x-ratelimit-limit: 1000
x-ratelimit-remaining: 999
x-ratelimit-reset: 1635724800
x-ratelimit-used: 1

interface RateLimitInfo {
  limit: number;
  remaining: number;
  reset: number;
  used: number;
}

class RateLimitHandler {
  private rateLimits: Map<string, RateLimitInfo> = new Map();

  constructor(private client: APIClient) {
    this.client.on('response', this.updateRateLimits.bind(this));
  }

  private updateRateLimits(response: Response): void {
    const service = new URL(response.url).hostname;
    
    this.rateLimits.set(service, {
      limit: parseInt(response.headers.get('x-ratelimit-limit') || '0'),
      remaining: parseInt(response.headers.get('x-ratelimit-remaining') || '0'),
      reset: parseInt(response.headers.get('x-ratelimit-reset') || '0'),
      used: parseInt(response.headers.get('x-ratelimit-used') || '0')
    });
  }

  public getRateLimit(service: string): RateLimitInfo | undefined {
    return this.rateLimits.get(service);
  }

  public async waitForReset(service: string): Promise<void> {
    const limit = this.getRateLimit(service);
    if (!limit) return;

    const now = Math.floor(Date.now() / 1000);
    const waitTime = Math.max(0, limit.reset - now) * 1000;
    
    if (waitTime > 0) {
      await new Promise(resolve => setTimeout(resolve, waitTime));
    }
  }
}

interface RetryOptions {
  maxRetries: number;
  baseDelay: number;
  maxDelay: number;
}

class RetryStrategy {
  constructor(
    private options: RetryOptions = {
      maxRetries: 3,
      baseDelay: 1000,
      maxDelay: 60000
    }
  ) {}

  async execute<T>(
    operation: () => Promise<T>,
    attempt: number = 1
  ): Promise<T> {
    try {
      return await operation();
    } catch (error) {
      if (
        error.status === 429 &&
        attempt <= this.options.maxRetries
      ) {
        const delay = this.calculateDelay(attempt);
        await this.wait(delay);
        return this.execute(operation, attempt + 1);
      }
      throw error;
    }
  }

  private calculateDelay(attempt: number): number {
    const delay = Math.min(
      this.options.maxDelay,
      this.options.baseDelay * Math.pow(2, attempt - 1)
    );
    return delay + Math.random() * delay * 0.1; // Add jitter
  }

  private wait(ms: number): Promise<void> {
    return new Promise(resolve => setTimeout(resolve, ms));
  }
}

from dataclasses import dataclass
from datetime import datetime
import time
from typing import Dict, Optional

@dataclass
class RateLimitInfo:
    limit: int
    remaining: int
    reset: int
    used: int

class RateLimitHandler:
    def __init__(self):
        self.rate_limits: Dict[str, RateLimitInfo] = {}

    def update_rate_limits(self, response) -> None:
        service = response.url.split('/')[2]
        
        self.rate_limits[service] = RateLimitInfo(
            limit=int(response.headers.get('x-ratelimit-limit', 0)),
            remaining=int(response.headers.get('x-ratelimit-remaining', 0)),
            reset=int(response.headers.get('x-ratelimit-reset', 0)),
            used=int(response.headers.get('x-ratelimit-used', 0))
        )

    def get_rate_limit(self, service: str) -> Optional[RateLimitInfo]:
        return self.rate_limits.get(service)

    async def wait_for_reset(self, service: str) -> None:
        limit = self.get_rate_limit(service)
        if not limit:
            return

        now = int(time.time())
        wait_time = max(0, limit.reset - now)
        
        if wait_time > 0:
            time.sleep(wait_time)

import asyncio
from dataclasses import dataclass
import random
from typing import TypeVar, Callable, Awaitable

T = TypeVar('T')

@dataclass
class RetryOptions:
    max_retries: int = 3
    base_delay: float = 1.0
    max_delay: float = 60.0

class RetryStrategy:
    def __init__(self, options: RetryOptions = RetryOptions()):
        self.options = options

    async def execute(
        self,
        operation: Callable[[], Awaitable[T]],
        attempt: int = 1
    ) -> T:
        try:
            return await operation()
        except Exception as error:
            if (
                getattr(error, 'status', None) == 429 and
                attempt <= self.options.max_retries
            ):
                delay = self._calculate_delay(attempt)
                await asyncio.sleep(delay)
                return await self.execute(operation, attempt + 1)
            raise error

    def _calculate_delay(self, attempt: int) -> float:
        delay = min(
            self.options.max_delay,
            self.options.base_delay * (2 ** (attempt - 1))
        )
        # Add jitter
        return delay + random.random() * delay * 0.1

class RateLimitMonitor {
  constructor(private storage: MetricsStorage) {}

  async trackUsage(rateLimitInfo: RateLimitInfo, service: string): Promise<void> {
    await this.storage.record({
      timestamp: new Date(),
      service,
      remaining: rateLimitInfo.remaining,
      used: rateLimitInfo.used,
      limit: rateLimitInfo.limit
    });
  }

