package cping

import (
	"strconv"
	"strings"
	"time"

	"rocketgit.ru/rsmon/worker/app/models"
	"rocketgit.ru/rsmon/worker/internal/checkresult"
)

// Result is the outcome of a single ping check. It embeds
// checkresult.CheckResult for the standard fields (State, Error,
// Duration, Warnings, Infos) and adds Ping-specific metrics consumed
// by the metrics writers when the check produces influx telemetry.
type Result struct {
	checkresult.CheckResult
	PacketsSent int
	PacketsRecv int
	AvgRttMs    float64
}

// InfluxFields reports ping metrics in the same shape as the rest of
// the check packages: "took" is elapsed ms (for graphs and alerts).
func (r *Result) InfluxFields() map[string]interface{} {
	ret := make(map[string]interface{}, 0)
	ret["took"] = int64(r.Duration / time.Millisecond)
	ret["packets_sent"] = r.PacketsSent
	ret["packets_recv"] = r.PacketsRecv
	ret["packet_loss"] = lossPercent(r.PacketsSent, r.PacketsRecv)
	if r.AvgRttMs > 0 {
		ret["rtt_ms"] = int64(r.AvgRttMs)
	}
	return ret
}

// InfluxTags returns the standard set of tags used by the chttp/cdns
// packages. The "state" tag is taken from the embedded CheckResult
// after Perform() has populated it so the writer sees the actual
// final state (OK/ERR/FAIL/WARN).
func (r *Result) InfluxTags(c models.Check) map[string]string { //nolint:gocritic // hugeParam: accepted for interface compatibility
	ret := make(map[string]string, 0)
	ret["check"] = strconv.FormatInt(c.ID, 10)
	ret["state"] = r.State
	if r.Error != nil {
		ret["error"] = r.Error.Error()
	}
	ret["warnings"] = strings.Join(r.Warnings, ",")
	return ret
}

func lossPercent(sent, recv int) int64 {
	if sent <= 0 {
		return 0
	}
	if recv >= sent {
		return 0
	}
	return int64(100 * (sent - recv) / sent)
}