import 'package:flutter/material.dart';
import '../screens/main_screen.dart'; 
import 'onboarding_button.dart';

class AuthForm extends StatefulWidget {
  final VoidCallback? onSubmit;

  const AuthForm({super.key, this.onSubmit});

  @override
  State<AuthForm> createState() => _AuthFormState();
}

class _AuthFormState extends State<AuthForm> {
  bool _obscure = true;

  // Focus nodes for text fields
  late FocusNode _usernameFocusNode;
  late FocusNode _passwordFocusNode;

  void _handleLogin() {
    // Unfocus any focused text field
    _usernameFocusNode.unfocus();
    _passwordFocusNode.unfocus();

    // Call the onSubmit callback if provided (for any other logic you might have)
    if (widget.onSubmit != null) {
      widget.onSubmit!();
    }

    // Navigate to the AttendancePage
    Navigator.pushReplacement(
      context,
      MaterialPageRoute(builder: (context) => const MainPage()),
    );
  }

  @override
  void initState() {
    super.initState();
    // Initialize focus nodes
    _usernameFocusNode = FocusNode();
    _passwordFocusNode = FocusNode();
  }

  @override
  void dispose() {
    // Clean up focus nodes when widget is disposed
    _usernameFocusNode.dispose();
    _passwordFocusNode.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    // Get screen dimensions
    final screenSize = MediaQuery.of(context).size;
    final screenWidth = screenSize.width;
    final screenHeight = screenSize.height;

    // Calculate responsive dimensions
    final formWidth = screenWidth > 600 ? screenWidth * 0.5 : screenWidth * 0.9;
    final formHeight =
        screenHeight > 800 ? screenHeight * 0.6 : screenHeight * 0.8;
    final borderWidth = formWidth + 20;
    final titleFontSize = screenWidth > 600 ? 28.0 : 24.0;
    final labelFontSize = screenWidth > 600 ? 18.0 : 16.0;
    final fieldFontSize = screenWidth > 600 ? 18.0 : 16.0;
    final verticalSpacing = screenHeight > 800 ? 34.0 : 24.0;
    final fieldSpacing = screenHeight > 800 ? 30.0 : 20.0;
    final buttonSpacing = screenHeight > 800 ? 100.0 : 60.0;
    final bottomSpacing = screenHeight > 800 ? 40.0 : 20.0;
    final horizontalPadding = screenWidth > 600 ? 30.0 : 25.0;
    final verticalPadding = screenHeight > 800 ? 38.0 : 28.0;

    return Directionality(
      textDirection: TextDirection.rtl,
      child: FocusScope(
        child: Stack(
          alignment: Alignment.center,
          children: [
            // Border container - decorative element behind the form
            Container(
              width: borderWidth,
              constraints: BoxConstraints(
                minHeight: formHeight + 40,
                maxHeight:
                    formHeight + 80, // Allows shrinking when keyboard opens
              ),
              decoration: BoxDecoration(
                color: Colors.transparent,
                borderRadius: BorderRadius.circular(32),
                border: Border.all(color: const Color(0xDD00C28E), width: 1),
              ),
            ),

            // Main form container
            Container(
              width: formWidth,
              padding: EdgeInsets.symmetric(
                horizontal: horizontalPadding,
                vertical: verticalPadding,
              ),
              decoration: BoxDecoration(
                color: const Color(0xFFEEFFFA),
                borderRadius: BorderRadius.circular(28),
                boxShadow: const [
                  BoxShadow(
                    color: Colors.black26,
                    blurRadius: 10,
                    offset: Offset(0, 5),
                  ),
                ],
              ),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.stretch,
                mainAxisSize: MainAxisSize.min,
                children: [
                  /// Title
                  Center(
                    child: Text(
                      "تسجيل دخول",
                      style: TextStyle(
                        fontSize: titleFontSize,
                        fontWeight: FontWeight.bold,
                        color: Colors.black87,
                      ),
                    ),
                  ),

                  SizedBox(height: verticalSpacing),

                  /// Username Label
                  Align(
                    alignment: Alignment.centerRight,
                    child: Text(
                      "اسم المستخدم",
                      style: TextStyle(
                        fontSize: labelFontSize,
                        color: Colors.black87,
                      ),
                    ),
                  ),
                  const SizedBox(height: 8),

                  _buildField(
                    hint: "اسم المستخدم",
                    obscure: false,
                    focusNode: _usernameFocusNode,
                    textInputAction: TextInputAction.next,
                    onSubmitted: (_) {
                      // Move focus to password field when next is pressed
                      FocusScope.of(context).requestFocus(_passwordFocusNode);
                    },
                    fontSize: fieldFontSize,
                  ),

                  SizedBox(height: fieldSpacing),

                  /// Password Label
                  Align(
                    alignment: Alignment.centerRight,
                    child: Text(
                      "كلمة المرور",
                      style: TextStyle(
                        fontSize: labelFontSize,
                        color: Colors.black87,
                      ),
                    ),
                  ),
                  const SizedBox(height: 8),

                  _buildField(
                    hint: "كلمة المرور",
                    obscure: _obscure,
                    hasEye: true,
                    focusNode: _passwordFocusNode,
                    textInputAction: TextInputAction.done,
                    onSubmitted:
                        (_) =>
                            _handleLogin(), // Added parentheses to call the method
                    fontSize: fieldFontSize,
                  ),

                  SizedBox(height: buttonSpacing), // Responsive spacing

                  Center(
                    child: OnboardingButton(
                      text: "تسجيل دخول",
                      backgroundColor: const Color.fromARGB(239, 35, 87, 74),
                      onPressed: _handleLogin,
                    ),
                  ),

                  SizedBox(height: bottomSpacing),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildField({
    required String hint,
    required bool obscure,
    bool hasEye = false,
    FocusNode? focusNode,
    TextInputAction? textInputAction,
    Function(String)? onSubmitted,
    required double fontSize,
  }) {
    return Container(
      decoration: BoxDecoration(
        color: const Color(0xDEDEDEDE),
        borderRadius: BorderRadius.circular(7),
        boxShadow: const [
          BoxShadow(color: Colors.black26, blurRadius: 6, offset: Offset(0, 2)),
        ],
      ),
      child: TextField(
        focusNode: focusNode,
        obscureText: obscure,
        textAlign: TextAlign.right,
        textInputAction: textInputAction,
        onSubmitted: onSubmitted,
        style: TextStyle(fontSize: fontSize),
        decoration: InputDecoration(
          hintText: hint,
          hintStyle: const TextStyle(color: Colors.black54),
          border: InputBorder.none,
          contentPadding: const EdgeInsets.symmetric(
            vertical: 16,
            horizontal: 16,
          ),
          suffixIcon:
              hasEye
                  ? IconButton(
                    icon: Icon(
                      obscure ? Icons.visibility_off : Icons.visibility,
                      color: Colors.black54,
                    ),
                    onPressed: () {
                      setState(() => _obscure = !obscure);
                    },
                  )
                  : null,
        ),
      ),
    );
  }
}