package redisconn

import (
	"context"
	"errors"
	"fmt"
	"time"

	"github.com/redis/go-redis/v9"
)

// Ping bounds client.Ping under timeout and returns a wrapped error so
// startup failures are easy to spot in service logs.
//
// timeout is typically taken from Config.OperationTimeout.
func Ping(ctx context.Context, client *redis.Client, timeout time.Duration) error {
	if client == nil {
		return errors.New("ping redis: nil client")
	}
	if timeout <= 0 {
		return errors.New("ping redis: timeout must be positive")
	}

	pingCtx, cancel := context.WithTimeout(ctx, timeout)
	defer cancel()

	if err := client.Ping(pingCtx).Err(); err != nil {
		return fmt.Errorf("ping redis: %w", err)
	}
	return nil
}