import 'package:flutter/material.dart';
import 'package:flutter_lucide/flutter_lucide.dart';
import 'package:on_field_work/helpers/widgets/my_text.dart';
import 'package:on_field_work/images.dart';
import 'package:on_field_work/view/auth/email_login_form.dart';
import 'package:on_field_work/view/auth/otp_login_form.dart';
import 'package:on_field_work/helpers/services/api_endpoints.dart';
import 'package:on_field_work/view/auth/request_demo_bottom_sheet.dart';
import 'package:on_field_work/helpers/utils/mixins/ui_mixin.dart';
import 'package:on_field_work/helpers/widgets/wave_background.dart';
import 'package:package_info_plus/package_info_plus.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, UIMixin {
  late final AnimationController _controller;
  late final Animation<double> _logoAnimation;
  bool get _isBetaEnvironment => ApiEndpoints.baseUrl.contains("stage");

  String _appVersion = '';

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

    _fetchAppVersion();
  }

  Future<void> _fetchAppVersion() async {
    PackageInfo packageInfo = await PackageInfo.fromPlatform();
    setState(() {
      _appVersion = '${packageInfo.version}+${packageInfo.buildNumber}';
    });
  }

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

  void _showLoginDialog(BuildContext context, LoginOption option) {
    showDialog(
      context: context,
      barrierDismissible: false,
      builder: (_) => Dialog(
        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
        insetPadding: const EdgeInsets.all(24),
        child: SingleChildScrollView(
          padding: const EdgeInsets.all(24),
          child: ConstrainedBox(
            constraints: const BoxConstraints(maxWidth: 420),
            child: Column(
              mainAxisSize: MainAxisSize.min,
              children: [
                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;
    final isNarrow = screenWidth < 500;

    return Scaffold(
      body: Stack(
        children: [
          RedWaveBackground(brandRed: contentTheme.primary),
          SafeArea(
            child: Center(
              child: SingleChildScrollView(
                padding: const EdgeInsets.all(24),
                child: ConstrainedBox(
                  constraints: BoxConstraints(
                      maxWidth: isNarrow ? double.infinity : 420),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: [
                      _buildLogo(),
                      const SizedBox(height: 24),
                      _buildWelcomeText(),
                      if (_isBetaEnvironment) ...[
                        const SizedBox(height: 12),
                        _buildBetaBadge(),
                      ],
                      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),

                      // Dynamic App Version
                      if (_appVersion.isNotEmpty)
                        MyText(
                          'App version $_appVersion',
                          color: Colors.grey,
                          fontSize: 12,
                        ),
                    ],
                  ),
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildLogo() {
    return ScaleTransition(
      scale: _logoAnimation,
      child: Container(
        width: 100,
        height: 100,
        padding: const EdgeInsets.all(20),
        decoration: const BoxDecoration(
          color: Colors.white,
          shape: BoxShape.circle,
          boxShadow: [
            BoxShadow(
                color: Colors.black12, blurRadius: 10, offset: Offset(0, 4))
          ],
        ),
        child: Image.asset(Images.logoDark),
      ),
    );
  }

  Widget _buildWelcomeText() {
    return Column(
      children: [
        MyText(
          "Welcome to On Field Work",
          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,
        ),
      ],
    );
  }

  Widget _buildBetaBadge() {
    return 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,
      ),
    );
  }

  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: contentTheme.primary,
          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);
          }
        },
      ),
    );
  }
}
