package constants

import (
	"fmt"
	"os"
	"path/filepath"
	"runtime"
)

const (
	// Windows 系统环境变量路径
	ENV_SYSTEM_PATH = `SYSTEM\CurrentControlSet\Control\Session Manager\Environment`
	ENV_USER_PATH   = `Environment`

	// 默认配置路径
	DEFAULT_CONFIG_FILE = "config.json"
	DEFAULT_FOLDER      = ".sdks"
	DEFAULT_BACKUP_FILE = "backup.json"

	// sdk type
	JAVA_SDK   = "java"
	MAVEN_SDK  = "maven"
	NODE_SDK   = "node"
	GO_SDK     = "go"
	PYTHON_SDK = "python"
	PHP_SDK    = "php"
)

var (
	SdkType     = JAVA_SDK
	SymlinkPath = ""

	Sdks = map[string]SdkInfo{
		JAVA_SDK:   {Name: JAVA_SDK, Home: "JAVA_HOME", ExecName: map[string][]string{"windows": {filepath.Join("bin", "javac.exe")}, "linux": {filepath.Join("bin", "javac")}, "darwin": {filepath.Join("bin", "javac")}}},
		MAVEN_SDK:  {Name: MAVEN_SDK, Home: "MAVEN_HOME", ExecName: map[string][]string{"windows": {filepath.Join("bin", "mvn.cmd"), filepath.Join("bin", "mvnd.cmd")}, "linux": {filepath.Join("bin", "mvn"), filepath.Join("bin", "mvnd")}, "darwin": {filepath.Join("bin", "mvn"), filepath.Join("bin", "mvnd")}}},
		NODE_SDK:   {Name: NODE_SDK, Home: "NODE_HOME", ExecName: map[string][]string{"windows": {filepath.Join("node.exe")}, "linux": {filepath.Join("bin", "node")}, "darwin": {filepath.Join("bin", "node")}}},
		GO_SDK:     {Name: GO_SDK, Home: "GO_HOME", ExecName: map[string][]string{"windows": {filepath.Join("bin", "go.exe")}, "linux": {filepath.Join("bin", "go")}, "darwin": {filepath.Join("bin", "go")}}},
		PYTHON_SDK: {Name: PYTHON_SDK, Home: "PYTHON_HOME", ExecName: map[string][]string{"windows": {filepath.Join("python.exe")}, "linux": {filepath.Join("python")}, "darwin": {filepath.Join("python")}}},
		PHP_SDK:    {Name: PHP_SDK, Home: "PHP_HOME", ExecName: map[string][]string{"windows": {filepath.Join("php.exe")}, "linux": {filepath.Join("php")}, "darwin": {filepath.Join("php")}}},
	}
)

func CheckSdkType(sdkType string) bool {
	_, ok := Sdks[sdkType]
	return ok
}

func GetDefaultSymlinkPath(sdkType string) string {
	dir, err := os.UserHomeDir()
	if err != nil {
		fmt.Println("error 无法获取用户目录:", err)
		return ""
	}
	join := filepath.Join(dir, DEFAULT_FOLDER, sdkType, sdkType+"_home")
	_, err = os.Stat(join)
	if os.IsNotExist(err) {
		os.MkdirAll(join, 0755)
	}
	return join
}

func GetEnvHome(sdkType string) string {
	return Sdks[sdkType].Home
}

func GetDefaultEnvHome(sdkType string) string {
	if runtime.GOOS == "windows" {
		if sdkType == NODE_SDK || sdkType == PYTHON_SDK || sdkType == PHP_SDK {
			return SymlinkPath
		}
	}
	return filepath.Join(SymlinkPath, "bin")
}

func GetSDKName(sdkType string) string {
	return Sdks[sdkType].Name
}

type SdkInfo struct {
	Name     string
	Home     string
	ExecName map[string][]string
}