import 'package:flutter/material.dart';
import 'package:obtainium/services/apps_provider.dart';
import 'package:obtainium/services/source_service.dart';
import 'package:webview_flutter/webview_flutter.dart';
import 'package:provider/provider.dart';

class AppPage extends StatefulWidget {
  const AppPage({super.key, required this.appId});

  final String appId;

  @override
  State<AppPage> createState() => _AppPageState();
}

class _AppPageState extends State<AppPage> {
  @override
  Widget build(BuildContext context) {
    var appsProvider = context.watch<AppsProvider>();
    App? app = appsProvider.apps[widget.appId];
    if (app?.installedVersion != null) {
      appsProvider.getUpdate(app!.id);
    }
    return Scaffold(
      appBar: AppBar(
        title: Text('${app?.author}/${app?.name}'),
      ),
      body: WebView(
        initialUrl: app?.url,
      ),
      bottomSheet: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          Padding(
              padding:
                  const EdgeInsets.symmetric(vertical: 8.0, horizontal: 16.0),
              child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  children: [
                    Expanded(
                        child: ElevatedButton(
                            onPressed: (app?.installedVersion == null ||
                                        appsProvider
                                            .checkAppObjectForUpdate(app!)) &&
                                    app?.currentDownloadId == null
                                ? () {
                                    appsProvider
                                        .backgroundDownloadAndInstallApp(app!);
                                  }
                                : null,
                            child: Text(app?.installedVersion == null
                                ? 'Install'
                                : 'Update'))),
                    const SizedBox(width: 16.0),
                    ElevatedButton(
                      onPressed: app?.currentDownloadId != null
                          ? null
                          : () {
                              showDialog(
                                  context: context,
                                  builder: (BuildContext ctx) {
                                    return AlertDialog(
                                      title: const Text('Remove App?'),
                                      content: Text(
                                          'This will remove \'${app?.name}\' from Obtainium.${app?.installedVersion != null ? '\n\nNote that while Obtainium will no longer track its updates, the App will remain installed.' : ''}'),
                                      actions: [
                                        TextButton(
                                            onPressed: () {
                                              appsProvider
                                                  .removeApp(app!.id)
                                                  .then((_) {
                                                int count = 0;
                                                Navigator.of(context).popUntil(
                                                    (_) => count++ >= 2);
                                              });
                                            },
                                            child: const Text('Remove')),
                                        TextButton(
                                            onPressed: () {
                                              Navigator.of(context).pop();
                                            },
                                            child: const Text('Cancel'))
                                      ],
                                    );
                                  });
                            },
                      style: TextButton.styleFrom(
                          foregroundColor: Theme.of(context).errorColor,
                          surfaceTintColor: Theme.of(context).errorColor),
                      child: const Text('Remove'),
                    ),
                  ])),
          if (app?.currentDownloadId != null) const LinearProgressIndicator()
        ],
      ),
    );
  }
}