import 'package:flutter/material.dart';
import 'package:cached_network_image/cached_network_image.dart';
import 'package:provider/provider.dart';
import 'package:test_sa/extensions/int_extensions.dart';
import 'package:test_sa/extensions/text_extensions.dart';
import 'package:test_sa/extensions/widget_extensions.dart';
import 'package:test_sa/modules/cx_module/chat/services/call_manager.dart';
import 'package:test_sa/modules/cx_module/chat/model/call_session.dart';
import 'package:test_sa/modules/cx_module/chat/call/utils/permission_helper.dart';
import 'package:test_sa/new_views/app_style/app_color.dart';
import 'package:test_sa/new_views/common_widgets/default_app_bar.dart';

class AudioCallPage extends StatefulWidget {
  const AudioCallPage({Key? key}) : super(key: key);

  @override
  State<AudioCallPage> createState() => _AudioCallPageState();
}

class _AudioCallPageState extends State<AudioCallPage> {
  late CallManager _callManager;

  @override
  void initState() {
    super.initState();
     // HYBRID: Get CallManager from Provider (UI layer)
    _callManager = Provider.of<CallManager>(context, listen: false);
    // Listen for call end and navigate back
    _callManager.addListener(_checkCallStatus);
    
    // CRITICAL: Check permissions after first frame
    // Permissions must be requested in UI layer, not service layer
    WidgetsBinding.instance.addPostFrameCallback((_) {
      _checkPermissions();
    });
  }

  /// Request audio call permissions using production-ready helper
  Future<void> _checkPermissions() async {
    if (!mounted) return;
    
    // Request all audio call permissions (microphone)
    final granted = await CallPermissionHelper.requestAudioCallPermissions(context);
    
    if (!granted && mounted) {
      // Permission denied - end the call gracefully
      await CallPermissionHelper.handlePermissionDeniedDuringCall(
        context,
        'Microphone',
        onEndCall: () => _callManager.declineCall('permission_denied'),
        delaySeconds: 2,
      );
    }
  }

  void _checkCallStatus() {
    // If call status is idle (call ended), navigate back
    if (_callManager.callStatus == CallStatus.idle && mounted) {
      Navigator.of(context).pop();
    }
  }

  @override
  void dispose() {
    _callManager.removeListener(_checkCallStatus);
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: AppColor.backgroundTabBarDark,
      appBar: const DefaultAppBar(
        backgroundColor: Colors.transparent,
        arrowBackColor: AppColor.white10,
      ),
      body: SafeArea(
        child: ListenableBuilder(
          listenable: _callManager,
          builder: (context, _) {
            final session = _callManager.currentCall;
            if (session == null) {
              return const Center(child: Text('No active call'));
            }
            return Column(
              children: [
                const Spacer(flex: 2),
                _buildContactInfo(context, session),
                8.height,
                _buildCallStatusOrDuration(context),
                const Spacer(flex: 4),
                _buildControls(context, session),
                32.height,
              ],
            );
          },
        ),
      ),
    );
  }

  Widget _buildTopBar(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(16.0),
      child: Row(
        children: [
          IconButton(
            icon: const Icon(Icons.arrow_back, color: Colors.white),
            onPressed: () => Navigator.pop(context),
          ),
          const Spacer(),
          Text(
            'Audio Call',
            style: AppTextStyles.heading6.copyWith(
              color: Colors.white,
              fontWeight: FontWeight.w600,
            ),
          ),
          const Spacer(),
          const SizedBox(width: 48), // Balance the back button
        ],
      ),
    );
  }

  Widget _buildContactInfo(BuildContext context, CallSession session) {
    final isPeerMuted = _callManager.isPeerMuted;

