package probes

import (
	"strings"
	"testing"
)

// Golden dmidecode -t bios output (trimmed, representative). A real
// host will have more lines; parse must tolerate the unknown fields.
const dmidecodeBIOS = `# dmidecode 3.3
Getting SMBIOS data from sysfs.
SMBIOS 3.2.0 present.

Handle 0x0000, DMI type 0, 26 bytes
BIOS Information
	Vendor: American Megatrends Inc.
	Version: 3.2
	Release Date: 07/15/2021
	Address: 0xF0000
	Runtime Size: 64 kB
	ROM Size: 32 MB
	Characteristics:
		PCI is supported
		BIOS is upgradeable

Handle 0x0001, DMI type 1, 27 bytes
System Information
	Manufacturer: Supermicro
	Product Name: X11SSL-F
`

func TestParseDmidecodeBIOS(t *testing.T) {
	snap := parseDmidecodeBIOS(strings.NewReader(dmidecodeBIOS))
	if snap == nil {
		t.Fatal("parseDmidecodeBIOS returned nil")
	}
	if snap.Component != "bios" {
		t.Errorf("component = %q, want bios", snap.Component)
	}
	if snap.Version != "3.2" {
		t.Errorf("version = %q, want 3.2", snap.Version)
	}
	if snap.Vendor != "American Megatrends Inc." {
		t.Errorf("vendor = %q, want American Megatrends Inc.", snap.Vendor)
	}
	if snap.Raw["Release Date"] != "07/15/2021" {
		t.Errorf("release date = %q, want 07/15/2021", snap.Raw["Release Date"])
	}
}

func TestParseDmidecodeBIOSMissingBlock(t *testing.T) {
	// No BIOS Information block → nil result, not a crash.
	input := "Handle 0x0001, DMI type 1, 27 bytes\nSystem Information\n\tManufacturer: Acme\n"
	if snap := parseDmidecodeBIOS(strings.NewReader(input)); snap != nil {
		t.Fatalf("expected nil when BIOS block absent, got %+v", snap)
	}
}

const ipmitoolMCInfo = `Device ID                 : 32
Device Revision           : 1
Firmware Revision         : 1.74
IPMI Version              : 2.0
Manufacturer ID           : 10876
Manufacturer Name         : Supermicro
Product ID                : 2051 (0x0803)
Product Name              : Unknown (0x803)
`

func TestParseIpmitoolMCInfo(t *testing.T) {
	snap := parseIpmitoolMCInfo(strings.NewReader(ipmitoolMCInfo))
	if snap == nil {
		t.Fatal("parseIpmitoolMCInfo returned nil")
	}
	if snap.Component != "bmc" {
		t.Errorf("component = %q, want bmc", snap.Component)
	}
	if snap.Version != "1.74" {
		t.Errorf("version = %q, want 1.74", snap.Version)
	}
	if snap.Vendor != "Supermicro" {
		t.Errorf("vendor = %q, want Supermicro", snap.Vendor)
	}
}

func TestParseIpmitoolMCInfoEmpty(t *testing.T) {
	if snap := parseIpmitoolMCInfo(strings.NewReader("")); snap != nil {
		t.Fatalf("expected nil on empty input, got %+v", snap)
	}
}

const ethtoolEth0 = `driver: mlx5_core
version: 5.15.0
firmware-version: 16.32.1010 (MT_0000000008)
expansion-rom-version:
bus-info: 0000:5e:00.0
supports-statistics: yes
`

func TestParseEthtoolI(t *testing.T) {
	snap := parseEthtoolI(strings.NewReader(ethtoolEth0), "eth0")
	if snap == nil {
		t.Fatal("parseEthtoolI returned nil")
	}
	if snap.Component != "nic" || snap.Identifier != "eth0" {
		t.Errorf("component/id = %q/%q, want nic/eth0", snap.Component, snap.Identifier)
	}
	if snap.Version != "16.32.1010 (MT_0000000008)" {
		t.Errorf("version = %q, want 16.32.1010 (MT_0000000008)", snap.Version)
	}
	if snap.Vendor != "mlx5_core" {
		t.Errorf("vendor = %q, want mlx5_core", snap.Vendor)
	}
}

func TestParseEthtoolIEmpty(t *testing.T) {
	if snap := parseEthtoolI(strings.NewReader("not a valid output"), "eth0"); snap != nil {
		t.Fatalf("expected nil on garbage input, got %+v", snap)
	}
}

const nvmeIDCtrl = `NVME Identify Controller:
vid       : 0x144d
ssvid     : 0x144d
sn        : S5GYNX0R500123X
mn        : Samsung SSD 980 PRO 1TB
fr        : 5B2QGXA7
rab       : 2
`

func TestParseNVMeIDCtrl(t *testing.T) {
	if got := parseNVMeIDCtrl(strings.NewReader(nvmeIDCtrl), "fr"); got != "5B2QGXA7" {
		t.Errorf("fr = %q, want 5B2QGXA7", got)
	}
	if got := parseNVMeIDCtrl(strings.NewReader(nvmeIDCtrl), "mn"); got != "Samsung SSD 980 PRO 1TB" {
		t.Errorf("mn = %q, want Samsung SSD 980 PRO 1TB", got)
	}
	if got := parseNVMeIDCtrl(strings.NewReader(nvmeIDCtrl), "missing"); got != "" {
		t.Errorf("missing key should be empty, got %q", got)
	}
}

const lspciHBA = `0000:01:00.0 Ethernet controller [0200]: Intel Corporation I350 [8086:1521] (rev 01)
	Subsystem: Intel Corporation I350 [8086:0001]
	Kernel driver in use: igb
	Kernel modules: igb

