import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:qr_flutter/qr_flutter.dart';

import '../../../../common/extension/extension.dart';
import '../../../../common/theme/theme.dart';
import '../../../../common/ui/painter/dashed_line_painter.dart';
import '../../../../sample/reward_sample_data.dart';
import '../../../components/toast/flushbar.dart';
import '../reward_ui.dart';

class RewardDetailSheet extends StatelessWidget {
  const RewardDetailSheet({super.key, required this.reward});

  final Reward reward;

  static Future<void> show(BuildContext context, Reward reward) {
    return showModalBottomSheet<void>(
      context: context,
      isScrollControlled: true,
      backgroundColor: AppColor.white,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
      ),
      builder: (_) => RewardDetailSheet(reward: reward),
    );
  }

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

  @override
  Widget build(BuildContext context) {
    return ConstrainedBox(
      constraints: BoxConstraints(
        maxHeight: MediaQuery.sizeOf(context).height * 0.85,
      ),
      child: SafeArea(
        top: false,
        child: SingleChildScrollView(
          padding: const EdgeInsets.fromLTRB(20, 12, 20, 20),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Center(
                child: Container(
                  width: 40,
                  height: 4,
                  decoration: BoxDecoration(
                    color: AppColor.border,
                    borderRadius: BorderRadius.circular(2),
                  ),
                ),
              ),
              const SizedBox(height: 20),
              _buildHeader(),
              const SizedBox(height: 20),
              if (_isActive && reward.couponCode != null)
                _CouponBox(code: reward.couponCode!)
              else
                _buildInactiveNote(),
              const SizedBox(height: 20),
              _InfoRow(
                label: 'Ditukar pada',
                value: formatRewardDate(reward.redeemedAt),
              ),
              _InfoRow(
                label: 'Berlaku sampai',
                value: formatRewardDate(reward.validUntil),
                valueColor: isRewardExpiringSoon(reward)
                    ? AppColor.warning
                    : null,
              ),
              if (reward.usedAt != null)
                _InfoRow(
                  label: 'Dipakai pada',
                  value: formatRewardDate(reward.usedAt!),
                ),
              _InfoRow(
                label: 'Poin ditukar',
                value: '${reward.pointsUsed.thousandFormat} poin',
              ),
              if (reward.termsAndConditions != null) ...[
                const SizedBox(height: 16),
                Text(
                  'Syarat & Ketentuan',
                  style: AppStyle.md.copyWith(fontWeight: FontWeight.w700),
                ),
                const SizedBox(height: 6),
                Text(
                  reward.termsAndConditions!,
                  style: AppStyle.sm.copyWith(
                    color: AppColor.textSecondary,
                    height: 1.5,
                  ),
                ),
              ],
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildHeader() {
    return Row(
      children: [
        Container(
          width: 56,
          height: 56,
          alignment: Alignment.center,
          decoration: BoxDecoration(
            color: _isActive
                ? AppColor.primary.withOpacity(0.06)
                : AppColor.background,
            borderRadius: BorderRadius.circular(14),
          ),
          child: RewardEmoji(reward: reward, size: 28),
        ),
        const SizedBox(width: 12),
        Expanded(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text(
                reward.categoryName.toUpperCase(),
                style: AppStyle.xs.copyWith(
                  color: AppColor.textSecondary,
                  fontWeight: FontWeight.w700,
                  letterSpacing: 0.6,
                ),
              ),
              const SizedBox(height: 2),
              Text(
                reward.name,
                style: AppStyle.xl.copyWith(fontWeight: FontWeight.w700),
              ),
              Text(
                reward.description,
                style: AppStyle.sm.copyWith(color: AppColor.textSecondary),
              ),
            ],
          ),
        ),
        const SizedBox(width: 8),
        RewardStatusBadge(status: reward.status),
      ],
    );
  }

  Widget _buildInactiveNote() {
    final message = switch (reward.status) {
      RewardStatus.used =>
        reward.usedAt == null
            ? 'Reward ini sudah dipakai.'
            : 'Reward ini sudah dipakai pada '
                  '${formatRewardDate(reward.usedAt!)}.',
      _ =>
        'Masa berlaku reward ini sudah habis pada '
            '${formatRewardDate(reward.validUntil)}.',
    };

    return Container(
      padding: const EdgeInsets.all(14),
      decoration: BoxDecoration(
        color: AppColor.background,
        borderRadius: BorderRadius.circular(AppValue.borderRadius),
      ),
      child: Row(
        children: [
          Icon(Icons.info_outline, size: 20, color: reward.status.color),
          const SizedBox(width: 10),
          Expanded(
            child: Text(
              message,
              style: AppStyle.sm.copyWith(color: AppColor.textSecondary),
            ),
          ),
        ],
      ),
    );
  }
}

class _CouponBox extends StatelessWidget {
  const _CouponBox({required this.code});

  final String code;

  Future<void> _copy(BuildContext context) async {
    await Clipboard.setData(ClipboardData(text: code));
    if (!context.mounted) return;
    AppFlushbar.showSuccess(context, 'Kode reward disalin');
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        border: Border.all(color: AppColor.border),
        borderRadius: BorderRadius.circular(16),
      ),
      child: Column(
        children: [
          QrImageView(
            data: code,
            size: 168,
            padding: EdgeInsets.zero,
            backgroundColor: AppColor.white,
          ),
          const SizedBox(height: 12),
          Text(
            'Tunjukkan QR atau kode ini ke kasir',
            style: AppStyle.sm.copyWith(color: AppColor.textSecondary),
          ),
          const SizedBox(height: 14),
          CustomPaint(
            size: const Size(double.infinity, 1),
            painter: DashedLinePainter(),
          ),
          const SizedBox(height: 6),
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Flexible(
                child: Text(
                  code,
                  style: AppStyle.xl.copyWith(
                    fontWeight: FontWeight.w700,
                    letterSpacing: 2,
                  ),
                ),
              ),
              IconButton(
                onPressed: () => _copy(context),
                tooltip: 'Salin kode',
                icon: const Icon(
                  Icons.copy_rounded,
                  size: 20,
                  color: AppColor.primary,
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }
}

class _InfoRow extends StatelessWidget {
  const _InfoRow({required this.label, required this.value, this.valueColor});

  final String label;
  final String value;
  final Color? valueColor;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 6),
      child: Row(
        children: [
          Text(
            label,
            style: AppStyle.sm.copyWith(color: AppColor.textSecondary),
          ),
          const Spacer(),
          Text(
            value,
            style: AppStyle.sm.copyWith(
              color: valueColor ?? AppColor.textPrimary,
              fontWeight: FontWeight.w600,
            ),
          ),
        ],
      ),
    );
  }
}