package app

import (
	"strings"
	"time"
)

func transportRuntimeSnapshot(it TransportClient, now time.Time) TransportClientRuntime {
	rt := it.Runtime
	if strings.TrimSpace(rt.Backend) == "" {
		rt.Backend = selectTransportBackend(it).ID()
	}
	if len(rt.AllowedActions) == 0 {
		rt.AllowedActions = []string{"provision", "start", "stop", "restart"}
	}
	if rt.Metrics.Restarts < 0 {
		rt.Metrics.Restarts = 0
	}
	if rt.Metrics.StateChanges < 0 {
		rt.Metrics.StateChanges = 0
	}
	if strings.TrimSpace(rt.LastError.Message) == "" && strings.TrimSpace(it.Health.LastError) != "" {
		rt.LastError = TransportClientError{
			Code:      "BACKEND_RUNTIME_ERROR",
			Message:   strings.TrimSpace(it.Health.LastError),
			Retryable: true,
			At:        strings.TrimSpace(it.Health.LastCheck),
		}
	}
	rt.Metrics.UptimeSec = transportUptimeSec(it.Status, rt.StartedAt, now)
	return rt
}

func normalizeTransportRuntimeStored(rt TransportClientRuntime, kind TransportClientKind, cfg map[string]any) (TransportClientRuntime, bool) {
	changed := false
	if strings.TrimSpace(rt.Backend) == "" {
		rt.Backend = selectTransportBackend(TransportClient{Kind: kind, Config: cfg}).ID()
		changed = true
	}
	wantActions := []string{"provision", "start", "stop", "restart"}
	if !equalStringSlices(rt.AllowedActions, wantActions) {
		rt.AllowedActions = append([]string(nil), wantActions...)
		changed = true
	}
	if rt.Metrics.Restarts < 0 {
		rt.Metrics.Restarts = 0
		changed = true
	}
	if rt.Metrics.StateChanges < 0 {
		rt.Metrics.StateChanges = 0
		changed = true
	}
	if rt.Metrics.UptimeSec < 0 {
		rt.Metrics.UptimeSec = 0
		changed = true
	}
	if rt.LastExitCode < 0 {
		rt.LastExitCode = 0
		changed = true
	}
	if strings.TrimSpace(rt.LastError.Message) == "" && strings.TrimSpace(rt.LastError.Code) != "" {
		rt.LastError.Code = ""
		changed = true
	}
	return rt, changed
}

func transportUptimeSec(status TransportClientStatus, startedAt string, now time.Time) int64 {
	if status != TransportClientUp {
		return 0
	}
	ts := strings.TrimSpace(startedAt)
	if ts == "" {
		return 0
	}
	started, err := time.Parse(time.RFC3339, ts)
	if err != nil {
		return 0
	}
	if started.After(now) {
		return 0
	}
	return int64(now.Sub(started).Seconds())
}