import 'package:flutter/material.dart';

import '../../../../common/extension/extension.dart';
import '../../../../common/theme/theme.dart';
import '../../../../domain/wallet/wallet.dart';
import '../../wallet/wallet_ui.dart';
import '../reward_ui.dart';

/// Detail voucher milik customer. Untuk memakai voucher, customer
/// menunjukkan layar ini ke kasir; POS belum bisa menandai voucher terpakai.
class RedemptionDetailSheet extends StatelessWidget {
  const RedemptionDetailSheet({super.key, required this.redemption});

  final VoucherRedemption redemption;

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

  @override
  Widget build(BuildContext context) {
    final faceValue = voucherFaceValueLabel(
      redemption.voucherType,
      redemption.faceValue,
    );

    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),
              _buildStatusContent(),
              const SizedBox(height: 20),
              if (redemption.createdAt != null)
                _InfoRow(
                  label: 'Ditukar pada',
                  value: formatWibDateTime(redemption.createdAt!),
                ),
              if (redemption.status == VoucherRedemptionStatus.completed &&
                  redemption.codeExpiresAt != null)
                _InfoRow(
                  label: 'Berlaku sampai',
                  value: formatWibDateTime(redemption.codeExpiresAt!),
                ),
              _InfoRow(
                label: 'EnakPoint ditukar',
                value: redemption.pointCost.thousandFormat,
              ),
              if (faceValue != null)
                _InfoRow(label: 'Nilai voucher', value: faceValue),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildHeader() {
    final status = redemption.status;
    return Row(
      children: [
        Container(
          width: 56,
          height: 56,
          alignment: Alignment.center,
          decoration: BoxDecoration(
            color: AppColor.primary.withOpacity(0.06),
            borderRadius: BorderRadius.circular(14),
          ),
          child: VoucherImage(url: redemption.voucherImageUrl, size: 40),
        ),
        const SizedBox(width: 12),
        Expanded(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Text(
                voucherTypeLabel(
                  redemption.voucherType,
                  redemption.faceValue,
                ).toUpperCase(),
                style: AppStyle.xs.copyWith(
                  color: AppColor.textSecondary,
                  fontWeight: FontWeight.w700,
                  letterSpacing: 0.6,
                ),
              ),
              const SizedBox(height: 2),
              Text(
                redemption.voucherName,
                style: AppStyle.xl.copyWith(fontWeight: FontWeight.w700),
              ),
            ],
          ),
        ),
        if (status != VoucherRedemptionStatus.unknown) ...[
          const SizedBox(width: 8),
          VoucherRedemptionStatusBadge(status: status),
        ],
      ],
    );
  }

  Widget _buildStatusContent() {
    switch (redemption.status) {
      case VoucherRedemptionStatus.completed:
        return redemption.code == null
            ? const VoucherNoCodeNote()
            : VoucherCodeBox(code: redemption.code!);
      case VoucherRedemptionStatus.pending:
        return const _Note(
          icon: Icons.hourglass_top_rounded,
          color: AppColor.warning,
          message:
              'Voucher sedang diproses. EnakPoint sudah terpotong; cek lagi '
              'nanti.',
        );
      case VoucherRedemptionStatus.failed:
        return const _Note(
          icon: Icons.undo_rounded,
          color: AppColor.error,
          message: 'Gagal, EnakPoint sudah dikembalikan.',
        );
      case VoucherRedemptionStatus.unknown:
        return const SizedBox.shrink();
    }
  }
}

class _Note extends StatelessWidget {
  const _Note({required this.icon, required this.color, required this.message});

  final IconData icon;
  final Color color;
  final String message;

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.all(14),
      decoration: BoxDecoration(
        color: AppColor.background,
        borderRadius: BorderRadius.circular(AppValue.borderRadius),
      ),
      child: Row(
        children: [
          Icon(icon, size: 20, color: color),
          const SizedBox(width: 10),
          Expanded(
            child: Text(
              message,
              style: AppStyle.sm.copyWith(color: AppColor.textSecondary),
            ),
          ),
        ],
      ),
    );
  }
}

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

  final String label;
  final String value;

  @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(fontWeight: FontWeight.w600)),
        ],
      ),
    );
  }
}