package skate

import (
	"regexp"
)

var (
	patNonWordDomain       = regexp.MustCompile(`(https?:\/\/)([^\w]*)(.*)`)
	patRepeatedHttpSlashes = regexp.MustCompile(`(https?:\/\/)(\/)*(.*)`)
	patHttpDOI             = regexp.MustCompile(`(https?:\/\/)(10[.][0-9]{1,8}\/.*)`)
	patAccessedOn          = regexp.MustCompile(`(?iU)(.*)[.;]?(abgerufen|adresinden|sayfasındanulaşıl|accessedon|consultéle|consultad|diaksestanggal|diaksespadatanggal|lastaccessed|acesso|accessoem|accessed).*$`)
	patFileExtraSuffix     = regexp.MustCompile(`(http.*[.](zip|pdf|html|doc|docx|rar))(.*)$`)
)

// SanitizeURL applies various cleanup rules on URLs as found in references.
func SanitizeURL(s string) string {
	// http://!!!:
	// http://!
	// http://"
	s = patNonWordDomain.ReplaceAllString(s, `$1$3`)

	// http:///en.m.wikipedia.org/ChenLong
	s = patRepeatedHttpSlashes.ReplaceAllString(s, `$1$3`)

	// http://10.1113/jphysiol.2002.026047
	s = patHttpDOI.ReplaceAllString(s, `https://doi.org/$2`)

	// http://10.3386/w20634https://doi.org/10.3386/w20634

	// .diaksestanggal27-03-2017.10.30Wib
	// accessedon15
	// .Accessed
	// Acessoem:10/09/2012
	// .Acesso:11Abr
	if patAccessedOn.MatchString(s) {
		s = patAccessedOn.ReplaceAllString(s, `$1`)
	}

	// http://140.120.197.173/Ecology/Download/Timing-MSChart.zipJournalofInsectScience
	if patFileExtraSuffix.MatchString(s) {
		s = patFileExtraSuffix.ReplaceAllString(s, `$1`)
	}

	return s
}