import 'package:flutter/material.dart';

import '../../../../common/extension/extension.dart';
import '../../../../common/theme/theme.dart';
import '../../../../sample/reward_sample_data.dart';
import '../reward_ui.dart';

/// Kartu reward berbentuk tiket: sobekan kiri (emoji + poin) dan isi kanan.
class RewardCard extends StatelessWidget {
  const RewardCard({super.key, required this.reward, required this.onTap});

  final Reward reward;
  final VoidCallback onTap;

  static const double _stubWidth = 84;

  bool get _isActive => reward.status == RewardStatus.active;

  @override
  Widget build(BuildContext context) {
    return PhysicalShape(
      clipper: const _TicketClipper(notchX: _stubWidth + 0.5),
      color: AppColor.white,
      elevation: 2,
      shadowColor: Colors.black.withOpacity(0.25),
      child: Material(
        type: MaterialType.transparency,
        child: InkWell(
          onTap: onTap,
          child: IntrinsicHeight(
            child: Row(
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: [
                _buildStub(),
                const Padding(
                  padding: EdgeInsets.symmetric(vertical: 14),
                  child: CustomPaint(
                    size: Size(1, double.infinity),
                    painter: _VerticalDashPainter(),
                  ),
                ),
                Expanded(child: _buildBody()),
              ],
            ),
          ),
        ),
      ),
    );
  }

  Widget _buildStub() {
    return Container(
      width: _stubWidth,
      color: _isActive
          ? AppColor.primary.withOpacity(0.06)
          : AppColor.background,
      padding: const EdgeInsets.symmetric(vertical: 16),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          RewardEmoji(reward: reward, size: 34),
          const SizedBox(height: 8),
          Text(
            reward.pointsUsed.thousandFormat,
            style: AppStyle.md.copyWith(
              color: _isActive ? AppColor.primary : AppColor.textSecondary,
              fontWeight: FontWeight.w700,
            ),
          ),
          Text(
            'poin',
            style: AppStyle.xs.copyWith(color: AppColor.textSecondary),
          ),
        ],
      ),
    );
  }

  Widget _buildBody() {
    return Padding(
      padding: const EdgeInsets.fromLTRB(14, 12, 14, 12),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Expanded(
                child: Text(
                  reward.categoryName.toUpperCase(),
                  style: AppStyle.xs.copyWith(
                    color: AppColor.textSecondary,
                    fontWeight: FontWeight.w700,
                    letterSpacing: 0.6,
                  ),
                ),
              ),
              RewardStatusBadge(status: reward.status),
            ],
          ),
          const SizedBox(height: 4),
          Text(
            reward.name,
            maxLines: 1,
            overflow: TextOverflow.ellipsis,
            style: AppStyle.lg.copyWith(
              color: _isActive ? AppColor.textPrimary : AppColor.textSecondary,
              fontWeight: FontWeight.w700,
            ),
          ),
          const SizedBox(height: 2),
          Text(
            reward.description,
            maxLines: 1,
            overflow: TextOverflow.ellipsis,
            style: AppStyle.sm.copyWith(color: AppColor.textSecondary),
          ),
          const SizedBox(height: 10),
          Row(
            children: [
              Expanded(child: _buildFootnote()),
              if (_isActive) ...[
                const SizedBox(width: 8),
                Container(
                  padding: const EdgeInsets.symmetric(
                    horizontal: 14,
                    vertical: 6,
                  ),
                  decoration: BoxDecoration(
                    color: AppColor.primary,
                    borderRadius: BorderRadius.circular(20),
                  ),
                  child: Text(
                    'Pakai',
                    style: AppStyle.sm.copyWith(
                      color: AppColor.white,
                      fontWeight: FontWeight.w700,
                    ),
                  ),
                ),
              ],
            ],
          ),
        ],
      ),
    );
  }

  Widget _buildFootnote() {
    final (IconData icon, String text, Color color) = switch (reward.status) {
      RewardStatus.active => (
        Icons.schedule,
        rewardValidityLabel(reward),
        isRewardExpiringSoon(reward)
            ? AppColor.warning
            : AppColor.textSecondary,
      ),
      RewardStatus.used => (
        Icons.check_circle_outline,
        reward.usedAt == null
            ? 'Sudah dipakai'
            : 'Dipakai ${formatRewardDate(reward.usedAt!)}',
        AppColor.textSecondary,
      ),
      RewardStatus.expired => (
        Icons.event_busy_outlined,
        'Berakhir ${formatRewardDate(reward.validUntil)}',
        AppColor.textSecondary,
      ),
    };

    return Row(
      children: [
        Icon(icon, size: 14, color: color),
        const SizedBox(width: 4),
        Expanded(
          child: Text(
            text,
            maxLines: 2,
            overflow: TextOverflow.ellipsis,
            style: AppStyle.xs.copyWith(
              color: color,
              fontWeight: FontWeight.w600,
            ),
          ),
        ),
      ],
    );
  }
}

/// Persegi panjang membulat dengan lekuk setengah lingkaran di atas dan
/// bawah pada posisi [notchX], tempat garis sobekan tiket.
class _TicketClipper extends CustomClipper<Path> {
  const _TicketClipper({required this.notchX});

  final double notchX;

  static const double _radius = 16;
  static const double _notchRadius = 8;

  @override
  Path getClip(Size size) {
    final card = Path()
      ..addRRect(
        RRect.fromRectAndRadius(
          Offset.zero & size,
          const Radius.circular(_radius),
        ),
      );
    final notches = Path()
      ..addOval(
        Rect.fromCircle(center: Offset(notchX, 0), radius: _notchRadius),
      )
      ..addOval(
        Rect.fromCircle(
          center: Offset(notchX, size.height),
          radius: _notchRadius,
        ),
      );
    return Path.combine(PathOperation.difference, card, notches);
  }

  @override
  bool shouldReclip(covariant _TicketClipper oldClipper) =>
      oldClipper.notchX != notchX;
}

class _VerticalDashPainter extends CustomPainter {
  const _VerticalDashPainter();

  static const double _dash = 5;
  static const double _gap = 4;

  @override
  void paint(Canvas canvas, Size size) {
    final paint = Paint()
      ..color = AppColor.border
      ..strokeWidth = size.width;
    final x = size.width / 2;

    for (double y = 0; y < size.height; y += _dash + _gap) {
      final end = (y + _dash).clamp(0, size.height).toDouble();
      canvas.drawLine(Offset(x, y), Offset(x, end), paint);
    }
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
}