import 'package:auto_route/auto_route.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'dart:math' as math;

import '../../../../application/auth/auth_bloc.dart';
import '../../../../application/auth/login_form/login_form_bloc.dart';
import '../../../../common/extension/extension.dart';
import '../../../../common/theme/theme.dart';
import '../../../../injection.dart';
import '../../../components/button/button.dart';
import '../../../components/spacer/spacer.dart';
import '../../../components/toast/flushbar.dart';
import '../../../router/app_router.gr.dart';
import 'widgets/email_field.dart';
import 'widgets/password_field.dart';

@RoutePage()
class LoginPage extends StatelessWidget implements AutoRouteWrapper {
  const LoginPage({super.key});

  @override
  Widget wrappedRoute(BuildContext context) =>
      BlocProvider(create: (_) => getIt<LoginFormBloc>(), child: this);

  @override
  Widget build(BuildContext context) {
    return BlocListener<LoginFormBloc, LoginFormState>(
      listenWhen: (previous, current) =>
          previous.failureOrAuthOption != current.failureOrAuthOption,
      listener: (context, state) {
        state.failureOrAuthOption.fold(
          () => null,
          (either) => either.fold(
            (f) => AppFlushbar.showAuthFailureToast(context, f),
            (user) {
              if (context.mounted) {
                context.read<AuthBloc>().add(AuthEvent.fetchCurrentUser());
                context.router.replace(const MainRoute());
              }
            },
          ),
        );
      },
      child: Scaffold(
        body: Container(
          decoration: const BoxDecoration(
            gradient: LinearGradient(
              begin: Alignment.topLeft,
              end: Alignment.bottomRight,
              colors: AppColor.primaryGradient,
            ),
          ),
          child: Stack(
            children: [
              _buildStaticBackground(context),
              SafeArea(
                child: Center(
                  child: SingleChildScrollView(
                    padding: EdgeInsets.symmetric(horizontal: AppValue.padding),
                    child: BlocBuilder<LoginFormBloc, LoginFormState>(
                      builder: (context, state) {
                        return Column(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: [
                            _buildLogo(context),
                            const SpaceHeight(48),
                            _buildLoginCard(
                              context,
                              state.isSubmitting,
                              state.showErrorMessages,
                            ),
                          ],
                        );
                      },
                    ),
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildStaticBackground(BuildContext context) {
    final size = MediaQuery.of(context).size;
    return Stack(
      children: [
        // Static circles
        ...List.generate(6, (index) {
          final double circleSize = 80 + (index * 40);
          final double left = (index * 60.0) % size.width;
          final double top = (index * 120.0) % size.height;

          return Positioned(
            left: left,
            top: top,
            child: Container(
              width: circleSize,
              height: circleSize,
              decoration: BoxDecoration(
                shape: BoxShape.circle,
                color: Colors.white.withOpacity(0.1),
                border: Border.all(
                  color: Colors.white.withOpacity(0.2),
                  width: 2,
                ),
              ),
            ),
          );
        }),

        // Geometric shapes
        Positioned(
          top: 100,
          right: 50,
          child: Transform.rotate(
            angle: math.pi / 4,
            child: Container(
              width: 60,
              height: 60,
              decoration: BoxDecoration(
                color: Colors.white.withOpacity(0.08),
                borderRadius: BorderRadius.circular(12),
                border: Border.all(
                  color: Colors.white.withOpacity(0.15),
                  width: 1,
                ),
              ),
            ),
          ),
        ),

        Positioned(
          bottom: 150,
          left: 30,
          child: Container(
            width: 80,
            height: 80,
            decoration: BoxDecoration(
              color: Colors.white.withOpacity(0.06),
              shape: BoxShape.circle,
              border: Border.all(
                color: Colors.white.withOpacity(0.12),
                width: 1,
              ),
            ),
          ),
        ),

        // Static particles
        ...List.generate(8, (index) {
          return Positioned(
            left: (index * 45.0) % size.width,
            top: (index * 80.0) % size.height,
            child: Container(
              width: 4.0 + (index % 3) * 2,
              height: 4.0 + (index % 3) * 2,
              decoration: BoxDecoration(
                shape: BoxShape.circle,
                color: Colors.white.withOpacity(0.3),
              ),
            ),
          );
        }),

        // Gradient overlay
        Container(
          decoration: BoxDecoration(
            gradient: LinearGradient(
              begin: Alignment.topCenter,
              end: Alignment.bottomCenter,
              colors: [
                Colors.transparent,
                Colors.black.withOpacity(0.1),
                Colors.transparent,
              ],
            ),
          ),
        ),
      ],
    );
  }

  Widget _buildLogo(BuildContext context) {
    return Column(
      children: [
        Text(
          context.lang.login_header,
          style: AppStyle.h1.copyWith(
            fontWeight: FontWeight.bold,
            color: AppColor.white,
          ),
          textAlign: TextAlign.center,
        ),
        const SpaceHeight(8),
        Text(
          context.lang.login_desc,
          style: AppStyle.lg.copyWith(color: AppColor.textLight),
        ),
      ],
    );
  }

  Widget _buildLoginCard(
    BuildContext context,
    bool isLoading,
    bool showErrorMessages,
  ) {
    return Container(
      width: double.infinity,
      padding: const EdgeInsets.symmetric(vertical: 32, horizontal: 24),
      decoration: BoxDecoration(
        color: AppColor.white,
        borderRadius: BorderRadius.circular(24),
        boxShadow: [
          BoxShadow(
            color: AppColor.black.withOpacity(0.15),
            blurRadius: 40,
            offset: const Offset(0, 20),
            spreadRadius: 0,
          ),
          BoxShadow(
            color: AppColor.black.withOpacity(0.1),
            blurRadius: 10,
            offset: const Offset(0, 5),
            spreadRadius: 0,
          ),
        ],
      ),
      child: Form(
        autovalidateMode: showErrorMessages
            ? AutovalidateMode.always
            : AutovalidateMode.disabled,
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            LoginEmailField(),
            const SpaceHeight(24),
            LoginPasswordField(),
            const SpaceHeight(16),
            _buildForgetPassword(context),
            const SpaceHeight(32),
            _buildLoginButton(context, isLoading),
          ],
        ),
      ),
    );
  }

  Widget _buildForgetPassword(BuildContext context) {
    return Align(
      alignment: Alignment.centerRight,
      child: GestureDetector(
        onTap: () {},
        child: Text(
          '${context.lang.forgot_password}?',
          style: AppStyle.md.copyWith(
            color: AppColor.primary,
            fontWeight: FontWeight.w600,
          ),
        ),
      ),
    );
  }

  Widget _buildLoginButton(BuildContext context, bool isLoading) {
    return AppElevatedButton(
      text: context.lang.sign_in,
      isLoading: isLoading,
      onPressed: () {
        context.read<LoginFormBloc>().add(LoginFormEvent.submitted());
      },
    );
  }
}