using MiniWebApi.Network;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using Vinno.IUS.Common.Log;

namespace Vinno.vCloud.Disk
{
    public static class ApiExtends
    {
        private static ViewEngine viewEngine = new ViewEngine();
        /// <summary>
        /// 验证是否为空，空返回true
        /// </summary>
        /// <param name="context"></param>
        /// <param name="param"></param>
        /// <param name="paramName"></param>
        /// <param name="contentType"></param>
        /// <param name="pageName"></param>
        /// <returns></returns>
        public static bool VerificationIsEmpty(this WebApiHttpContext context, string param, string paramName, string contentType = "html", string pageName = "PageError.html")
        {
            bool verificationResult = false;
            var errorMsg = string.Format("Param {0} is empty", paramName);
            if (string.IsNullOrWhiteSpace(param))
            {
                context.PageResponse(contentType, pageName, new { ErrorMsg = errorMsg });
                verificationResult = true;
            }
            return verificationResult;
        }

        /// <summary>
        /// 验证是否包含特殊字符，包含返回true
        /// </summary>
        /// <param name="context"></param>
        /// <param name="param"></param>
        /// <param name="paramName"></param>
        /// <param name="contentType"></param>
        /// <param name="pageName"></param>
        /// <returns></returns>
        public static bool VerificationSpecialChar(this WebApiHttpContext context, string param, string paramName, string contentType = "html", string pageName = "PageError.html")
        {
            bool verificationResult = false;
            var errorMsg = string.Format("Param {0} are not allowed to have special characters", paramName);
            if (Regex.IsMatch(param, "[^0-9a-zA-Z]+"))
            {
                context.PageResponse(contentType, pageName, new { ErrorMsg = errorMsg });
                verificationResult = true;
            }
            return verificationResult;
        }

        /// <summary>
        /// 验证是否小于0 ，小于0返回true；
        /// </summary>
        /// <param name="context"></param>
        /// <param name="param"></param>
        /// <param name="paramName"></param>
        /// <param name="contentType"></param>
        /// <param name="pageName"></param>
        /// <returns></returns>
        public static bool VerificationLessThanZero(this WebApiHttpContext context, string param, string paramName, string contentType = "html", string pageName = "PageError.html")
        {
            bool verificationResult = false;
            var errorMsg = string.Format("Param {0} must greater than zero", paramName);
            double doubleTotalAmount;
            double.TryParse(param, out doubleTotalAmount);
            if (doubleTotalAmount <= 0)
            {
                context.PageResponse(contentType, pageName, new { ErrorMsg = errorMsg });
                verificationResult = true;
            }
            return verificationResult;
        }

        /// <summary>
        /// 写入响应数据
        /// </summary>
        /// <param name="context"></param>
        /// <param name="contentType"></param>
        /// <param name="pageName"></param>
        /// <param name="model"></param>
        /// <returns></returns>
        public static void PageResponse(this WebApiHttpContext context, string contentType, string pageName, object model)
        {
            switch (contentType)
            {
                case "html":
                    string html = Encoding.UTF8.GetString(viewEngine.GetSource(pageName, contentType, model).ToArray());
                    context.Response.ContentType = "text/html";
                    context.Response.Write(Encoding.UTF8.GetBytes(html));
                    break;
                case "json":
                    context.Response.Json(model);
                    break;
            }
        }

        /// <summary>
        /// 获取Get参数
        /// </summary>
        /// <param name="context"></param>
        /// <param name="keyName"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static string GetParam(this WebApiHttpContext context, string keyName, string defaultValue = "")
        {
            var param = context.Request.QueryString.Get(keyName).XssEncode();
            return !string.IsNullOrWhiteSpace(param) ? param : defaultValue;
        }

