package main

import (
	"fmt"
	"io/fs"
	"log"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
)

var (
	basePath, _ = os.Getwd()
	protoFolder = filepath.Join(basePath, "protodef", "src")
	protocPath  = filepath.Join(basePath, "protodef", "protoc-23.1", "bin", "win64", "protoc")
)
var goOutDir string = "./"

func main() {
	//先安装以下插件
	//go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
	args := os.Args
	if len(args) < 3 {
		log.Fatal("usage: go run protodef/main.go [path/to/proto/dir] [goOutDir]")
	}
	protoFolder = filepath.Join(basePath, args[1])
	goOutDir = args[2]

	log.Println(protoFolder, goOutDir)
	// if len(args) >= 2 {
	// 	switch {
	// 	case args[1] == "component": //go run . component  编译组件proto
	// 		{
	// 			protocPath = filepath.Join(basePath, "protoc-23.1", "bin", "win64", "protoc")
	// 			protoFolder = filepath.Join(basePath, "src", args[1])
	// 			goOutDir = "../"
	// 		}
	// 	}
	// }
	//
	// protoFolder = filepath.Join(basePath)
	protoFiles := getProtoFiles()
	log.Println(protoFiles)
	// 编译proto文件为Go文件
	if err := compileProto(protoFiles); err != nil {
		log.Fatalf("编译proto文件失败：%v", err)
	}
}

// 获取指定文件夹下的所有proto文件的绝对路径
func getProtoFiles() []string {
	var protoFiles []string
	err := filepath.WalkDir(protoFolder, func(path string, d fs.DirEntry, err error) error {
		if !d.IsDir() && strings.HasSuffix(path, ".proto") {
			protoFiles = append(protoFiles, path)
		}
		return err
	})
	if err != nil {
		log.Fatal("获取proto文件列表失败:", err)
	}
	return protoFiles
}

// 编译proto文件为Go文件
func compileProto(protoFiles []string) error {
	for _, fileName := range protoFiles {
		cmd := exec.Command(protocPath, "-I="+protoFolder, fmt.Sprintf("--go_out=%s", goOutDir), "--go_opt=paths=source_relative", fileName)
		fmt.Println(cmd.String())
		cmd.Stdout = os.Stdout
		cmd.Stderr = os.Stderr
		if err := cmd.Run(); err != nil {
			return err
		}
	}
	return nil
}