import 'dart:convert';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:socialbuddy_mobile/core/constants/colors.dart';
import 'package:socialbuddy_mobile/features/posts/screens/posts_screen.dart';
import 'package:socialbuddy_mobile/features/home/widgets/feature_card.dart';
import 'package:socialbuddy_mobile/features/connect/screens/social_connect_details_screen.dart';
import 'package:socialbuddy_mobile/features/automation/screens/automation_screen.dart';
import 'package:socialbuddy_mobile/features/connect/screens/channels_screen.dart';

import 'package:socialbuddy_mobile/features/profile/screens/profile_screen.dart';
import 'package:socialbuddy_mobile/features/profile/screens/pricing_screen.dart';

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

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  int _selectedIndex = 0;

  static final List<Widget> _widgetOptions = <Widget>[
    const DashboardTab(),
    const SocialMediaConnectScreen(),
    const ChannelsScreen(),
    const PostsScreen(),
    const AutomationScreen(),
    const ProfileScreen(),
  ];

  void _onItemTapped(int index) {
    setState(() {
      _selectedIndex = index;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: AppColors.darkBg,
      appBar: AppBar(
        backgroundColor: AppColors.darkBg,
        elevation: 0,
        leading: Padding(
          padding: const EdgeInsets.all(12.0),
          child: Image.asset('assets/images/logo_sb.png', errorBuilder: (c, e, s) => const Icon(Icons.hub, color: Colors.blue)),
        ),
        actions: [
          IconButton(
            icon: Container(
              padding: const EdgeInsets.all(6),
              decoration: BoxDecoration(
                color: Colors.white.withOpacity(0.05),
                shape: BoxShape.circle,
              ),
              child: const Icon(Icons.person_outline, color: Colors.white70, size: 20),
            ),
            onPressed: () => _onItemTapped(5), // Navigate to Profile (index 5)
          ),
          const SizedBox(width: 8),
        ],
      ),
      body: _widgetOptions.elementAt(_selectedIndex),
      bottomNavigationBar: Container(
        decoration: BoxDecoration(
          border: Border(top: BorderSide(color: Colors.white.withOpacity(0.05))),
        ),
        child: BottomNavigationBar(
          items: const <BottomNavigationBarItem>[
            BottomNavigationBarItem(
              icon: Icon(Icons.grid_view_outlined),
              activeIcon: Icon(Icons.grid_view),
              label: 'Home',
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.link),
              activeIcon: Icon(Icons.link),
              label: 'Connect',
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.account_circle_outlined),
              activeIcon: Icon(Icons.account_circle),
              label: 'Channels',
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.post_add_outlined),
              activeIcon: Icon(Icons.post_add),
              label: 'Posts',
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.comment_outlined),
              activeIcon: Icon(Icons.comment),
              label: 'Automation',
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.person_outline),
              activeIcon: Icon(Icons.person),
              label: 'Profile',
            ),
          ],
          currentIndex: _selectedIndex,
          selectedItemColor: Colors.blueAccent,
          unselectedItemColor: Colors.white38,
          showUnselectedLabels: true,
          type: BottomNavigationBarType.fixed,
          backgroundColor: AppColors.darkBg,
          selectedLabelStyle: GoogleFonts.nunito(fontWeight: FontWeight.bold, fontSize: 10),
          unselectedLabelStyle: GoogleFonts.nunito(fontSize: 10),
          onTap: _onItemTapped,
        ),
      ),
    );
  }
}

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

  Future<void> _checkAndNavigate(BuildContext context, Widget screen) async {
    final prefs = await SharedPreferences.getInstance();
    final userJson = prefs.getString('user_details');
    
    if (userJson != null) {
      final user = jsonDecode(userJson);
      final role = user['role'];
      
      if (role == 'customer') {
        final session = prefs.getString('payment_session');
        if (session == null) {
          Navigator.push(
            context,
            MaterialPageRoute(builder: (context) => const PricingScreen()),
          );
          return;
        }
      }
    }
    
    if (context.mounted) {
      Navigator.push(
        context,
        MaterialPageRoute(builder: (context) => screen),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    // Get the parent state to change tabs
    final homeState = context.findAncestorStateOfType<_HomeScreenState>();

