import 'dart:io';

import 'package:flutter/material.dart';
import 'package:photo_manager/photo_manager.dart';
import 'package:photos/services/sync_service.dart';
import 'package:photos/ui/common_elements.dart';

class GrantPermissionsWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Center(
      child: SingleChildScrollView(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Image.asset(
              "assets/gallery.png",
              height: 160,
            ),
            Padding(padding: EdgeInsets.all(24)),
            Text.rich(
              TextSpan(
                children: <TextSpan>[
                  TextSpan(
                    text: "ente",
                    style: TextStyle(
                      fontWeight: FontWeight.bold,
                      fontFamily: 'Montserrat',
                      fontSize: 16,
                    ),
                  ),
                  TextSpan(
                    text: " needs your permission",
                    style: TextStyle(
                      fontSize: 16,
                    ),
                  ),
                ],
              ),
              textAlign: TextAlign.center,
            ),
            Padding(padding: EdgeInsets.all(2)),
            Text(
              "to access your gallery",
              style: TextStyle(fontSize: 16),
            ),
            Padding(padding: const EdgeInsets.all(24)),
            Container(
              width: double.infinity,
              padding: const EdgeInsets.fromLTRB(64, 0, 64, 0),
              child: button(
                "grant permission",
                fontSize: 16,
                onPressed: () async {
                  final state = await PhotoManager.requestPermissionExtend();
                  if (state == PermissionState.authorized ||
                      state == PermissionState.limited) {
                    await SyncService.instance.onPermissionGranted(state);
                  } else if (state == PermissionState.denied) {
                    AlertDialog alert = AlertDialog(
                      title: Text("please grant permissions"),
                      content: Text(
                          "ente can encrypt and preserve files only if you grant access to them"),
                      actions: [
                        TextButton(
                          child: Text(
                            "ok",
                            style: TextStyle(
                              color: Theme.of(context).buttonColor,
                            ),
                          ),
                          onPressed: () {
                            Navigator.of(context, rootNavigator: true)
                                .pop('dialog');
                            if (Platform.isIOS) {
                              PhotoManager.openSetting();
                            }
                          },
                        ),
                      ],
                    );

                    showDialog(
                      context: context,
                      builder: (BuildContext context) {
                        return alert;
                      },
                      barrierColor: Colors.black87,
                    );
                  }
                },
              ),
            ),
            Padding(padding: const EdgeInsets.all(50)),
            Text(
              "we value your privacy",
              style: TextStyle(
                color: Colors.white30,
              ),
            ),
            Padding(padding: const EdgeInsets.all(12)),
            Text(
              "the files you choose to back up",
              style: TextStyle(
                color: Colors.white30,
              ),
            ),
            Padding(padding: const EdgeInsets.all(2)),
            Text(
              "will be end-to-end encrypted",
              style: TextStyle(
                color: Colors.white30,
              ),
            ),
          ],
        ),
      ),
    );
  }
}