import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:news/utils/uiUtils.dart';

class Validators {
  //name validation check
  static String? nameValidation(String value, BuildContext context) {
    if (value.isEmpty) {
      return UiUtils.getTranslatedLabel(context, 'nameRequired');
    }
    if (value.length <= 1) {
      return UiUtils.getTranslatedLabel(context, 'nameLength');
    }
    return null;
  }

//email validation check
  static String? emailValidation(String value, BuildContext context) {
    if (value.isEmpty) {
      return UiUtils.getTranslatedLabel(context, 'emailRequired');
    } else if (!RegExp(r"[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)"
            r"*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+"
            r"[a-z0-9](?:[a-z0-9-]*[a-z0-9])?")
        .hasMatch(value)) {
      return UiUtils.getTranslatedLabel(context, 'emailValid');
    } else {
      return null;
    }
  }

//password validation check
  static String? passValidation(String value, BuildContext context) {
    if (value.isEmpty) {
      return UiUtils.getTranslatedLabel(context, 'pwdRequired');
    } else if (value.length <= 5) {
      return UiUtils.getTranslatedLabel(context, 'pwdLength');
    } else {
      return null;
    }
  }

  static String? mobValidation(String value, BuildContext context) {
    if (value.isEmpty) {
      return UiUtils.getTranslatedLabel(context, 'mblRequired');
    }
    if (value.length < 9 || value.length > 16) {
      return UiUtils.getTranslatedLabel(context, 'mblValid');
    }
    return null;
  }

  static String? titleValidation(String value, BuildContext context) {
    if (value.isEmpty) {
      return UiUtils.getTranslatedLabel(context, 'newsTitleReqLbl');
    } else if (value.length < 2) {
      return UiUtils.getTranslatedLabel(context, 'plzAddValidTitleLbl');
    }
    return null;
  }

  static String? youtubeUrlValidation(String value, BuildContext context) {
    if (value.isEmpty) {
      return UiUtils.getTranslatedLabel(context, 'urlReqLbl');
    } else {
      bool isValidURL = RegExp(r'^(((?:https?:)?\/\/)?((?:www|m)\.)?((?:youtube\.com|youtu.be))(\/(?:[\w\-]+\?v=|embed\/|v\/)?)([\w\-]+)(\S+)?)').hasMatch(value);
      if (!isValidURL) return UiUtils.getTranslatedLabel(context, 'plzValidUrlLbl');
    }

    return null;
  }

  static String? urlValidation(String value, BuildContext context) {
    bool? test;
    if (value.isEmpty) {
      return UiUtils.getTranslatedLabel(context, 'urlReqLbl');
    } else {
      validUrl(value).then((result) {
        test = result;
        if (test!) {
          return UiUtils.getTranslatedLabel(context, 'plzValidUrlLbl');
        }
      });
    }

    return null;
  }

  static Future<bool> validUrl(String value) async {
    await Dio().head(value).then((value) {
      return (value.statusCode == 200) ? false : true;
    });
    return false;
  }

  //name validation check
  static String? emptyFieldValidation(String value, String hintText, BuildContext context) {
    if (value.isEmpty) {
      switch (hintText) {
        case 'metaTitleLbl':
          return UiUtils.getTranslatedLabel(context, 'metaTitleRequired');
        case 'metaDescriptionLbl':
          return UiUtils.getTranslatedLabel(context, 'metaDescriptionRequired');
        case 'metaKeywordLbl':
          return UiUtils.getTranslatedLabel(context, 'metaKeywordRequired');
      }
    }
    return null;
  }

  static String? slugValidation(String value, BuildContext context) {
    if (value.isEmpty) {
      return UiUtils.getTranslatedLabel(context, 'slugRequired');
    } else if (!RegExp("^[a-z0-9]+(?:-[a-z0-9]+)*").hasMatch(value)) {
      return UiUtils.getTranslatedLabel(context, 'slugValid');
    } else {
      return null;
    }
  }
}