gomcp/internal/application/soc/threat_intel_test.go

// Copyright 2026 Syntrex Lab. All rights reserved.
// Use of this source code is governed by an Apache-2.0 license
// that can be found in the LICENSE file.

package soc

import (
	"testing"
	"time"
)

func TestThreatIntelStore_AddAndLookup(t *testing.T) {
	store := NewThreatIntelStore()

	ioc := IOC{
		Type:       IOCTypeIP,
		Value:      "192.168.1.100",
		Source:     "test-feed",
		Severity:   "high",
		FirstSeen:  time.Now(),
		LastSeen:   time.Now(),
		Confidence: 0.9,
	}

	store.AddIOC(ioc)

	if store.TotalIOCs != 1 {
		t.Errorf("expected 1 IOC, got %d", store.TotalIOCs)
	}

	found := store.Lookup(IOCTypeIP, "192.168.1.100")
	if found == nil {
		t.Fatal("expected to find IOC")
	}
	if found.Source != "test-feed" {
		t.Errorf("expected source test-feed, got %s", found.Source)
	}
}

func TestThreatIntelStore_LookupNotFound(t *testing.T) {
	store := NewThreatIntelStore()
	found := store.Lookup(IOCTypeIP, "10.0.0.1")
	if found != nil {
		t.Error("expected nil for unknown IOC")
	}
}

func TestThreatIntelStore_CaseInsensitiveLookup(t *testing.T) {
	store := NewThreatIntelStore()

	store.AddIOC(IOC{
		Type:       IOCTypeDomain,
		Value:      "evil.example.COM",
		Source:     "test",
		FirstSeen:  time.Now(),
		LastSeen:   time.Now(),
		Confidence: 0.8,
	})

	// Lookup with different case
	found := store.Lookup(IOCTypeDomain, "evil.example.com")
	if found == nil {
		t.Fatal("expected case-insensitive match")
	}
}

func TestThreatIntelStore_UpdateExisting(t *testing.T) {
	store := NewThreatIntelStore()
	now := time.Now()
	earlier := now.Add(-24 * time.Hour)

	store.AddIOC(IOC{
		Type:       IOCTypeIP,
		Value:      "10.0.0.1",
		Source:     "feed1",
		FirstSeen:  now,
		LastSeen:   now,
		Confidence: 0.5,
	})

	// Second add with earlier FirstSeen and higher confidence
	store.AddIOC(IOC{
		Type:       IOCTypeIP,
		Value:      "10.0.0.1",
		Source:     "feed2",
		FirstSeen:  earlier,
		LastSeen:   now,
		Confidence: 0.95,
	})

	// Should still be 1 IOC (merged)
	if store.TotalIOCs != 1 {
		t.Errorf("expected 1 IOC after merge, got %d", store.TotalIOCs)
	}

	found := store.Lookup(IOCTypeIP, "10.0.0.1")
	if found == nil {
		t.Fatal("expected to find merged IOC")
	}
	if found.Confidence != 0.95 {
		t.Errorf("expected confidence 0.95 after merge, got %.2f", found.Confidence)
	}
	if !found.FirstSeen.Equal(earlier) {
		t.Error("expected FirstSeen to be earlier timestamp after merge")
	}
}

func TestThreatIntelStore_LookupAny(t *testing.T) {
	store := NewThreatIntelStore()

	store.AddIOC(IOC{Type: IOCTypeIP, Value: "10.0.0.1", FirstSeen: time.Now(), LastSeen: time.Now()})
	store.AddIOC(IOC{Type: IOCTypeDomain, Value: "10.0.0.1", FirstSeen: time.Now(), LastSeen: time.Now()})

	matches := store.LookupAny("10.0.0.1")
	if len(matches) != 2 {
		t.Errorf("expected 2 matches (IP + domain), got %d", len(matches))
	}
}

func TestThreatIntelStore_EnrichEvent(t *testing.T) {
	store := NewThreatIntelStore()

	store.AddIOC(IOC{
		Type:       IOCTypeIP,
		Value:      "malicious-sensor",
		Source:     "intel",
		Severity:   "critical",
		FirstSeen:  time.Now(),
		LastSeen:   time.Now(),
		Confidence: 0.99,
	})

	// Enrich event with matching sensorID as sourceIP
	matches := store.EnrichEvent("malicious-sensor", "normal traffic")
	if len(matches) != 1 {
		t.Errorf("expected 1 IOC match, got %d", len(matches))
	}
}

func TestThreatIntelStore_EnrichEvent_DomainInDescription(t *testing.T) {
	store := NewThreatIntelStore()

	store.AddIOC(IOC{
		Type:      IOCTypeDomain,
		Value:     "evil.example.com",
		Source:    "stix",
		FirstSeen: time.Now(),
		LastSeen:  time.Now(),
	})

	matches := store.EnrichEvent("", "Request to evil.example.com detected")
	if len(matches) != 1 {
		t.Errorf("expected 1 domain match in description, got %d", len(matches))
	}
}

func TestThreatIntelStore_AddDefaultFeeds(t *testing.T) {
	store := NewThreatIntelStore()
	store.AddDefaultFeeds()

	if store.TotalFeeds != 3 {
		t.Errorf("expected 3 default feeds, got %d", store.TotalFeeds)
	}

	feeds := store.GetFeeds()
	for _, f := range feeds {
		if f.Enabled {
			t.Errorf("default feed %s should be disabled", f.Name)
		}
	}
}

func TestThreatIntelStore_Stats(t *testing.T) {
	store := NewThreatIntelStore()
	store.AddIOC(IOC{Type: IOCTypeIP, Value: "1.2.3.4", FirstSeen: time.Now(), LastSeen: time.Now()})
	store.AddDefaultFeeds()

	stats := store.Stats()
	if stats["total_iocs"] != 1 {
		t.Errorf("expected total_iocs=1, got %v", stats["total_iocs"])
	}
	if stats["total_feeds"] != 3 {
		t.Errorf("expected total_feeds=3, got %v", stats["total_feeds"])
	}
}