using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using WebService.SDK.PayCommon;

namespace WebService.SDK.ALLinPay
{
    /// <summary>
    /// 通联支付API
    /// </summary>
    public class ALLinPayAPI
    {
        #region 扫码支付接口
        /// <summary>
        /// 扫码支付接口
        /// </summary>
        /// <param name="payConfig">接口配置</param>
        /// <param name="merchantInfo">平台商户信息</param>
        /// <param name="authCode">用户付款授权码</param>
        /// <param name="merchantOrderCode">商户交易订单号</param>
        /// <param name="payAmount">交易金额（元）</param>
        /// <returns></returns>
        public static Model.ScanResultModel ScanPay(ALLinPayConfig payConfig,
            MobilePayConfig.PayMerchant merchantInfo, string authCode,
            string merchantOrderCode, string payAmount)
        {
            if (payConfig == null)
            {
                return default(Model.ScanResultModel);
            }
            if (merchantInfo == null || string.IsNullOrWhiteSpace(merchantInfo.MerchantCode))
            {
                return default(Model.ScanResultModel);
            }
            if (!decimal.TryParse(payAmount, out decimal _PayAmount) || _PayAmount <= 0)
            {
                return default(Model.ScanResultModel);
            }
            Dictionary<string, string> _ApiDictionary = new Dictionary<string, string>
            {
                { "orgid", payConfig.Organization },//通联平台机构号
                { "cusid", merchantInfo.MerchantCode },//通联平台商户号
                { "appid", payConfig.PlatformAPPID },//通联平台APPID
                { "randomstr", Convert.ToInt32((DateTime.Now - new DateTime(1970, 1, 1, 0, 0, 0)).TotalSeconds).ToString() },//随机字符串
                { "trxamt", (_PayAmount*100).ToString("F0") }, //交易金额
                { "reqsn", merchantOrderCode },//商户订单号
                { "authcode", authCode }//用户付款授权码
            };
            _ApiDictionary.Add("sign", ApiParamSign(_ApiDictionary, payConfig.PlatformKey));
            LogHelper.WriteReceiveLog("支付反扫-传第三方参数：" +
                _ApiDictionary.Select(pair => pair.Key + "=" + pair.Value.ToString()).
                DefaultIfEmpty("").Aggregate((a, b) => a + "&" + b));
            return JsonConvert.DeserializeObject<Model.ScanResultModel>(CommonHelper.HttpUrlPost(
                _ApiDictionary.Select(pair => pair.Key + "=" + pair.Value.ToString()).
                DefaultIfEmpty("").Aggregate((a, b) => a + "&" + b), payConfig.ScanPayURL,
                "application/x-www-form-urlencoded", payConfig.PlatformTimeout));
        }
        #endregion

        #region 支付查询接口
        /// <summary>
        /// 支付查询接口
        /// </summary>
        /// <param name="payConfig">接口配置</param>
        /// <param name="merchantInfo">平台商户信息</param>
        /// <param name="merchantOrderCode">商户订单号
        /// 注：与平台订单号必填一项</param>
        /// <param name="platformOrderCode">平台订单号
        /// 注：与商户订单号必填一项</param>
        /// <param name="payAmount">交易金额（元）</param>
        /// <returns></returns>
        public static Model.QueryResultModel QueryPay(ALLinPayConfig payConfig,
            MobilePayConfig.PayMerchant merchantInfo, string merchantOrderCode, 
            string platformOrderCode, string payAmount)
        {
            if (payConfig == null)
            {
                return default(Model.QueryResultModel);
            }
            if (merchantInfo == null || string.IsNullOrWhiteSpace(merchantInfo.MerchantCode))
            {
                return default(Model.QueryResultModel);
            }
            Dictionary<string, string> _ApiDictionary = new Dictionary<string, string>
            {
                { "orgid", payConfig.Organization },//通联平台机构号
                { "cusid", merchantInfo.MerchantCode },//通联平台商户号
                { "appid", payConfig.PlatformAPPID },//通联平台APPID
                { "randomstr", Convert.ToInt32((DateTime.Now - new DateTime(1970, 1, 1, 0, 0, 0)).TotalSeconds).ToString() },//随机字符串
                { "reqsn", merchantOrderCode }//商户订单号
            };
            if (!string.IsNullOrWhiteSpace(platformOrderCode) && platformOrderCode != merchantOrderCode)
            {
                _ApiDictionary.Add("trxid", platformOrderCode); //平台交易流水
            }
            _ApiDictionary.Add("sign", ApiParamSign(_ApiDictionary, payConfig.PlatformKey));
            LogHelper.WriteReceiveLog("支付查询-传第三方参数：" +
                _ApiDictionary.Select(pair => pair.Key + "=" + pair.Value.ToString()).
                DefaultIfEmpty("").Aggregate((a, b) => a + "&" + b));
            return JsonConvert.DeserializeObject<Model.QueryResultModel>(CommonHelper.HttpUrlPost(
                _ApiDictionary.Select(pair => pair.Key + "=" + pair.Value.ToString()).
                DefaultIfEmpty("").Aggregate((a, b) => a + "&" + b), payConfig.QueryURL,
                "application/x-www-form-urlencoded", payConfig.PlatformTimeout));
        }
        #endregion

