import 'package:eatvio_app/features/insights/presentation/widgets/insights_colors.dart';
import 'package:flutter/material.dart';

/// Крупное число + единица + строка с дельтой.
class InsightsHead extends StatelessWidget {
  const InsightsHead({
    super.key,
    required this.headline,
    required this.unit,
    required this.deltaText,
    this.isDeltaHighlighted = true,
  });

  final String headline;
  final String unit;
  final String deltaText;

  /// Зелёная дельта при наличии изменения, иначе нейтральный серый.
  final bool isDeltaHighlighted;

  @override
  Widget build(BuildContext context) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Row(
          crossAxisAlignment: CrossAxisAlignment.baseline,
          textBaseline: TextBaseline.alphabetic,
          children: [
            Text(
              headline,
              key: const Key('insights_headline'),
              style: const TextStyle(
                fontSize: 34,
                fontWeight: FontWeight.w800,
                color: InsightsColors.title,
                height: 1.1,
              ),
            ),
            if (unit.isNotEmpty) ...[
              const SizedBox(width: 6),
              Text(
                unit,
                style: const TextStyle(
                  fontSize: 16,
                  fontWeight: FontWeight.w600,
                  color: InsightsColors.subtitle,
                ),
              ),
            ],
          ],
        ),
        if (deltaText.isNotEmpty) ...[
          const SizedBox(height: 4),
          Text(
            deltaText,
            key: const Key('insights_delta'),
            style: TextStyle(
              fontSize: 13.5,
              fontWeight: FontWeight.w700,
              color: isDeltaHighlighted
                  ? InsightsColors.positive
                  : InsightsColors.subtitle,
            ),
          ),
        ],
      ],
    );
  }
}