package collector

import (
	"bee/audit/internal/schema"
	"testing"
)

func TestParseNVIDIASMIQuery(t *testing.T) {
	raw := "0, 00000000:65:00.0, NVIDIA H100 80GB HBM3, GPU-SERIAL-1, 96.00.1F.00.02, 54, 210.33, 0, 5, Not Active, 4, 4, 16, 16\n"
	byBDF, err := parseNVIDIASMIQuery(raw)
	if err != nil {
		t.Fatalf("parse failed: %v", err)
	}

	gpu, ok := byBDF["0000:65:00.0"]
	if !ok {
		t.Fatalf("gpu by normalized bdf not found")
	}
	if gpu.Name != "NVIDIA H100 80GB HBM3" {
		t.Fatalf("name: got %q", gpu.Name)
	}
	if gpu.Serial != "GPU-SERIAL-1" {
		t.Fatalf("serial: got %q", gpu.Serial)
	}
	if gpu.VBIOS != "96.00.1F.00.02" {
		t.Fatalf("vbios: got %q", gpu.VBIOS)
	}
	if gpu.ECCUncorrected == nil || *gpu.ECCUncorrected != 0 {
		t.Fatalf("ecc uncorrected: got %v", gpu.ECCUncorrected)
	}
	if gpu.HWSlowdown == nil || *gpu.HWSlowdown {
		t.Fatalf("hw slowdown: got %v, want false", gpu.HWSlowdown)
	}
	if gpu.PCIeLinkGenCurrent == nil || *gpu.PCIeLinkGenCurrent != 4 {
		t.Fatalf("pcie link gen current: got %v, want 4", gpu.PCIeLinkGenCurrent)
	}
	if gpu.PCIeLinkGenMax == nil || *gpu.PCIeLinkGenMax != 4 {
		t.Fatalf("pcie link gen max: got %v, want 4", gpu.PCIeLinkGenMax)
	}
}

func TestNormalizePCIeBDF(t *testing.T) {
	tests := []struct {
		in   string
		want string
	}{
		{"00000000:17:00.0", "0000:17:00.0"},
		{"0000:17:00.0", "0000:17:00.0"},
		{"17:00.0", "0000:17:00.0"},
	}
	for _, tt := range tests {
		got := normalizePCIeBDF(tt.in)
		if got != tt.want {
			t.Fatalf("normalizePCIeBDF(%q)=%q want %q", tt.in, got, tt.want)
		}
	}
}

func TestEnrichPCIeWithNVIDIAData_driverLoaded(t *testing.T) {
	vendorID := NvidiaVendorID
	bdf := "0000:65:00.0"
	manufacturer := "NVIDIA Corporation"
	status := "OK"
	devices := []schema.HardwarePCIeDevice{
		{
			HardwareComponentStatus: schema.HardwareComponentStatus{Status: &status},
			VendorID:                &vendorID,
			BDF:                     &bdf,
			Manufacturer:            &manufacturer,
		},
	}

	byBDF := map[string]nvidiaGPUInfo{
		"0000:65:00.0": {
			BDF:            "0000:65:00.0",
			Serial:         "GPU-ABC",
			VBIOS:          "96.00.1F.00.02",
			ECCUncorrected: ptrInt64(2),
			ECCCorrected:   ptrInt64(10),
			TemperatureC:   ptrFloat(55.5),
			PowerW:         ptrFloat(230.2),
		},
	}

	out := enrichPCIeWithNVIDIAData(devices, byBDF, true)
	if out[0].SerialNumber == nil || *out[0].SerialNumber != "GPU-ABC" {
		t.Fatalf("serial: got %v", out[0].SerialNumber)
	}
	if out[0].Firmware == nil || *out[0].Firmware != "96.00.1F.00.02" {
		t.Fatalf("firmware: got %v", out[0].Firmware)
	}
	if out[0].Telemetry == nil || out[0].Telemetry["nvidia_gpu_index"] != 0 {
		t.Fatalf("telemetry nvidia_gpu_index: got %#v", out[0].Telemetry)
	}
	if out[0].Status == nil || *out[0].Status != statusWarning {
		t.Fatalf("status: got %v", out[0].Status)
	}
	if out[0].ECCUncorrectedTotal == nil || *out[0].ECCUncorrectedTotal != 2 {
		t.Fatalf("ecc_uncorrected_total: got %#v", out[0].ECCUncorrectedTotal)
	}
	if out[0].TemperatureC == nil || *out[0].TemperatureC != 55.5 {
		t.Fatalf("temperature_c: got %#v", out[0].TemperatureC)
	}
}

func TestEnrichPCIeWithNVIDIAData_driverMissingFallback(t *testing.T) {
	vendorID := NvidiaVendorID
	bdf := "0000:17:00.0"
	manufacturer := "NVIDIA Corporation"
	devices := []schema.HardwarePCIeDevice{
		{
			VendorID:     &vendorID,
			BDF:          &bdf,
			Manufacturer: &manufacturer,
		},
	}

