package agent

import (
	"context"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"strings"
	"ycc-server/app/main/model"
	"ycc-server/common/ctxdata"
	"ycc-server/common/xerr"
	"ycc-server/pkg/lzkit/crypto"

	"github.com/pkg/errors"

	"ycc-server/app/main/api/internal/svc"
	"ycc-server/app/main/api/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
	"github.com/zeromicro/go-zero/core/stores/sqlx"
)

type OfflineFeatureLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewOfflineFeatureLogic(ctx context.Context, svcCtx *svc.ServiceContext) *OfflineFeatureLogic {
	return &OfflineFeatureLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *OfflineFeatureLogic) OfflineFeature(req *types.OfflineFeatureReq) (resp *types.OfflineFeatureResp, err error) {
	if err := l.validateRequest(req); err != nil {
		return nil, err
	}

	userID, err := l.verifyAgent()
	if err != nil {
		return nil, err
	}

	queryModel, idCard, name, err := l.getQueryInfo(req.QueryId)
	if err != nil {
		return nil, err
	}

	mainApiId := extractMainApiId(req.FeatureApiId)
	feature, err := l.svcCtx.FeatureModel.FindOneByApiId(l.ctx, mainApiId)
	if err != nil {
		if errors.Is(err, model.ErrNotFound) {
			return nil, errors.Wrapf(xerr.NewErrMsg("模块不存在"), "")
		}
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DB_ERROR), "查询模块信息失败, %v", err)
	}

	needPay, amount, whitelistCreated, err := l.svcCtx.WhitelistService.ProcessOfflineFeature(
		l.ctx,
		nil,
		idCard,
		req.FeatureApiId,
		userID,
		req.QueryId,
	)
	if err != nil {
		return nil, err
	}

	if needPay {
		return &types.OfflineFeatureResp{
			Success: false,
			NeedPay: true,
			Amount:  amount,
		}, nil
	}

	if whitelistCreated {
		remark := fmt.Sprintf("代理下架自动同步 query_id=%s feature=%s", req.QueryId, feature.ApiId)
		l.svcCtx.QueryWhitelistSyncService.TrySync(
			l.ctx,
			name,
			idCard,
			[]string{feature.ApiId},
			remark,
		)

		if err := l.deleteQueryData(req.QueryId, req.FeatureApiId); err != nil {
			logx.Errorf("下架模块后删除报告数据失败：查询记录 %s，模块 %s，错误：%v", req.QueryId, req.FeatureApiId, err)
		}
	}

	_ = queryModel

	return &types.OfflineFeatureResp{
		Success: whitelistCreated,
		NeedPay: needPay,
		Amount:  amount,
	}, nil
}

func (l *OfflineFeatureLogic) validateRequest(req *types.OfflineFeatureReq) error {
	if req.QueryId == "" {
		return errors.Wrapf(xerr.NewErrMsg("查询记录ID不能为空"), "")
	}
	if req.FeatureApiId == "" {
		return errors.Wrapf(xerr.NewErrMsg("模块API标识不能为空"), "")
	}
	return nil
}

func (l *OfflineFeatureLogic) verifyAgent() (string, error) {
	userID, err := ctxdata.GetUidFromCtx(l.ctx)
	if err != nil {
		return "", errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "获取用户信息失败, %v", err)
	}

	_, err = l.svcCtx.AgentModel.FindOneByUserId(l.ctx, userID)
	if err != nil {
		if errors.Is(err, model.ErrNotFound) {
			return "", errors.Wrapf(xerr.NewErrMsg("您不是代理"), "")
		}
		return "", errors.Wrapf(xerr.NewErrCode(xerr.DB_ERROR), "查询代理信息失败, %v", err)
	}

	return userID, nil
}

func (l *OfflineFeatureLogic) getQueryInfo(queryId string) (*model.Query, string, string, error) {
	queryModel, err := l.svcCtx.QueryModel.FindOne(l.ctx, queryId)
	if err != nil {
		if errors.Is(err, model.ErrNotFound) {
			return nil, "", "", errors.Wrapf(xerr.NewErrMsg("查询记录不存在"), "")
		}
		return nil, "", "", errors.Wrapf(xerr.NewErrCode(xerr.DB_ERROR), "查询报告记录失败, %v", err)
	}

	idCard, name, err := extractPersonInfoFromQueryParams(l.svcCtx, queryModel)
	if err != nil {
		return nil, "", "", errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "获取查询参数失败, %v", err)
	}
	if idCard == "" {
		return nil, "", "", errors.Wrapf(xerr.NewErrMsg("查询参数中缺少身份证号"), "")
	}

	return queryModel, idCard, name, nil
}

func extractMainApiId(featureApiId string) string {
	if idx := strings.Index(featureApiId, "_"); idx > 0 {
		return featureApiId[:idx]
	}
	return featureApiId
}

func extractPersonInfoFromQueryParams(svcCtx *svc.ServiceContext, queryModel *model.Query) (idCard, name string, err error) {
	if queryModel.QueryParams == "" {
		return "", "", errors.New("查询参数为空")
	}

	secretKey := svcCtx.Config.Encrypt.SecretKey
	key, decodeErr := hex.DecodeString(secretKey)
	if decodeErr != nil {
		return "", "", errors.Wrap(decodeErr, "获取AES密钥失败")
	}

	decryptedParams, decryptErr := crypto.AesDecrypt(queryModel.QueryParams, key)
	if decryptErr != nil {
		return "", "", errors.Wrap(decryptErr, "解密查询参数失败")
	}

	var params map[string]interface{}
	if unmarshalErr := json.Unmarshal(decryptedParams, &params); unmarshalErr != nil {
		return "", "", errors.Wrap(unmarshalErr, "解析查询参数失败")
	}

	idCardValue, ok := params["id_card"].(string)
	if !ok || idCardValue == "" {
		return "", "", errors.New("查询参数中缺少 id_card 或 id_card 为空")
	}

	nameValue, _ := params["name"].(string)
	if strings.TrimSpace(nameValue) == "" {
		nameValue = "*"
	}

	return idCardValue, nameValue, nil
}

func (l *OfflineFeatureLogic) deleteQueryData(queryId, featureApiId string) error {
	return l.svcCtx.QueryModel.Trans(l.ctx, func(ctx context.Context, session sqlx.Session) error {
		return l.svcCtx.WhitelistService.DeleteFeatureFromQueryData(ctx, session, queryId, featureApiId)
	})
}