// src/utils/processingTimer.ts
import { logger } from '../services/logger.client';

const PROCESSING_TIMES_KEY = 'flyerProcessingTimes';
const MAX_SAMPLES = 5;

/**
 * Records the duration of a flyer processing job in localStorage.
 * @param durationInSeconds - The processing time in seconds.
 */
export const recordProcessingTime = (durationInSeconds: number): void => {
  try {
    const storedTimes = localStorage.getItem(PROCESSING_TIMES_KEY);
    const times: number[] = storedTimes ? JSON.parse(storedTimes) : [];
    
    // Add the new time and keep only the last MAX_SAMPLES
    times.push(durationInSeconds);
    const recentTimes = times.slice(-MAX_SAMPLES);
    
    localStorage.setItem(PROCESSING_TIMES_KEY, JSON.stringify(recentTimes));
  } catch (error) {
    // Use the centralized logger for consistency.
    logger.error("Could not record processing time in localStorage.", { error });
  }
};

/**
 * Calculates the average processing time from stored durations.
 * @returns The average time in seconds, or a default of 45 seconds if no data exists.
 */
export const getAverageProcessingTime = (): number => {
  try {
    const storedTimes = localStorage.getItem(PROCESSING_TIMES_KEY);
    if (!storedTimes) return 45; // Default estimate if no history

    const times: number[] = JSON.parse(storedTimes);
    if (times.length === 0) return 45;

    const sum = times.reduce((acc, time) => acc + time, 0);
    const average = sum / times.length;
    
    // Return a rounded, reasonable number
    return Math.round(average);
  } catch (error) {
    // Use the centralized logger for consistency.
    logger.error("Could not get average processing time from localStorage.", { error });
    return 45; // Default on error
  }
};
