import 'dart:convert';
import 'dart:math';

import 'package:gymlink_module_web/interfaces/items.dart';
import 'package:shared_preferences/shared_preferences.dart';

Future<List<GymHistoryItem>> getHistory() async {
  final prefs = await SharedPreferences.getInstance();
  String historyString = prefs.getString('history') ?? "[]";
  List<GymHistoryItem> history = [];
  for (var historyItem in jsonDecode(historyString) as List<dynamic>) {
    history.add(GymHistoryItem.fromJson(historyItem));
  }
  history.sort((a, b) => b.id.compareTo(a.id));
  history = history.reversed.toList();
  return history;
}

Future<void> addToHistory(GymHistoryItem item) async {
  final prefs = await SharedPreferences.getInstance();
  String historyString = prefs.getString('history') ?? "[]";
  List<GymHistoryItem> history = [];
  for (var historyItem in jsonDecode(historyString) as List<dynamic>) {
    history.add(GymHistoryItem.fromJson(historyItem));
  }
  item.id = Random().nextInt(100000).toString();
  String detailHistoryString = prefs.getString('detail_history') ?? "[]";
  List<GymHistoryItemDetail> detailHistory = [];
  for (var historyItem in jsonDecode(detailHistoryString) as List<dynamic>) {
    detailHistory.add(GymHistoryItemDetail.fromJson(historyItem));
  }
  var json = {
    "id": item.id,
    "date": DateTime.now()
        .toLocal()
        .toLocal()
        .toString()
        .split(' ')[0]
        .replaceAll('-', '.')
        .split('.')
        .reversed
        .join('.'),
    "sum": Random().nextInt(100000).toString(),
    "pay_url": [null, "https://example.org"][Random().nextInt(2)],
    "receiver": "Иванов Иван Иванович ${Random().nextInt(100000).toString()}",
    "email": "a${Random().nextInt(100000).toString()}@a.ru",
    "address":
        "г. ${['Москва', 'Петербург', 'Новгород'][Random().nextInt(3)]}, ул. ${[
      'Пушкина',
      'Ленина',
      'Лермонтова'
    ][Random().nextInt(3)]}, д. ${Random().nextInt(100).toString()}",
    "providers": [
      {
        "id": Random().nextInt(100000).toString(),
        "name": "Поставщик ${Random().nextInt(100000).toString()}",
        "status": ["Доставлен", "Доставляется", "Ожидает"][Random().nextInt(3)],
        "items": [
          {
            "photo": "url${Random().nextInt(100000).toString()}",
            "id": Random().nextInt(100000).toString(),
            "count": Random().nextInt(100),
            "price": Random().nextInt(100000).toString()
          },
          {
            "photo": "url${Random().nextInt(100000).toString()}",
            "id": Random().nextInt(100000).toString(),
            "count": Random().nextInt(100),
            "price": Random().nextInt(100000).toString()
          }
        ]
      },
      {
        "id": Random().nextInt(100000).toString(),
        "name": "Поставщик ${Random().nextInt(100000).toString()}",
        "status": ["Доставлен", "Доставляется", "Ожидает"][Random().nextInt(3)],
        "items": [
          {
            "photo": "url${Random().nextInt(100000).toString()}",
            "id": Random().nextInt(100000).toString(),
            "count": Random().nextInt(100),
            "price": Random().nextInt(100000).toString()
          }
        ]
      }
    ]
  };
  final detailHistoryItem = GymHistoryItemDetail.fromJson(json);
  detailHistory.add(detailHistoryItem);
  history.add(GymHistoryItem(
      date: detailHistoryItem.date,
      id: detailHistoryItem.id,
      photo: 'product.png',
      sum: detailHistoryItem.sum));
  prefs.setString('history', jsonEncode(history));
  prefs.setString('detail_history', jsonEncode(detailHistory));
}

Future<GymHistoryItemDetail?> getHistoryDetail(String id) async {
  final prefs = await SharedPreferences.getInstance();
  String historyString = prefs.getString('detail_history') ?? "[]";
  for (var historyItem in jsonDecode(historyString) as List<dynamic>) {
    if (GymHistoryItemDetail.fromJson(historyItem).id == id) {
      return GymHistoryItemDetail.fromJson(historyItem);
    }
  }
  return null;
}