package ucca

import (
	"os"
	"path/filepath"
	"testing"
)

// ============================================================================
// HR Domain Context Tests
// ============================================================================

func TestHRContext_AutomatedRejection_BLOCK(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		UseCaseText: "KI generiert und versendet Absagen automatisch",
		Domain:      DomainHR,
		DataTypes:   DataTypes{PersonalData: true, EmployeeData: true},
		HRContext: &HRContext{
			AutomatedScreening: true,
			AutomatedRejection: true,
		},
	}

	result := engine.Evaluate(intake)

	if result.Feasibility != FeasibilityNO {
		t.Errorf("Expected NO feasibility for automated rejection, got %s", result.Feasibility)
	}
	if !result.Art22Risk {
		t.Error("Expected Art22Risk=true for automated rejection")
	}
}

func TestHRContext_ScreeningWithHumanReview_OK(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		UseCaseText: "KI sortiert Bewerber vor, Mensch prueft jeden Vorschlag",
		Domain:      DomainHR,
		DataTypes:   DataTypes{PersonalData: true, EmployeeData: true},
		HRContext: &HRContext{
			AutomatedScreening:  true,
			AutomatedRejection:  false,
			HumanReviewEnforced: true,
			BiasAuditsDone:      true,
		},
	}

	result := engine.Evaluate(intake)

	// Should NOT block — human review is enforced
	if result.Feasibility == FeasibilityNO {
		t.Error("Expected feasibility != NO when human review is enforced")
	}
}

func TestHRContext_AGGVisible_RiskIncrease(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intakeWithAGG := &UseCaseIntake{
		UseCaseText: "CV-Screening mit Foto und Name sichtbar",
		Domain:      DomainHR,
		DataTypes:   DataTypes{PersonalData: true, EmployeeData: true},
		HRContext:   &HRContext{AGGCategoriesVisible: true},
	}
	intakeWithout := &UseCaseIntake{
		UseCaseText: "CV-Screening anonymisiert",
		Domain:      DomainHR,
		DataTypes:   DataTypes{PersonalData: true, EmployeeData: true},
		HRContext:   &HRContext{AGGCategoriesVisible: false},
	}

	resultWith := engine.Evaluate(intakeWithAGG)
	resultWithout := engine.Evaluate(intakeWithout)

	if resultWith.RiskScore <= resultWithout.RiskScore {
		t.Errorf("Expected higher risk with AGG visible (%d) vs without (%d)",
			resultWith.RiskScore, resultWithout.RiskScore)
	}
}

// ============================================================================
// Education Domain Context Tests
// ============================================================================

func TestEducationContext_MinorsWithoutTeacher_BLOCK(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		UseCaseText: "KI bewertet Schuelerarbeiten ohne Lehrkraft-Pruefung",
		Domain:      DomainEducation,
		DataTypes:   DataTypes{PersonalData: true, MinorData: true},
		EducationContext: &EducationContext{
			GradeInfluence:        true,
			MinorsInvolved:        true,
			TeacherReviewRequired: false,
		},
	}

	result := engine.Evaluate(intake)

	if result.Feasibility != FeasibilityNO {
		t.Errorf("Expected NO feasibility for minors without teacher review, got %s", result.Feasibility)
	}
}

func TestEducationContext_WithTeacherReview_Allowed(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		UseCaseText: "KI schlaegt Noten vor, Lehrkraft prueft und entscheidet",
		Domain:      DomainEducation,
		DataTypes:   DataTypes{PersonalData: true, MinorData: true},
		EducationContext: &EducationContext{
			GradeInfluence:        true,
			MinorsInvolved:        true,
			TeacherReviewRequired: true,
		},
	}

	result := engine.Evaluate(intake)

	if result.Feasibility == FeasibilityNO {
		t.Error("Expected feasibility != NO when teacher review is required")
	}
}

