//go:build windows

package main

import (
	"errors"
	"fmt"
	"os"
	"path/filepath"
	"strings"

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

var keyPath = `Software\Microsoft\Windows\CurrentVersion\Run`

func setAutoStart(appName string, exePath string) error {
	// 当前用户注册表 CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
	key, _, err := registry.CreateKey(registry.CURRENT_USER, keyPath, registry.ALL_ACCESS)
	if err != nil {
		if errors.Is(err, windows.ERROR_ACCESS_DENIED) {
			return err
		}
		return fmt.Errorf("无法打开注册表键: %v", err)
	}
	defer key.Close()

	absPath, err := filepath.Abs(exePath)
	if err != nil {
		return fmt.Errorf("获取绝对路径失败: %v", err)
	}

	args := getArgs()

	err = key.SetStringValue(appName, fmt.Sprintf(`"%s" %s`, absPath, args))
	if err != nil {
		return fmt.Errorf("写入注册表失败: %v", err)
	}

	return nil
}

func removeAutoStart(appName string) error {
	key, err := registry.OpenKey(registry.CURRENT_USER, keyPath, registry.ALL_ACCESS)
	if err != nil {
		if errors.Is(err, windows.ERROR_ACCESS_DENIED) {
			return err
		}
		return fmt.Errorf("无法打开注册表键: %v", err)
	}
	defer key.Close()

	err = key.DeleteValue(appName)
	if err != nil {
		return fmt.Errorf("删除注册表项失败: %v", err)
	}

	return nil
}

func isInRegistry(appName string) (bool, error) {
	userKey, err := registry.OpenKey(registry.CURRENT_USER, keyPath, registry.QUERY_VALUE)
	if err == nil {
		defer userKey.Close()
		_, _, err := userKey.GetStringValue(appName)
		if err == nil {
			return true, nil
		}
	}

	return false, nil
}

func isAutoStartEnabled(appName string) bool {
	reg, _ := isInRegistry(appName)
	return reg
}

func getArgs() string {
	var argsBuilder strings.Builder
	for _, arg := range os.Args[1:] {
		if strings.ContainsAny(arg, " \t") {
			argsBuilder.WriteString(fmt.Sprintf(`"%s" `, arg))
		} else {
			argsBuilder.WriteString(arg + " ")
		}
	}
	return strings.TrimSpace(argsBuilder.String())
}