import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:queue_client/CustomWidgets.dart';
import 'package:queue_client/backend/DataManager.dart';
import 'package:queue_client/backend/Dialogs.dart';
import 'package:queue_client/home.dart';
import 'package:shared_preferences/shared_preferences.dart';

class LoginPage extends StatefulWidget {
  const LoginPage({Key? key}) : super(key: key);

  @override
  State<LoginPage> createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  TextEditingController usernameController = TextEditingController();
  TextEditingController passwordController = TextEditingController();

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    Reset();
    // AutoLogin();
  }

  void Reset() async{
      SharedPreferences prefs = await SharedPreferences.getInstance();
      prefs.clear();
      isLogging =false;
      setState(() {

      });
  }

  void AutoLogin()async{
    String results = await DataManager.instance().AutoLogin();
    isLogging = true;
    setState(() {

    });
    if(results == "0"){
      Navigator.of(context).pushReplacement(MaterialPageRoute(builder: (context)=>HomePage()));
    }else if(results == "-1"){

    }else{
      Dialogs.showAlertDialog(context, "Failed login", results);
    }

    isLogging=false;
    setState(() {

    });
  }
  bool isLogging = true;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: SafeArea(
        child: Container(
          padding: EdgeInsets.all(20),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Column(
                children: [
                  SizedBox(height: 40,),
                  // Text("Queue Helper",style:TextStyle(fontSize: 45)),
                  GradientText(text: "Digital Queue", gradient: LinearGradient(colors: [Colors.white.withOpacity(0.5), Colors.white.withOpacity(0.3)]),style: TextStyle(fontSize: 45,fontWeight: FontWeight.bold),),
                  Text("Stop waiting at queues!")
                ],
              ),
              (isLogging) ? Container() : Center(
                child: Card(
                  child: Container(
                    width: 350,
                    padding: EdgeInsets.all(20),
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        // Text("Login"),
                        ListTile(title: Text("Phone Number"),
                          subtitle: TextField(controller: usernameController,decoration: InputDecoration(hintText: "ex: 0701234567"),),),

                        ListTile(title: Text("Pay Number"),
                          subtitle: TextField(controller: passwordController,decoration: InputDecoration(hintText: "ex: 0701234567"),),),
                        SizedBox(height: 30,),

                        ElevatedButton(autofocus: true,onPressed: () async{

                          int isPhoneNumber = Helpers.isPhoneNumber(usernameController.text);
                          if(isPhoneNumber==1){
                            Dialogs.showAlertDialog(context, "Invalid Number", "Phone number must be 10 digits");
                            return;
                          }
                          if(isPhoneNumber==2 || isPhoneNumber==4){
                            Dialogs.showAlertDialog(context, "Invalid Number", "Please enter a valid phone number");
                            return;
                          }
                          if(isPhoneNumber==3){
                            Dialogs.showAlertDialog(context, "Invalid Number", "Please Enter your Personal Phone number");
                            return;
                          }

                          if(passwordController.text.length < 6){
                            Dialogs.showAlertDialog(context, "Invalid Pay Number", "Pay Number length is invalid");
                            return;
                          }

                          setState(() {
                            isLogging=true;
                          });
                          String results = await DataManager.instance().Login(usernameController.text, passwordController.text);
                          if(results == "0"){
                            Navigator.of(context).pushReplacement(MaterialPageRoute(builder: (context)=>HomePage()));
                          }else{
                            Dialogs.showAlertDialog(context, "Failed login", results);
                          }

                          setState(() {
                            isLogging=false;
                          });
                        }, child: Padding(
                          padding: const EdgeInsets.all(8.0),
                          child: Text("Login"),

                        ))
                      ],
                    ),
                  ),
                ),
              ),
              Text("Developed by Xperience Technologies",style: TextStyle(fontSize: 12,color: Colors.grey))
            ],
          ),
        ),
      ),
    );
  }
}