument {
  const OcrDocument({
    required this.elements,
    required this.lines,
    required this.imageWidth,
    required this.imageHeight,
    required this.flattenedText,
  });

  final List<OcrElement> elements;
  final List<OcrLine> lines;
  final double imageWidth;
  final double imageHeight;
  final String flattenedText;
}