package tool

import (
	"fmt"
	"go/types"
	"os"
	"path/filepath"
	"strings"

	"golang.org/x/tools/go/packages"
)

func main() {
	pwd, err := os.Getwd()
	if err != nil {
		fmt.Println("无法获取当前工作目录")
		panic(err)
	}
	sep := string(filepath.Separator)
	s := strings.Split(pwd, sep)
	var project string
	for i := len(s); i > 0; i-- {
		base := strings.Join(s[:i], sep)
		module := filepath.Join(base, "go.mod")
		_, err := os.Stat(module)
		if err == nil {
			project = module
			break
		}
	}
	if project == "" {
		panic("没有找到 go.mod ，请检查是否在 module 中调用程序")
	}
	project = filepath.Dir(project)
	fmt.Println("当前寻根目录 " + project)
	pkgs, err := packages.Load(&packages.Config{
		Mode:  packages.NeedName | packages.NeedTypes | packages.NeedTypesInfo | packages.NeedSyntax | packages.NeedDeps,
		Tests: false,
	}, filepath.Join(project, "..."))
	if err != nil {
		fmt.Println("解析项目失败")
		panic(err)
	}
	for _, pkg := range pkgs {
		top := pkg.Types.Scope()
		funcs := []*types.Func{}
		for _, name := range top.Names() {
			obj := top.Lookup(name)
			if !strings.HasSuffix(obj.Name(), "Provider") {
				continue
			}
			fun, ok := obj.(*types.Func)
			if ok {
				funcs = append(funcs, fun)
			}
		}
		fmt.Println(pkg.Name)
	}
}