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

namespace ThCardReader
{
    class SsCardBusiness
    {
        private static SiBusinessAddress address;

#if !DISABLE_SSCARD
        [DllImport("SSCard.dll", EntryPoint = "Init", CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
        private extern static Int32 Init(string pUrl, string pUser);

        [DllImport("SSCard.dll", EntryPoint = "ReadCardBas", CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
        private extern static Int32 ReadCardBas(StringBuilder pOutBuff, int nOutBuffLen, StringBuilder pSignBuff, int nSignBuffLen);

        [DllImport("SSCard.dll", EntryPoint = "ReadSFZ", CharSet = CharSet.Ansi, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
        private extern static Int32 ReadSFZ(StringBuilder pOutBuff, int nOutBuffLen, StringBuilder pSignBuff, int nSignBuffLen);
#endif

        private static Boolean initialized = false;
        
        public static string Initialize()
        {
#if DISABLE_SSCARD
            return "SSCard.dll已屏蔽，请使用华视读卡器";
#else
            address = MainForm.address;
            Int32 initResultCode = Init(address.readSiCardUrl, address.readSiCardUser);         
            if (initResultCode == 0)
            {
                initialized = true;
                return "初始化成功";
            }
            return "初始化失败。";
#endif
        }

        [System.Runtime.ExceptionServices.HandleProcessCorruptedStateExceptions]
        public static JObject ReadSiCard()
        {
#if DISABLE_SSCARD
            JObject result = new JObject();
            result.Add("code", 1001);
            result.Add("message", "SSCard.dll已屏蔽，请使用华视读卡器：http://localhost:8321/readcard/entry?param=huashi_readcard");
            result.Add("device", "SSCard.dll（已屏蔽）");
            result.Add("suggestion", "请使用华视读卡器测试功能");
            return result;
#else
            if (!initialized)
            {
                Initialize();
            }
            StringBuilder outptr = new StringBuilder(address.readSiCardBuffSize);
            StringBuilder signptr = new StringBuilder(address.readSiCardBuffSize);
            string outstr, signstr;            
            JObject result = new JObject();
            try
            {               
                Int32 businessResultCode = ReadCardBas(outptr, address.readSiCardBuffSize, signptr, address.readSiCardBuffSize);
                outstr = outptr.ToString();
                signstr = signptr.ToString();
                if (businessResultCode == 0)
                {
                    result.Add("code", 200);
                    result.Add("type", "sicard");
                    result.Add("data", outstr);
                    result.Add("sign", signstr);
                    result.Add("message", "读取社保卡成功。");
                }
                else
                {
                    result.Add("code", 1001);
                    result.Add("message", outstr);
                }                
            }
            catch (Exception e)
            {
                initialized = false;
                result.Add("code", 1001);
                result.Add("message", "系统出错，请重试（如此错误频繁出现，可尝试重启读卡服务）。" + e.ToString());
            }
            finally
            {
                outptr = null;
                signptr = null;
                outstr = null;
                signstr = null;
                GC.Collect();
            }
            return result;
#endif
        }

        [System.Runtime.ExceptionServices.HandleProcessCorruptedStateExceptions]
        public static JObject ReadIdCard()
        {
#if DISABLE_SSCARD
            JObject result = new JObject();
            result.Add("code", 1001);
            result.Add("message", "SSCard.dll已屏蔽，请使用华视读卡器：http://localhost:8321/readcard/entry?param=huashi_readcard");
            result.Add("device", "SSCard.dll（已屏蔽）");
            result.Add("suggestion", "请使用华视读卡器测试功能");
            return result;
#else
            if (!initialized)
            {
                Initialize();
            }
            StringBuilder outptr = new StringBuilder(address.readIdCardBuffSize);
            StringBuilder signptr = new StringBuilder(address.readIdCardBuffSize);
            string outstr, signstr;            
            JObject result = new JObject();
            try
            {
                Int32 businessResultCode = ReadSFZ(outptr, address.readIdCardBuffSize, signptr, address.readIdCardBuffSize);
                outstr = outptr.ToString();
                signstr = signptr.ToString();
                if (businessResultCode == 0)
                {
                    result.Add("code", 200);
                    result.Add("type", "idcard");
                    result.Add("data", outstr);
                    result.Add("sign", signstr);
                    result.Add("message", "读取身份证成功。");
                }
                else
                {
                    result.Add("code", 1001);
                    result.Add("message", outstr);
                }
            }
            catch (Exception e)
            {             
                initialized = false;
                result.Add("code", 1001);
                result.Add("message", "系统出错，请重试（如此错误频繁出现，可尝试重启读卡服务）。" + e.ToString());
            }
            finally
            {
                outptr = null;
                signptr = null;
                outstr = null;
                signstr = null;
                GC.Collect();
            }
            return result;
#endif
        }
    }
}