using System;
using System.Runtime.InteropServices;
using System.Text;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace JiangSuElectronicCertificate
{
    /// <summary>
    /// 江苏医保电子凭证解码接口
    /// 基于江苏医保接口规范v0.9.9.15和HeaSecReadInfo.dll实现
    /// 符合国家医保电子凭证业务标准动态库交互规范2021-11-12
    /// </summary>
    public class JiangSuEcDecoder
    {
        #region DLL导入声明

        /// <summary>
        /// 1.14.1 初始化
        /// </summary>
        /// <param name="pInitInfo">JSON格式的初始化参数</param>
        /// <param name="pErrMsg">错误信息输出缓冲区</param>
        /// <returns>0-成功，其他-失败</returns>
        [DllImport("HeaSecReadInfo.dll", EntryPoint = "Init", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private extern static Int32 Init(string pInitInfo, StringBuilder pErrMsg);

        /// <summary>
        /// 1.14.6 电子凭证解码
        /// </summary>
        /// <param name="pInData">输入数据（JSON格式）</param>
        /// <param name="pOutData">输出数据缓冲区</param>
        /// <returns>0-成功，其他-失败</returns>
        [DllImport("HeaSecReadInfo.dll", EntryPoint = "EcQuery", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private extern static Int32 EcQuery(string pInData, StringBuilder pOutData);

        #endregion

        #region 配置类

        /// <summary>
        /// 江苏医保配置信息
        /// </summary>
        public class JiangSuConfig
        {
            /// <summary>
            /// 服务器IP地址（根据具体医院配置修改）
            /// </summary>
            public string IP { get; set; } = "10.61.165.3";

            /// <summary>
            /// 服务器端口号
            /// </summary>
            public int PORT { get; set; } = 8086;

            /// <summary>
            /// 超时时间（秒）
            /// </summary>
            public int TIMEOUT { get; set; } = 30;

            /// <summary>
            /// 日志路径（根据项目实际路径修改）
            /// </summary>
            public string LOG_PATH { get; set; } = "C:\\logs\\";

            /// <summary>
            /// 电子凭证解码URL（根据具体医院配置修改）
            /// </summary>
            public string EC_URL { get; set; } = "http://10.58.33.207:10086/localcfc/api/hsecfc/localQrCodeQuery";

            /// <summary>
            /// 卡片通道类型
            /// </summary>
            public string CARD_PASSTYPE { get; set; } = "2";

            /// <summary>
            /// API名称
            /// </summary>
            public string API_NAME { get; set; } = "hssServives";

            /// <summary>
            /// API版本
            /// </summary>
            public string API_VERSION { get; set; } = "1.0.0";

            /// <summary>
            /// 访问密钥（根据具体医院申请的密钥修改）
            /// </summary>
            public string ACCESS_KEY { get; set; } = "090ea4c914324ee38b6978365df46a80";

            /// <summary>
            /// 秘钥（根据具体医院申请的密钥修改）
            /// </summary>
            public string SECRETKEY { get; set; } = "CMgTEMfftMP0EMMoliOs65wZmv8=";

            /// <summary>
            /// 机构编号（根据具体医院的医保定点编号修改）
            /// </summary>
            public string ORG_ID { get; set; } = "H32132200561";

            /// <summary>
            /// 扩展参数
            /// </summary>
            public string EXT { get; set; } = "{}";

            /// <summary>
            /// 地区编码
            /// </summary>
            public string AREA_CODE { get; set; } = "321322";

            /// <summary>
            /// 转换为JSON格式
            /// </summary>
            /// <returns>JSON字符串</returns>
            public string ToJson()
            {
                var config = new
                {
                    IP = this.IP,
                    PORT = this.PORT,
                    TIMEOUT = this.TIMEOUT,
                    LOG_PATH = this.LOG_PATH,
                    EC_URL = this.EC_URL,
                    CARD_PASSTYPE = this.CARD_PASSTYPE,
                    API_NAME = this.API_NAME,
                    API_VERSION = this.API_VERSION,
                    ACCESS_KEY = this.ACCESS_KEY,
                    SECRETKEY = this.SECRETKEY,
                    ORG_ID = this.ORG_ID,
                    EXT = this.EXT,
                    AREA_CODE = this.AREA_CODE
                };

                return JsonConvert.SerializeObject(config, Formatting.None);
            }
        }

        #endregion

        #region 私有变量

        private static bool isInitialized = false;
        private static JiangSuConfig currentConfig = null;

