import 'dart:async';

import 'package:flutter/material.dart';
import 'package:mnemo_cards/features/deeplinks/deeplinks_manager_impl.dart';
import 'package:mnemo_cards/managers/repository/repository.dart';
import 'package:mnemo_cards_common/src/dtos/payment/payment_dto.dart';

import 'package:mnemo_cards_common/src/dtos/payment/product_type.dart';
import 'package:url_launcher/url_launcher_string.dart';
import 'package:webview_flutter/webview_flutter.dart';

import '../../di/locator.dart';
import '../../main.dart';
import '../analytics/analytics.dart';
import 'purchase_handler.dart';

class YookassaPurchaseHandler implements PurchaseHandler {
  final Repository _repository;

  const YookassaPurchaseHandler(this._repository);

  @override
  Future<bool> checkPurchase({
    required MnemoCardsProduct product,
    required String paymentToken,
  }) async {
    return await _repository.checkPayment(
      product: product,
      key: paymentToken,
      paymentSystem: paymentSystem,
    );
  }

  @override
  Future<void> initPurchase({
    required String id,
    required MnemoCardsProductType productType,
    required String paymentId,
    String? source,
  }) async {
    await _buyWithYooMoney(id, productType, scaffoldKey.currentContext);
  }

  Future<void> _buyWithYooMoney(
    String id,
    MnemoCardsProductType productType,
    BuildContext? context,
  ) async {
    final dto = await _repository.createPayment(
      id,
      productType,
      PaymentSystem.yookassa,
    );
    if (dto == null) {
      Analytics.buyError(
        null,
        id: id,
        PaymentSystem.yookassa,
        message: 'payment dto is null',
      );
      return;
    }
    final purchaseUrl = dto.purchaseUrl;
    final checkUrl = dto.checkUrl;
    final completer = Completer();
    bool dialogClosed = false;
    final realContext = (context ?? scaffoldKey.currentContext)!;
    completer.future.then((_) {
      if (!dialogClosed) {
        return Navigator.of(realContext).pop();
      }
    });
    final controller = WebViewController()
      ..setJavaScriptMode(JavaScriptMode.unrestricted)
      ..loadRequest(Uri.parse(purchaseUrl))
      ..setNavigationDelegate(
        NavigationDelegate(
          onNavigationRequest: (request) async {
            final url = request.url;
            if (url.startsWith('http')) {
              return NavigationDecision.navigate;
            } else if (url.startsWith('mnemocards')) {
              locator.deeplinkManager.handle(Uri.parse(url));
              if (!completer.isCompleted) {
                completer.complete();
              }
              return NavigationDecision.prevent;
            } else {
              launchUrlString(url);
              return NavigationDecision.prevent;
            }
          },
        ),
      );
    final result = showModalBottomSheet(
      context: realContext,
      enableDrag: false,
      showDragHandle: true,
      useSafeArea: true,
      isScrollControlled: true,
      backgroundColor: Colors.white,
      builder: (context) {
        return Container(
          child: WebViewWidget(controller: controller),
          padding: EdgeInsets.only(
            bottom: MediaQuery.of(context).viewInsets.bottom,
          ),
        );
      },
    ).then((_) async {
      // final success = await checkPurchase(
      //   productId: id,
      //   productType: MnemoCardsProductType.pack,
      //   paymentToken: id,
      // );
      return locator.deeplinkManager.handle(Uri.parse(checkUrl));

      // if (success) {
      //   Analytics.buyComplete(
      //     null,
      //     id: id,
      //     PaymentSystem.yookassa,
      //   );
      //   locator.packUpdater.updateAvailablePacks();
      //   return true;
      // }
      // Analytics.buyError(
      //   null,
      //   id: id,
      //   PaymentSystem.yookassa,
      //   message: 'payment not verified',
      // );
      // return false;
    });
    await result.then((_) {
      dialogClosed = true;
      if (!completer.isCompleted) {
        completer.complete();
      }
    });
  }

  @override
  PaymentSystem get paymentSystem => PaymentSystem.yookassa;
}