//go:build linux

package service

import (
	"strings"
	"testing"

	"mfd-monitor-agent/internal/config"
)

// TestRenderSystemdUnitIncludesConfigPath verifies install preserves the config flag.
func TestRenderSystemdUnitIncludesConfigPath(t *testing.T) {
	cfg := config.Default()
	cfg.Service.Description = "MFD Agent"

	unit := renderSystemdUnit("/opt/agent", "/etc/mfd-agent.json", cfg)

	if !strings.Contains(unit, "ExecStart=/opt/agent run -config /etc/mfd-agent.json") {
		t.Fatalf("unit missing config path:\n%s", unit)
	}
}

// TestLinuxInstallRequiresRoot verifies Linux install rejects non-root callers.
func TestLinuxInstallRequiresRoot(t *testing.T) {
	oldUID := currentUID
	t.Cleanup(func() { currentUID = oldUID })
	currentUID = func() int { return 1000 }

	err := linuxManager{}.Install("/opt/agent", config.Default(), InstallOptions{})
	if err == nil {
		t.Fatal("expected root requirement error")
	}
	if !strings.Contains(err.Error(), "root") {
		t.Fatalf("error = %v", err)
	}
}