//go:build windows
// +build windows

package staros

import (
	"errors"
	"syscall"
	"testing"

	"b612.me/win32api"
)

func TestWindowsNetConnectionTypes(t *testing.T) {
	tcp, udp, err := windowsNetConnectionTypes("")
	if err != nil {
		t.Fatal(err)
	}
	if !tcp || !udp {
		t.Fatalf("empty types should request tcp and udp, got tcp=%v udp=%v", tcp, udp)
	}

	tcp, udp, err = windowsNetConnectionTypes("all")
	if err != nil {
		t.Fatal(err)
	}
	if !tcp || !udp {
		t.Fatalf("all types should request tcp and udp, got tcp=%v udp=%v", tcp, udp)
	}

	tcp, udp, err = windowsNetConnectionTypes("tcp")
	if err != nil {
		t.Fatal(err)
	}
	if !tcp || udp {
		t.Fatalf("tcp types mismatch: tcp=%v udp=%v", tcp, udp)
	}

	tcp, udp, err = windowsNetConnectionTypes("TCP,UDP")
	if err != nil {
		t.Fatal(err)
	}
	if !tcp || !udp {
		t.Fatalf("mixed tcp/udp types mismatch: tcp=%v udp=%v", tcp, udp)
	}

	tcp, udp, err = windowsNetConnectionTypes("udp")
	if err != nil {
		t.Fatal(err)
	}
	if tcp || !udp {
		t.Fatalf("udp types mismatch: tcp=%v udp=%v", tcp, udp)
	}

	if _, _, err = windowsNetConnectionTypes("unix"); !errors.Is(err, ERR_UNSUPPORTED) {
		t.Fatalf("unix should be unsupported on windows, got %v", err)
	}
	if _, _, err = windowsNetConnectionTypes("tcp,unix"); !errors.Is(err, ERR_UNSUPPORTED) {
		t.Fatalf("mixed unix request should be unsupported on windows, got %v", err)
	}
	if _, _, err = windowsNetConnectionTypes("all,unix"); !errors.Is(err, ERR_UNSUPPORTED) {
		t.Fatalf("all plus unix request should be unsupported on windows, got %v", err)
	}
	if _, _, err = windowsNetConnectionTypes("raw"); err == nil {
		t.Fatal("unknown type should return error")
	}
}

func TestWindowsIPv4FromDWORD(t *testing.T) {
	if got := windowsIPv4FromDWORD(0x0100007f); got != "127.0.0.1" {
		t.Fatalf("unexpected localhost conversion: %s", got)
	}
}

func TestWindowsTCPState(t *testing.T) {
	cases := map[win32api.MIB_TCP_STATE]string{
		win32api.MIB_TCP_STATE_ESTAB:      TCP_STATE[TCP_ESTABLISHED],
		win32api.MIB_TCP_STATE_LISTEN:     TCP_STATE[TCP_LISTEN],
		win32api.MIB_TCP_STATE_SYN_SENT:   TCP_STATE[TCP_SYN_SENT],
		win32api.MIB_TCP_STATE_SYN_RCVD:   TCP_STATE[TCP_SYN_RECV],
		win32api.MIB_TCP_STATE_FIN_WAIT1:  TCP_STATE[TCP_FIN_WAIT1],
		win32api.MIB_TCP_STATE_FIN_WAIT2:  TCP_STATE[TCP_FIN_WAIT2],
		win32api.MIB_TCP_STATE_TIME_WAIT:  TCP_STATE[TCP_TIME_WAIT],
		win32api.MIB_TCP_STATE_CLOSED:     TCP_STATE[TCP_CLOSE],
		win32api.MIB_TCP_STATE_CLOSE_WAIT: TCP_STATE[TCP_CLOSE_WAIT],
		win32api.MIB_TCP_STATE_LAST_ACK:   TCP_STATE[TCP_LAST_ACK],
		win32api.MIB_TCP_STATE_CLOSING:    TCP_STATE[TCP_CLOSING],
	}
	for state, want := range cases {
		if got := windowsTCPState(state); got != want {
			t.Fatalf("state %d mismatch: got=%s want=%s", state, got, want)
		}
	}
	if got := windowsTCPState(win32api.MIB_TCP_STATE(0)); got != TCP_STATE[TCP_UNKNOWN] {
		t.Fatalf("unknown state mismatch: %s", got)
	}
}

func TestIsOptionalWindowsNetTableError(t *testing.T) {
	if !isOptionalWindowsNetTableError(windowsErrorNotSupported) {
		t.Fatal("ERROR_NOT_SUPPORTED should be optional")
	}
	if isOptionalWindowsNetTableError(syscall.EINVAL) {
		t.Fatal("EINVAL should not be optional")
	}
}

func TestAttachWindowsProcess(t *testing.T) {
	conn := NetConn{}
	cache := map[int64]*Process{}
	attachWindowsProcess(&conn, 123, false, cache)
	if conn.Pid != 0 || conn.Process != nil {
		t.Fatalf("analysePid=false should not populate process fields: %#v", conn)
	}

	conn = NetConn{}
	attachWindowsProcess(&conn, 0, true, cache)
	if conn.Pid != 0 || conn.Process != nil {
		t.Fatalf("pid 0 should not populate process fields: %#v", conn)
	}
}