package tencent

import (
	"crypto/aes"
	"crypto/cipher"
	"crypto/hmac"
	"crypto/sha256"
	"encoding/base64"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"mtp2_if/config"
	"mtp2_if/db"
	"mtp2_if/logger"
	"mtp2_if/models"
	"mtp2_if/services/tencent/essapi"
	"mtp2_if/utils"

	essbasic "github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/essbasic/v20210526"
)

func CreateConsoleLoginUrl(agent *essbasic.Agent, proxyOrganizationName string) (response *essbasic.CreateConsoleLoginUrlResponse, err error) {
	response, err = essapi.CreateConsoleLoginUrl(agent, proxyOrganizationName)
	return
}

// InitTencentESS 按用户ID和机构ID创建腾讯电子签业务信息
func InitTencentESS(userId, areaUserId int) (err error) {
	esignTemplateConfigs, err := models.QueryEsignTemplateConfigs(2, 4)
	if err != nil {
		return
	}

	session := db.GetEngine().NewSession()
	defer session.Close()
	// 开启事务
	session.Begin()

	// 新增 MdUserSwapProtocol
	err = models.InsertMdUserSwapProtocol(userId, areaUserId, 1, session)
	if err != nil {
		session.Rollback()
		return
	}

	// 新增 UserEsignRecord
	for _, item := range esignTemplateConfigs {
		err = models.InsertUserEsignRecord(userId, areaUserId, item, session)
		if err != nil {
			session.Rollback()
			return
		}
	}

	return session.Commit()
}

func InitMdUserSwapProtocol(userId, areaUserId int) (err error) {
	// 新增 MdUserSwapProtocol
	err = models.InsertMdUserSwapProtocol(userId, areaUserId, 3, db.GetEngine().NewSession())
	if err != nil {
		return
	}

	return
}

// CreateFlowByTemplateDirectly 通过合同模板创建合同签署流程
func CreateFlowByTemplateDirectly(tmplateName string, userType int,
	personName, personMobile, personIdCardNumber string,
	organizationName string,
	record *models.Useresignrecord) (flowId, signUrl string, err error) {

	// 获取模板信息
	templateInfo, err := GetTemplateInfo(&tmplateName)
	if err != nil {
		return
	}
	if templateInfo == nil {
		err = fmt.Errorf("获取模板信息失败, tmplateName:%v", tmplateName)
		logger.GetLogger().Errorf("CreateFlowByTemplateDirectly, %v", err.Error())
		return
	}

	// 获取模板里面的参与方RecipientId
	recipients := templateInfo.Recipients
	if recipients == nil {
		err = fmt.Errorf("获取模板参与方信息失败, tmplateName:%v", tmplateName)
		logger.GetLogger().Errorf("CreateFlowByTemplateDirectly, %v", err.Error())
		return
	}

	// 此处为快速发起的签署方；如果是正式接入，构造签署方，请参考函数内说明，构造需要的场景参数
	var flowApproverInfos []*essbasic.FlowApproverInfo
	if userType == 1 {
		flowApproverInfos = buildPersonApprovers(personName, personMobile, personIdCardNumber, recipients)
	} else {
		flowApproverInfos = buildOrganizationApprovers(organizationName, recipients)
	}

	// 发起合同
	resp, err := essapi.CreateFlowByTemplateDirectly(*templateInfo.TemplateName, *templateInfo.TemplateId, flowApproverInfos)
	if err != nil {
		return
	}
	if resp == nil || len(resp["flowIds"]) == 0 || len(resp["urls"]) == 0 {
		err = fmt.Errorf("发起合同签署流程失败, tmplateName:%v", tmplateName)
		logger.GetLogger().Errorf("CreateFlowByTemplateDirectly, %v", err.Error())
		return
	}
	flowId = *resp["flowIds"][0]
	signUrl = *resp["urls"][0]

	// 更新电子签记录表信息状态
	record.CONTRACTNO = flowId
	record.SIGNURL = signUrl
	record.RECORDSTATUS = 2
	if err = record.Update("CONTRACTNO,SIGNURL,RECORDSTATUS"); err != nil {
		logger.GetLogger().Errorf("CreateFlowByTemplateDirectly, %v", err.Error())
	}

	return
}

// GetFlowStatus 获取合同状态
func GetFlowStatus(flowId string) (recordStatus int, err error) {
	agent := utils.SetAgent()
	response, err := essapi.DescribeFlowDetailInfo(agent, []*string{&flowId})
	if err == nil {
		if len(response.Response.FlowInfo) == 0 {
			err = fmt.Errorf("获取合同明细失败")
			return
		}
		flowDetailInfo := response.Response.FlowInfo[0]

		// 获取对应电子签信息
		var record *models.Useresignrecord
		record, err = models.GetUseresignRecordByFlowID(flowId)
		if err != nil {
			err = fmt.Errorf("获取电子签信息失败")
			return
		}

