import 'package:flutter/material.dart';
import 'package:flutter_lucide/flutter_lucide.dart';
import 'package:marco/helpers/widgets/my_text.dart';
import 'package:marco/images.dart';
import 'package:marco/view/auth/email_login_form.dart';
import 'package:marco/view/auth/otp_login_form.dart';
import 'package:marco/helpers/services/api_endpoints.dart';
import 'package:marco/view/auth/request_demo_bottom_sheet.dart';

enum LoginOption { email, otp }

class LoginOptionScreen extends StatelessWidget {
  const LoginOptionScreen({super.key});

  @override
  Widget build(BuildContext context) => const WelcomeScreen();
}

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

  @override
  State<WelcomeScreen> createState() => _WelcomeScreenState();
}

class _WelcomeScreenState extends State<WelcomeScreen>
    with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  late Animation<double> _logoAnimation;

  bool get _isBetaEnvironment => ApiEndpoints.baseUrl.contains("stage");

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      vsync: this,
      duration: const Duration(milliseconds: 800),
    );
    _logoAnimation = CurvedAnimation(
      parent: _controller,
      curve: Curves.easeOutBack,
    );
    _controller.forward();
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  void _showLoginDialog(BuildContext context, LoginOption option) {
  showDialog(
    context: context,
    barrierDismissible: false, // Prevent dismiss on outside tap
    builder: (_) => Dialog(
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
      insetPadding: const EdgeInsets.all(24),
      child: SingleChildScrollView(
        child: Padding(
          padding: const EdgeInsets.all(24),
          child: ConstrainedBox(
            constraints: const BoxConstraints(maxWidth: 420),
            child: Column(
              mainAxisSize: MainAxisSize.min,
              children: [
                // Row with title and close button
                Row(
                  children: [
                    Expanded(
                      child: MyText(
                        option == LoginOption.email
                            ? "Login with Email"
                            : "Login with OTP",
                        fontSize: 20,
                        fontWeight: 700,
                      ),
                    ),
                    IconButton(
                      icon: const Icon(Icons.close),
                      onPressed: () => Navigator.of(context).pop(),
                    ),
                  ],
                ),
                const SizedBox(height: 20),
                option == LoginOption.email
                    ? EmailLoginForm()
                    : const OTPLoginScreen(),
              ],
            ),
          ),
        ),
      ),
    ),
  );
}

  @override
  Widget build(BuildContext context) {
    final screenWidth = MediaQuery.of(context).size.width;

    return Scaffold(
      body: Stack(
        children: [
          const _RedWaveBackground(),
          SafeArea(
            child: Center(
              child: SingleChildScrollView(
                padding: const EdgeInsets.all(24),
                child: ConstrainedBox(
                  constraints: BoxConstraints(
                    maxWidth: screenWidth < 500 ? double.infinity : 420,
                  ),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: [
                      // Logo with circular background
                      ScaleTransition(
                        scale: _logoAnimation,
                        child: Container(
                          width: 100,
                          height: 100,
                          decoration: BoxDecoration(
                            color: Colors.white,
                            shape: BoxShape.circle,
                            boxShadow: [
                              BoxShadow(
                                color: Colors.black12,
                                blurRadius: 10,
                                offset: Offset(0, 4),
                              ),
                            ],
                          ),
                          padding: const EdgeInsets.all(20),
                          child: Image.asset(Images.logoDark),
                        ),
                      ),

                      const SizedBox(height: 24),

                      // Welcome Text
                      MyText(
                        "Welcome to Marco",
                        fontSize: 26,
                        fontWeight: 800,
                        color: Colors.black87,
                        textAlign: TextAlign.center,
                      ),
                      const SizedBox(height: 10),
                      MyText(
                        "Streamline Project Management\nBoost Productivity with Automation.",
                        fontSize: 14,
                        color: Colors.black54,
                        textAlign: TextAlign.center,
                      ),

                      if (_isBetaEnvironment) ...[
                        const SizedBox(height: 12),
                        Container(
                          padding: const EdgeInsets.symmetric(
                              horizontal: 10, vertical: 4),
                          decoration: BoxDecoration(
                            color: Colors.orangeAccent,
                            borderRadius: BorderRadius.circular(6),
                          ),
                          child: MyText(
                            'BETA',
                            color: Colors.white,
                            fontWeight: 600,
                            fontSize: 12,
                          ),
                        ),
                      ],

                      const SizedBox(height: 36),

                      _buildActionButton(
                        context,
                        label: "Login with Username",
                        icon: LucideIcons.mail,
                        option: LoginOption.email,
                      ),
                      const SizedBox(height: 16),
                      _buildActionButton(
                        context,
                        label: "Login with OTP",
                        icon: LucideIcons.message_square,
                        option: LoginOption.otp,
                      ),
                      const SizedBox(height: 16),
                      _buildActionButton(
                        context,
                        label: "Request a Demo",
                        icon: LucideIcons.phone_call,
                        option: null,
                      ),

                      const SizedBox(height: 36),
                      MyText(
                        'App version 1.0.0',
                        color: Colors.grey,
                        fontSize: 12,
                      ),
                    ],
                  ),
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildActionButton(
    BuildContext context, {
    required String label,
    required IconData icon,
    LoginOption? option,
  }) {
    return SizedBox(
      width: double.infinity,
      child: ElevatedButton.icon(
        icon: Icon(icon, size: 20, color: Colors.white),
        label: Padding(
          padding: const EdgeInsets.symmetric(vertical: 14),
          child: MyText(
            label,
            fontSize: 16,
            fontWeight: 600,
            color: Colors.white,
          ),
        ),
        style: ElevatedButton.styleFrom(
          backgroundColor: const Color(0xFFB71C1C), // Red background
          foregroundColor: Colors.white,
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(14),
          ),
          elevation: 4,
          shadowColor: Colors.black26,
        ),
        onPressed: () {
          if (option == null) {
            OrganizationFormBottomSheet.show(context);
          } else {
            _showLoginDialog(context, option);
          }
        },
      ),
    );
  }
}

/// Custom red wave background shifted lower to reduce red area at top
class _RedWaveBackground extends StatelessWidget {
  const _RedWaveBackground();

  @override
  Widget build(BuildContext context) {
    return CustomPaint(
      painter: _WavePainter(),
      size: Size.infinite,
    );
  }
}

class _WavePainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    final paint1 = Paint()
      ..shader = const LinearGradient(
        colors: [Color(0xFFB71C1C), Color(0xFFD32F2F)],
        begin: Alignment.topLeft,
        end: Alignment.bottomRight,
      ).createShader(Rect.fromLTWH(0, 0, size.width, size.height));

    final path1 = Path()
      ..moveTo(0, size.height * 0.2)
      ..quadraticBezierTo(
        size.width * 0.25,
        size.height * 0.05,
        size.width * 0.5,
        size.height * 0.15,
      )
      ..quadraticBezierTo(
        size.width * 0.75,
        size.height * 0.25,
        size.width,
        size.height * 0.1,
      )
      ..lineTo(size.width, 0)
      ..lineTo(0, 0)
      ..close();

    canvas.drawPath(path1, paint1);

    final paint2 = Paint()..color = Colors.redAccent.withOpacity(0.15);

    final path2 = Path()
      ..moveTo(0, size.height * 0.25)
      ..quadraticBezierTo(
        size.width * 0.4,
        size.height * 0.1,
        size.width,
        size.height * 0.2,
      )
      ..lineTo(size.width, 0)
      ..lineTo(0, 0)
      ..close();

    canvas.drawPath(path2, paint2);
  }

  @override
  bool shouldRepaint(CustomPainter oldDelegate) => false;
}