package windowsservice

import (
	"errors"
	"testing"
)

func TestInstallSpecValidation_HP_WINSVC_01(t *testing.T) {
	t.Parallel()
	valid := InstallSpec{ExecutablePath: `C:\Program Files\RVBox\rvbox.exe`, ConfigPath: `C:\ProgramData\RVBox\client.toml`, Startup: StartupAutomatic}
	if err := valid.Validate(); err != nil {
		t.Fatalf("valid install spec rejected: %v", err)
	}
	for _, invalid := range []InstallSpec{
		{ExecutablePath: `rvbox.exe`, ConfigPath: valid.ConfigPath, Startup: StartupAutomatic},
		{ExecutablePath: valid.ExecutablePath, ConfigPath: `client.toml`, Startup: StartupAutomatic},
		{ExecutablePath: valid.ExecutablePath, ConfigPath: valid.ConfigPath, Startup: StartupMode("disabled")},
	} {
		if !errors.Is(invalid.Validate(), ErrInvalidInstallSpec) {
			t.Fatalf("invalid install spec accepted: %#v", invalid)
		}
	}
}

func TestServiceTransitionsAreIdempotentAndExplicit_HP_WINSVC_02(t *testing.T) {
	t.Parallel()
	tests := []struct {
		state   State
		command Command
		want    State
	}{
		{StateStopped, CommandStart, StateStartPending},
		{StateStartPending, CommandStart, StateStartPending},
		{StateRunning, CommandStop, StateStopPending},
		{StateStopPending, CommandStop, StateStopPending},
		{StateStopped, CommandRestart, StateStartPending},
		{StateRunning, CommandRestart, StateStopPending},
	}
	for _, test := range tests {
		got, err := Transition(test.state, test.command)
		if err != nil || got != test.want {
			t.Errorf("Transition(%v,%v) = %v,%v; want %v,nil", test.state, test.command, got, err, test.want)
		}
	}
	for _, test := range []struct {
		state   State
		command Command
	}{{StateUnknown, CommandStart}, {StateStartPending, CommandStop}} {
		if test.state == StateStopped && test.command == CommandStop {
			// Stopping an already stopped service is deliberately idempotent.
			continue
		}
		if _, err := Transition(test.state, test.command); test.state == StateStopped && test.command == CommandStop {
			t.Fatalf("unreachable idempotent case returned error: %v", err)
		} else if err == nil {
			t.Errorf("Transition(%v,%v) unexpectedly accepted", test.state, test.command)
		}
	}
}