        #endregion

        #region 公共方法

        /// <summary>
        /// 初始化江苏医保系统
        /// </summary>
        /// <param name="config">配置信息，为null时使用默认配置</param>
        /// <returns>初始化结果</returns>
        public static JObject Initialize(JiangSuConfig config = null)
        {
            var result = new JObject();

            try
            {
                // 使用传入的配置或默认配置
                if (config == null)
                {
                    config = new JiangSuConfig();
                }

                currentConfig = config;

                // 准备初始化参数
                string initParams = config.ToJson();

                // 准备错误信息缓冲区
                StringBuilder errorBuffer = new StringBuilder(1024);

                // 调用DLL初始化函数
                int initResult = Init(initParams, errorBuffer);

                if (initResult == 0)
                {
                    isInitialized = true;
                    result["success"] = true;
                    result["code"] = 200;
                    result["message"] = "江苏医保系统初始化成功";
                    result["device"] = "江苏医保电子凭证解码器";
                    result["config"] = JObject.Parse(initParams);
                    result["timestamp"] = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
                }
                else
                {
                    isInitialized = false;
                    string errorMessage = errorBuffer.ToString();

                    result["success"] = false;
                    result["code"] = 1000 + initResult;
                    result["message"] = $"江苏医保系统初始化失败，错误码: {initResult}";
                    result["device"] = "江苏医保电子凭证解码器";
                    result["dllErrorCode"] = initResult;
                    result["dllErrorMessage"] = errorMessage;
                }
            }
            catch (Exception ex)
            {
                isInitialized = false;
                result["success"] = false;
                result["code"] = 1001;
                result["message"] = $"江苏医保系统初始化异常: {ex.Message}";
                result["device"] = "江苏医保电子凭证解码器";
                result["exception"] = ex.GetType().Name;
            }

            return result;
        }

        /// <summary>
        /// 江苏医保电子凭证解码
        /// </summary>
        /// <param name="businessType">业务类型编码（默认01101门诊挂号）</param>
        /// <param name="operatorId">收款员编号</param>
        /// <param name="operatorName">收款员姓名</param>
        /// <param name="officeId">医保科室编号</param>
        /// <param name="officeName">科室名称</param>
        /// <returns>解码结果</returns>
        public static JObject DecodeElectronicCertificate(
            string businessType = "01101", 
            string operatorId = "system001", 
            string operatorName = "系统管理员", 
            string officeId = "32760", 
            string officeName = "医保科")
        {
            var result = new JObject();

            try
            {
                // 检查初始化状态
                if (!isInitialized)
                {
                    // 自动初始化
                    var autoInitResult = Initialize();
                    if (!(bool)autoInitResult["success"])
                    {
                        result["success"] = false;
                        result["code"] = 1002;
                        result["message"] = "江苏医保系统未初始化，电子凭证解码失败";
                        result["device"] = "江苏医保电子凭证解码器";
                        result["autoInitError"] = autoInitResult["message"];
                        result["type"] = "qrcode";
                        return result;
                    }
                }

                // 获取当前配置
                if (currentConfig == null)
                {
                    result["success"] = false;
                    result["code"] = 1003;
                    result["message"] = "江苏医保配置信息为空";
                    result["device"] = "江苏医保电子凭证解码器";
                    result["type"] = "qrcode";
                    return result;
                }

                // 按照江苏医保接口规范1.14.6构造输入参数
                var inputData = new
                {
                    data = new
                    {
                        orgId = currentConfig.ORG_ID,           // 定点编号
                        businessType = businessType,            // 用码业务类型
                        operatorId = operatorId,               // 收款员编号
                        operatorName = operatorName,           // 收款员姓名
                        officeId = officeId,                   // 医保科室编号
                        officeName = officeName                // 科室名称
                    },
                    transType = "ec.query",                     // 固定值：ec.query
                    orgId = currentConfig.ORG_ID               // 定点编号
                };

                // JSON序列化输入参数
                string jsonInput = JsonConvert.SerializeObject(inputData, Formatting.None);

                // 按照规范分配8192字节输出缓冲区
                StringBuilder outputBuffer = new StringBuilder(8192);

                // 调用江苏医保DLL的EcQuery函数
                int dllResult = EcQuery(jsonInput, outputBuffer);

                if (dllResult == 0)
                {
                    // 解析DLL返回的JSON数据
                    string responseJson = outputBuffer.ToString();
                    
                    if (string.IsNullOrEmpty(responseJson))
                    {
                        result["success"] = false;
                        result["code"] = 1004;
                        result["message"] = "电子凭证解码返回数据为空";
                        result["device"] = "江苏医保电子凭证解码器";
                        result["type"] = "qrcode";
                        return result;
                    }