// ============================================================================
// Healthcare Domain Context Tests
// ============================================================================

func TestHealthcareContext_MDRWithoutValidation_BLOCK(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		UseCaseText: "KI-Diagnosetool als Medizinprodukt ohne klinische Validierung",
		Domain:      DomainHealthcare,
		DataTypes:   DataTypes{PersonalData: true, Article9Data: true},
		HealthcareContext: &HealthcareContext{
			DiagnosisSupport: true,
			MedicalDevice:    true,
			ClinicalValidation: false,
		},
	}

	result := engine.Evaluate(intake)

	if result.Feasibility != FeasibilityNO {
		t.Errorf("Expected NO for medical device without clinical validation, got %s", result.Feasibility)
	}
}

func TestHealthcareContext_Triage_HighRisk(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		UseCaseText: "KI priorisiert Patienten in der Notaufnahme",
		Domain:      DomainHealthcare,
		DataTypes:   DataTypes{PersonalData: true, Article9Data: true},
		HealthcareContext: &HealthcareContext{
			TriageDecision:       true,
			PatientDataProcessed: true,
		},
	}

	result := engine.Evaluate(intake)

	if result.RiskScore < 40 {
		t.Errorf("Expected high risk score for triage, got %d", result.RiskScore)
	}
	if !result.DSFARecommended {
		t.Error("Expected DSFA recommended for triage")
	}
}

// ============================================================================
// Critical Infrastructure Tests
// ============================================================================

func TestCriticalInfra_SafetyCriticalNoRedundancy_BLOCK(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		UseCaseText: "KI steuert Stromnetz ohne Fallback",
		Domain:      DomainEnergy,
		CriticalInfraContext: &CriticalInfraContext{
			GridControl:    true,
			SafetyCritical: true,
			RedundancyExists: false,
		},
	}

	result := engine.Evaluate(intake)

	if result.Feasibility != FeasibilityNO {
		t.Errorf("Expected NO for safety-critical without redundancy, got %s", result.Feasibility)
	}
}

// ============================================================================
// Marketing — Deepfake BLOCK Test
// ============================================================================

func TestMarketing_DeepfakeUnlabeled_BLOCK(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		UseCaseText: "KI generiert Werbevideos ohne Kennzeichnung",
		Domain:      DomainMarketing,
		MarketingContext: &MarketingContext{
			DeepfakeContent: true,
			AIContentLabeled: false,
		},
	}

	result := engine.Evaluate(intake)

	if result.Feasibility != FeasibilityNO {
		t.Errorf("Expected NO for unlabeled deepfakes, got %s", result.Feasibility)
	}
}

func TestMarketing_DeepfakeLabeled_OK(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		UseCaseText: "KI generiert Werbevideos mit Kennzeichnung",
		Domain:      DomainMarketing,
		MarketingContext: &MarketingContext{
			DeepfakeContent: true,
			AIContentLabeled: true,
		},
	}

	result := engine.Evaluate(intake)

	if result.Feasibility == FeasibilityNO {
		t.Error("Expected feasibility != NO when deepfakes are properly labeled")
	}
}

// ============================================================================
// Manufacturing — Safety BLOCK Test
// ============================================================================

func TestManufacturing_SafetyUnvalidated_BLOCK(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		UseCaseText: "KI in Maschinensicherheit ohne Validierung",
		Domain:      DomainMechanicalEngineering,
		ManufacturingContext: &ManufacturingContext{
			MachineSafety:   true,
			SafetyValidated: false,
		},
	}

	result := engine.Evaluate(intake)

	if result.Feasibility != FeasibilityNO {
		t.Errorf("Expected NO for unvalidated machine safety, got %s", result.Feasibility)
	}
}

// ============================================================================
// AGG V2 Obligations Loading Test
// ============================================================================

func TestAGGV2_LoadsFromManifest(t *testing.T) {
	regs, err := LoadAllV2Regulations()
	if err != nil {
		t.Fatalf("Failed to load v2 regulations: %v", err)
	}

	agg, ok := regs["agg"]
	if !ok {
		t.Fatal("agg not found in loaded regulations")
	}

	if len(agg.Obligations) < 8 {
		t.Errorf("Expected at least 8 AGG obligations, got %d", len(agg.Obligations))
	}

	// Check first obligation
	if agg.Obligations[0].ID != "AGG-OBL-001" {
		t.Errorf("Expected first ID 'AGG-OBL-001', got '%s'", agg.Obligations[0].ID)
	}
}

func TestAGGApplicability_Germany(t *testing.T) {
	regs, err := LoadAllV2Regulations()
	if err != nil {
		t.Fatalf("Failed to load v2 regulations: %v", err)
	}

	module := NewJSONRegulationModule(regs["agg"])

	factsDE := &UnifiedFacts{Organization: OrganizationFacts{Country: "DE"}}
	if !module.IsApplicable(factsDE) {
		t.Error("AGG should be applicable for German company")
	}

	factsUS := &UnifiedFacts{Organization: OrganizationFacts{Country: "US"}}
	if module.IsApplicable(factsUS) {
		t.Error("AGG should NOT be applicable for US company")
	}
}

