import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:obtainium/pages/app.dart';
import 'package:obtainium/providers/apps_provider.dart';
import 'package:obtainium/providers/settings_provider.dart';
import 'package:obtainium/providers/source_provider.dart';
import 'package:provider/provider.dart';
import 'package:url_launcher/url_launcher_string.dart';

class AddAppPage extends StatefulWidget {
  const AddAppPage({super.key});

  @override
  State<AddAppPage> createState() => _AddAppPageState();
}

class _AddAppPageState extends State<AddAppPage> {
  final _formKey = GlobalKey<FormState>();
  final urlInputController = TextEditingController();
  bool gettingAppInfo = false;

  @override
  Widget build(BuildContext context) {
    SourceProvider sourceProvider = SourceProvider();
    return Center(
      child: Form(
          key: _formKey,
          child: Column(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Container(),
              Padding(
                padding: const EdgeInsets.all(16),
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: [
                    TextFormField(
                      decoration: const InputDecoration(
                          hintText: 'https://github.com/Author/Project',
                          helperText: 'Enter the App source URL'),
                      controller: urlInputController,
                      validator: (value) {
                        if (value == null ||
                            value.isEmpty ||
                            Uri.tryParse(value) == null) {
                          return 'Please enter a supported source URL';
                        }
                        return null;
                      },
                    ),
                    Padding(
                      padding: const EdgeInsets.symmetric(vertical: 16.0),
                      child: ElevatedButton(
                        onPressed: gettingAppInfo
                            ? null
                            : () {
                                HapticFeedback.mediumImpact();
                                if (_formKey.currentState!.validate()) {
                                  setState(() {
                                    gettingAppInfo = true;
                                  });
                                  sourceProvider
                                      .getApp(urlInputController.value.text)
                                      .then((app) {
                                    var appsProvider =
                                        context.read<AppsProvider>();
                                    var settingsProvider =
                                        context.read<SettingsProvider>();
                                    if (appsProvider.apps.containsKey(app.id)) {
                                      throw 'App already added';
                                    }
                                    settingsProvider
                                        .getInstallPermission()
                                        .then((_) {
                                      appsProvider.saveApp(app).then((_) {
                                        urlInputController.clear();
                                        Navigator.push(
                                            context,
                                            MaterialPageRoute(
                                                builder: (context) =>
                                                    AppPage(appId: app.id)));
                                      });
                                    });
                                  }).catchError((e) {
                                    ScaffoldMessenger.of(context).showSnackBar(
                                      SnackBar(content: Text(e.toString())),
                                    );
                                  }).whenComplete(() {
                                    setState(() {
                                      gettingAppInfo = false;
                                    });
                                  });
                                }
                              },
                        child: const Text('Add'),
                      ),
                    ),
                  ],
                ),
              ),
              Column(crossAxisAlignment: CrossAxisAlignment.center, children: [
                const Text(
                  'Supported Sources:',
                  // style: TextStyle(fontWeight: FontWeight.bold),
                  // style: Theme.of(context).textTheme.bodySmall,
                ),
                const SizedBox(
                  height: 8,
                ),
                ...sourceProvider
                    .getSourceHosts()
                    .map((e) => GestureDetector(
                        onTap: () {
                          launchUrlString('https://$e',
                              mode: LaunchMode.externalApplication);
                        },
                        child: Text(
                          e,
                          style: const TextStyle(
                              decoration: TextDecoration.underline,
                              fontStyle: FontStyle.italic),
                        )))
                    .toList()
              ]),
              if (gettingAppInfo)
                const LinearProgressIndicator()
              else
                Container(),
            ],
          )),
    );
  }
}