package main

import (
	"fmt"

	"github.com/golangci/golines/shorten"
)

func formatSource(source string, maxLen int) (output []byte, err error) {
	// Dependency panics must not escape the JS callback and terminate the WASM runtime.
	defer func() {
		if recovered := recover(); recovered != nil {
			output = nil
			err = fmt.Errorf("golines could not format this input (internal panic: %v). Ensure the input is a complete Go file, including a package declaration", recovered)
		}
	}()

	tabLen := 4
	if maxLen < 80 {
		tabLen = 2
	}
	return shorten.NewShortener(&shorten.Config{
		MaxLen:          maxLen,
		TabLen:          tabLen,
		ShortenComments: true,
		ReformatTags:    true,
		ChainSplitDots:  true,
	}).Process([]byte(source))
}