package webui

import (
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"

	"bee/audit/internal/platform"
)

func TestChartLegendNumber(t *testing.T) {
	tests := []struct {
		in   float64
		want string
	}{
		{in: 0.4, want: "0"},
		{in: 61.5, want: "62"},
		{in: 999.4, want: "999"},
		{in: 1200, want: "1,2k"},
		{in: 1250, want: "1,25k"},
		{in: 1310, want: "1,31k"},
		{in: 1500, want: "1,5k"},
		{in: 2600, want: "2,6k"},
		{in: 10200, want: "10k"},
	}
	for _, tc := range tests {
		if got := chartLegendNumber(tc.in); got != tc.want {
			t.Fatalf("chartLegendNumber(%v)=%q want %q", tc.in, got, tc.want)
		}
	}
}

func TestChartDataFromSamplesUsesFullHistory(t *testing.T) {
	samples := []platform.LiveMetricSample{
		{
			Timestamp:  time.Now().Add(-3 * time.Minute),
			CPULoadPct: 10,
			MemLoadPct: 20,
			PowerW:     300,
			GPUs: []platform.GPUMetricRow{
				{GPUIndex: 0, UsagePct: 90, MemUsagePct: 5, PowerW: 120, TempC: 50},
			},
		},
		{
			Timestamp:  time.Now().Add(-2 * time.Minute),
			CPULoadPct: 30,
			MemLoadPct: 40,
			PowerW:     320,
			GPUs: []platform.GPUMetricRow{
				{GPUIndex: 0, UsagePct: 95, MemUsagePct: 7, PowerW: 125, TempC: 51},
			},
		},
		{
			Timestamp:  time.Now().Add(-1 * time.Minute),
			CPULoadPct: 50,
			MemLoadPct: 60,
			PowerW:     340,
			GPUs: []platform.GPUMetricRow{
				{GPUIndex: 0, UsagePct: 97, MemUsagePct: 9, PowerW: 130, TempC: 52},
			},
		},
	}

	datasets, names, labels, title, _, _, ok := chartDataFromSamples("gpu-all-power", samples)
	if !ok {
		t.Fatal("chartDataFromSamples returned ok=false")
	}
	if title != "GPU Power" {
		t.Fatalf("title=%q", title)
	}
	if len(names) != 1 || names[0] != "GPU 0" {
		t.Fatalf("names=%v", names)
	}
	if len(labels) != len(samples) {
		t.Fatalf("labels len=%d want %d", len(labels), len(samples))
	}
	if len(datasets) != 1 || len(datasets[0]) != len(samples) {
		t.Fatalf("datasets shape=%v", datasets)
	}
	if got := datasets[0][0]; got != 120 {
		t.Fatalf("datasets[0][0]=%v want 120", got)
	}
	if got := datasets[0][2]; got != 130 {
		t.Fatalf("datasets[0][2]=%v want 130", got)
	}
}

func TestNormalizePowerSeriesHoldsLastPositive(t *testing.T) {
	got := normalizePowerSeries([]float64{0, 480, 0, 0, 510, 0})
	want := []float64{0, 480, 480, 480, 510, 510}
	if len(got) != len(want) {
		t.Fatalf("len=%d want %d", len(got), len(want))
	}
	for i := range want {
		if got[i] != want[i] {
			t.Fatalf("got[%d]=%v want %v", i, got[i], want[i])
		}
	}
}

func TestRootRendersDashboard(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "audit.json")
	exportDir := filepath.Join(dir, "export")
	if err := os.MkdirAll(exportDir, 0755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(path, []byte(`{"collected_at":"2026-03-15T00:00:00Z","hardware":{"board":{"serial_number":"SERIAL-OLD"}}}`), 0644); err != nil {
		t.Fatal(err)
	}

	handler := NewHandler(HandlerOptions{
		Title:     "Bee Hardware Audit",
		AuditPath: path,
		ExportDir: exportDir,
	})

