import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../providers/settings_provider.dart';
import '../services/api_service.dart';

class RegisterPage extends StatefulWidget {
  @override
  _RegisterPageState createState() => _RegisterPageState();
}

class _RegisterPageState extends State<RegisterPage> {
  final _usernameController = TextEditingController();
  final _passwordController = TextEditingController();
  bool _isLoading = false;

  void _handleRegister() async {
    setState(() => _isLoading = true);
    final settings = context.read<SettingsProvider>();
    final api = ApiService(settings, null);

    try {
      final response = await api.register(
        _usernameController.text,
        _passwordController.text,
      );

      if (response.statusCode == 201) {
        ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text("Registered! Please login.")));
        Navigator.pop(context);
      } else {
        final error = jsonDecode(response.body)['error'] ?? "Registration Failed";
        ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(error)));
      }
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text("Network Error")));
    } finally {
      setState(() => _isLoading = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Register")),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          children: [
            TextField(controller: _usernameController, decoration: InputDecoration(labelText: "Username")),
            TextField(controller: _passwordController, decoration: InputDecoration(labelText: "Password"), obscureText: true),
            SizedBox(height: 20),
            _isLoading ? CircularProgressIndicator() : ElevatedButton(onPressed: _handleRegister, child: Text("Register")),
          ],
        ),
      ),
    );
  }
}