using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using Common;
using LitJson;
using Model;
using Vo.Admin;

namespace Util.Logic
{
    public class ApiTestHelper
    {
        /// <summary>
        /// API源请求节点
        /// </summary>
        /// <param name="apiInfoData">接口数据</param>
        /// <param name="requestEncrypt">加密方式</param>
        /// <param name="requestEncryptParam">加密参数</param>
        /// <param name="requestParams">请求参数</param>
        /// <param name="responseParams">响应参数</param>
        /// <returns>HTTP响应</returns>
        public static string apiTestRequest(ApiTreeInfo apiInfoData, string requestEncrypt, string requestEncryptParam, Dictionary<string, string> requestParams, Dictionary<string, string> headers)
        {
            // 收集请求参数
            Dictionary<string, string> requestParamsDict = new Dictionary<string, string>();
            foreach (var param in requestParams)
            {
                string label = param.Key;
                string value = param.Value;
                requestParamsDict.Add(label, value);
            }

            string requestMethod = apiInfoData.apiMethod; // HTTP方法
            string requestUrl = apiInfoData.apiPath; // HTTP请求URL
            Utils.WriteLog("请求地址:" + requestUrl, "请求接口");
            Utils.WriteLog("请求方式:" + requestMethod, "请求接口");

            string response = ""; // HTTP响应
            
            if (requestMethod == "GET") // GET请求
            {
                // 处理GET请求参数
                string requestParamString = Newtonsoft.Json.JsonConvert.SerializeObject(requestParamsDict);
                Utils.WriteLog("请求参数:" + requestParamString, "请求接口");
                if (requestEncrypt != "NO")
                {
                    requestParamString = Encrypt(requestParamString, requestEncrypt, requestEncryptParam);
                    response += requestParamString + "|";
                }
                Utils.WriteLog("请求参数:" + requestParamString, "请求接口");
                response += Function.GetWebRequest(requestUrl + "?value=" + requestParamString, headers, true); // 发送GET请求
            }
            else if (requestMethod == "POST" || requestMethod == "PUT") // POST/PUT请求
            {
                // 处理POST/PUT请求参数                
                string requestBody = Newtonsoft.Json.JsonConvert.SerializeObject(requestParamsDict);
                Utils.WriteLog("请求参数:" + requestBody, "请求接口");
                if (requestEncrypt != "NO")
                {
                    requestBody = Encrypt(requestBody, requestEncrypt, requestEncryptParam);
                    response += requestBody + "|";
                }
                Utils.WriteLog("请求参数:" + requestBody, "请求接口");
                response += Function.PostWebRequest(requestUrl, requestBody, headers, requestMethod, "application/json", true); // 发送POST/PUT请求
            }
            else if (requestMethod == "DELETE") // DELETE请求
            { 
                // 处理DELETE请求参数
                string requestValue = "0";
                if(requestParamsDict.Keys.Count > 0)
                {
                    requestValue = requestParamsDict[requestParamsDict.Keys?.FirstOrDefault() ?? ""];
                }
                Utils.WriteLog("请求参数:" + requestValue, "请求接口");
                if (requestEncrypt != "NO")
                {
                    requestValue = Encrypt(requestValue, requestEncrypt, requestEncryptParam);
                    response += requestValue + "|";
                }
                Utils.WriteLog("请求参数:" + requestValue, "请求接口");
                requestUrl = Regex.Replace(requestUrl, "\\{.*?\\}", requestValue);
                Utils.WriteLog("请求地址:" + requestUrl, "请求接口");
                response += Function.DeleteWithBody(requestUrl, "", headers, true); // 发送DELETE请求
            }
            Utils.WriteLog("返回数据:" + response, "请求接口");
            // 处理POST/PUT请求响应
            return response;
        }

