package postgres

import (
	"context"
	"fmt"

	"github.com/jackc/pgx/v5/pgxpool"

	"github.com/example/remote-access-platform/backend/internal/platform/config"
)

func Open(ctx context.Context, cfg config.PostgresConfig) (*pgxpool.Pool, error) {
	poolConfig, err := pgxpool.ParseConfig(cfg.DSN)
	if err != nil {
		return nil, fmt.Errorf("parse postgres dsn: %w", err)
	}

	poolConfig.MaxConns = cfg.MaxConns
	poolConfig.MinConns = cfg.MinConns
	poolConfig.ConnConfig.ConnectTimeout = cfg.ConnectTimeout

	pool, err := pgxpool.NewWithConfig(ctx, poolConfig)
	if err != nil {
		return nil, fmt.Errorf("create postgres pool: %w", err)
	}

	if err := pool.Ping(ctx); err != nil {
		pool.Close()
		return nil, fmt.Errorf("ping postgres: %w", err)
	}

	return pool, nil
}