package saggytrousers

import (
	"strings"
)

// For Locate, LocateExact
func preprocess(s string) string {
	s = strings.ToLower(s)
	s = strings.ReplaceAll(s, " ", "")
	s = strings.ReplaceAll(s, "-", "")

	return s
}

// This function is needed for SelectHeader. So we put it in saggytrousers, and 
// the badtudexo.Locate function calls this. 
// For all other types, including []any, please call LocateExact.
func Locate(header []string, needle string) int {
	// Perform preprocessing of header and needle
	var cneedle string
	var cheader []string
	
	cneedle = preprocess(needle) 

	for _, v := range header {
		cheader = append(cheader, preprocess(v))
	}

	return LocateExact(cheader, cneedle)
}

// Returns the index where the needle is found, returns -1 if not found; 
// matches exactly.
func LocateExact[T comparable](header []T, needle T) int {
	for i := 0; i < len(header); i++ {
		if header[i] == needle {
			return i
		}
	}
	return -1
}