        /// <summary>
        /// 加密
        /// </summary>
        /// <param name="str">待加密字符串</param>
        /// <param name="encryptType">加密类型</param>
        /// <param name="encryptParam">加密参数</param>
        /// <returns>加密后字符串</returns>
        private static string Encrypt(string str, string encryptType, string encryptParam)
        {
            if (encryptType == "AES")
            {
                JsonData jsonData = JsonMapper.ToObject(encryptParam);
                return AesEncrypt(str, jsonData["key"].ToString(), jsonData["iv"].ToString(), jsonData["mode"].ToString(), jsonData["padding"].ToString());
            }
            else if (encryptType == "RSA")
            {
                JsonData jsonData = JsonMapper.ToObject(encryptParam);
                return RsaEncrypt(str, jsonData["key"].ToString(), jsonData["kind"].ToString());
            }
            else if (encryptType == "DES")
            {
                JsonData jsonData = JsonMapper.ToObject(encryptParam);
                return Dbconn.DesEncrypt(str, jsonData["key"].ToString());
            }
            return "";
        }

        /// <summary>
        /// AES加密
        /// </summary>
        /// <param name="str">待加密字符串</param>
        /// <param name="key">密钥</param>
        /// <param name="iv">初始向量</param>
        /// <param name="mode">加密模式</param>
        /// <param name="padding">填充方式</param>
        /// <returns>加密后字符串</returns>
        public static string AesEncrypt(string str, string key, string iv, string mode = "CBC", string padding = "PKCS7")
        {
            if (string.IsNullOrEmpty(str)) return null;
            Byte[] toEncryptArray = Encoding.UTF8.GetBytes(str);

            CipherMode cipherMode = CipherMode.CBC;
            PaddingMode paddingMode = PaddingMode.PKCS7;
            if (mode == "CBC") cipherMode = CipherMode.CBC;
            if (mode == "ECB") cipherMode = CipherMode.ECB;
            if (mode == "CFB") cipherMode = CipherMode.CFB;
            if (mode == "CTS") cipherMode = CipherMode.CTS;
            if (padding == "PKCS7") paddingMode = PaddingMode.PKCS7;
            if (padding == "None") paddingMode = PaddingMode.None;
            if (padding == "Zeros") paddingMode = PaddingMode.Zeros;
            if (padding == "ISO10126") paddingMode = PaddingMode.ISO10126;
            if (padding == "ANSIX923") paddingMode = PaddingMode.ANSIX923;

            System.Security.Cryptography.RijndaelManaged rm = new System.Security.Cryptography.RijndaelManaged
            {
                Key = Encoding.UTF8.GetBytes(key),
                IV = Encoding.UTF8.GetBytes(iv),
                Mode = cipherMode,
                Padding = paddingMode
            };
            System.Security.Cryptography.ICryptoTransform cTransform = rm.CreateEncryptor();
            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            string jsonData = Convert.ToBase64String(resultArray, 0, resultArray.Length);
            return Convert.ToBase64String(Encoding.UTF8.GetBytes(jsonData));
        }

        public static string RsaEncrypt(string data, string key, string kind)
        {
            if (kind == "privateKey")
            {
                var toDecryptArray = Convert.FromBase64String(data);
                var toKey = Convert.FromBase64String(key);
                var rsa = RSA.Create();
                rsa.ImportPkcs8PrivateKey(toKey, out _);
                var encryptData = rsa.Encrypt(toDecryptArray, RSAEncryptionPadding.Pkcs1);
                var result = Convert.ToBase64String(encryptData);
                return result;
            }
            else if (kind == "publicKey")
            {
                var toDecryptArray = Convert.FromBase64String(data);
                var toKey = Convert.FromBase64String(key);
                var rsa = RSA.Create();
                rsa.ImportRSAPublicKey(toKey, out _);
                var encryptData = rsa.Encrypt(toDecryptArray, RSAEncryptionPadding.Pkcs1);
                var result = Convert.ToBase64String(encryptData);
                return result;
            }
            if (kind == "privateKey2")
            {
                return new RSAHelper(RSAType.RSA, System.Text.Encoding.UTF8, key).Encrypt(data);
            }
            else if (kind == "publicKey2")
            {
                return new RSAHelper(RSAType.RSA, System.Text.Encoding.UTF8, "", key).Encrypt(data);
            }
            return "";
        }


