import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../providers/agent_provider.dart';
import '../providers/call_provider.dart';
import '../widgets/agent_status_toggle.dart';
import '../widgets/dialpad.dart';
import '../widgets/queue_card.dart';
import 'active_call_screen.dart';
import 'settings_screen.dart';

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

  @override
  State<DashboardScreen> createState() => _DashboardScreenState();
}

class _DashboardScreenState extends State<DashboardScreen> {
  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addPostFrameCallback((_) {
      context.read<AgentProvider>().refresh();
    });
  }

  void _showDialer(BuildContext context) {
    final numberController = TextEditingController();
    String? selectedCallerId;

    showModalBottomSheet(
      context: context,
      isScrollControlled: true,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
      ),
      builder: (ctx) {
        final phoneNumbers = context.read<AgentProvider>().phoneNumbers;
        return StatefulBuilder(
          builder: (ctx, setSheetState) {
            return Padding(
              padding: EdgeInsets.only(
                bottom: MediaQuery.of(ctx).viewInsets.bottom,
                top: 16,
                left: 16,
                right: 16,
              ),
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: [
                  // Number display
                  TextField(
                    controller: numberController,
                    keyboardType: TextInputType.phone,
                    autofillHints: const [AutofillHints.telephoneNumber],
                    textAlign: TextAlign.center,
                    style: Theme.of(ctx).textTheme.headlineSmall,
                    decoration: InputDecoration(
                      hintText: 'Enter phone number',
                      suffixIcon: IconButton(
                        icon: const Icon(Icons.backspace_outlined),
                        onPressed: () {
                          final text = numberController.text;
                          if (text.isNotEmpty) {
                            numberController.text =
                                text.substring(0, text.length - 1);
                            numberController.selection = TextSelection.fromPosition(
                              TextPosition(offset: numberController.text.length),
                            );
                          }
                        },
                      ),
                    ),
                  ),
                  // Caller ID selector
                  if (phoneNumbers.isNotEmpty) ...[
                    const SizedBox(height: 12),
                    DropdownButtonFormField<String>(
                      initialValue: selectedCallerId,
                      decoration: const InputDecoration(
                        labelText: 'Caller ID',
                        isDense: true,
                        contentPadding: EdgeInsets.symmetric(horizontal: 12, vertical: 8),
                      ),
                      items: [
                        const DropdownMenuItem<String>(
                          value: null,
                          child: Text('Default'),
                        ),
                        ...phoneNumbers.map((p) => DropdownMenuItem<String>(
                              value: p.phoneNumber,
                              child: Text('${p.friendlyName} (${p.phoneNumber})'),
                            )),
                      ],
                      onChanged: (value) {
                        setSheetState(() {
                          selectedCallerId = value;
                        });
                      },
                    ),
                  ],
                  const SizedBox(height: 16),
                  // Dialpad
                  Dialpad(
                    onDigit: (digit) {
                      numberController.text += digit;
                      numberController.selection = TextSelection.fromPosition(
                        TextPosition(offset: numberController.text.length),
                      );
                    },
                    onClose: () => Navigator.pop(ctx),
                  ),
                  const SizedBox(height: 8),
                  // Call button
                  ElevatedButton.icon(
                    style: ElevatedButton.styleFrom(
                      backgroundColor: Colors.green,
                      foregroundColor: Colors.white,
                      minimumSize: const Size(double.infinity, 48),
                      shape: RoundedRectangleBorder(
                        borderRadius: BorderRadius.circular(24),
                      ),
                    ),
                    icon: const Icon(Icons.call),
                    label: const Text('Call'),
                    onPressed: () {
                      final number = numberController.text.trim();
                      if (number.isNotEmpty) {
                        context.read<CallProvider>().makeCall(number, callerId: selectedCallerId);
                        Navigator.pop(ctx);
                      }
                    },
                  ),
                  const SizedBox(height: 16),
                ],
              ),
            );
          },
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    final agent = context.watch<AgentProvider>();
    final call = context.watch<CallProvider>();

    // Navigate to active call screen when a call comes in
    if (call.callInfo.isActive) {
      WidgetsBinding.instance.addPostFrameCallback((_) {
        Navigator.of(context).pushAndRemoveUntil(
          MaterialPageRoute(builder: (_) => const ActiveCallScreen()),
          (route) => route.isFirst,
        );
      });
    }

    return Scaffold(
      appBar: AppBar(
        title: const Text('TWP Softphone'),
        actions: [
          // SSE connection indicator
          Padding(
            padding: const EdgeInsets.only(right: 8),
            child: Icon(
              Icons.circle,
              size: 12,
              color: agent.sseConnected ? Colors.green : Colors.red,
            ),
          ),
          IconButton(
            icon: const Icon(Icons.settings),
            onPressed: () => Navigator.push(context,
                MaterialPageRoute(builder: (_) => const SettingsScreen())),
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () => _showDialer(context),
        child: const Icon(Icons.phone),
      ),
      body: RefreshIndicator(
        onRefresh: () => agent.refresh(),
        child: ListView(
          padding: const EdgeInsets.all(16),
          children: [
            const AgentStatusToggle(),
            const SizedBox(height: 24),
            Text('Queues',
                style: Theme.of(context).textTheme.titleMedium),
            const SizedBox(height: 8),
            if (agent.queues.isEmpty)
              const Card(
                child: Padding(
                  padding: EdgeInsets.all(24),
                  child: Center(child: Text('No queues assigned')),
                ),
              )
            else
              ...agent.queues.map((q) => Padding(
                    padding: const EdgeInsets.only(bottom: 8),
                    child: QueueCard(queue: q),
                  )),
          ],
        ),
      ),
    );
  }
}