package ucca

import "testing"

func intentRes(reg, sourceClass string, sem float64, weight int) LegalSearchResult {
	return LegalSearchResult{
		RegulationShort: reg, SourceClass: sourceClass, Score: sem,
		AuthorityWeight: weight, Jurisdiction: "EU",
	}
}

func TestQueryWantsGuidance(t *testing.T) {
	wants := []string{
		"Was empfiehlt der EDPB zum DSB?",
		"Was sagt die ENISA zu Security Updates?",
		"laut DSK ...",
		"Orientierungshilfe zur DSFA",
		"Welche BSI-Empfehlung gilt?",
		"Auslegung der Aufsichtsbehörde",
	}
	plain := []string{
		"Ab wann braucht man einen Datenschutzbeauftragten?",
		"Welche Anforderungen bestehen an Security Updates?",
	}
	for _, q := range wants {
		if !queryWantsGuidance(q) {
			t.Errorf("should detect interpretation intent: %q", q)
		}
	}
	for _, q := range plain {
		if queryWantsGuidance(q) {
			t.Errorf("should NOT detect intent (norm question): %q", q)
		}
	}
}

func TestRerank_NormQuestion_BindingStaysTop(t *testing.T) {
	// No intent signal → binding wins even though guidance is semantically higher.
	results := []LegalSearchResult{
		intentRes("EDPB DPO", "supervisory_guidance", 0.64, 70),
		intentRes("DSGVO", "binding_law", 0.58, 100),
	}
	out := rerankByAuthority("Ab wann braucht man einen Datenschutzbeauftragten?", results)
	if out[0].SourceClass != "binding_law" {
		t.Errorf("norm question: binding must stay Top-1, got %s", out[0].SourceClass)
	}
}

func TestRerank_InterpretationQuestion_GuidanceMayWin(t *testing.T) {
	// Explicit intent + guidance semantically competitive → guidance wins.
	results := []LegalSearchResult{
		intentRes("EDPB DPO", "supervisory_guidance", 0.64, 70),
		intentRes("DSGVO", "binding_law", 0.58, 100),
	}
	out := rerankByAuthority("Was empfiehlt der EDPB zum Datenschutzbeauftragten?", results)
	if out[0].SourceClass != "supervisory_guidance" {
		t.Errorf("interpretation question: guidance should win Top-1, got %s", out[0].SourceClass)
	}
}

func TestRerank_OffTopicGuidance_BlockedByGuard(t *testing.T) {
	// Intent present, but guidance semantic is far below the best binding hit →
	// the margin guard keeps binding on top (no off-topic guideline override).
	results := []LegalSearchResult{
		intentRes("EDPB DPO", "supervisory_guidance", 0.40, 70),
		intentRes("DSGVO", "binding_law", 0.58, 100),
	}
	out := rerankByAuthority("Was empfiehlt der EDPB zum Datenschutzbeauftragten?", results)
	if out[0].SourceClass != "binding_law" {
		t.Errorf("off-topic guidance must not win even with intent, got %s", out[0].SourceClass)
	}
}

func TestQueryWantsControls(t *testing.T) {
	wants := []string{
		"Welche Controls passen zu Security Updates?",
		"Welche Maßnahmen sollten wir umsetzen?",
		"Wie härten wir den Server ab?",
		"Gibt es NIST-Controls dafür?",
		"OWASP Best Practice für Logging?",
		"BSI Grundschutz Bausteine",
	}
	plain := []string{
		"Welche Anforderungen bestehen an Security Updates?",
		"Ab wann braucht man einen Datenschutzbeauftragten?",
	}
	for _, q := range wants {
		if !queryWantsControls(q) {
			t.Errorf("should detect control/implementation intent: %q", q)
		}
	}
	for _, q := range plain {
		if queryWantsControls(q) {
			t.Errorf("should NOT detect control intent (norm question): %q", q)
		}
	}
}

func TestRerank_ControlQuestion_StandardMayWin(t *testing.T) {
	// Explicit implementation intent + standard semantically competitive → standard wins.
	results := []LegalSearchResult{
		intentRes("NIST SP 800-82", "technical_standard", 0.62, 80),
		intentRes("CRA", "binding_law", 0.58, 100),
	}
	out := rerankByAuthority("Welche Controls passen zu Security Updates?", results)
	if out[0].SourceClass != "technical_standard" {
		t.Errorf("control question: technical_standard should win Top-1, got %s", out[0].SourceClass)
	}
}

func TestRerank_NormQuestion_BindingOverStandard(t *testing.T) {
	// "Anforderungen" → no control intent → binding stays Top-1 over the standard.
	results := []LegalSearchResult{
		intentRes("NIST SP 800-82", "technical_standard", 0.62, 80),
		intentRes("CRA", "binding_law", 0.58, 100),
	}
	out := rerankByAuthority("Welche Anforderungen bestehen an Security Updates?", results)
	if out[0].SourceClass != "binding_law" {
		t.Errorf("norm question: binding must stay Top-1 over standard, got %s", out[0].SourceClass)
	}
}

func TestRerank_OffTopicStandard_BlockedByGuard(t *testing.T) {
	// Control intent present, but the standard is semantically far below binding →
	// the margin guard keeps binding Top-1 (no off-topic standard override).
	results := []LegalSearchResult{
		intentRes("NIST SP 800-82", "technical_standard", 0.40, 80),
		intentRes("CRA", "binding_law", 0.58, 100),
	}
	out := rerankByAuthority("Welche Controls passen zu Security Updates?", results)
	if out[0].SourceClass != "binding_law" {
		t.Errorf("off-topic standard must not win even with control intent, got %s", out[0].SourceClass)
	}
}