import 'dart:async';
import 'package:flutter/material.dart';
import 'package:receive_sharing_intent/receive_sharing_intent.dart';
import 'quick_share_sheet.dart';

class ShareReceiverService {
  StreamSubscription? _intentSub;

  void init(BuildContext context) {
    // 1. Listen to shared media/text while app is in memory
    _intentSub = ReceiveSharingIntent.instance.getMediaStream().listen((List<SharedMediaFile> value) {
      if (value.isNotEmpty) {
        _handleSharedMedia(context, value);
      }
    }, onError: (err) {
      debugPrint("getMediaStream error: $err");
    });

    // 2. Get the shared media/text when the app is launched from closed state
    ReceiveSharingIntent.instance.getInitialMedia().then((List<SharedMediaFile> value) {
      if (value.isNotEmpty) {
        _handleSharedMedia(context, value);
      }
    });
  }

  void _handleSharedMedia(BuildContext context, List<SharedMediaFile> files) {
    if (files.isEmpty) return;

    for (final file in files) {
      final path = file.path;
      if (path.isEmpty) continue;

      // Check if it's an image file
      final lower = path.toLowerCase();
      if (file.type == SharedMediaType.image || lower.endsWith('.jpg') || lower.endsWith('.png') || lower.endsWith('.jpeg') || lower.endsWith('.webp')) {
        showModalBottomSheet(
          context: context,
          isScrollControlled: true,
          backgroundColor: Colors.transparent,
          builder: (ctx) => QuickShareSheet(imagePath: path),
        );
        return;
      }

      // Otherwise it's shared text or URL
      final urlRegex = RegExp(r'https?://[^\s]+');
      final match = urlRegex.firstMatch(path);
      final url = match?.group(0);
      final rawCaption = path.replaceFirst(url ?? '', '').trim();

      showModalBottomSheet(
        context: context,
        isScrollControlled: true,
        backgroundColor: Colors.transparent,
        builder: (ctx) => QuickShareSheet(
          url: url,
          rawCaption: rawCaption.isNotEmpty ? rawCaption : null,
        ),
      );
      return;
    }
  }

  void dispose() {
    _intentSub?.cancel();
  }
}