        #region 退款接口
        /// <summary>
        /// 退款接口
        /// </summary>
        /// <param name="payConfig">接口配置</param>
        /// <param name="merchantInfo">平台商户信息</param>
        /// <param name="platformOrderCode">平台订单号(原流水号)
        /// 注：与商户订单号必填一项</param>
        /// <param name="merchantOrderCode">商户订单号(原流水号)
        /// 注：与平台订单号必填一项</param>
        /// <param name="refundOrderCode">退款订单号</param>
        /// <param name="payAmount">退款金额（元）</param>
        /// <returns></returns>
        public static Model.RefundResultModel RefundPay(ALLinPayConfig payConfig,
            MobilePayConfig.PayMerchant merchantInfo, string platformOrderCode,
            string merchantOrderCode, string refundOrderCode, string payAmount)
        {
            if (payConfig == null)
            {
                return default(Model.RefundResultModel);
            }
            if (merchantInfo == null || string.IsNullOrWhiteSpace(merchantInfo.MerchantCode))
            {
                return default(Model.RefundResultModel);
            }
            if (!decimal.TryParse(payAmount, out decimal _PayAmount) || _PayAmount <= 0)
            {
                return default(Model.RefundResultModel);
            }
            Dictionary<string, string> _ApiDictionary = new Dictionary<string, string>
            {
                { "orgid", payConfig.Organization },//通联平台机构号
                { "cusid", merchantInfo.MerchantCode },//通联平台商户号
                { "appid", payConfig.PlatformAPPID },//通联平台APPID
                { "randomstr", Convert.ToInt32((DateTime.Now - new DateTime(1970, 1, 1, 0, 0, 0)).TotalSeconds).ToString() },//随机字符串
                { "trxamt", (_PayAmount*100).ToString("F0") }, //退款金额
                { "reqsn", refundOrderCode },//退款订单号
                { "oldtrxid", platformOrderCode } //商户退款码
            };
            if (!string.IsNullOrWhiteSpace(merchantOrderCode))
            {
                _ApiDictionary.Add("oldreqsn", merchantOrderCode);//原交易订单号
            }
            _ApiDictionary.Add("sign", ApiParamSign(_ApiDictionary, payConfig.PlatformKey));
            LogHelper.WriteReceiveLog("支付退款-传第三方参数：" +
                _ApiDictionary.Select(pair => pair.Key + "=" + pair.Value).
                DefaultIfEmpty("").Aggregate((a, b) => a + "&" + b));
            return JsonConvert.DeserializeObject<Model.RefundResultModel>(CommonHelper.HttpUrlPost(
                _ApiDictionary.Select(pair => pair.Key + "=" + pair.Value).
                DefaultIfEmpty("").Aggregate((a, b) => a + "&" + b), payConfig.RefundURL,
                "application/x-www-form-urlencoded", payConfig.PlatformTimeout));
        }
        #endregion

        /// <summary>
        /// 通联支付平台参数签名
        /// </summary>
        /// <param name="signParm">待签名参数集</param>
        /// <param name="MD5Key">签名密钥</param>
        /// <returns></returns>
        public static string ApiParamSign(Dictionary<string, string> signParm, string MD5Key)
        {
            return BitConverter.ToString(MD5.Create().ComputeHash(Encoding.UTF8.GetBytes(
                new Dictionary<string, string>(signParm) { { "key", MD5Key } }.OrderBy(p => p.Key)
                .Select(pair => pair.Key + "=" + pair.Value.ToString()).DefaultIfEmpty("")
                .Aggregate((a, b) => a + "&" + b)))).Replace("-", "").ToUpper();
        }
    }
}