	out := enrichPCIeWithNVIDIAData(devices, nil, false)
	if out[0].SerialNumber != nil {
		t.Fatalf("serial should stay nil without source data, got %v", out[0].SerialNumber)
	}
	if out[0].Status == nil || *out[0].Status != statusUnknown {
		t.Fatalf("fallback status: got %v", out[0].Status)
	}
}

func ptrInt64(v int64) *int64     { return &v }
func ptrFloat(v float64) *float64 { return &v }

func TestParseNVIDIANVLinkStatusByGPU(t *testing.T) {
	// Real-world 2-GPU direct-bridge H100 SXM output: link 15 inactive on both GPUs.
	input := `GPU 0: NVIDIA H100 80GB HBM3 (UUID: GPU-a59f6931-c099-8fba-a0b3-08469d86f140)
	 Link 0: 26.562 GB/s
	 Link 15: <inactive>
	 Link 17: 26.562 GB/s
GPU 1: NVIDIA H100 80GB HBM3 (UUID: GPU-603fe750-0516-9db5-86ec-ea61af3fce35)
	 Link 0: 26.562 GB/s
	 Link 15: <inactive>
`
	got := parseNVIDIANVLinkStatusByGPU(input)

	if len(got[0]) != 3 {
		t.Fatalf("gpu0 ports=%d want 3 (%#v)", len(got[0]), got[0])
	}
	if got[0][1].Index != 15 || got[0][1].Active {
		t.Fatalf("gpu0 link15=%#v want inactive", got[0][1])
	}
	if got[0][0].SpeedGBs == nil || *got[0][0].SpeedGBs != 26.562 {
		t.Fatalf("gpu0 link0 speed=%#v want 26.562", got[0][0].SpeedGBs)
	}
	if len(got[1]) != 2 {
		t.Fatalf("gpu1 ports=%d want 2 (%#v)", len(got[1]), got[1])
	}
	if got[1][1].Active {
		t.Fatalf("gpu1 link15 should be inactive: %#v", got[1][1])
	}
}

func TestParseNVIDIANVLinkErrorsByGPU(t *testing.T) {
	input := `GPU 0: NVIDIA H100 80GB HBM3 (UUID: GPU-a59f6931-c099-8fba-a0b3-08469d86f140)
	 Link 0: Replay Errors: 0
	 Link 0: Recovery Errors: 0
	 Link 0: CRC Errors: 0
	 Link 1: Replay Errors: 3
	 Link 1: Recovery Errors: 1
	 Link 1: CRC Errors: 2
GPU 1: NVIDIA H100 80GB HBM3 (UUID: GPU-603fe750-0516-9db5-86ec-ea61af3fce35)
	 Link 0: Replay Errors: 0
	 Link 0: Recovery Errors: 0
	 Link 0: CRC Errors: 0
`
	got := parseNVIDIANVLinkErrorsByGPU(input)

	c := got[0][1]
	if c.Replay != 3 || c.Recovery != 1 || c.CRC != 2 {
		t.Fatalf("gpu0 link1 counters=%#v want {3,1,2}", c)
	}
	zero := got[0][0]
	if zero.Replay != 0 || zero.Recovery != 0 || zero.CRC != 0 {
		t.Fatalf("gpu0 link0 counters=%#v want all zero", zero)
	}
	if _, ok := got[1][0]; !ok {
		t.Fatalf("expected gpu1 link0 entry present")
	}
}

func TestEnrichPCIeWithNVIDIANVLinksAttachesPortsByIndex(t *testing.T) {
	oldStatus, oldErrors := nvlinkStatusFn, nvlinkErrorsFn
	t.Cleanup(func() { nvlinkStatusFn, nvlinkErrorsFn = oldStatus, oldErrors })

	nvlinkStatusFn = func() (map[int][]schema.HardwareNVLinkPort, error) {
		return map[int][]schema.HardwareNVLinkPort{
			0: {{Index: 0, Active: true, SpeedGBs: ptrFloat(26.562)}, {Index: 15, Active: false}},
		}, nil
	}
	nvlinkErrorsFn = func() (map[int]map[int]nvlinkErrorCounters, error) {
		return map[int]map[int]nvlinkErrorCounters{
			0: {0: {Replay: 1}},
		}, nil
	}

	devices := []schema.HardwarePCIeDevice{
		{Telemetry: map[string]any{"nvidia_gpu_index": 0}},
	}

	out := enrichPCIeWithNVIDIANVLinks(devices)

	if len(out[0].NVLinks) != 2 {
		t.Fatalf("nvlinks=%d want 2", len(out[0].NVLinks))
	}
	if out[0].NVLinks[0].ReplayErrors == nil || *out[0].NVLinks[0].ReplayErrors != 1 {
		t.Fatalf("link0 replay errors=%#v want 1", out[0].NVLinks[0].ReplayErrors)
	}
	if out[0].NVLinks[1].Active {
		t.Fatalf("link15 should stay inactive")
	}
}