package badtudexo

import (
	st "saggytrousers"
)

type MissingValue[T any] struct {
	Value	T
	Index	int
}

func MissingValueNew[T any](value T, index int) MissingValue[T] {
	return MissingValue[T]{ value, index }
}

// Iterates through `check`, and returns all that are _not_ present in `src`, returning both the index in the array, and the value itself.
func Missing[T comparable](check, src []T) []MissingValue[T] {
	var missing []MissingValue[T]
	for i, v := range check {
		if !st.InSlice(src, v) {
			mv := MissingValueNew(v, i)
			missing = append(missing, mv)
		}
	}

	return missing
}

// Iterates through `src`, and returns whether all are present in `check`.
func Present[T comparable](check, src []T) bool {
	for _, v := range src {
		if !st.InSlice(check, v) {
			return false
		}
	}
	return true
}