package database

import (
	"context"
	"fmt"
	zapLogger "fwh-toolbox-server/logger"
	"time"

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

var MongoClient *mongo.Client
var MongoDb *mongo.Database

func InitMongo(uri string) (*mongo.Client, error) {
	databaseName, err := parseMongoDatabaseName(uri)
	if err != nil {
		return nil, err
	}

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	client, err := mongo.Connect(ctx, options.Client().ApplyURI(uri))
	if err != nil {
		zapLogger.Sugar.Errorln("Mongo connect error: ", err)
		return nil, err
	}

	if err := client.Ping(ctx, nil); err != nil {
		zapLogger.Sugar.Errorln("Mongo ping error: ", err)
		return nil, err
	}

	MongoClient = client
	MongoDb = client.Database(databaseName)
	zapLogger.Sugar.Infoln("MongoDB connected, database: ", databaseName)

	return client, nil
}

func parseMongoDatabaseName(uri string) (string, error) {
	cs, err := connstring.ParseAndValidate(uri)
	if err != nil {
		return "", fmt.Errorf("parse MongoDB URI: %w", err)
	}
	if cs.Database == "" {
		return "", fmt.Errorf("MongoDB URI must contain a database name")
	}
	return cs.Database, nil
}

func GetCollection(collName string) *mongo.Collection {
	return MongoDb.Collection(collName)
}