import { store } from "./db.js";
import { runCapture } from "./capture.js";

class CaptureQueue {
  private queue: string[] = [];
  private running = false;

  enqueue(id: string): void {
    if (!this.queue.includes(id)) this.queue.push(id);
    void this.drain();
  }

  restorePending(): void {
    for (const row of store.queuedCaptures()) {
      store.updateStatus(row.id, "queued");
      this.enqueue(row.id);
    }
  }

  private async drain(): Promise<void> {
    if (this.running) return;
    this.running = true;
    try {
      while (this.queue.length) {
        const id = this.queue.shift()!;
        const row = store.getCapture(id);
        if (!row || row.status === "ready") continue;
        await runCapture(row);
      }
    } finally {
      this.running = false;
    }
  }
}

export const captureQueue = new CaptureQueue();