const DEFAULT_MIN_INTERVAL_MS = 8000;
const JITTER_MAX_MS = 8000;

export class WhatsAppThrottleClass {
    private lastSentAt: Map<string, number> = new Map();
    private minIntervalMs: number;

    constructor(minIntervalMs: number = DEFAULT_MIN_INTERVAL_MS) {
        this.minIntervalMs = minIntervalMs;
    }

    canSend(companyId: string): boolean {
        const lastSent = this.lastSentAt.get(companyId);
        if (!lastSent) {
            return true;
        }

        const elapsed = Date.now() - lastSent;
        const jitter = Math.floor(Math.random() * JITTER_MAX_MS);
        const requiredInterval = this.minIntervalMs + jitter;

        return elapsed >= requiredInterval;
    }

    recordSent(companyId: string): void {
        this.lastSentAt.set(companyId, Date.now());
    }
}