import { registerSync } from './reconstruct.ts';

export class BoolAtomic {
  static readonly byteSize = 1;
  static readonly byteAlignment = 1;
  private readonly view: Uint8Array;

  constructor(buffer?: SharedArrayBuffer, byteOffset?: number) {
    const buf = buffer ?? new SharedArrayBuffer(1);
    const offset = byteOffset ?? 0;
    this.view = new Uint8Array(buf, offset, 1);
  }

  load(): boolean {
    return Atomics.load(this.view, 0) !== 0;
  }

  store(value: boolean): void {
    Atomics.store(this.view, 0, value ? 1 : 0);
  }

  and(value: boolean): boolean {
    return Atomics.and(this.view, 0, value ? 1 : 0) !== 0;
  }

  or(value: boolean): boolean {
    return Atomics.or(this.view, 0, value ? 1 : 0) !== 0;
  }

  xor(value: boolean): boolean {
    return Atomics.xor(this.view, 0, value ? 1 : 0) !== 0;
  }

  exchange(value: boolean): boolean {
    return Atomics.exchange(this.view, 0, value ? 1 : 0) !== 0;
  }

  compareExchange(expected: boolean, replacement: boolean): boolean {
    return Atomics.compareExchange(this.view, 0, expected ? 1 : 0, replacement ? 1 : 0) !== 0;
  }

  [Symbol.for('moroutine.shared')](): { tag: string; buffer: SharedArrayBuffer; byteOffset: number } {
    return { tag: 'BoolAtomic', buffer: this.view.buffer as SharedArrayBuffer, byteOffset: this.view.byteOffset };
  }
}

registerSync('BoolAtomic', BoolAtomic);