import 'package:flutter/material.dart';

import 'package:pshared/models/payment/payment.dart';
import 'package:pshared/models/payment/fx/quote.dart';
import 'package:pshared/utils/currency.dart';
import 'package:pshared/utils/money.dart';

import 'package:pweb/pages/report/details/section.dart';
import 'package:pweb/pages/report/details/sections/rows.dart';

import 'package:pweb/generated/i18n/app_localizations.dart';


class PaymentFxSection extends StatelessWidget {
  final Payment payment;

  const PaymentFxSection({super.key, required this.payment});

  @override
  Widget build(BuildContext context) {
    final loc = AppLocalizations.of(context)!;
    final fx = payment.lastQuote?.fxQuote;
    final rows = buildDetailRows([
      DetailValue(label: loc.fxRateLabel, value: _formatRate(fx)),
    ]);

    return DetailsSection(title: loc.paymentDetailsFx, children: rows);
  }

  String? _formatRate(FxQuote? fx) {
    if (fx == null) return null;
    final price = fx.price?.trim();
    if (price == null || price.isEmpty) return null;

    final baseCurrency = _resolveCurrencyCode([
      fx.baseCurrency,
      fx.baseAmount?.currency.isoCode,
    ]);
    final quoteCurrency = _resolveCurrencyCode([
      fx.quoteCurrency,
      fx.quoteAmount?.currency.isoCode,
    ]);

    if (baseCurrency == null || quoteCurrency == null) return price;

    final baseDisplay =
        parseMoneyWithCurrencyCode('1', baseCurrency)?.toString() ??
        '1 $baseCurrency';
    final quoteDisplay =
        parseMoneyWithCurrencyCode(
          _normalizeAmount(price),
          quoteCurrency,
        )?.toString() ??
        '$price $quoteCurrency';

    return '$baseDisplay = $quoteDisplay';
  }

  String? _resolveCurrencyCode(List<String?> values) {
    for (final value in values) {
      if (value == null || value.isEmpty) continue;
      final resolved = money2CurrencyFromCode(value);
      if (resolved != null) return resolved.isoCode;
      return value;
    }
    return null;
  }

  String _normalizeAmount(String raw) {
    return raw.replaceAll(RegExp(r'\s+'), '').replaceAll(',', '.');
  }
}