// Copyright (c) 2012-2016 Eli Janssen
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.

package statsd

import "time"

// NewBufferedClient seturns a new BufferedClient
//
// addr is a string of the format "hostname:port", and must be parsable by
// net.ResolveUDPAddr.
//
// prefix is the statsd client prefix. Can be "" if no prefix is desired.
//
// flushInterval is a time.Duration, and specifies the maximum interval for
// packet sending. Note that if you send lots of metrics, you will send more
// often. This is just a maximal threshold.
//
// If flushInterval is 0ms, defaults to 300ms.
//
// flushBytes specifies the maximum udp packet size you wish to send. If adding
// a metric would result in a larger packet than flushBytes, the packet will
// first be send, then the new data will be added to the next packet.
//
// If flushBytes is 0, defaults to 1432 bytes, which is considered safe
// for local traffic. If sending over the public internet, 512 bytes is
// the recommended value.
func NewBufferedClient(addr, prefix string, flushInterval time.Duration, flushBytes int) (Statter, error) {
	if flushBytes <= 0 {
		// https://github.com/etsy/statsd/blob/master/docs/metric_types.md#multi-metric-packets
		flushBytes = 1432
	}
	if flushInterval <= time.Duration(0) {
		flushInterval = 300 * time.Millisecond
	}
	sender, err := NewBufferedSender(addr, flushInterval, flushBytes)
	if err != nil {
		return nil, err
	}

	client := &Client{
		prefix: prefix,
		sender: sender,
	}

	return client, nil
}
