package alertreceiverconformance

import (
	"strings"
	"testing"
	"time"
)

func TestEvaluateRealReceiverCoverageAndFormalDrill(t *testing.T) {
	t.Parallel()
	routes, tests, incident, capture, now := conformanceFixture("REAL")
	report := Evaluate(routes, tests, incident, capture, "0.64.0-rc.1", "sha256:"+strings.Repeat("a", 64), now)
	if report.Result != "PASS" || report.EvidenceScope != "REAL_RECEIVER" || report.ExternalValidationRequired || !report.FormalDrillVerified || report.ActiveRouteCount != 1 || len(report.RouteCoverage) != 1 || report.RouteCoverage[0].Status != "PASS" {
		t.Fatalf("unexpected report: %+v", report)
	}
}

func TestEvaluateMockOrMissingMappingCannotCompleteExternalGate(t *testing.T) {
	t.Parallel()
	routes, tests, incident, capture, now := conformanceFixture("MOCK")
	report := Evaluate(routes, tests, incident, capture, "0.64.0-rc.1", "sha256:"+strings.Repeat("a", 64), now)
	if report.Result != "PASS" || report.EvidenceScope != "MOCK_RECEIVER" || !report.ExternalValidationRequired {
		t.Fatalf("mock result did not preserve external gate: %+v", report)
	}
	capture.GroupMappings = capture.GroupMappings[:1]
	report = Evaluate(routes, tests, incident, capture, "0.64.0-rc.1", "sha256:"+strings.Repeat("a", 64), now)
	if report.Result != "FAIL" {
		t.Fatal("missing escalation receiver mapping was accepted")
	}
}

func TestParseCaptureAndReportRejectUnknownFields(t *testing.T) {
	t.Parallel()
	if _, err := ParseCapture([]byte(`{"schema_version":"alert-receiver-capture-v1","unexpected":true}`)); err == nil {
		t.Fatal("unknown capture field was accepted")
	}
	if _, err := ParseReport([]byte(`{"schema_version":"alert-receiver-conformance-report-v1","unexpected":true}`)); err == nil {
		t.Fatal("unknown report field was accepted")
	}
}

func conformanceFixture(source string) (CloudRoutes, CloudTests, CloudIncident, ReceiverCapture, time.Time) {
	now := time.Date(2026, 8, 25, 12, 0, 0, 0, time.UTC)
	routeID := "10000000-0000-0000-0000-000000000001"
	tenantID := "20000000-0000-0000-0000-000000000001"
	testID := "30000000-0000-0000-0000-000000000001"
	testRef := "40000000-0000-0000-0000-000000000001"
	incidentID := "50000000-0000-0000-0000-000000000001"
	completed := now.Add(-8 * time.Minute)
	resolved := now.Add(-2 * time.Minute)
	routes := CloudRoutes{Items: []CloudRoute{{
		ID: routeID, TenantID: tenantID, Category: "TECHNICAL", Severity: "HIGH", Status: "ACTIVE",
		ReceiverGroup: "platform-oncall", EscalationReceiverGroup: "incident-command", RunbookRef: "runbook://platform/alerts",
		CreatedAt: now.Add(-time.Hour), UpdatedAt: now.Add(-time.Hour),
	}}}
	tests := CloudTests{Items: []CloudTest{{
		ID: testID, TestRef: testRef, RoutingPolicyID: routeID, ReceiverGroup: "platform-oncall", Status: "DELIVERED",
		AttemptCount: 1, CreatedAt: now.Add(-10 * time.Minute), CompletedAt: &completed,
	}}}
	group := "platform-oncall"
	incident := CloudIncident{ID: incidentID, Status: "RESOLVED", ReceiverGroup: &group, FirstDetected: now.Add(-6 * time.Minute), ResolvedAt: &resolved, Actions: []CloudAction{{ActionType: "ACKNOWLEDGED", CreatedAt: now.Add(-4 * time.Minute)}}}
	capture := ReceiverCapture{
		SchemaVersion: CaptureSchema, EvidenceSource: source, CandidateVersion: "0.64.0-rc.1", BuildDigest: "sha256:" + strings.Repeat("a", 64), ReceiverSystem: "pager-gateway:production", CollectedAt: now,
		GroupMappings: []GroupMapping{
			{ReceiverGroup: "platform-oncall", MappedTargetRefs: []string{"pager-service:platform-primary"}, VerifiedAt: now.Add(-7 * time.Minute)},
			{ReceiverGroup: "incident-command", MappedTargetRefs: []string{"pager-service:incident-command"}, VerifiedAt: now.Add(-7 * time.Minute)},
		},
		TestReceipts: []TestReceipt{{TestRef: testRef, EventID: testID, ReceiverGroup: "platform-oncall", DeliveryCount: 1, SignatureVerified: true, ReceivedAt: completed.Add(-time.Second)}},
		FormalDrill:  FormalDrillCapture{IncidentID: incidentID, ReceiverGroup: "platform-oncall", DeliveryCount: 1, SignatureVerified: true, ControlledDrill: true, ReceivedAt: now.Add(-5 * time.Minute), AcknowledgedAt: now.Add(-4 * time.Minute), AcknowledgementRef: "incident-ticket:masked-001"},
	}
	return routes, tests, incident, capture, now
}