                    // 解析江苏医保返回的JSON数据
                    var jiangsuResponse = JObject.Parse(responseJson);
                    
                    // 检查江苏医保接口返回的code字段
                    int responseCode = (int)(jiangsuResponse["code"] ?? -1);
                    
                    if (responseCode == 0)
                    {
                        // 成功：提取患者信息
                        var patientData = jiangsuResponse["data"];
                        
                        if (patientData != null)
                        {
                            result["success"] = true;
                            result["code"] = 200;
                            result["message"] = "江苏医保电子凭证解码成功";
                            result["device"] = "江苏医保电子凭证解码器";
                            result["type"] = "qrcode";
                            result["originalType"] = "jiangsu_ec";
                            result["timestamp"] = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
                            
                            // 按照文档规范提取患者信息
                            var patientInfo = new
                            {
                                idNo = patientData["idNo"]?.ToString() ?? "",                    // 身份证号
                                userName = patientData["userName"]?.ToString() ?? "",            // 姓名
                                idType = patientData["idType"]?.ToString() ?? "",               // 证件类型
                                ecToken = patientData["ecToken"]?.ToString() ?? "",             // 令牌
                                insuOrg = patientData["insuOrg"]?.ToString() ?? "",             // 参保地区编码
                                ecIndexNo = patientData["ecIndexNo"]?.ToString() ?? "",         // 电子凭证索引号
                                gender = patientData["gender"]?.ToString() ?? "",                // 性别
                                birthday = patientData["birthday"]?.ToString() ?? "",            // 出生日期
                                nationality = patientData["nationality"]?.ToString() ?? "",      // 国籍
                                email = patientData["email"]?.ToString() ?? "",                  // 邮箱
                                extra = patientData["extra"]?.ToString() ?? ""                   // 扩展参数
                            };
                            
                            // 按照泰和医院格式构造data字段（包含code/data/message结构）
                            var dllResponseFormat = new
                            {
                                code = 0,
                                data = patientInfo,
                                message = "交易成功"
                            };
                            result["data"] = JsonConvert.SerializeObject(dllResponseFormat);
                            
                            // 保存原始江苏医保返回数据（用于调试和日志）
                            result["jiangsuOriginalData"] = responseJson;
                            result["businessType"] = businessType;
                            result["interfaceVersion"] = "v0.9.9.15";
                        }
                        else
                        {
                            result["success"] = false;
                            result["code"] = 1005;
                            result["message"] = "电子凭证解码成功，但患者数据为空";
                            result["device"] = "江苏医保电子凭证解码器";
                            result["type"] = "qrcode";
                            result["jiangsuOriginalData"] = responseJson;
                        }
                    }
                    else
                    {
                        // 江苏医保接口返回失败
                        string errorMessage = jiangsuResponse["message"]?.ToString() ?? "电子凭证解码失败";
                        
                        result["success"] = false;
                        result["code"] = 2000 + responseCode;  // 使用2xxx系列表示江苏医保接口错误
                        result["message"] = $"江苏医保电子凭证解码失败: {errorMessage}";
                        result["device"] = "江苏医保电子凭证解码器";
                        result["type"] = "qrcode";
                        result["jiangsuErrorCode"] = responseCode;
                        result["jiangsuErrorMessage"] = errorMessage;
                        result["jiangsuOriginalData"] = responseJson;
                        result["businessType"] = businessType;
                    }
                }
                else
                {
                    // DLL函数调用失败
                    string errorInfo = outputBuffer.ToString();
                    
                    result["success"] = false;
                    result["code"] = 3000 + dllResult;  // 使用3xxx系列表示DLL调用错误
                    result["message"] = $"江苏医保DLL调用失败，错误码: {dllResult}";
                    result["device"] = "江苏医保电子凭证解码器";
                    result["type"] = "qrcode";
                    result["dllErrorCode"] = dllResult;
                    result["dllErrorMessage"] = errorInfo;
                    result["businessType"] = businessType;
                    result["suggestion"] = GetEcQueryErrorSuggestion(dllResult);
                }
            }
            catch (JsonException jsonEx)
            {
                result["success"] = false;
                result["code"] = 1006;
                result["message"] = $"电子凭证解码数据解析异常: {jsonEx.Message}";
                result["device"] = "江苏医保电子凭证解码器";
                result["type"] = "qrcode";
                result["exception"] = jsonEx.GetType().Name;
                result["businessType"] = businessType;
            }
            catch (Exception ex)
            {
                result["success"] = false;
                result["code"] = 1007;
                result["message"] = $"电子凭证解码系统异常: {ex.Message}";
                result["device"] = "江苏医保电子凭证解码器";
                result["type"] = "qrcode";
                result["exception"] = ex.GetType().Name;
                result["businessType"] = businessType;
            }

