//go:build windows

package notify

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

// PowerShellToast raises a Windows toast notification by invoking
// PowerShell with an AppId-tagged script — the same mechanism go-toast
// uses, without the dependency.
type PowerShellToast struct {
	AppID string
}

// Platform returns the PowerShell toast sender on Windows.
func Platform() Sender { return PowerShellToast{AppID: "agent-lib"} }

var toastScript = `$app = '%[1]s'
[Windows.UI.Notifications.ToastNotificationManager, Windows.UI.Notifications, ContentType = WindowsRuntime] | Out-Null
$tmpl = [Windows.UI.Notifications.ToastNotificationManager]::GetTemplateContent([Windows.UI.Notifications.ToastTemplateType]::ToastText02)
$txt = $tmpl.GetElementsByTagName('text')
$txt.Item(0).AppendChild($tmpl.CreateTextNode('%[2]s')) | Out-Null
$txt.Item(1).AppendChild($tmpl.CreateTextNode('%[3]s')) | Out-Null
$toast = [Windows.UI.Notifications.ToastNotification]::new($tmpl)
[Windows.UI.Notifications.ToastNotificationManager]::CreateToastNotifier($app).Show($toast)`

// Send fires one toast. It requires an interactive user session; callers
// must treat errors as non-fatal.
func (p PowerShellToast) Send(title, body string) error {
	appID := p.AppID
	if appID == "" {
		appID = "agent-lib"
	}
	script := fmt.Sprintf(toastScript, escape(appID), escape(title), escape(body))
	cmd := exec.Command("powershell", "-NoProfile", "-NonInteractive", "-Command", script)
	if out, err := cmd.CombinedOutput(); err != nil {
		return fmt.Errorf("toast failed: %v: %s", err, strings.TrimSpace(string(out)))
	}
	return nil
}

// escape makes s safe inside a PowerShell single-quoted string.
func escape(s string) string {
	r := strings.NewReplacer("'", "''", "\n", " ", "\r", " ")
	return r.Replace(s)
}