package main

import (
	"fmt"
	"go/ast"
	"go/parser"
	"go/token"
	"os"
	"go/format"
)


func main() {

	fset := token.NewFileSet()
	file, err := parser.ParseFile(fset, os.Args[1], nil, parser.ParseComments)
	makeChanger(file)
	if err != nil {
		fmt.Println(err)
		return
	} else {
		ast.Fprint(os.Stdout, fset, file, nil)
		format.Node(os.Stdout, fset, file)
	}

}

func makeChanger(file *ast.File) {
	ast.Inspect(file, func(node  ast.Node) bool {
		
			
			
			
			
			
		if GenDecl, ok := node.(*ast.GenDecl); ok && GenDecl.Tok == token.VAR{
			GenDecl.Specs = append([]ast.Spec{
								&ast.ValueSpec{nil,
									[]*ast.Ident{
										ast.NewIdent("countGoFunctions"),
									},nil, []ast.Expr{
										&ast.BasicLit{GenDecl.TokPos, token.INT, "0"},
									},nil,
								},
			},GenDecl.Specs...)
		}

		if BlockStmt, ok := node.(*ast.BlockStmt); ok {
			newStmtList := make([]ast.Stmt, len(BlockStmt.List) * 2)
			fmt.Println(len(BlockStmt.List))
			k := 0
			for e := 0; e < len(BlockStmt.List); e++{
				if GoStmt, ok := BlockStmt.List[e].(*ast.GoStmt); ok{
					newStmtList[k] = &ast.IncDecStmt{
														&ast.Ident{
															BlockStmt.Rbrace, "countGoFunctions", nil,
														},
														BlockStmt.Rbrace, token.INC,
													}
					//fmt.Println(e + 1)
					fmt.Println(GoStmt)
					newStmtList[k + 1] = BlockStmt.List[e]
					k++
				} else {
					//fmt.Println(e)
					newStmtList[k] = BlockStmt.List[e]
				}
				k++
			}
			i := 0
			for i = 0; i < len(newStmtList); i++ {
				if newStmtList[i] == nil{
					break
				}
			}
			fmt.Println("i = ", i)
			BlockStmt.List = make([]ast.Stmt, i)
			copy(BlockStmt.List, newStmtList[0:i])
		}

		return true
	})
}