package logic

import (
	"context"
	"errors"

	"juwan-backend/app/chat/rpc/internal/svc"
	"juwan-backend/app/chat/rpc/pb"

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

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

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

func (l *UpdateChatSessionsLogic) UpdateChatSessions(in *pb.UpdateChatSessionsReq) (*pb.UpdateChatSessionsResp, error) {
	store := l.svcCtx.Store
	store.Mu.Lock()
	defer store.Mu.Unlock()

	session, ok := store.Sessions[in.GetId()]
	if !ok {
		return nil, errors.New("session not found")
	}

	if in.Name != nil {
		session.Name = *in.Name
	}
	if in.LastMessage != nil {
		session.LastMessage = *in.LastMessage
	}
	if in.LastMessageAt != nil {
		session.LastMessageAt = *in.LastMessageAt
	}
	session.UpdatedAt = nowUnix(0)

	return &pb.UpdateChatSessionsResp{}, nil
}