import 'package:flutter/material.dart';

import 'package:notas/models/note.dart';

// Small presentational widget for a note inside the grid.
// Keep this widget lightweight and layout-agnostic: it should not force
// width/height constraints (so it works inside different parent layouts
// like MasonryGridView or Draggable feedback). Visual styling only.

class NoteCard extends StatefulWidget {
  const NoteCard({
    super.key,
    required this.note,
    this.onTap,
    this.isDragging = false,
    this.borderColor,
  });

  final Note note;
  final VoidCallback? onTap;
  final bool isDragging;
  final Color? borderColor;

  @override
  State<NoteCard> createState() => _NoteCardState();
}

class _NoteCardState extends State<NoteCard> {
  bool _isPressed = false;

  @override
  Widget build(BuildContext context) {
    final bool showGrabbing = widget.isDragging || _isPressed;

    return MouseRegion(
      cursor: showGrabbing ? SystemMouseCursors.grabbing : SystemMouseCursors.grab,
      child: GestureDetector(
        onTapDown: widget.onTap == null
            ? null
            : (_) {
                setState(() {
                  _isPressed = true;
                });
              },
        onTapUp: widget.onTap == null
            ? null
            : (_) {
                setState(() {
                  _isPressed = false;
                });
              },
        onTapCancel: widget.onTap == null
            ? null
            : () {
                setState(() {
                  _isPressed = false;
                });
              },
        onTap: widget.onTap,
        child: Container(
          padding: const EdgeInsets.all(16),
          decoration: BoxDecoration(
            color: const Color.fromRGBO(24, 25, 26, 1),
            borderRadius: BorderRadius.circular(12),
            border: Border.all(
              color: widget.borderColor ?? Colors.white24,
              width: 1,
            ),
          ),
          child: LayoutBuilder(
            builder: (BuildContext context, BoxConstraints constraints) {
              // Estimate whether the body will exceed 20 lines without always
              // running the expensive TextPainter layout. This heuristic counts
              // newline characters and estimates wrapped lines based on an
              // average characters-per-line to handle many short lines well.
              final List<String> rawLines = widget.note.body.split('\n');
              const int avgCharsPerLine = 40;
              int estimatedLines = 0;
              for (final String line in rawLines) {
                estimatedLines += (line.trim().length ~/ avgCharsPerLine) + 1;
              }

              final bool needsPreciseMeasurement = estimatedLines > 20;
              final bool isBodyTruncated;

              if (needsPreciseMeasurement) {
                final TextPainter textPainter = TextPainter(
                  text: TextSpan(
                    text: widget.note.body,
                    style: const TextStyle(color: Colors.white70, fontSize: 14),
                  ),
                  maxLines: 20,
                  textDirection: TextDirection.ltr,
                )..layout(maxWidth: constraints.maxWidth);

                isBodyTruncated = textPainter.didExceedMaxLines;
              } else {
                isBodyTruncated = false;
              }

              return Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                mainAxisSize: MainAxisSize.min,
                children: [
                  Text(
                    widget.note.title,
                    style: const TextStyle(
                      color: Colors.white,
                      fontSize: 16,
                      fontWeight: FontWeight.bold,
                    ),
                    maxLines: 2,
                    overflow: TextOverflow.ellipsis,
                  ),
                  const SizedBox(height: 8),
                  Text(
                    widget.note.body,
                    style: const TextStyle(color: Colors.white70, fontSize: 14),
                    maxLines: 20,
                    overflow: TextOverflow.clip,
                  ),
                  if (isBodyTruncated) ...[
                    const SizedBox(height: 4),
                    const Text(
                      '...',
                      style: TextStyle(
                        color: Colors.white54,
                        fontSize: 18,
                        height: 1,
                      ),
                    ),
                  ],
                ],
              );
            },
          ),
        ),
      ),
    );
  }
}