import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:marco/helpers/services/api_service.dart';
import 'package:marco/helpers/services/app_logger.dart';

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

  @override
  State<CurrentPlanScreen> createState() => _CurrentPlanScreenState();
}

class _CurrentPlanScreenState extends State<CurrentPlanScreen> {
  bool _loading = true;
  Map<String, dynamic>? _plan;

  @override
  void initState() {
    super.initState();
    _fetchCurrentPlan();
  }

  Future<void> _fetchCurrentPlan() async {
    try {
      setState(() => _loading = true);
      final resp = await ApiService.getCurrentSubscription();
      logSafe("💡 Get Current Subscription Response: $resp");
      if (resp == null || resp['success'] != true) {
        setState(() {
          _plan = null;
          _loading = false;
        });
        return;
      }
      final data = resp['data'] ?? resp;
      setState(() {
        _plan = data is Map ? Map<String, dynamic>.from(data) : null;
        _loading = false;
      });
    } catch (e, s) {
      logSafe("❌ Exception while fetching current plan: $e\n$s", level: LogLevel.error);
      if (mounted) setState(() => _loading = false);
    }
  }

  Widget _buildPlaceholder() {
    return Center(
      child: Column(mainAxisSize: MainAxisSize.min, children: [
        const Icon(Icons.info_outline, size: 48, color: Colors.grey),
        const SizedBox(height: 12),
        const Text("No active subscription", style: TextStyle(fontSize: 16, color: Colors.grey)),
        const SizedBox(height: 8),
        ElevatedButton(
          onPressed: () => Get.toNamed('/subscription'),
          child: const Text("View Plans"),
        ),
      ]),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Current Plan", style: TextStyle(fontWeight: FontWeight.w600, color: Colors.black)),
        leading: IconButton(
          icon: const Icon(Icons.arrow_back_ios_new),
          onPressed: () => Get.back(),
        ),
      ),
      body: _loading
          ? const Center(child: CircularProgressIndicator())
          : Padding(
              padding: const EdgeInsets.all(16),
              child: _plan == null
                  ? _buildPlaceholder()
                  : Column(
                      crossAxisAlignment: CrossAxisAlignment.stretch,
                      children: [
                        Card(
                          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
                          elevation: 3,
                          child: Padding(
                            padding: const EdgeInsets.all(16),
                            child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
                              Text(
                                _planDisplayName(_plan!),
                                style: const TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
                              ),
                              const SizedBox(height: 8),
                              Text(_plan!['description'] ?? '', style: const TextStyle(color: Colors.grey)),
                              const SizedBox(height: 12),
                              Row(
                                children: [
                                  Text("Price: ", style: TextStyle(color: Colors.grey[700])),
                                  Text("${_currencySymbol(_plan!)}${_plan!['price'] ?? 0}", style: const TextStyle(fontWeight: FontWeight.bold)),
                                  const Spacer(),
                                  Text("Trial: ${_plan!['trialDays'] ?? 0} days", style: const TextStyle(color: Colors.grey)),
                                ],
                              ),
                              const SizedBox(height: 12),
                              if (_plan!['startedAt'] != null)
                                Text("Started: ${_plan!['startedAt']}", style: const TextStyle(color: Colors.grey)),
                              if (_plan!['expiresAt'] != null)
                                Text("Expires: ${_plan!['expiresAt']}", style: const TextStyle(color: Colors.grey)),
                            ]),
                          ),
                        ),

                        const SizedBox(height: 16),

                        // Features / modules (if present)
                        if (_plan!['features'] != null)
                          Expanded(
                            child: SingleChildScrollView(
                              child: Column(
                                crossAxisAlignment: CrossAxisAlignment.start,
                                children: _buildFeaturesList(_plan!),
                              ),
                            ),
                          )
                        else
                          const SizedBox.shrink(),

                        const SizedBox(height: 16),

                        ElevatedButton(
                          onPressed: () {
                            // navigate to subscription page (renew flow)
                            // pass current plan id so subscription screen can preselect if needed
                            Get.toNamed('/subscription', arguments: {'currentPlanId': _plan!['id']});
                          },
                          style: ElevatedButton.styleFrom(padding: const EdgeInsets.symmetric(vertical: 14)),
                          child: const Text("Renew Plan"),
                        ),
                      ],
                    ),
            ),
    );
  }

  String _planDisplayName(Map<String, dynamic> plan) {
    return plan['planName'] ?? plan['name'] ?? 'Plan';
  }

  String _currencySymbol(Map<String, dynamic> plan) {
    try {
      return plan['currency']?['symbol'] ?? '₹';
    } catch (_) {
      return '₹';
    }
  }

  List<Widget> _buildFeaturesList(Map<String, dynamic> plan) {
    final features = <String>[];
    try {
      final modules = plan['features']?['modules'] ?? {};
      if (modules is Map) {
        modules.forEach((k, v) {
          if (v is Map && v['enabled'] == true) features.add(v['name'] ?? k);
        });
      }
      final supports = plan['features']?['supports'] ?? {};
      if (supports is Map) {
        supports.forEach((k, v) {
          if (v == true) features.add(k.toString().replaceAll(RegExp(r'([a-z])([A-Z])'), r'\1 \2'));
        });
      }
    } catch (_) {}
    if (features.isEmpty) return [const SizedBox.shrink()];
    return [
      const SizedBox(height: 12),
      const Text("Included features", style: TextStyle(fontWeight: FontWeight.w600)),
      const SizedBox(height: 8),
      ...features.map((f) => Padding(
            padding: const EdgeInsets.symmetric(vertical: 4),
            child: Row(children: [const Icon(Icons.check, size: 16, color: Colors.green), const SizedBox(width: 8), Expanded(child: Text(f))]),
          )),
    ];
  }
}