            return result;
        }

        /// <summary>
        /// 检查业务类型编码是否有效
        /// </summary>
        /// <param name="businessType">业务类型编码</param>
        /// <returns>是否有效</returns>
        public static bool IsValidBusinessType(string businessType)
        {
            if (string.IsNullOrEmpty(businessType) || businessType.Length != 5)
                return false;

            // 有效的业务类型列表（根据国家医保电子凭证业务标准）
            string[] validTypes = {
                "01101", // 医院-挂号
                "01102", // 医院-住院建档
                "01103", // 医院-入院登记
                "01104", // 医院-缴纳预缴金
                "01201", // 医院-问诊
                "01202", // 医院-预约检查
                "01203", // 医院-检查
                "01204", // 医院-治疗
                "01301", // 医院-结算
                "01302", // 医院-取药
                "01303", // 医院-取报告
                "01304", // 医院-打印票据和清单
                "01305", // 医院-病历材料复印
                "01306", // 医院-诊间核验身份
                "02121", // 药店-药店购药
                "02122", // 药店-下载外购处方
                "02123", // 药店-特殊门诊
                "02124", // 药店-药师审核处方
                "03131", // 医疗类APP-线上身份认证
                "03132", // 医疗类APP-线上结算
                "05101", // 柜台-线下修改密码
                "05151"  // 柜台-医保业务办理
            };

            return Array.IndexOf(validTypes, businessType) >= 0;
        }

        #endregion

        #region 私有方法

        /// <summary>
        /// 获取电子凭证查询错误建议
        /// </summary>
        /// <param name="errorCode">错误码</param>
        /// <returns>错误建议</returns>
        private static string GetEcQueryErrorSuggestion(int errorCode)
        {
            switch (errorCode)
            {
                case -1:
                    return "请检查网络连接和服务器配置";
                case -2:
                    return "请检查输入参数是否正确";
                case -3:
                    return "请求超时，请稍后重试";
                case -4:
                    return "权限验证失败，请检查密钥配置";
                case -5:
                    return "请求地址无效，请检查EC_URL配置";
                default:
                    return "请联系技术支持或查看详细错误信息";
            }
        }

        #endregion
    }

    #region Web API控制器示例

    /// <summary>
    /// 江苏医保电子凭证Web API控制器示例
    /// 可以直接集成到ASP.NET Web API项目中
    /// </summary>
    public class JiangSuEcController : System.Web.Http.ApiController
    {
        /// <summary>
        /// 电子凭证解码接口
        /// POST /api/jiangsuec/decode
        /// </summary>
        /// <param name="request">请求参数</param>
        /// <returns>解码结果</returns>
        [System.Web.Http.HttpPost]
        [System.Web.Http.Route("api/jiangsuec/decode")]
        public JObject Decode([System.Web.Http.FromBody] dynamic request)
        {
            try
            {
                string businessType = request?.businessType ?? "01101";
                string operatorId = request?.operatorId ?? "system001";
                string operatorName = request?.operatorName ?? "系统管理员";
                string officeId = request?.officeId ?? "32760";
                string officeName = request?.officeName ?? "医保科";

                return JiangSuEcDecoder.DecodeElectronicCertificate(
                    businessType, operatorId, operatorName, officeId, officeName);
            }
            catch (Exception ex)
            {
                var errorResult = new JObject();
                errorResult["success"] = false;
                errorResult["code"] = 9001;
                errorResult["message"] = $"接口调用异常: {ex.Message}";
                errorResult["device"] = "江苏医保电子凭证解码器";
                errorResult["timestamp"] = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
                return errorResult;
            }
        }

