import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:groceries_manager/pages/main/home_controller.dart';
import 'package:groceries_manager/services/db_service.dart';
import 'package:groceries_manager/services/toaster_service.dart';
import 'package:groceries_manager/utils/get_interface_extension.dart';

import '../../../db/database.dart';

class UserManagerController extends GetxController {
  final users = <UserData>[].obs;

  @override
  void onInit() {
    super.onInit();

    refreshData();
  }

  Future<void> refreshData() async {
    final users = await DBService.to.db.getUsers();

    this.users.clear();
    this.users.addAll(users);
  }

  void cancel() {
    Get.backLegacy();
  }

  Future<void> changeUserPassword(UserData item) async {
    final newPassword = await Get.prompt(
      title: "Изменение пароля для '${item.login}'",
      label: "Новый пароль",
      stringValidator: (value) {
        if (RegExp(r'[^а-яА-Яa-zA-Z0-9]').hasMatch(value ?? "")) {
          return "Пароль не соответствует требованиям: а-яА-Яa-zA-Z0-9";
        }
        return null;
      },
    );

    if (newPassword == null) {
      return;
    }

    await DBService.to.db.updateUserPassword(
      item,
      password: newPassword,
    );

    refreshData();
  }

  Future<void> deleteUser(UserData item) async {
    final currentUser = Get<HomeController>().user.value;

    if (currentUser.id == item.id) {
      ToasterService.to.error(
        title: "Ошибка",
        message: "Нельзя удалить самого себя!",
      );
      return;
    }

    final confirmed = await Get.confirm(
      title: "Внимание!",
      content: "Удаление пользователя необратимо!\n"
          "Точно хотите удалить '${item.login}'?",
    );

    if (!confirmed) return;

    final deleted = await DBService.to.db.deleteUser(item);
    if (!deleted) {
      ToasterService.to.error(
        title: "Ошибка",
        message: "Нельзя единственного пользователя!",
      );
    }

    refreshData();
  }
}

class UserManagerDialog extends GetView<UserManagerController> {
  const UserManagerDialog({super.key});

  @override
  Widget build(BuildContext context) {
    final size = Get.size;
    return AlertDialog(
      title: const Text("Управление категориями"),
      content: SizedBox(
        width: size.width * 0.9,
        height: size.height * 0.9,
        child: SingleChildScrollView(
          child: Obx(
            () => Table(
              border: TableBorder.all(color: Colors.blueGrey.withAlpha(50)),
              children: [
                const TableRow(
                  children: [
                    TableCell(
                      child: Padding(
                        padding: EdgeInsets.all(8.0),
                        child: Text("Логин"),
                      ),
                    ),
                    TableCell(
                      child: Padding(
                        padding: EdgeInsets.all(8.0),
                        child: Text("Частичный хэш пароля"),
                      ),
                    ),
                    TableCell(
                      child: SizedBox(),
                    ),
                  ],
                ),
                for (final item in controller.users)
                  TableRow(
                    key: ValueKey(item),
                    children: [
                      TableCell(
                        child: Padding(
                          padding: const EdgeInsets.all(8.0),
                          child: Text(item.login),
                        ),
                      ),
                      TableCell(
                        child: Padding(
                          padding: const EdgeInsets.all(8.0),
                          child: Text("${item.password.substring(0, 20)}..."),
                        ),
                      ),
                      TableCell(
                        child: Padding(
                          padding: const EdgeInsets.all(8.0),
                          child: Column(
                            children: [
                              ElevatedButton.icon(
                                onPressed: () =>
                                    controller.changeUserPassword(item),
                                icon: const Icon(Icons.edit_rounded),
                                label: const Text("Изменить пароль"),
                              ),
                              const SizedBox(height: 4),
                              ElevatedButton.icon(
                                onPressed: () => controller.deleteUser(item),
                                icon: const Icon(Icons.delete_forever),
                                label: const Text("Удалить"),
                              ),
                            ],
                          ),
                        ),
                      ),
                    ],
                  ),
              ],
            ),
          ),
        ),
      ),
      actions: [
        TextButton(
          onPressed: () => controller.cancel(),
          child: const Text("Закрыть"),
        ),
      ],
    );
  }

  static Future<void> show({
    UserData? ecd,
  }) async {
    Get.put(UserManagerController());

    await Get.dialog(
      const UserManagerDialog(),
      id: "UserManagerDialog",
      name: "UserManagerDialog",
    );

    Get.delete<UserManagerController>();
  }
}