using System;
using Milaine.Interfaces;

namespace Milaine.Managers;

public sealed class DayNightManager : Component, IManager {
  // 60 -> seconds
  private const int MINUTE = 60;
  // 5 mins
  private const int MAX_TIME = 5 * MINUTE;
  public const int MAX_DAYS = 5;

  [Property]
  public float DayDuration { get; set; } = MAX_TIME;

  [Property]
  public int Day { get; set; } = 1;

  // hour in 24h
  private readonly float startHour = 8f;
  private readonly float endHour = 18f;

  private bool isDayActive = false;
  private TimeUntil timeUntilNight;

  public string CurrentTimeString { get; private set; } = "8:00 AM";

  public Action OnStartDay;
  public Action OnEndDay;

  protected override void OnStart() {
    StartDay();
  }

  protected override void OnUpdate() {
    if (!isDayActive) {
      return;
    }

    float elapsedSeconds = DayDuration - timeUntilNight;
    float progress = MathX.Clamp(elapsedSeconds / DayDuration, 0f, 1f);
    float totalVirtualHours = endHour - startHour;
    float currentVirtualHour = startHour + (progress * totalVirtualHours);

    int hours = (int)MathF.Floor(currentVirtualHour);
    int minutes = (int)MathF.Floor((currentVirtualHour - hours) * 60f);

    string amPm = hours >= 12 ? "PM" : "AM";
    int displayHour = hours % 12;

    if (displayHour == 0) {
      displayHour = 12;
    }

    CurrentTimeString = $"{displayHour:D2}:{minutes:D2} {amPm}";

    if (timeUntilNight) {
      EndDay();
    }
  }

  private void StartDay() {
    if (isDayActive) {
      return;
    }

    timeUntilNight = DayDuration;
    isDayActive = true;

    OnStartDay?.Invoke();
  }

  private void EndDay() {
    ResetManager(deep: false);
    OnEndDay?.Invoke();
  }

  public void ResetManager(bool deep = false) {
    if (deep) {
      CurrentTimeString = "8:00 AM";
    }

    isDayActive = false;
  }

  public void NextDay() {
    if (Day >= MAX_DAYS) {
      return;
    }

    Day += 1;
    StartDay();
  }

  public void Restart() {
    Day = 1;
    StartDay();
  }
}