        /// <summary>
        /// 初始化接口
        /// POST /api/jiangsuec/init
        /// </summary>
        /// <param name="request">配置参数</param>
        /// <returns>初始化结果</returns>
        [System.Web.Http.HttpPost]
        [System.Web.Http.Route("api/jiangsuec/init")]
        public JObject Init([System.Web.Http.FromBody] dynamic request)
        {
            try
            {
                JiangSuEcDecoder.JiangSuConfig config = null;

                if (request?.config != null)
                {
                    config = new JiangSuEcDecoder.JiangSuConfig();

                    if (request.config.IP != null) config.IP = (string)request.config.IP;
                    if (request.config.PORT != null) config.PORT = (int)request.config.PORT;
                    if (request.config.ORG_ID != null) config.ORG_ID = (string)request.config.ORG_ID;
                    if (request.config.ACCESS_KEY != null) config.ACCESS_KEY = (string)request.config.ACCESS_KEY;
                    if (request.config.SECRETKEY != null) config.SECRETKEY = (string)request.config.SECRETKEY;
                    if (request.config.EC_URL != null) config.EC_URL = (string)request.config.EC_URL;
                }

                return JiangSuEcDecoder.Initialize(config);
            }
            catch (Exception ex)
            {
                var errorResult = new JObject();
                errorResult["success"] = false;
                errorResult["code"] = 9002;
                errorResult["message"] = $"初始化接口异常: {ex.Message}";
                errorResult["device"] = "江苏医保电子凭证解码器";
                errorResult["timestamp"] = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
                return errorResult;
            }
        }
    }

    #endregion
}

#region 使用示例

/*
// 使用示例1：基本调用
public void Example1()
{
    // 1. 初始化（可选，会自动初始化）
    var initResult = JiangSuEcDecoder.Initialize();
    Console.WriteLine($"初始化结果: {initResult}");

    // 2. 解码电子凭证（门诊挂号）
    var decodeResult = JiangSuEcDecoder.DecodeElectronicCertificate(
        businessType: "01101",      // 门诊挂号
        operatorId: "OP001",        // 操作员编号
        operatorName: "张医生",      // 操作员姓名
        officeId: "32760",          // 科室编号
        officeName: "内科"          // 科室名称
    );

    Console.WriteLine($"解码结果: {decodeResult}");

    if ((bool)decodeResult["success"])
    {
        var patientData = decodeResult["data"];
        Console.WriteLine($"患者姓名: {patientData["userName"]}");
        Console.WriteLine($"身份证号: {patientData["idNo"]}");
        Console.WriteLine($"电子凭证令牌: {patientData["ecToken"]}");
    }
}

// 使用示例2：自定义配置
public void Example2()
{
    // 创建自定义配置
    var config = new JiangSuEcDecoder.JiangSuConfig
    {
        IP = "192.168.1.100",                           // 医院内网IP
        PORT = 8086,                                    // 端口
        ORG_ID = "H32132200561",                       // 医保定点编号
        ACCESS_KEY = "your_access_key_here",            // 申请的访问密钥
        SECRETKEY = "your_secret_key_here",             // 申请的秘钥
        EC_URL = "http://your.hospital.com:10086/localcfc/api/hsecfc/localQrCodeQuery"
    };

    // 使用自定义配置初始化
    var initResult = JiangSuEcDecoder.Initialize(config);

    // 解码电子凭证
    var decodeResult = JiangSuEcDecoder.DecodeElectronicCertificate("01301"); // 门诊结算
}

// 使用示例3：Web API集成
public class YourController : ApiController
{
    [HttpPost]
    public JObject DecodeQRCode([FromBody] dynamic request)
    {
        string businessType = request?.type ?? "01101";
        return JiangSuEcDecoder.DecodeElectronicCertificate(businessType);
    }
}

// 使用示例4：JavaScript前端调用
/*
// 前端JavaScript调用示例
$.ajax({
    url: "http://localhost:8321/api/jiangsuec/decode",
    type: "POST",
    contentType: "application/json",
    data: JSON.stringify({
        businessType: "01101",          // 门诊挂号
        operatorId: "OP001",           // 操作员编号
        operatorName: "张医生",         // 操作员姓名
        officeId: "32760",             // 科室编号
        officeName: "内科"             // 科室名称
    }),
    success: function(result) {
        if (result.success) {
            console.log("解码成功:", result.data);
            alert("患者: " + result.data.userName + ", 身份证: " + result.data.idNo);
        } else {
            console.log("解码失败:", result.message);
            alert("解码失败: " + result.message);
        }
    },
    error: function(xhr, status, error) {
        console.log("请求失败:", error);
        alert("网络请求失败");
    }
});
*/
/*
*/

#endregion
</rewritten_file>