  async getUsageMetrics(
    service: string,
    startTime: Date,
    endTime: Date
  ): Promise<UsageMetrics> {
    const usage = await this.storage.query({
      service,
      timestamp: {
        $gte: startTime,
        $lte: endTime
      }
    });

    return this.calculateMetrics(usage);
  }

  private calculateMetrics(usage: RateLimitRecord[]): UsageMetrics {
    // Implementation
  }
}

interface AlertConfig {
  thresholdPercentage: number;
  cooldownPeriod: number;
  notificationChannels: string[];
}

class RateLimitAlert {
  private lastAlertTime: Map<string, number> = new Map();

  constructor(
    private config: AlertConfig,
    private notifier: AlertNotifier
  ) {}

  async checkAndAlert(
    service: string,
    rateLimitInfo: RateLimitInfo
  ): Promise<void> {
    const usagePercentage = 
      (rateLimitInfo.used / rateLimitInfo.limit) * 100;

    if (
      usagePercentage >= this.config.thresholdPercentage &&
      this.canSendAlert(service)
    ) {
      await this.sendAlert(service, usagePercentage);
      this.updateLastAlertTime(service);
    }
  }

  private canSendAlert(service: string): boolean {
    const lastAlert = this.lastAlertTime.get(service) || 0;
    return Date.now() - lastAlert >= this.config.cooldownPeriod;
  }

  private async sendAlert(
    service: string,
    usagePercentage: number
  ): Promise<void> {
    await this.notifier.send({
      type: 'RATE_LIMIT_WARNING',
      service,
      usagePercentage,
      timestamp: new Date(),
      message: `Rate limit usage at ${usagePercentage.toFixed(1)}%`
    });
  }

  private updateLastAlertTime(service: string): void {
    this.lastAlertTime.set(service, Date.now());
  }
}

interface BatchOptions {
  maxBatchSize: number;
  maxWaitTime: number;
}

class RequestBatcher<T, R> {
  private batch: T[] = [];
  private timer: NodeJS.Timeout | null = null;
  private promises: Array<{
    resolve: (value: R) => void;
    reject: (error: any) => void;
  }> = [];

  constructor(
    private processBatch: (items: T[]) => Promise<R[]>,
    private options: BatchOptions
  ) {}

  async add(item: T): Promise<R> {
    this.batch.push(item);

    if (this.batch.length >= this.options.maxBatchSize) {
      return this.flush();
    }

    if (!this.timer) {
      this.timer = setTimeout(
        () => this.flush(),
        this.options.maxWaitTime
      );
    }

    return new Promise((resolve, reject) => {
      this.promises.push({ resolve, reject });
    });
  }

  private async flush(): Promise<R> {
    if (this.timer) {
      clearTimeout(this.timer);
      this.timer = null;
    }

    const items = [...this.batch];
    const currentPromises = [...this.promises];
    this.batch = [];
    this.promises = [];

    try {
      const results = await this.processBatch(items);
      results.forEach((result, index) => {
        currentPromises[index].resolve(result);
      });
      return results[0];
    } catch (error) {
      currentPromises.forEach(promise => promise.reject(error));
      throw error;
    }
  }
}

enum RequestPriority {
  HIGH = 'high',
  MEDIUM = 'medium',
  LOW = 'low'
}

interface PrioritizedRequest<T> {
  priority: RequestPriority;
  data: T;
  timestamp: number;
}

class RequestPrioritizer<T> {
  private queues: Map<RequestPriority, PrioritizedRequest<T>[]> = new Map();
  private processing: boolean = false;

  constructor(
    private processor: (data: T) => Promise<void>,
    private rateLimitHandler: RateLimitHandler
  ) {
    Object.values(RequestPriority).forEach(priority => {
      this.queues.set(priority, []);
    });
  }

  async add(data: T, priority: RequestPriority): Promise<void> {
    const queue = this.queues.get(priority)!;
    queue.push({
      priority,
      data,
      timestamp: Date.now()
    });

    if (!this.processing) {
      this.processing = true;
      await this.processQueues();
    }
  }

  private async processQueues(): Promise<void> {
    while (this.hasItems()) {
      const request = this.getNextRequest();
      if (!request) break;

      try {
        await this.processor(request.data);
      } catch (error) {
        if (error.status === 429) {
          await this.rateLimitHandler.waitForReset(
            error.service
          );
          // Re-queue the request
          this.add(request.data, request.priority);
        } else {
          console.error('Request failed:', error);
        }
      }
    }
    this.processing = false;
  }

  private hasItems(): boolean {
    return Array.from(this.queues.values()).some(
      queue => queue.length > 0
    );
  }

  private getNextRequest(): PrioritizedRequest<T> | null {
    for (const priority of Object.values(RequestPriority)) {
      const queue = this.queues.get(priority)!;
      if (queue.length > 0) {
        return queue.shift()!;
      }
    }
    return null;
  }
}