		// 更新电子签信息状态
		if *flowDetailInfo.FlowStatus == "ALL" {
			recordStatus = 3
		}
		if *flowDetailInfo.FlowStatus == "REJECT" {
			recordStatus = 4
		}
		if recordStatus == 0 {
			err = fmt.Errorf("合同状态异常")
			return
		}
		record.RECORDSTATUS = int32(recordStatus)
		if err = record.Update("RECORDSTATUS"); err != nil {
			logger.GetLogger().Errorf("GetFlowStatus, %v", err.Error())
		}

		if recordStatus == 3 {
			// 更新用户掉期协议签署表
			UpdateMdUserSwapProtocol(flowId)
		}
	}

	return
}

func UpdateMdUserSwapProtocol(flowId string) (err error) {
	// 获取对应的电子签记录
	var record *models.Useresignrecord
	record, err = models.GetUseresignRecordByFlowID(flowId)
	if err != nil {
		logger.GetLogger().Errorf("UpdateMdUserSwapProtocol, 获取对应的电子签记录失败：%v", err.Error())
		return
	}

	// 获取此用户对应机构的电子签记录列表
	records, err := models.QueryUsereSignRecords(int(record.USERID), int(record.AREAUSERID), nil, nil, nil)
	if err == nil {
		// 所有合同签署完成后，更新用户掉期协议签署表
		flag := true
		for _, item := range records {
			if item.RECORDSTATUS != 3 {
				flag = false
				break
			}
		}
		if flag {
			// 获取对应用户掉期协议签署记录
			var datas []models.Mduserswapprotocol
			datas, err = models.QueryMdUserSwapProtocol(int(record.USERID), &record.AREAUSERID)
			if err == nil {
				if len(datas) > 0 {
					data := datas[0]

					// 获取用户信息，如果是用户所属机构则改状态为 4:已审核，否则改为 3:已签署
					var userAccount *models.Useraccount
					if userAccount, err = models.GetUserAccount(int(record.USERID)); err == nil {
						status := 4
						if userAccount.Memberuserid != record.AREAUSERID {
							status = 3
						}
						data.PROTOCOLSTATUS = int32(status)
						err = data.Update("PROTOCOLSTATUS")
					}
				}
			} else {
				logger.GetLogger().Errorf("UpdateMdUserSwapProtocol, 获取对应用户掉期协议签署记录失败：%v", err.Error())
			}
		}
	} else {
		logger.GetLogger().Errorf("UpdateMdUserSwapProtocol, 获取对应的机构电子签记录失败：%v", err.Error())
	}

	return
}

// GetTemplateInfo 获取模板信息
func GetTemplateInfo(contractName *string) (templateInfo *essbasic.TemplateInfo, err error) {
	agent := utils.SetAgent()
	templatesResp, err := essapi.DescribeTemplates(agent, contractName)
	if err == nil {
		if len(templatesResp.Response.Templates) > 0 {
			templateInfo = templatesResp.Response.Templates[0]
		} else {
			err = fmt.Errorf("获取模板信息失败")
		}
	}

	return
}

// buildPersonApprovers 构造个人签署人 - 以BtoC为例, 实际请根据自己的场景构造签署方、控件
func buildPersonApprovers(personName, personMobile, personIdCardNumber string, recipients []*essbasic.Recipient) []*essbasic.FlowApproverInfo {
	var flowApproverInfos []*essbasic.FlowApproverInfo

	// 传入个人签署方
	flowApproverInfo := &essbasic.FlowApproverInfo{}
	approverType := "PERSON"
	flowApproverInfo.ApproverType = &approverType
	flowApproverInfo.Name = &personName
	flowApproverInfo.Mobile = &personMobile
	flowApproverInfo.IdCardType = utils.SetPointValue("ID_CARD")
	flowApproverInfo.IdCardNumber = &personIdCardNumber
	// 模板中对应签署方的参与方id
	flowApproverInfo.RecipientId = recipients[0].RecipientId

	flowApproverInfos = append(flowApproverInfos, flowApproverInfo)

	// 传入企业静默签署，此处需要在config.php中设置一个持有的印章值serverSignSealId
	// flowApproverInfos = append(flowApproverInfos, BuildServerSignApprover())

	// 内容控件填充结构，详细说明参考
	// https://cloud.tencent.com/document/api/1420/61525#FormField

	return flowApproverInfos
}

// buildOrganizationApprovers 构造企业签署人
func buildOrganizationApprovers(organizationName string, recipients []*essbasic.Recipient) []*essbasic.FlowApproverInfo {
	var flowApproverInfos []*essbasic.FlowApproverInfo

