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import { source, set } from '../internal/client/reactivity/sources.js';
import { get } from '../internal/client/runtime.js';
import { map } from './utils.js';
var read_methods = ['forEach', 'isDisjointFrom', 'isSubsetOf', 'isSupersetOf'];
var set_like_methods = ['difference', 'intersection', 'symmetricDifference', 'union'];
var inited = false;
/**
* @template T
* @extends {Set<T>}
*/
export class ReactiveSet extends Set {
/** @type {Map<T, import('#client').Source<boolean>>} */
#sources = new Map();
#version = source(0);
#size = source(0);
/**
* @param {Iterable<T> | null | undefined} [value]
*/
constructor(value) {
super();
// If the value is invalid then the native exception will fire here
if (DEV) new Set(value);
if (value) {
var sources = this.#sources;
for (var element of value) {
sources.set(element, source(true));
}
this.#size.v = sources.size;
}
if (!inited) this.#init();
}
// We init as part of the first instance so that we can treeshake this class
#init() {
inited = true;
var proto = ReactiveSet.prototype;
var set_proto = Set.prototype;
for (const method of read_methods) {
// @ts-ignore
proto[method] = function (...v) {
get(this.#version);
// We don't populate the underlying Set, so we need to create a clone using
// our internal values and then pass that to the method.
var clone = new Set(this.values());
// @ts-ignore
return set_proto[method].apply(clone, v);
};
}
for (const method of set_like_methods) {
// @ts-ignore
proto[method] = function (...v) {
get(this.#version);
// We don't populate the underlying Set, so we need to create a clone using
// our internal values and then pass that to the method.
var clone = new Set(this.values());
// @ts-ignore
var set = /** @type {Set<T>} */ (set_proto[method].apply(clone, v));
return new ReactiveSet(set);
};
}
}
#increment_version() {
set(this.#version, this.#version.v + 1);
}
/** @param {T} value */
has(value) {
var s = this.#sources.get(value);
if (s === undefined) {
// We should always track the version in case
// the Set ever gets this value in the future.
get(this.#version);
return false;
}
return get(s);
}
/** @param {T} value */
add(value) {
var sources = this.#sources;
if (!sources.has(value)) {
sources.set(value, source(true));
set(this.#size, sources.size);
this.#increment_version();
}
return this;
}
/** @param {T} value */
delete(value) {
var sources = this.#sources;
var s = sources.get(value);
if (s !== undefined) {
var removed = sources.delete(value);
set(this.#size, sources.size);
set(s, false);
this.#increment_version();
return removed;
}
return false;
}
clear() {
var sources = this.#sources;
if (sources.size !== 0) {
set(this.#size, 0);
for (var s of sources.values()) {
set(s, false);
}
this.#increment_version();
}
sources.clear();
}
keys() {
get(this.#version);
return map(this.#sources.keys(), (key) => key, 'Set Iterator');
}
values() {
return this.keys();
}
entries() {
return map(this.keys(), (key) => /** @type {[T, T]} */ ([key, key]), 'Set Iterator');
}
[Symbol.iterator]() {
return this.keys();
}
get size() {
return get(this.#size);
}
}
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