package main

import (
	_ "embed"
	"fmt"
	"os"
	"path/filepath"
	"text/template"
)

var fns = template.FuncMap{
	"plus1": func(x int) int {
		return x + 1
	},
}

//go:embed function.tmpl
var templatestr string

var functionTemplate *template.Template

func init() {
	var err error
	functionTemplate, err = template.New("class").Funcs(fns).Parse(templatestr)
	if err != nil {
		Error.Printf("Error parsing template: %v", err)
		return
	}
}

type (
	Function struct {
		Name        string
		Description string
		Arguments   []Parameter
		Returns     []Parameter
	}
	Parameter struct {
		Name        string
		Type        string
		Description string
	}
)

func (f *Function) ResolveFileName() string {
	return f.Name + ".lua"
}
func (f *Function) WriteFile(root string) error {
	if f.Name == "" {
		return fmt.Errorf("function name is empty of %+v", f)
	}

	file, err := os.Create(filepath.Join(root, f.ResolveFileName()))
	if err != nil {
		return err
	}
	defer file.Close()

	err = functionTemplate.Execute(file, f)
	if err != nil {
		return err
	}
	return nil
}