	first := httptest.NewRecorder()
	handler.ServeHTTP(first, httptest.NewRequest(http.MethodGet, "/", nil))
	if first.Code != http.StatusOK {
		t.Fatalf("first status=%d", first.Code)
	}
	// Dashboard should contain the audit nav link and hardware summary
	if !strings.Contains(first.Body.String(), `href="/audit"`) {
		t.Fatalf("first body missing audit nav link: %s", first.Body.String())
	}
	if !strings.Contains(first.Body.String(), `/viewer`) {
		t.Fatalf("first body missing viewer link: %s", first.Body.String())
	}
	if got := first.Header().Get("Cache-Control"); got != "no-store" {
		t.Fatalf("first cache-control=%q", got)
	}

	if err := os.WriteFile(path, []byte(`{"collected_at":"2026-03-15T00:05:00Z","hardware":{"board":{"serial_number":"SERIAL-NEW"}}}`), 0644); err != nil {
		t.Fatal(err)
	}

	second := httptest.NewRecorder()
	handler.ServeHTTP(second, httptest.NewRequest(http.MethodGet, "/", nil))
	if second.Code != http.StatusOK {
		t.Fatalf("second status=%d", second.Code)
	}
	if !strings.Contains(second.Body.String(), `Hardware Summary`) {
		t.Fatalf("second body missing hardware summary: %s", second.Body.String())
	}
}

func TestRootShowsRunAuditButtonWhenSnapshotMissing(t *testing.T) {
	dir := t.TempDir()
	exportDir := filepath.Join(dir, "export")
	if err := os.MkdirAll(exportDir, 0755); err != nil {
		t.Fatal(err)
	}

	handler := NewHandler(HandlerOptions{
		Title:     "Bee Hardware Audit",
		AuditPath: filepath.Join(dir, "missing-audit.json"),
		ExportDir: exportDir,
	})

	rec := httptest.NewRecorder()
	handler.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, "/", nil))
	if rec.Code != http.StatusOK {
		t.Fatalf("status=%d", rec.Code)
	}
	body := rec.Body.String()
	if !strings.Contains(body, `Run Audit`) {
		t.Fatalf("dashboard missing run audit button: %s", body)
	}
	if strings.Contains(body, `No audit data`) {
		t.Fatalf("dashboard still shows empty audit badge: %s", body)
	}
}

func TestAuditPageRendersViewerFrameAndActions(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "audit.json")
	if err := os.WriteFile(path, []byte(`{"collected_at":"2026-03-15T00:00:00Z"}`), 0644); err != nil {
		t.Fatal(err)
	}

	handler := NewHandler(HandlerOptions{AuditPath: path})
	rec := httptest.NewRecorder()
	handler.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, "/audit", nil))
	if rec.Code != http.StatusOK {
		t.Fatalf("status=%d", rec.Code)
	}
	body := rec.Body.String()
	if !strings.Contains(body, `iframe class="viewer-frame" src="/viewer"`) {
		t.Fatalf("audit page missing viewer frame: %s", body)
	}
	if !strings.Contains(body, `openAuditModal()`) {
		t.Fatalf("audit page missing action modal trigger: %s", body)
	}
}

func TestViewerRendersLatestSnapshot(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "audit.json")
	if err := os.WriteFile(path, []byte(`{"collected_at":"2026-03-15T00:00:00Z","hardware":{"board":{"serial_number":"SERIAL-OLD"}}}`), 0644); err != nil {
		t.Fatal(err)
	}

	handler := NewHandler(HandlerOptions{AuditPath: path})
	first := httptest.NewRecorder()
	handler.ServeHTTP(first, httptest.NewRequest(http.MethodGet, "/viewer", nil))
	if first.Code != http.StatusOK {
		t.Fatalf("first status=%d", first.Code)
	}
	if !strings.Contains(first.Body.String(), "SERIAL-OLD") {
		t.Fatalf("viewer body missing old serial: %s", first.Body.String())
	}

	if err := os.WriteFile(path, []byte(`{"collected_at":"2026-03-15T00:05:00Z","hardware":{"board":{"serial_number":"SERIAL-NEW"}}}`), 0644); err != nil {
		t.Fatal(err)
	}

