import { toZonedTime } from 'date-fns-tz';

class HumanSchedule {
  constructor(config) {
    this.config = config;
    this.timezone = config.schedule.timezone;
  }

  isWorkHours(date = new Date()) {
    return true;
  }

  isWeekend(date = new Date()) {
    return false;
  }

  isLunchTime(date = new Date()) {
    return false;
  }

  getNextWorkTime(date = new Date()) {
    return date;
  }

  getRandomWorkInterval() {
    const minMs = this.config.activity.minIntervalMinutes * 60 * 1000;
    const maxMs = this.config.activity.maxIntervalMinutes * 60 * 1000;

    const baseDelay = Math.random() * (maxMs - minMs) + minMs;

    const intensity = this.getEnergyLevel();
    const intensityFactor = 1 - (intensity - 0.5);

    return Math.floor(baseDelay * intensityFactor);
  }

  getEnergyLevel(date = new Date()) {
    const localTime = toZonedTime(date, this.timezone);
    const hour = localTime.getHours();
    const dayOfWeek = localTime.getDay();

    let baseEnergy = 0.7;

    if (hour >= 7 && hour < 11) baseEnergy = 0.8;
    else if (hour >= 11 && hour < 14) baseEnergy = 0.9;
    else if (hour >= 14 && hour < 17) baseEnergy = 0.7;
    else if (hour >= 17 && hour < 20) baseEnergy = 0.6;
    else if (hour >= 20 && hour < 23) baseEnergy = 0.5;
    else baseEnergy = 0.4;

    const dayEnergy = {
      0: 0.7, 1: 0.85, 2: 0.95, 3: 0.9, 4: 0.8, 5: 0.6, 6: 0.5
    }[dayOfWeek] || 0.7;

    return Math.max(0.1, Math.min(1, baseEnergy * dayEnergy + (Math.random() - 0.5) * 0.2));
  }

  getDayOfWeekName(date = new Date()) {
    const localTime = toZonedTime(date, this.timezone);
    const days = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
    return days[localTime.getDay()];
  }

  getWorkPeriod(date = new Date()) {
    const localTime = toZonedTime(date, this.timezone);
    const hour = localTime.getHours();

    if (hour >= 4 && hour < 7) return 'earlyMorning';
    if (hour >= 7 && hour < 11) return 'morning';
    if (hour >= 11 && hour < 14) return 'midday';
    if (hour >= 14 && hour < 17) return 'afternoon';
    if (hour >= 17 && hour < 20) return 'evening';
    if (hour >= 20 && hour < 23) return 'night';
    return 'lateNight';
  }
}

export default HumanSchedule;