// ============================================================================
// AI Act V2 Extended Obligations Test
// ============================================================================

func TestAIActV2_ExtendedObligations(t *testing.T) {
	regs, err := LoadAllV2Regulations()
	if err != nil {
		t.Fatalf("Failed to load v2 regulations: %v", err)
	}

	aiAct, ok := regs["ai_act"]
	if !ok {
		t.Fatal("ai_act not found in loaded regulations")
	}

	if len(aiAct.Obligations) < 75 {
		t.Errorf("Expected at least 75 AI Act obligations (expanded), got %d", len(aiAct.Obligations))
	}

	// Check GPAI obligations exist (Art. 51-56)
	hasGPAI := false
	for _, obl := range aiAct.Obligations {
		if obl.ID == "AIACT-OBL-078" { // GPAI classification
			hasGPAI = true
			break
		}
	}
	if !hasGPAI {
		t.Error("Expected GPAI obligation AIACT-OBL-078 in expanded AI Act")
	}
}

// ============================================================================
// Field Resolver Tests — Domain Contexts
// ============================================================================

func TestFieldResolver_HRContext(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		HRContext: &HRContext{AutomatedScreening: true},
	}

	val := engine.getFieldValue("hr_context.automated_screening", intake)
	if val != true {
		t.Errorf("Expected true for hr_context.automated_screening, got %v", val)
	}

	val2 := engine.getFieldValue("hr_context.automated_rejection", intake)
	if val2 != false {
		t.Errorf("Expected false for hr_context.automated_rejection, got %v", val2)
	}
}

func TestFieldResolver_NilContext(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{} // No HR context

	val := engine.getFieldValue("hr_context.automated_screening", intake)
	if val != nil {
		t.Errorf("Expected nil for nil HR context, got %v", val)
	}
}

func TestFieldResolver_HealthcareContext(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		HealthcareContext: &HealthcareContext{
			TriageDecision: true,
			MedicalDevice:  false,
		},
	}

	val := engine.getFieldValue("healthcare_context.triage_decision", intake)
	if val != true {
		t.Errorf("Expected true, got %v", val)
	}

	val2 := engine.getFieldValue("healthcare_context.medical_device", intake)
	if val2 != false {
		t.Errorf("Expected false, got %v", val2)
	}
}

// ============================================================================
// Hospitality — Review Manipulation BLOCK
// ============================================================================

func TestHospitality_ReviewManipulation_BLOCK(t *testing.T) {
	root := getProjectRoot(t)
	policyPath := filepath.Join(root, "policies", "ucca_policy_v1.yaml")
	engine, err := NewPolicyEngineFromPath(policyPath)
	if err != nil {
		t.Fatalf("Failed to create policy engine: %v", err)
	}

	intake := &UseCaseIntake{
		UseCaseText: "KI generiert Fake-Bewertungen",
		Domain:      DomainHospitality,
		HospitalityContext: &HospitalityContext{
			ReviewManipulation: true,
		},
	}

	result := engine.Evaluate(intake)

	if result.Feasibility != FeasibilityNO {
		t.Errorf("Expected NO for review manipulation, got %s", result.Feasibility)
	}
}

// ============================================================================
// Total Obligations Count
// ============================================================================

func TestTotalObligationsCount(t *testing.T) {
	regs, err := LoadAllV2Regulations()
	if err != nil {
		t.Fatalf("Failed to load v2 regulations: %v", err)
	}

	total := 0
	for _, reg := range regs {
		total += len(reg.Obligations)
	}

	// We expect at least 350 obligations across all regulations
	if total < 350 {
		t.Errorf("Expected at least 350 total obligations, got %d", total)
	}

	t.Logf("Total obligations across all regulations: %d", total)
	for id, reg := range regs {
		t.Logf("  %s: %d obligations", id, len(reg.Obligations))
	}
}

// ============================================================================
// Domain constant existence checks
// ============================================================================

func TestDomainConstants_Exist(t *testing.T) {
	domains := []Domain{
		DomainHR, DomainEducation, DomainHealthcare,
		DomainFinance, DomainBanking, DomainInsurance,
		DomainEnergy, DomainUtilities,
		DomainAutomotive, DomainAerospace,
		DomainRetail, DomainEcommerce,
		DomainMarketing, DomainMedia,
		DomainLogistics, DomainConstruction,
		DomainPublicSector, DomainDefense,
		DomainMechanicalEngineering,
	}

	for _, d := range domains {
		if d == "" {
			t.Error("Empty domain constant found")
		}
	}
}