package main

import (

	"fmt"

	"io/ioutil"

	"os"

	"github.com/alecthomas/chroma/v2/formatters"

	"github.com/alecthomas/chroma/v2/lexers"

	"github.com/alecthomas/chroma/v2/styles"

	"gopkg.in/alecthomas/kingpin.v3-unstable"

)

var (

	filesArgs = kingpin.Arg("file", "Files to use to exercise lexers.").Required().ExistingFiles()

)

func main() {

	kingpin.CommandLine.Help = "Exercise linters against a list of files."

	kingpin.Parse()

	for _, file := range *filesArgs {

		lexer := lexers.Match(file)

		if lexer == nil {

			fmt.Printf("warning: could not find lexer for %q\n", file)

			continue

		}

		fmt.Printf("%s: ", file)

		os.Stdout.Sync()

		text, err := ioutil.ReadFile(file)

		kingpin.FatalIfError(err, "")

		it, err := lexer.Tokenise(nil, string(text))

		kingpin.FatalIfError(err, "%s failed to tokenise %q", lexer.Config().Name, file)

		err = formatters.NoOp.Format(ioutil.Discard, styles.SwapOff, it)

		kingpin.FatalIfError(err, "%s failed to format %q", lexer.Config().Name, file)

		fmt.Printf("ok\n")

	}

}