package slices

import (
	"git.milar.in/milarin/channel"
)

func IndexOf[T comparable](slice []T, value T) int {
	return IndexOfCmp(slice, value, DefaultEqualityComparator[T])
}

func IndexOfCmp[T comparable](slice []T, value T, cmp EqualityComparator[T]) int {
	for i, v := range slice {
		if cmp(v, value) {
			return i
		}
	}
	return -1
}

func Contains[T comparable](slice []T, value T) bool {
	return ContainsCmp(slice, value, DefaultEqualityComparator[T])
}

func ContainsCmp[T comparable](slice []T, value T, cmp EqualityComparator[T]) bool {
	return IndexOfCmp(slice, value, cmp) != -1
}

func Map[I, O any](slice []I, mapper func(I) O) []O {
	ret := make([]O, 0, len(slice))
	for _, v := range slice {
		ret = append(ret, mapper(v))
	}
	return ret
}

func MapParallel[I, O any](slice []I, mapper func(I) O) []O {
	return channel.ToSlice(channel.Map(channel.Of(slice...), mapper))
}

func MapParallelWithRunner[I, O any](slice []I, runner channel.Runner, mapper func(I) O) []O {
	return channel.ToSlice(channel.MapWithRunner(channel.Of(slice...), runner, mapper))
}

func Each[T any](slice []T, f func(T)) {
	EachIndex(slice, func(_ int, v T) { f(v) })
}

func EachIndex[T any](slice []T, f func(int, T)) {
	for i, v := range slice {
		f(i, v)
	}
}