	second := httptest.NewRecorder()
	handler.ServeHTTP(second, httptest.NewRequest(http.MethodGet, "/viewer", nil))
	if second.Code != http.StatusOK {
		t.Fatalf("second status=%d", second.Code)
	}
	if !strings.Contains(second.Body.String(), "SERIAL-NEW") {
		t.Fatalf("viewer body missing new serial: %s", second.Body.String())
	}
	if strings.Contains(second.Body.String(), "SERIAL-OLD") {
		t.Fatalf("viewer body still contains old serial: %s", second.Body.String())
	}
}

func TestAuditJSONServesLatestSnapshot(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "audit.json")
	body := `{"hardware":{"board":{"serial_number":"SERIAL-API"}}}`
	if err := os.WriteFile(path, []byte(body), 0644); err != nil {
		t.Fatal(err)
	}

	handler := NewHandler(HandlerOptions{AuditPath: path})
	rec := httptest.NewRecorder()
	handler.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, "/audit.json", nil))
	if rec.Code != http.StatusOK {
		t.Fatalf("status=%d", rec.Code)
	}
	if !strings.Contains(rec.Body.String(), "SERIAL-API") {
		t.Fatalf("body missing expected serial: %s", rec.Body.String())
	}
	if got := rec.Header().Get("Content-Type"); !strings.Contains(got, "application/json") {
		t.Fatalf("content-type=%q", got)
	}
}

func TestMissingAuditJSONReturnsNotFound(t *testing.T) {
	handler := NewHandler(HandlerOptions{AuditPath: "/missing/audit.json"})
	rec := httptest.NewRecorder()
	handler.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, "/audit.json", nil))
	if rec.Code != http.StatusNotFound {
		t.Fatalf("status=%d want %d", rec.Code, http.StatusNotFound)
	}
}

func TestSupportBundleEndpointReturnsArchive(t *testing.T) {
	dir := t.TempDir()
	exportDir := filepath.Join(dir, "export")
	if err := os.MkdirAll(exportDir, 0755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(exportDir, "bee-audit.log"), []byte("audit log"), 0644); err != nil {
		t.Fatal(err)
	}
	archive, err := os.CreateTemp(os.TempDir(), "bee-support-server-test-*.tar.gz")
	if err != nil {
		t.Fatal(err)
	}
	t.Cleanup(func() { _ = os.Remove(archive.Name()) })
	if _, err := archive.WriteString("support-bundle"); err != nil {
		t.Fatal(err)
	}
	if err := archive.Close(); err != nil {
		t.Fatal(err)
	}

	handler := NewHandler(HandlerOptions{ExportDir: exportDir})
	rec := httptest.NewRecorder()
	handler.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, "/export/support.tar.gz", nil))
	if rec.Code != http.StatusOK {
		t.Fatalf("status=%d body=%s", rec.Code, rec.Body.String())
	}
	if got := rec.Header().Get("Content-Disposition"); !strings.Contains(got, "attachment;") {
		t.Fatalf("content-disposition=%q", got)
	}
	if rec.Body.Len() == 0 {
		t.Fatal("empty archive body")
	}
}

func TestRuntimeHealthEndpointReturnsJSON(t *testing.T) {
	dir := t.TempDir()
	exportDir := filepath.Join(dir, "export")
	if err := os.MkdirAll(exportDir, 0755); err != nil {
		t.Fatal(err)
	}
	body := `{"status":"PARTIAL","checked_at":"2026-03-16T10:00:00Z"}`
	if err := os.WriteFile(filepath.Join(exportDir, "runtime-health.json"), []byte(body), 0644); err != nil {
		t.Fatal(err)
	}

	handler := NewHandler(HandlerOptions{ExportDir: exportDir})
	rec := httptest.NewRecorder()
	handler.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, "/runtime-health.json", nil))
	if rec.Code != http.StatusOK {
		t.Fatalf("status=%d body=%s", rec.Code, rec.Body.String())
	}
	if strings.TrimSpace(rec.Body.String()) != body {
		t.Fatalf("body=%q want %q", strings.TrimSpace(rec.Body.String()), body)
	}
}