        /// <summary>
        /// 获取Post参数
        /// </summary>
        /// <param name="context"></param>
        /// <returns></returns>
        public static Dictionary<string, object> GetParams(this WebApiHttpContext context)
        {
            try
            {
                var postContent = context.Request.GetInputStreamValue();
                Dictionary<string, object> keyValuePairs = new Dictionary<string, object>();
                var uriParams = postContent;
                if (uriParams != null)
                {
                    var paramsArr = uriParams.Split('&');
                    foreach (string param in paramsArr)
                    {
                        var keyValue = param.Split('=');
                        var key = HttpUtility.UrlDecode(keyValue[0]).Replace("[]", "");
                        var value = keyValue.Length > 1 ? HttpUtility.UrlDecode(keyValue[1]) : string.Empty;
                        if (keyValuePairs.Keys.Contains(key))
                        {
                            if (keyValuePairs[key] is List<string> pairs)
                            {
                                pairs.Add(value);
                            }
                            else
                            {
                                List<string> newPairs = new List<string>();
                                var convertValue = keyValuePairs[key] as string;
                                newPairs.Add(convertValue);
                                newPairs.Add(value);
                                keyValuePairs[key] = newPairs;
                            }
                        }
                        else
                        {
                            keyValuePairs.Add(key, value);
                        }
                    }
                }

                return keyValuePairs;
            }
            catch (Exception ex)
            {
                Logger.WriteLineError("GetParams error：" + ex.Message + "|" + ex.StackTrace);
                return new Dictionary<string, object>();
            }
        }

        /// <summary>
        /// 获取Dictionary参数
        /// </summary>
        /// <param name="keyValuePairs"></param>
        /// <param name="keyName"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static string GetStringValue(this Dictionary<string, object> keyValuePairs, string keyName, string defaultValue = "")
        {
            return GetValue(keyValuePairs, keyName, defaultValue);
        }

        /// <summary>
        /// 获取Dictionary参数
        /// </summary>
        /// <param name="keyValuePairs"></param>
        /// <param name="keyName"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static List<string> GetArrayValue(this Dictionary<string, object> keyValuePairs, string keyName)
        {
            return GetArrayValueData(keyValuePairs, keyName);
        }

        /// <summary>
        /// 获取Dictionary参数
        /// </summary>
        /// <param name="keyValuePairs"></param>
        /// <param name="keyName"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        private static List<string> GetArrayValueData(Dictionary<string, object> keyValuePairs, string keyName)
        {
            var list = GetValue(keyValuePairs, keyName, new List<string>());
            if (list == null || list.Count == 0)
            {
                var onlyValue = GetValue(keyValuePairs, keyName, string.Empty);
                if (!onlyValue.IsEmpty())
                {
                    list = new List<string> { onlyValue };
                }
            }
            return list;
        }

        /// <summary>
        /// 获取Dictionary参数
        /// </summary>
        /// <param name="keyValuePairs"></param>
        /// <param name="keyName"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static T GetValue<T>(this Dictionary<string, object> keyValuePairs, string keyName, T defaultValue = null) where T : class
        {
            T paramValue = defaultValue ?? default(T);
            try
            {
                paramValue = (keyValuePairs[keyName] as T);
                if (paramValue == null)
                {
                    paramValue = defaultValue;
                }
            }
            catch(Exception ex)
            {
                Logger.WriteLineError("GetValue error：" + ex.Message + "|" + ex.StackTrace);
            }

            return paramValue;
        }


        /// <summary>
        /// 获取SortedDictionary参数
        /// </summary>
        /// <param name="keyValuePairs"></param>
        /// <param name="keyName"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static string GetValue(this SortedDictionary<string, object> keyValuePairs, string keyName, string defaultValue = "")
        {
            string paramValue = defaultValue;
            try
            {
                paramValue = keyValuePairs[keyName].ToStringEx().XssEncode();
                if (string.IsNullOrWhiteSpace(paramValue))
                {
                    paramValue = defaultValue;
                }
            }
            catch (Exception ex)
            {
                Logger.WriteLineError("GetValue error：" + ex.Message + "|" + ex.StackTrace);
            }

            return paramValue;
        }

        /// <summary>
        /// ToString扩展函数
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <param name="defaultValue"></param>
        /// <returns></returns>
        public static string ToStringEx<T>(this T obj, string defaultValue = "")
        {
            if (obj == null)
            {
                return defaultValue;
            }
            return obj.ToString();
        }
    }
}