package probes

import (
	"strings"
	"testing"

	"vetting/internal/spec"
)

func TestParseCPUInfoInto(t *testing.T) {
	sample := `processor	: 0
vendor_id	: GenuineIntel
model name	: Intel(R) N95
stepping	: 3
cpu cores	: 4
flags		: fpu vme de pse tsc msr aes sse4_2 vmx

processor	: 1
vendor_id	: GenuineIntel
model name	: Intel(R) N95
`
	var c spec.CPUSpec
	parseCPUInfoInto(strings.NewReader(sample), &c)
	if c.Model != "Intel(R) N95" {
		t.Fatalf("model: got %q", c.Model)
	}
	if c.Vendor != "GenuineIntel" {
		t.Fatalf("vendor: got %q", c.Vendor)
	}
	if c.Stepping != "3" {
		t.Fatalf("stepping: got %q", c.Stepping)
	}
	if c.PhysicalCores != 4 {
		t.Fatalf("physical cores: got %d", c.PhysicalCores)
	}
	// Only vmx, aes, sse4_2 should survive the allow-list filter.
	if len(c.Flags) != 3 {
		t.Fatalf("flags count: got %v", c.Flags)
	}
}

func TestParseOSRelease(t *testing.T) {
	in := `PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
VERSION_ID="12"
NAME=Debian
`
	dist, ver := parseOSRelease(in)
	if dist != "Debian GNU/Linux 12 (bookworm)" {
		t.Fatalf("distribution: got %q", dist)
	}
	if ver != "12" {
		t.Fatalf("version: got %q", ver)
	}
}

func TestParseDmidecodeSize(t *testing.T) {
	cases := []struct {
		in   string
		want int
	}{
		{"16 GB", 16},
		{"32 GiB", 32},
		{"8192 MB", 8},
		{"No Module Installed", 0},
		{"garbage", 0},
	}
	for _, c := range cases {
		if got := parseDmidecodeSize(c.in); got != c.want {
			t.Errorf("parseDmidecodeSize(%q) = %d, want %d", c.in, got, c.want)
		}
	}
}

func TestParseMTS(t *testing.T) {
	if n := parseMTS("3200 MT/s"); n != 3200 {
		t.Errorf("parseMTS MT/s: got %d", n)
	}
	if n := parseMTS("2400 MHz"); n != 2400 {
		t.Errorf("parseMTS MHz: got %d", n)
	}
	if n := parseMTS("Unknown"); n != 0 {
		t.Errorf("parseMTS unknown: got %d", n)
	}
}

func TestCleanDmidecodeValue(t *testing.T) {
	cases := map[string]string{
		"Micron":                 "Micron",
		"Not Specified":          "",
		"  Unknown  ":            "",
		"To Be Filled By O.E.M.": "",
		"":                       "",
	}
	for in, want := range cases {
		if got := cleanDmidecodeValue(in); got != want {
			t.Errorf("cleanDmidecodeValue(%q) = %q, want %q", in, got, want)
		}
	}
}

func TestParseDIMMs(t *testing.T) {
	// Two populated + two empty slots. Verifies the multi-section parser
	// produces the expected count and the empty-slot detection fires on
	// "No Module Installed".
	sample := `Handle 0x0032, DMI type 17, 84 bytes
Memory Device
	Size: 16 GB
	Locator: DIMM_A1
	Manufacturer: Micron
	Part Number: 8ATF2G64AZ-3G2E1
	Configured Memory Speed: 3200 MT/s

Handle 0x0033, DMI type 17, 84 bytes
Memory Device
	Size: No Module Installed
	Locator: DIMM_A2
	Manufacturer: Not Specified

Handle 0x0034, DMI type 17, 84 bytes
Memory Device
	Size: 16 GB
	Locator: DIMM_B1
	Manufacturer: Micron
	Part Number: 8ATF2G64AZ-3G2E1
	Speed: 3200 MT/s

Handle 0x0035, DMI type 17, 84 bytes
Memory Device
	Size: No Module Installed
	Locator: DIMM_B2
`
	dimms := parseDIMMs(strings.NewReader(sample), Logger{})
	if len(dimms) != 4 {
		t.Fatalf("expected 4 DIMM entries, got %d: %+v", len(dimms), dimms)
	}
	populated := 0
	for _, d := range dimms {
		if d.Populated {
			populated++
		}
	}
	if populated != 2 {
		t.Fatalf("expected 2 populated, got %d", populated)
	}
	if dimms[0].Slot != "DIMM_A1" || dimms[0].SizeGB != 16 || dimms[0].SpeedMTS != 3200 {
		t.Fatalf("DIMM_A1 mismatch: %+v", dimms[0])
	}
	if dimms[0].PartNumber != "8ATF2G64AZ-3G2E1" {
		t.Fatalf("DIMM_A1 part number mismatch: %q", dimms[0].PartNumber)
	}
	if dimms[1].Populated || dimms[1].Slot != "DIMM_A2" {
		t.Fatalf("DIMM_A2 should be empty: %+v", dimms[1])
	}
}

func TestParseLspciVerbose(t *testing.T) {
	sample := `01:00.0 VGA compatible controller: NVIDIA Corporation
	Subsystem: ASUSTeK
	Kernel driver in use: nvidia
	Memory at f6000000 (32-bit, non-prefetchable) [size=16M]
	Memory at c0000000 (64-bit, prefetchable) [size=8G]
	Memory at d0000000 (64-bit, prefetchable) [size=32M]
`
	vram, driver := parseLspciVerbose(sample)
	if vram != 8 {
		t.Errorf("VRAM: got %d, want 8", vram)
	}
	if driver != "nvidia" {
		t.Errorf("driver: got %q", driver)
	}
}