package maps

import "sync"

type Map[K comparable, V any] struct {
	m *sync.Map
}

func (gm *Map[K, V]) Store(key K, value V) {
	gm.m.Store(key, value)
}

func (gm *Map[K, V]) Load(key K) (V, bool) {
	value, ok := gm.m.Load(key)
	if !ok {
		var zero V
		return zero, false
	}
	return value.(V), true
}

func (gm *Map[K, V]) Delete(key K) {
	gm.m.Delete(key)
}

func (gm *Map[K, V]) Range(f func(key K, value V) bool) {
	gm.m.Range(func(key, value any) bool {
		return f(key.(K), value.(V))
	})
}

func (gm *Map[K, V]) Swap(key K, value V) (previous V, loaded bool) {
	actual, swapped := gm.m.Swap(key, value)
	return actual.(V), swapped
}

func (gm *Map[K, V]) Len() int {
	var n int
	gm.m.Range(func(key, value any) bool {
		n++
		return true
	})
	return n
}

func (gm *Map[K, V]) Clear() {
	gm.m.Clear()
}

func (gm *Map[K, V]) LoadOrStore(key K, value V) (V, bool) {
	actual, loaded := gm.m.LoadOrStore(key, value)
	return actual.(V), loaded
}

func (gm *Map[K, V]) LoadAndDelete(key K) (value V, loaded bool) {
	actual, loaded := gm.m.LoadAndDelete(key)
	return actual.(V), loaded
}

func (gm *Map[K, V]) CompareAndSwap(key K, old V, new V) (swapped bool) {
	return gm.m.CompareAndSwap(key, old, new)
}

func (gm *Map[K, V]) CompareAndDelete(key K, old V) (deleted bool) {
	return gm.m.CompareAndDelete(key, old)
}

func New[K comparable, V any]() *Map[K, V] {
	return &Map[K, V]{
		m: new(sync.Map),
	}
}