using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using NaiBa.Util.Helper;
using Newtonsoft.Json.Linq;

namespace NaiBa.Util.Extension
{
    public static partial class Extensions
    {
        public static bool IsNullOrEmpty(this object value)
        {
            if (value != null && !string.IsNullOrEmpty(value.ParseToString()))
            {
                return false;
            }
            else
            {
                return true;
            }
        }

        public static bool IsNullOrZero(this object value)
        {
            if (value == null || string.IsNullOrEmpty(value.ParseToString()) || value.ParseToString().Trim() == "0")
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        public static bool IsNumericType(this object value)
        {
            if (value == null)
            {
                return false;
            }
            switch (Type.GetTypeCode(value.GetType()))
            {
                case TypeCode.Byte:
                case TypeCode.SByte:
                case TypeCode.UInt16:
                case TypeCode.UInt32:
                case TypeCode.UInt64:
                case TypeCode.Int16:
                case TypeCode.Int32:
                case TypeCode.Int64:
                case TypeCode.Decimal:
                case TypeCode.Double:
                case TypeCode.Single:
                    return true;
                default:
                    return false;
            }
        }

        public static bool IsStringType(this object value)
        {
            if (value == null)
            {
                return false;
            }
            switch (Type.GetTypeCode(value.GetType()))
            {
                case TypeCode.String:
                    return true;
                default:
                    return false;
            }
        }

        public static bool IsNumber(this string value)
        {
            return RegexHelper.IsNumber(value);
        }

        public static bool IsAlphabet(this string value)
        {
            return RegexHelper.IsAlphabet(value);
        }

        public static bool IsAlphabetOrNumber(this string value)
        {
            return RegexHelper.IsAlphabetOrNumber(value);
        }

        public static bool IsJson(this string value)
        {
            return JsonHelper.IsJson(value);
        }

        public static bool IsJTokenNullOrEmpty(this JToken token)
        {
            return (token == null) ||
                   (token.Type == JTokenType.Array && !token.HasValues) ||
                   (token.Type == JTokenType.Object && !token.HasValues) ||
                   (token.Type == JTokenType.String && token.ToString() == string.Empty) ||
                   (token.Type == JTokenType.Null);
        }

        public static bool IsAjaxRequest(this Microsoft.AspNetCore.Http.HttpRequest request)
        {
            if (request == null)
                throw new ArgumentNullException("request");

            if (request.Headers != null)
                return request.Headers["X-Requested-With"] == "XMLHttpRequest";
            return false;
        }
    }
}