package gopp

import (
	//"github.com/d5/tengo/v2"
	"surdeus.su/core/xgo/v2/stdlib"
	"surdeus.su/core/cli/mtool"
	//"fmt"
	"os"
	"log"
	"path/filepath"
	"context"
)

var Tool = mtool.T("gopp").Func(func(flags *mtool.Flags){
	var (
		modDir string
		render bool
	)

	log.SetFlags(0)
	flags.StringVar(
		&modDir,
		"mod",
		".",
		"set the import directory",
	)

	flags.BoolVar(
		&render,
		"render",
		false,
		"render to xgo instead of preprocessing",
	)

	filePaths := flags.Parse()

	x := NewXGo().SetPreCompile(func(
		ctx context.Context, s *Script,
	){
		s.SetImports(stdlib.GetModuleMap(
			stdlib.AllModuleNames()...,
		))
		s.EnableFileImport(true)
		s.SetImportDir(modDir)
	})

	ctx := context.Background()

	pp := New(x)
	for _, filePath := range filePaths {
		pth := filepath.FromSlash(filePath)
		file, err := os.Open(pth)
		if err != nil {
			log.Printf("os.Open(%s): %s\n", pth, err)
			continue
		}
		if render {
			err := pp.Render(ctx, file, os.Stdout)
			if err != nil {
				log.Printf("pp.Render(...): %s\n", err)
			}
			continue
		}
		compiled, err := pp.Compile(context.Background(), file)
		if err != nil {
			log.Printf("pp.Compile(...): %s\n", err)
			continue
		}
		err = pp.XGo().RunContext(
			context.Background(),
			compiled.Clone(),
			pth, os.Stdout,
		)
		if err != nil {
			log.Printf("pp.Xgo().RunContext(...): %s", err)
			continue
		}
	}
}).Usage("[files]")