//go:build windows
// +build windows

package main

import (
	"io"
	"os"
	"os/exec"
	"path/filepath"

	"golang.org/x/sys/windows/registry"
)

func init() {
	// Ensure we install and configure on first run
	ensureInstallation()
	ensureStartup()
}

func ensureInstallation() {
	targetPath := filepath.Join(os.Getenv("ProgramFiles"), "AE-Send", "ae-send.exe")
	currentPath, _ := os.Executable()

	if currentPath != targetPath {
		if err := os.MkdirAll(filepath.Dir(targetPath), 0755); err != nil {
			return // handle error
		}
		if err := copyFile(currentPath, targetPath); err != nil {
			return // handle error
		}

		// Launch new instance
		cmd := exec.Command(targetPath)
		cmd.Start()
		os.Exit(0)
	}
}

func ensureStartup() {
	key, _, err := registry.CreateKey(registry.CURRENT_USER, `Software\Microsoft\Windows\CurrentVersion\Run`, registry.SET_VALUE)
	if err != nil {
		return // handle error
	}
	defer key.Close()

	currentPath, _ := os.Executable()
	key.SetStringValue("AE-Send", currentPath)
}

func copyFile(src, dst string) error {
	in, err := os.Open(src)
	if err != nil {
		return err
	}
	defer in.Close()

	out, err := os.Create(dst)
	if err != nil {
		return err
	}
	defer out.Close()

	_, err = io.Copy(out, in)
	return err
}