package data

import "strings"

// LanguageByAliasMap keeps alias for different languages and use the name of the languages as an alias too.
// All the keys (alias or not) are written in lower case and the whitespaces has been replaced by underscores.
var LanguageByAliasMap = map[string]string{
	{{range $alias, $language := . -}}
		"{{ $alias }}":	{{ printf "%q" $language -}},
	{{end -}}
}

// LanguageByAlias looks up the language name by it's alias or name.
// It mirrors the logic of github linguist and is needed e.g for heuristcs.yml
// that mixes names and aliases in a language field (see XPM example).
func LanguageByAlias(langOrAlias string) (lang string, ok bool) {
	k := convertToAliasKey(langOrAlias)
	lang, ok = LanguageByAliasMap[k]
	return
}


// convertToAliasKey converts language name to a key in LanguageByAliasMap.
// Following
//  - internal.code-generator.generator.convertToAliasKey()
//  - GetLanguageByAlias()
// conventions.
// It is here to avoid dependency on "generate" and "enry" packages.
func convertToAliasKey(langName string) string {
	ak := strings.SplitN(langName, `,`, 2)[0]
	ak = strings.Replace(ak, ` `, `_`, -1)
	ak = strings.ToLower(ak)
	return ak
}