    return Column(
      children: [
        Stack(
          alignment: Alignment.center,
          children: [
            Container(
              padding: const EdgeInsets.all(14),
              decoration: BoxDecoration(
                shape: BoxShape.circle,
                color: AppColor.whiteF8d,
                border: Border.all(color: AppColor.white10.withOpacity(0.2), width: 1),
              ),
              child: ClipOval(
                child: session.peerAvatar != null
                    ? CachedNetworkImage(
                        imageUrl: session.peerAvatar!,
                        fit: BoxFit.cover,
                        placeholder: (context, url) => Center(
                          child: CircularProgressIndicator(
                            color: Colors.white.withOpacity(0.5),
                          ),
                        ),
                        errorWidget: (context, url, error) => 'call_user_avatar'.toSvgAsset(height: 48, width: 48),
                      )
                    : 'call_user_avatar'.toSvgAsset(height: 48, width: 48),
              ),
            ),
            // Show mute indicator when peer is muted
            if (isPeerMuted)
              Positioned(
                bottom: 0,
                right: 0,
                child: Container(
                  padding: const EdgeInsets.all(8),
                  decoration: BoxDecoration(
                    color: AppColor.red30,
                    shape: BoxShape.circle,
                    border: Border.all(color: AppColor.white10, width: 2),
                  ),
                  child: 'mic_disable'.toSvgAsset(
                    width: 16,
                    height: 16,
                    color: AppColor.white10,
                  ),
                ),
              ),
          ],
        ),
        24.height,
        Text(
          session.peerName,
          style: AppTextStyles.heading2.copyWith(
            color: Colors.white,
            fontWeight: FontWeight.w600,
          ),
          textAlign: TextAlign.center,
        ),
        // Show "Microphone is off" text when peer is muted
        if (isPeerMuted)
          Column(
            children: [
              8.height,
              Container(
                padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
                decoration: BoxDecoration(
                  color: AppColor.red30.withOpacity(0.3),
                  borderRadius: BorderRadius.circular(12),
                ),
                child: Row(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    'mic_disable'.toSvgAsset(
                      width: 14,
                      height: 14,
                      color: AppColor.white10,
                    ),
                    6.width,
                    Text(
                      'Microphone is off',
                      style: AppTextStyles.bodyText2.copyWith(
                        color: AppColor.white10,
                        fontSize: 12,
                      ),
                    ),
                  ],
                ),
              ),
            ],
          ),
      ],
    );
  }

  Widget _buildCallStatusOrDuration(BuildContext context) {
    final status = _callManager.callStatus;
    final duration = _callManager.callDuration;

    String statusText;
    if (status == CallStatus.connected) {
      // Show call duration
      final minutes = duration.inMinutes;
      final seconds = duration.inSeconds % 60;
      statusText = '${minutes.toString().padLeft(2, '0')}:${seconds.toString().padLeft(2, '0')}';
    } else {
      // Show call status
      statusText = _getStatusText(status);
    }

    return Text(
      statusText,
      style: AppTextStyles.bodyText.copyWith(color: Colors.white70),
    );
  }

  String _getStatusText(CallStatus status) {
    switch (status) {
      case CallStatus.connecting:
        return 'Connecting...';
      case CallStatus.incomingRinging:
        return 'Incoming call...';
      case CallStatus.outgoingRinging:
        return 'Ringing...';
      case CallStatus.connected:
        return 'Connected';
      default:
        return '';
    }
  }

  Widget _buildControls(BuildContext context, CallSession session) {
    final isMuted = _callManager.isMuted;
    final isSpeakerOn = _callManager.isSpeakerOn;

    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 32.0),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: [
          _buildControlButton(
            icon: isMuted ? Icons.mic_off : Icons.mic,
            label: isMuted ? 'Unmute' : 'Mute',
            onPressed: () => _callManager.toggleMute(),
            backgroundColor: isMuted ? Colors.red : Colors.white24,
          ),
          _buildControlButton(
            icon: isSpeakerOn ? Icons.volume_up : Icons.volume_down,
            label: isSpeakerOn ? 'Speaker' : 'Earpiece',
            onPressed: () => _callManager.toggleSpeaker(),
            backgroundColor: isSpeakerOn ? Colors.blue : Colors.white24,
          ),
          _buildControlButton(
            icon: Icons.call_end,
            label: 'End',
            onPressed: () => _callManager.hangUp(),
            backgroundColor: Colors.red,
            iconColor: Colors.white,
          ),
        ],
      ),
    );
  }

  Widget _buildControlButton({
    required IconData icon,
    required String label,
    required VoidCallback onPressed,
    Color? backgroundColor,
    Color? iconColor,
  }) {
    return Column(
      children: [
        Container(
          padding: const EdgeInsets.all(18),
          decoration: BoxDecoration(
            color: backgroundColor ?? AppColor.black2E,
            shape: BoxShape.circle,
            border: Border.all(color: AppColor.white10.withOpacity(0.2)),
          ),
          child: Icon(
            icon,
            size: 24,
            color: iconColor ?? AppColor.white10,
          ),
        ).onPress(() {
          onPressed();
        }),
        8.height,
        Text(
          label,
          style: AppTextStyles.heading5.copyWith(color: AppColor.neutral100, fontWeight: FontWeight.w400),
        ),
      ],
    );
  }
}