    return SingleChildScrollView(
      padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 20),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Container(
                padding: const EdgeInsets.all(8),
                decoration: BoxDecoration(
                  border: Border.all(color: Colors.cyanAccent.withOpacity(0.5)),
                  borderRadius: BorderRadius.circular(8),
                ),
                child: const Icon(Icons.add, color: Colors.cyanAccent, size: 24),
              ),
              const SizedBox(width: 16),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      "Social Buddy",
                      style: GoogleFonts.nunito(
                        color: Colors.white,
                        fontSize: 28,
                        fontWeight: FontWeight.w800,
                      ),
                    ),
                    Text(
                      "Dashboard",
                      style: GoogleFonts.nunito(
                        color: Colors.white,
                        fontSize: 28,
                        fontWeight: FontWeight.w800,
                        height: 1,
                      ),
                    ),
                  ],
                ),
              ),
            ],
          ),
          const SizedBox(height: 24),
          Text(
            "Explore all tools and features below.",
            style: GoogleFonts.nunito(
              color: Colors.white.withOpacity(0.5),
              fontSize: 16,
            ),
          ),
          const SizedBox(height: 32),
          FeatureCard(
            title: "Auto Reply",
            description: "Automatically reply to comments/messages using smart automation.",
            icon: Icons.chat_bubble_outline_rounded,
            iconColor: Colors.blueAccent,
            onTap: () => _checkAndNavigate(context, const AutomationScreen()),
          ),
          FeatureCard(
            title: "Instagram Channels",
            description: "Select and connect specific Instagram business accounts to manage.",
            icon: Icons.account_tree_outlined,
            iconColor: Colors.pinkAccent,
            onTap: () => _checkAndNavigate(context, const ChannelsScreen()),
          ),
          FeatureCard(
            title: "Instagram Media",
            description: "View all Instagram media from your connected accounts with insights.",
            icon: Icons.camera_alt_outlined,
            iconColor: Colors.cyanAccent,
            onTap: () => homeState?._onItemTapped(1), 
          ),
          FeatureCard(
            title: "Social Media Posts",
            description: "Create, schedule, and publish posts for multiple platforms.",
            icon: Icons.send_rounded,
            iconColor: Colors.greenAccent,
            onTap: () => homeState?._onItemTapped(1),
          ),
          FeatureCard(
            title: "Automation Logs",
            description: "Track auto reply logs and automation actions with timestamps.",
            icon: Icons.history_rounded,
            iconColor: Colors.orangeAccent,
            onTap: () {
               ScaffoldMessenger.of(context).showSnackBar(
                const SnackBar(content: Text("Automation Logs coming soon!")),
              );
            },
          ),
          FeatureCard(
            title: "Users",
            description: "Manage users, roles, and access permissions.",
            icon: Icons.person_search_outlined,
            iconColor: Colors.purpleAccent,
            onTap: () {
               ScaffoldMessenger.of(context).showSnackBar(
                const SnackBar(content: Text("User Management coming soon!")),
              );
            },
          ),
          FeatureCard(
            title: "Reports",
            description: "Analyze insights, performance charts, and engagement metrics.",
            icon: Icons.auto_graph_rounded,
            iconColor: Colors.cyanAccent,
            onTap: () {
               ScaffoldMessenger.of(context).showSnackBar(
                const SnackBar(content: Text("Reports and Analytics coming soon!")),
              );
            },
          ),
          const SizedBox(height: 40),
          Center(
            child: Column(
              children: [
                Text(
                  "© 2025. SocialBuddy All rights reserved.",
                  style: GoogleFonts.nunito(color: Colors.white38, fontSize: 12),
                ),
                const SizedBox(height: 4),
                Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Text(
                      "Powered By ",
                      style: GoogleFonts.nunito(color: Colors.white38, fontSize: 12),
                    ),
                    Text(
                      "MetatronCube",
                      style: GoogleFonts.nunito(
                        color: Colors.blueAccent.withOpacity(0.7),
                        fontSize: 12,
                        decoration: TextDecoration.underline,
                      ),
                    ),
                  ],
                ),
              ],
            ),
          ),
          const SizedBox(height: 20),
        ],
      ),
    );
  }
}