baligh_dashboard/lib/screens/login_screen.dart

import 'package:baligh_dashboard/screens/dashboard_screen.dart';
import 'package:baligh_dashboard/widgets/app_toast.dart';
import 'package:baligh_dashboard/widgets/custom_button.dart';
import 'package:baligh_dashboard/widgets/custom_text_field.dart';
import 'package:bot_toast/bot_toast.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';

class LoginScreen extends StatefulWidget {
  const LoginScreen({super.key});

  @override
  State<LoginScreen> createState() => _LoginScreenState();
}

class _LoginScreenState extends State<LoginScreen> {
  TextEditingController usernameController = TextEditingController();
  TextEditingController passwordController = TextEditingController();

  bool isLoading = false;

  @override
  void dispose() {
    usernameController.dispose();
    passwordController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Directionality(
      textDirection: TextDirection.rtl,
      child: Scaffold(
        body: SafeArea(
          child: Center(
            child: ConstrainedBox(
              constraints: const BoxConstraints(
                maxWidth: 500,
                minWidth: 100,
              ),
              child: ListView(
                shrinkWrap: true,
                padding: const EdgeInsets.all(15),
                children: [
                  Text(
                    "تسجيل الدخول",
                    style: Theme.of(context).textTheme.headlineLarge,
                  ),
                  const SizedBox(
                    height: 50,
                  ),
                  CustomTextField(
                      controller: usernameController,
                      labelText: "اسم المشرف",
                      inputType: TextInputType.text),
                  const SizedBox(
                    height: 10,
                  ),
                  CustomTextField(
                    controller: passwordController,
                    labelText: "كلمة المرور",
                    inputType: TextInputType.text,
                    isPassword: true,
                  ),
                  const SizedBox(
                    height: 15,
                  ),
                  CustomButton(
                    label: "تسجيل الدخول",
                    isElevated: true,
                    onPressed: handleLogIn,
                    isLoading: isLoading,
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }

  Future<void> handleLogIn() async {
    if (usernameController.text.trim().isEmpty ||
        passwordController.text.trim().isEmpty) {
      BotToast.showCustomText(toastBuilder: (_) {
        return const AppToast(text: "يجب ملئ جميع الحقول");
      });

      return;
    }

    setState(() {
      isLoading = true;
    });

    try {
      final QuerySnapshot snapshot = await FirebaseFirestore.instance
          .collection('admins')
          .where('username', isEqualTo: usernameController.text.trim())
          .where('password', isEqualTo: passwordController.text.trim())
          .get();

      if (snapshot.docs.isEmpty) {
        setState(() {
          isLoading = false;
        });
        BotToast.showCustomText(toastBuilder: (_) {
          return const AppToast(text: "اسم المشرف او كلمة المرور خطأ");
        });
        return;
      }

      var admin = snapshot.docs.first.data() as Map<String, dynamic>;

      setState(() {
        isLoading = false;
      });
      if (!mounted) return;

      Navigator.push(
        context,
        MaterialPageRoute(
            builder: (context) => DashboardScreen(adminRole: admin["role"])),
      );
    } catch (e) {
      print(e);
      setState(() {
        isLoading = false;
      });
      BotToast.showCustomText(toastBuilder: (_) {
        return const AppToast(text: "حدث خطأ ما");
      });
    }
  }
}