package database

import (
	"database/sql"
	"fmt"
	"time"

	_ "github.com/lib/pq"
)

type Config struct {
	Host     string
	Port     int
	User     string
	Password string
	DBName   string
}

func NewConnection(cfg Config) (*sql.DB, error) {
	dsn := fmt.Sprintf(
		"host=%s port=%d user=%s password=%s dbname=%s sslmode=disable",
		cfg.Host, cfg.Port, cfg.User, cfg.Password, cfg.DBName,
	)

	db, err := sql.Open("postgres", dsn)
	if err != nil {
		return nil, err
	}

	// Connection pooling
	db.SetMaxOpenConns(25)
	db.SetMaxOpenConns(5)
	db.SetConnMaxLifetime(5 * time.Minute)
	db.SetConnMaxIdleTime(10 * time.Minute)

	if err := db.Ping(); err != nil {
		return nil, err
	}

	return db, nil
}