import 'dart:async';

import 'package:flutter/material.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:shadcn_ui/shadcn_ui.dart';

import '../../../common/theme/spacing.dart';
import '../application/update_progress.dart';
import '../application/update_service.dart';
import '../data/update_api_client.dart';

class UpdateDialog extends ConsumerStatefulWidget {
  const UpdateDialog({super.key, required this.upgrade, required this.source});

  final UpgradeInfo upgrade;
  final UpgradeCheckSource source;

  @override
  ConsumerState<UpdateDialog> createState() => _UpdateDialogState();
}

class _UpdateDialogState extends ConsumerState<UpdateDialog> {
  bool _clickReported = false;

  @override
  Widget build(BuildContext context) {
    ensureUpdateProgressListener(context);
    final colorScheme = ShadTheme.of(context).colorScheme;
    final progress = ref.watch(updateProgressProvider);
    final forced = widget.upgrade.force == 1;
    final canStart = progress == null || progress <= 0 || progress == 1;
    final version = widget.upgrade.latestVersion.trim().isEmpty
        ? widget.upgrade.versionCode
        : widget.upgrade.latestVersion;

    return PopScope(
      canPop: !forced,
      child: SafeArea(
        top: false,
        child: Padding(
          padding: const EdgeInsets.fromLTRB(22, 28, 22, 20),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Text(
                '发现新版本 V$version',
                textAlign: TextAlign.center,
                style: TextStyle(
                  color: colorScheme.foreground,
                  fontSize: 18,
                  fontWeight: FontWeight.w600,
                ),
              ),
              if (widget.upgrade.message.trim().isNotEmpty) ...[
                const SizedBox(height: 12),
                Text(
                  widget.upgrade.message,
                  style: TextStyle(
                    color: colorScheme.mutedForeground,
                    fontSize: 14,
                    height: 1.6,
                  ),
                ),
              ],
              const SizedBox(height: Spacing.sectionGap),
              if (canStart)
                FilledButton(
                  onPressed: () => _startUpdate(progress),
                  child: Text(progress == 1 ? '安装此版本' : '升级此版本'),
                )
              else
                LinearProgressIndicator(
                  value: progress.clamp(0, 1),
                  color: colorScheme.primary,
                  backgroundColor: colorScheme.muted,
                ),
              if (!forced && !canStart) ...[
                const SizedBox(height: 10),
                TextButton(
                  onPressed: () => Navigator.of(context).pop(),
                  child: const Text('转后台下载'),
                ),
              ],
              if (!forced) ...[
                const SizedBox(height: 6),
                TextButton(
                  onPressed: () => Navigator.of(context).pop(),
                  child: const Text('稍后再说'),
                ),
              ],
            ],
          ),
        ),
      ),
    );
  }

  Future<void> _startUpdate(double? progress) async {
    if (!_clickReported) {
      _clickReported = true;
      unawaited(_reportClick());
    }
    final localPackage = ref.read(updateUrlProvider);
    if (progress == 1 && localPackage != null && localPackage.isNotEmpty) {
      await UpdateService.install(localPackage);
      return;
    }
    await UpdateService.startUpdate(widget.upgrade.url);
  }

  Future<void> _reportClick() async {
    if (widget.upgrade.versionCode.isEmpty) return;
    try {
      await ref
          .read(updateApiClientProvider)
          .reportClick(
            buildId: widget.upgrade.versionCode,
            source: widget.source == UpgradeCheckSource.manual
                ? 'manual'
                : 'auto',
          );
    } catch (_) {}
  }
}