        /// <summary>
        /// 解密
        /// </summary>
        /// <param name="str">待解密字符串</param>
        /// <param name="decryptType">解密类型</param>
        /// <param name="decryptParam">解密参数</param>
        /// <returns>解密后字符串</returns>
        private static string Decrypt(string str, string decryptType, string decryptParam)
        {
            if (decryptType == "AES")
            {
                JsonData jsonData = JsonMapper.ToObject(decryptParam);
                return AesDecrypt(str, jsonData["key"].ToString(), jsonData["iv"].ToString(), jsonData["mode"].ToString(), jsonData["padding"].ToString());
            }
            else if (decryptType == "RSA")
            {
                JsonData jsonData = JsonMapper.ToObject(decryptParam);
                return RsaDecrypt(str, jsonData["key"].ToString(), jsonData["kind"].ToString());
            }
            else if (decryptType == "DES")
            {
                JsonData jsonData = JsonMapper.ToObject(decryptParam);
                return Dbconn.DesDecrypt(str, jsonData["key"].ToString());
            }
            return "";
        }

        /// <summary>
        /// AES解密
        /// </summary>
        /// <param name="str">待解密字符串</param>
        /// <param name="key">密钥</param>
        /// <param name="iv">初始向量</param>
        /// <param name="mode">解密模式</param>
        /// <param name="padding">填充方式</param>
        /// <returns>解密后字符串</returns>
        public static string AesDecrypt(string str, string key, string iv, string mode = "CBC", string padding = "PKCS7")
        {
            if (string.IsNullOrEmpty(str)) return null;
            Byte[] toEncryptArray = Encoding.UTF8.GetBytes(str);

            CipherMode cipherMode = CipherMode.CBC;
            PaddingMode paddingMode = PaddingMode.PKCS7;
            if (mode == "CBC") cipherMode = CipherMode.CBC;
            if (mode == "ECB") cipherMode = CipherMode.ECB;
            if (mode == "CFB") cipherMode = CipherMode.CFB;
            if (mode == "CTS") cipherMode = CipherMode.CTS;
            if (padding == "PKCS7") paddingMode = PaddingMode.PKCS7;
            if (padding == "None") paddingMode = PaddingMode.None;
            if (padding == "Zeros") paddingMode = PaddingMode.Zeros;
            if (padding == "ISO10126") paddingMode = PaddingMode.ISO10126;
            if (padding == "ANSIX923") paddingMode = PaddingMode.ANSIX923;

            System.Security.Cryptography.RijndaelManaged rm = new System.Security.Cryptography.RijndaelManaged
            {
                Key = Encoding.UTF8.GetBytes(key),
                IV = Encoding.UTF8.GetBytes(iv),
                Mode = cipherMode,
                Padding = paddingMode
            };
            System.Security.Cryptography.ICryptoTransform cTransform = rm.CreateDecryptor();
            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
            return Encoding.UTF8.GetString(resultArray);
        }

        public static string RsaDecrypt(string data, string key, string kind)
        {
            if (kind == "privateKey")
            {
                var toDecryptArray = Convert.FromBase64String(data);
                var toKey = Convert.FromBase64String(key);
                var rsa = RSA.Create();
                rsa.ImportPkcs8PrivateKey(toKey, out _);
                var encryptData = rsa.Decrypt(toDecryptArray, RSAEncryptionPadding.Pkcs1);
                var result = Convert.ToBase64String(encryptData);
                return result;
            }
            else if (kind == "publicKey")
            {
                var toDecryptArray = Convert.FromBase64String(data);
                var toKey = Convert.FromBase64String(key);
                var rsa = RSA.Create();
                rsa.ImportRSAPublicKey(toKey, out _);
                var encryptData = rsa.Decrypt(toDecryptArray, RSAEncryptionPadding.Pkcs1);
                var result = Convert.ToBase64String(encryptData);
                return result;
            }
            if (kind == "privateKey2")
            {
                return new RSAHelper(RSAType.RSA, System.Text.Encoding.UTF8, key).Decrypt(data);
            }
            else if (kind == "publicKey2")
            {
                return new RSAHelper(RSAType.RSA, System.Text.Encoding.UTF8, "", key).Decrypt(data);
            }
            return "";
        }
    }
}