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

import '../application/splash_ad_controller.dart';
import 'ad_media.dart';

enum SplashAdResult { clicked, skipped, completed }

class SplashAdDialog extends StatefulWidget {
  const SplashAdDialog({
    super.key,
    required this.entry,
    required this.onClick,
    required this.onShown,
  });
  final SplashAdEntry entry;
  final Future<void> Function() onClick;
  final VoidCallback onShown;
  @override
  State<SplashAdDialog> createState() => _SplashAdDialogState();
}

class _SplashAdDialogState extends State<SplashAdDialog> {
  Timer? timer;
  late int remain;
  bool opening = false;
  @override
  void initState() {
    super.initState();
    remain = widget.entry.ad.countdownSeconds.clamp(1, 5);
    WidgetsBinding.instance.addPostFrameCallback((_) {
      widget.onShown();
    });
    timer = Timer.periodic(const Duration(seconds: 1), (_) {
      if (remain <= 1) {
        Navigator.of(context).pop(SplashAdResult.completed);
      } else if (mounted) {
        setState(() => remain--);
      }
    });
  }

  @override
  void dispose() {
    timer?.cancel();
    super.dispose();
  }

  Future<void> open() async {
    if (opening) return;
    opening = true;
    timer?.cancel();
    await widget.onClick();
    if (mounted) Navigator.of(context).pop(SplashAdResult.clicked);
  }

  @override
  Widget build(BuildContext context) => Material(
    color: Colors.black,
    child: Stack(
      children: [
        Positioned.fill(
          child: GestureDetector(
            onTap: open,
            child: AdMedia(
              ad: widget.entry.ad,
              assetPath: widget.entry.assetPath,
            ),
          ),
        ),
        Positioned(
          top: MediaQuery.paddingOf(context).top + 16,
          right: 18,
          child: FilledButton(
            onPressed: () => Navigator.of(context).pop(SplashAdResult.skipped),
            child: Text('跳过 ${remain}s'),
          ),
        ),
      ],
    ),
  );
}