package inspurlegacy

import (
	"sort"
	"strings"
	"time"

	"git.mchus.pro/mchus/logpile/internal/models"
)

// bogusYear reports whether a timestamp comes from an AMI BMC clock that had
// not yet been set: the 1970/1971 epoch, or the ~2005 firmware-default RTC seen
// in alert.log. This hardware shipped no earlier than 2018, so any event before
// 2010 has no trustworthy wall-clock time.
func bogusYear(t time.Time) bool { return t.Year() < 2010 }

// severityFromWord maps a free-text severity/class word to models.Severity.
func severityFromWord(s string) models.Severity {
	switch strings.ToLower(strings.TrimSpace(s)) {
	case "critical", "error", "fatal", "serious", "nonrecoverable", "non-recoverable":
		return models.SeverityCritical
	case "warning", "warn", "predictive":
		return models.SeverityWarning
	default:
		return models.SeverityInfo
	}
}

// dedupeEvents removes exact duplicates (same timestamp, source, description)
// in place, preserving order. The same fault is often reported by both the IDL
// log and sel.log.
func dedupeEvents(events []models.Event) []models.Event {
	seen := make(map[string]struct{}, len(events))
	out := events[:0]
	for _, e := range events {
		key := e.Timestamp.Format(time.RFC3339) + "|" + e.Source + "|" + e.SensorName + "|" + e.Description
		if _, ok := seen[key]; ok {
			continue
		}
		seen[key] = struct{}{}
		out = append(out, e)
	}
	return out
}

// sortEvents orders events chronologically, then by source for stability.
func sortEvents(events []models.Event) {
	sort.SliceStable(events, func(i, j int) bool {
		if !events[i].Timestamp.Equal(events[j].Timestamp) {
			return events[i].Timestamp.Before(events[j].Timestamp)
		}
		return events[i].Source < events[j].Source
	})
}