package zdaemon

import (
	"fmt"
	"git.swzry.com/zry/pathutils"
	"os"
	"path"
	"text/template"
)

const tpl_systemd = `[Unit]
Description={{.Description}}

[Service]
ExecStart={{.ExecPath}} start
ExecStop={{.ExecPath}} stop

[Install]
WantedBy=multi-user.target
`

func (zd *ZDaemon) install_systemd() {
	if zd.daemonConfig.InstallMode != "free" {
		fmt.Println("Failed install: already installed.")
		return
	}
	initsp := path.Join("/usr/lib/systemd/system/", fmt.Sprintf("%d.service", zd.daemonName))
	pe, _ := pathutils.PathExists(initsp)
	if pe {
		err := os.Remove(initsp)
		if err != nil {
			fmt.Println("Failed install, old file exist and error in deleting old file: ", err.Error())
			return
		}
	}
	otpl := template.New(zd.daemonName)
	tpl, err := otpl.Parse(tpl_systemd)
	if err != nil {
		fmt.Println("Failed install: ", err.Error())
		return
	}
	fids, err := os.OpenFile(initsp, os.O_WRONLY|os.O_CREATE, 0777)
	if err != nil {
		fmt.Println("Failed install: ", err.Error())
		return
	}
	tdat := map[string]string{
		"Description": zd.description,
		"ExecPath":    zd.executableFileName,
	}
	err = tpl.Execute(fids, tdat)
	if err != nil {
		fmt.Println("Failed install: ", err.Error())
		_ = fids.Close()
		return
	}
	_ = fids.Close()
	zd.daemonConfig.InstallMode = "systemd"
	zd.writeStatus()
	fmt.Println("Installed.")
}

func (zd *ZDaemon) uninstall_systemd() {
	initsp := path.Join("/etc/init.d/", zd.daemonName)
	pe, _ := pathutils.PathExists(initsp)
	if pe {
		err := os.Remove(initsp)
		if err != nil {
			fmt.Println("Failed uninstall: ", err.Error())
			return
		}
	}
	zd.daemonConfig.InstallMode = "free"
	zd.writeStatus()
	fmt.Println("Uninstalled.")
}