	// 传入企业签署方
	flowApproverInfo := &essbasic.FlowApproverInfo{}
	approverType := "ORGANIZATION"
	flowApproverInfo.ApproverType = &approverType
	flowApproverInfo.OrganizationName = &organizationName
	// 模板中对应签署方的参与方id
	flowApproverInfo.RecipientId = recipients[0].RecipientId

	flowApproverInfos = append(flowApproverInfos, flowApproverInfo)

	return flowApproverInfos
}

func ProcessNotice(content string) {
	// "{\"MsgId\":\"yDSLWUUckposmdf8UBxiJvuDbgiYRYbj\",\"MsgType\":\"FlowStatusChange\",\"MsgVersion\":\"ThirdPartyApp\",\"MsgData\":{\"ApplicationId\":\"yDwiuUUckpogfoa4UxhigrYChFMdSJQV\",\"ProxyOrganizationOpenId\":\"TJMD\",\"CustomerData\":\"\",\"FlowId\":\"yDSLWUUckposcsthUwvcaGSuV5EKZAzu\",\"FlowName\":\"1000_P_风险揭示书\",\"FlowType\":\"合同\",\"FlowStatus\":\"INIT\",\"FlowMessage\":\"\",\"CreateOn\":1699077064,\"Deadline\":1730613064,\"FlowApproverInfo\":[{\"ProxyOrganizationOpenId\":\"\",\"ProxyOperatorOpenId\":\"\",\"recipientId\":\"yDSLNUUckpos1i71UuGNih5yMGbZij46\",\"RecipientId\":\"yDSLNUUckpos1i71UuGNih5yMGbZij46\",\"PhoneNumber\":\"15914012152\",\"ProxyOrganizationName\":\"\",\"SignOrder\":0,\"ApproveName\":\"曹晓亮\",\"ApproveStatus\":\"PENDING\",\"ApproveMessage\":\"\",\"ApproveTime\":0,\"CaSign\":\"\"}],\"OccurTime\":1699077064,\"CcInfo\":[]}}"
	m := make(map[string]interface{})
	if err := json.Unmarshal([]byte(content), &m); err == nil {
		// 判断通知类型
		msgType, _ := m["MsgType"].(string)
		if msgType == "FlowStatusChange" {
			// 合同相关回调
			// https://qian.tencent.com/developers/partner/callback_types_contracts_sign
			msgData, _ := m["MsgData"].(map[string]interface{})
			flowId, _ := msgData["FlowId"].(string)
			flowStatus, _ := msgData["FlowStatus"].(string)
			if flowStatus == "ALL" || flowStatus == "REJECT" {
				// 更新电子签合同状态
				if record, err := models.GetUseresignRecordByFlowID(flowId); err == nil {
					if flowStatus == "ALL" {
						record.RECORDSTATUS = 3
					} else {
						record.RECORDSTATUS = 4
					}
					if err = record.Update("RECORDSTATUS"); err != nil {
						logger.GetLogger().Errorf("ProcessNotice, %v", err.Error())
					}

					if record.RECORDSTATUS == 3 {
						// 更新用户掉期协议签署表
						UpdateMdUserSwapProtocol(flowId)
					}
				}
			}
		}
	}
}

// VerifySign 电子签通知推送验签
func VerifySign(payload, signFromHeader string) bool {
	// 验证签名
	hash := "sha256=" + hmacsha256hex(payload, config.SerCfg.TencentCfg.SignToken)
	return hash == signFromHeader
}

// DecryptContent 电子签通知推送内容解密
func DecryptContent(payload string) (content string, err error) {
	// string -> json
	m := make(map[string]string)
	err = json.Unmarshal([]byte(payload), &m)
	if err != nil {
		return
	}
	encrypt, ok := m["encrypt"]
	if !ok {
		err = fmt.Errorf("电子签通知推送内容解密失败")
		logger.GetLogger().Errorf("DecryptContent, %v", err.Error())
		return
	}

	// base64解密
	crypted, err := base64.StdEncoding.DecodeString(encrypt)
	if err != nil {
		logger.GetLogger().Errorf("base64 DecodeString returned: %s", err)
		return
	}

	b, err := aesDecrypt(crypted, []byte(config.SerCfg.TencentCfg.SignKey))
	if err != nil {
		logger.GetLogger().Errorf("AesDecrypt returned: %s", err)
		return
	}
	content = string(b)

	return
}

// Hmacsha256hex hmac sha256
func hmacsha256hex(s, key string) string {
	hashed := hmac.New(sha256.New, []byte(key))
	hashed.Write([]byte(s))
	return hex.EncodeToString(hashed.Sum(nil))
}

// 使用callbackKey解密
func aesDecrypt(crypted, key []byte) ([]byte, error) {
	block, err := aes.NewCipher(key)
	if err != nil {
		return nil, err
	}
	blockSize := block.BlockSize()
	blockMode := cipher.NewCBCDecrypter(block, key[:blockSize])
	origData := make([]byte, len(crypted))
	blockMode.CryptBlocks(origData, crypted)
	origData = pkcs7UnPadding(origData)
	return origData, nil
}

// PKCS7UnPadding 去除填充
func pkcs7UnPadding(origData []byte) []byte {
	length := len(origData)
	unPadding := int(origData[length-1])
	return origData[:(length - unPadding)]
}