package logic

import (
	"context"
	"strconv"

	"lone-services/pkg/modelbase"
	"lone-services/pkg/utils"
	"lone-services/pkg/validate"
	user "lone-services/rpc/user/pb"
	"lone-services/services/user/internal/dao"
	"lone-services/services/user/internal/model"
	"lone-services/services/user/internal/svc"
	"lone-services/services/user/validator"

	"github.com/zeromicro/go-zero/core/logx"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
	"gorm.io/gorm"
)

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

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

func (l *InternalDeleteUserLogic) InternalDeleteUser(in *user.InternalDeleteUserReq) (*user.InternalDeleteUserData, error) {
	var req validator.InternalDeleteUserValidator
	if msg := validate.ValidateFromProto(in, &req); msg != utils.StringEmpty {
		return nil, status.Error(codes.InvalidArgument, msg)
	}

	userModel := model.UserModel{}.Init()
	var row dao.UserRow
	if err := userModel.GetOne(modelbase.Params{
		Eq: map[string]string{"id": strconv.FormatInt(req.UserId, utils.NumberTen)},
	}, &row); err != nil {
		l.Errorf("internal delete user get: %v", err)
		return nil, status.Error(codes.Internal, utils.Fail.Msg)
	}
	if row.Id < utils.NumberOne {
		return nil, status.Error(codes.NotFound, utils.ErrorNotFund.Msg)
	}

	clientModel := model.UserClientModel{}.Init()
	var clients []dao.UserClient
	if err := clientModel.Items(modelbase.Params{
		Eq: map[string]string{"user_id": strconv.FormatInt(req.UserId, utils.NumberTen)},
	}, &clients); err != nil {
		l.Errorf("internal delete user clients: %v", err)
		return nil, status.Error(codes.Internal, utils.Fail.Msg)
	}

	outClients := make([]*user.InternalDeleteUserClient, 0, len(clients))
	for _, c := range clients {
		outClients = append(outClients, &user.InternalDeleteUserClient{
			ClientCode: c.ClientCode,
			BizId:      c.BizId,
		})
	}

	txErr := l.svcCtx.DB.WithContext(l.ctx).Transaction(func(tx *gorm.DB) error {
		credModel := model.UserCredentialModel{}.Init()
		credModel.Base = credModel.Base.WithTX(tx)
		if _, err := credModel.Del(modelbase.Params{
			Eq: map[string]string{"user_id": strconv.FormatInt(req.UserId, utils.NumberTen)},
		}, &dao.UserCredential{}); err != nil {
			return err
		}

		ucModel := model.UserClientModel{}.Init()
		ucModel.Base = ucModel.Base.WithTX(tx)
		if _, err := ucModel.Del(modelbase.Params{
			Eq: map[string]string{"user_id": strconv.FormatInt(req.UserId, utils.NumberTen)},
		}, &dao.UserClient{}); err != nil {
			return err
		}

		if err := deleteUserDetail(tx, req.UserId); err != nil {
			return err
		}
		return deleteUser(tx, req.UserId)
	})
	if txErr != nil {
		l.Errorf("internal delete user tx: %v", txErr)
		return nil, status.Error(codes.Internal, utils.Fail.Msg)
	}

	return &user.InternalDeleteUserData{
		Ok:      true,
		Clients: outClients,
	}, nil
}