// Package database define database operation functions
package database

import (
	"context"
	"sync"
	"time"

	"eventRT/config"

	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
)

var (
	_globalMongoClient *mongo.Client
	mongoOnce          sync.Once
)

// InitMongoInstance return instance of MongoDB client
func InitMongoInstance(ctx context.Context, mCfg config.MongoDBConfig) *mongo.Client {
	mongoOnce.Do(func() {
		cancelCtx, cancel := context.WithTimeout(ctx, time.Duration(mCfg.Timeout)*time.Second)
		defer cancel()

		client, err := mongo.Connect(cancelCtx, options.Client().ApplyURI(mCfg.URI))
		if err != nil {
			panic(err)
		}
		_globalMongoClient = client
	})
	return _globalMongoClient
}