0000:03:00.0 Serial Attached SCSI controller [0107]: Broadcom / LSI SAS3008 PCI-Express Fusion-MPT SAS-3 [1000:0097] (rev 02)
	Subsystem: Broadcom / LSI SAS9300-8i [1000:30e0]
	Kernel driver in use: mpt3sas
	Kernel modules: mpt3sas

0000:04:00.0 RAID bus controller [0104]: LSI MegaRAID SAS-3 3108 [1000:005d] (rev 02)
	Subsystem: LSI MegaRAID SAS 9361-8i [1000:9361]
	Kernel driver in use: megaraid_sas
	Kernel modules: megaraid_sas
`

func TestParseLspciHBA(t *testing.T) {
	got := parseLspciHBA(strings.NewReader(lspciHBA))
	if len(got) != 2 {
		t.Fatalf("got %d HBA snapshots, want 2 (SAS + RAID; Ethernet must be skipped)", len(got))
	}
	for _, s := range got {
		if s.Component != "hba" {
			t.Errorf("component = %q, want hba", s.Component)
		}
		if s.Version != "rev 02" {
			t.Errorf("version = %q, want 'rev 02'", s.Version)
		}
	}
	if got[0].Identifier != "0000:03:00.0" {
		t.Errorf("first identifier = %q, want 0000:03:00.0", got[0].Identifier)
	}
	if got[1].Identifier != "0000:04:00.0" {
		t.Errorf("second identifier = %q, want 0000:04:00.0", got[1].Identifier)
	}
}

const cpuinfo = `processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 85
model name	: Intel(R) Xeon(R) Gold 6230 CPU @ 2.10GHz
stepping	: 7
microcode	: 0x5003006
cpu MHz		: 2100.000
`

func TestParseMicrocode(t *testing.T) {
	snap := parseMicrocode(strings.NewReader(cpuinfo))
	if snap == nil {
		t.Fatal("parseMicrocode returned nil")
	}
	if snap.Version != "0x5003006" {
		t.Errorf("version = %q, want 0x5003006", snap.Version)
	}
	if snap.Vendor != "GenuineIntel" {
		t.Errorf("vendor = %q, want GenuineIntel", snap.Vendor)
	}
	if snap.Identifier != "cpu" {
		t.Errorf("identifier = %q, want cpu", snap.Identifier)
	}
}

func TestParseMicrocodeMissing(t *testing.T) {
	// A /proc/cpuinfo without a microcode line returns nil.
	input := "processor\t: 0\nvendor_id\t: GenuineIntel\n"
	if snap := parseMicrocode(strings.NewReader(input)); snap != nil {
		t.Fatalf("expected nil when microcode line absent, got %+v", snap)
	}
}

func TestIsRealNIC(t *testing.T) {
	cases := []struct {
		name string
		want bool // want=true means a real-looking name (the /sys/class/net/<name>/device check is skipped here)
	}{
		{"lo", false},
		{"", false},
		{"docker0", false},
		{"br-abc", false},
		{"veth1234", false},
		{"virbr0", false},
		{"bond0", false},
		{"tun0", false},
	}
	for _, tc := range cases {
		if got := isRealNIC(tc.name); got != tc.want {
			t.Errorf("isRealNIC(%q) = %v, want %v", tc.name, got, tc.want)
		}
	}
}

// dmidecode -t 39 fixture with two PSU blocks. Verifies that
// parseDmidecodeAllSections returns every matching block, not just the
// first (which was the old parseDmidecodeSection behavior).
const dmidecodePSU = `# dmidecode 3.3

Handle 0x0040, DMI type 39, 22 bytes
System Power Supply
	Location: PSU1
	Manufacturer: DELTA
	Model Part Number: ABC760
	Max Power Capacity: 760 W
	Status: Present, OK

Handle 0x0041, DMI type 39, 22 bytes
System Power Supply
	Location: PSU2
	Manufacturer: DELTA
	Model Part Number: ABC760
	Max Power Capacity: 760 W
	Status: Present, Unplugged
`

func TestParseDmidecodeAllSections(t *testing.T) {
	blocks := parseDmidecodeAllSections(strings.NewReader(dmidecodePSU), "System Power Supply")
	if len(blocks) != 2 {
		t.Fatalf("expected 2 blocks, got %d", len(blocks))
	}
	if blocks[0]["Location"] != "PSU1" || blocks[1]["Location"] != "PSU2" {
		t.Fatalf("locations wrong: %+v", blocks)
	}
	if blocks[1]["Status"] != "Present, Unplugged" {
		t.Fatalf("psu2 status: %q", blocks[1]["Status"])
	}
}

func TestParseDmidecodeAllSectionsEmpty(t *testing.T) {
	blocks := parseDmidecodeAllSections(strings.NewReader(""), "Memory Device")
	if len(blocks) != 0 {
		t.Fatalf("expected 0 blocks on empty input, got %d", len(blocks))
	}
}