import 'package:flutter/material.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:peach/config/_.dart';

/*
 * 动态申请App的权限
 */
class AuthorityApplication {
  /// App需要动态申请的权限
  static List<Permission> permissionList = [ Permission.storage, Permission.photos ];

  static Future<bool> init(BuildContext context) async {
    if (Config.isAndroid) {
      Map<Permission, PermissionStatus> status = await permissionList.request();
      if (status[Permission.storage].isGranted) {
        print("用户同意了权限");
        return true;
      } else if (status[Permission.storage].isDenied) {
        print("用户拒绝了权限");
        AuthorityApplication.ShowTips(
          context: context, content: "请允许App获取权限，否则App功能不能正常使用！",
          isShowcancel: false,
          confirmCall: () async {
            AuthorityApplication.init(context);
          },
        );
        return false;
      } else if (status[Permission.storage].isPermanentlyDenied) {
        print("用户永久拒绝了权限");
        AuthorityApplication.ShowTips(
          context: context, content: "您禁用了应用的必要权限，请到设置里开启！",
          isShowcancel: false, confirmText: '打开设置',
          confirmCall: () async {
            await openAppSettings();
          },
        );
        return false;
      }
    }
  }

  static Future ShowTips({
    BuildContext context, String content,
    bool isShowcancel: true, Function confirmCall,
    confirmText = "重新请求", title = '提示'
  }) async {
    await showDialog(
        context: context,
        barrierDismissible: false,
        builder: (context) => WillPopScope(
          onWillPop: () async => false,
          child: AlertDialog(
            title: Text(title),
            content: Text(content),
            actions: <Widget>[
              isShowcancel
                  ? FlatButton(
                  child: Text('取消', style: TextStyle(color: ColorConfig.NoActiveColor),),
                  onPressed: () {
                    Navigator.of(context).pop();
                  })
                  : Text(''),
              FlatButton(
                  child: Text(confirmText, style: TextStyle(color: ColorConfig.ThemeColor),),
                  onPressed: () async {
                    confirmCall();
                    Navigator.of(context).pop();
                  }),
            ],
          ),
        )
     );
  }
}