package collector

import "testing"

func TestDmesgSeverity_xidCodes(t *testing.T) {
	tests := []struct {
		name string
		msg  string
		want string
	}{
		{
			name: "xid 64 remap write failure escalates to critical",
			msg:  "NVRM: Xid (PCI:0000:65:00): 64, pid=1234, name=python",
			want: statusCritical,
		},
		{
			name: "xid 94 contained ecc is downgraded to warning",
			msg:  "NVRM: Xid (PCI:0000:65:00): 94, pid=1234, name=python",
			want: statusWarning,
		},
		{
			name: "xid 63 remap committed is downgraded to warning",
			msg:  "NVRM: Xid (PCI:0000:65:00): 63, pid=1234, Class 0x90a0",
			want: statusWarning,
		},
		{
			name: "unrecognized xid code falls back to generic critical",
			msg:  "NVRM: Xid (PCI:0000:65:00): 79, pid=1234, GPU has fallen off the bus",
			want: statusCritical,
		},
		{
			name: "non-xid generic error keyword",
			msg:  "blk_update_request: I/O error, dev sda",
			want: statusCritical,
		},
		{
			name: "disabled by default is not a fault substring match",
			msg:  "Yama: disabled by default; enable with sysctl kernel.yama.*",
			want: statusWarning,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got := dmesgSeverity(tt.msg)
			if got != tt.want {
				t.Fatalf("dmesgSeverity(%q) = %q, want %q", tt.msg, got, tt.want)
			}
		})
	}
}

func TestParseDmesgErrorsSkipsKnownBootNoise(t *testing.T) {
	entries := parseDmesgErrors("[Thu Aug 25 10:00:00 2026] pci 0000:00:02.0: bridge window [mem 0x0000-0x0000] to [bus 01-ff] failed to assign\n" +
		"[Thu Aug 25 10:00:01 2026] NVRM: loading NVIDIA UNIX Open Kernel Module for x86_64\n" +
		"[Thu Aug 25 10:00:02 2026] blk_update_request: I/O error, dev sda\n")
	if len(entries) != 1 || entries[0].Severity == nil || *entries[0].Severity != statusCritical {
		t.Fatalf("entries=%#v, want one critical real error", entries)
	}
}