// Content/Toasts/Components/AC_ToastSystem.ts

// TODO: Написать тесты

import {AddToArray, CreateWidget, GetGameTimeInSeconds, IsValid, Print, RemoveIndexFromArray} from "../../functions.js";
import {WBP_ToastContainer} from "../UI/WBP_ToastContainer.js";
import type {Float, Integer, Text} from "../../types.js";
import {E_MessageType} from "../../UI/Enums/E_MessageType.js";
import type {S_ToastMessage} from "../Structs/S_ToastMessage.js";
import type {S_ToastSettings} from "../Structs/S_ToastSettings.js";
import type {WBP_Toast} from "../UI/WBP_Toast.js";

export class AC_ToastSystem {
  // Category: "System Configuration"
  // Instance Editable: true
  /**
   * Toast system configuration settings
   * Simplified - no positioning settings needed
   * Instance editable for designer customization
   */
  public ToastSettings: S_ToastSettings = {
    MaxVisibleToasts: 5,
    DefaultDuration: 3.0,
    AlsoLogToConsole: true,
    IsEnabled: true
  };

  // Category: "System State"
  /**
   * System initialization state flag
   * Set to true after successful InitializeToastSystem call
   */
  private IsInitialized: boolean = false;

  // Category: "System State"
  /**
   * Next unique ID for new toasts
   * Incremented for each new toast
   */
  private NextToastID: Integer = 1;

  // Category: "Container Management"
  /**
   * Toast container widget that handles all positioning
   * Replaces manual position management
   */
  private ToastContainer: WBP_ToastContainer | null = null;

  // Category: "Toast Management"
  /**
   * Array of currently active toast messages
   * Contains all visible toasts
   */
  private ActiveToasts: S_ToastMessage[] = [];

  // Category: "Widget Management"
  /**
   * Array of toast widget instances
   * Corresponds to ActiveToasts array
   */
  private ToastWidgets: WBP_Toast[] = [];

  // Category: "Toast Management"
  // Pure: true
  /**
   * Check if toast system should process updates this frame
   * @returns True if system is initialized and enabled
   * @pure Function has no side effects
   */
  private ShouldProcessToasts(): boolean {
    return this.IsInitialized && this.ToastSettings.IsEnabled && IsValid(this.ToastContainer);
  }

  // Category: "Toast Lifecycle"
  /**
   * Remove expired toasts from the system
   * @private Internal cleanup method
   */
  private RemoveExpiredToasts(): void {
    let i = 0;

    while (i < this.ActiveToasts.length) {
      if ((GetGameTimeInSeconds() - this.ActiveToasts[i].CreatedTime) > this.ActiveToasts[i].Duration) {
        if (IsValid(this.ToastWidgets[i]) && IsValid(this.ToastContainer)) {
          this.ToastContainer.RemoveToast(this.ToastWidgets[i]);
        }

        RemoveIndexFromArray(this.ActiveToasts, i);
        RemoveIndexFromArray(this.ToastWidgets, i);
      } else {
        i++;
      }
    }
  }

  // Category: "Toast Lifecycle"
  /**
   * Enforce maximum visible toasts limit
   * Uses container's capacity management
   * @private Internal management method
   */
  private EnforceToastLimit(): void {
    while(this.ActiveToasts.length >= this.ToastSettings.MaxVisibleToasts) {
      if (IsValid(this.ToastWidgets[0])) {
        this.ToastContainer.RemoveToast(this.ToastWidgets[0]);
      }

      RemoveIndexFromArray(this.ActiveToasts, 0);
      RemoveIndexFromArray(this.ToastWidgets, 0);
    }
  }

  // Category: "Toast Creation"
  /**
   * Create and display a new toast message
   * Uses container for automatic positioning
   * @param Message - Text to display in the toast
   * @param Type - Type of toast (affects color and styling)
   * @param Duration - How long to display toast (optional, uses default)
   * @returns Toast ID for tracking
   * @public Main interface for creating toasts
   * @example
   * // Create success toast
   * ShowToast("Test passed!", E_ToastType.Success, 2.0)
   * // Create error toast with default duration
   * ShowToast("Test failed!", E_ToastType.Error)
   */
  public ShowToast(Message: Text, Type: E_MessageType, Duration?: Float): Integer {
    if (this.ShouldProcessToasts()) {
      const toastDuration = Duration === 0 ? this.ToastSettings.DefaultDuration : Duration;
      const currentTime = GetGameTimeInSeconds();
      const newToast: S_ToastMessage = {
        ID: this.NextToastID++,
        Message: Message,
        Type: Type,
        Duration: toastDuration,
        CreatedTime: currentTime,
      }

      this.EnforceToastLimit();

      const toastWidget = this.ToastContainer.AddToast(Message, Type);

      if (IsValid(toastWidget)) {
        AddToArray(this.ActiveToasts, newToast);
        AddToArray(this.ToastWidgets, toastWidget);

        if (this.ToastSettings.AlsoLogToConsole) {
          Print(`[${Type}] ${Message}`, false, true);
        }

        return newToast.ID;
      } else {
        return -1;
      }
    }

    if (this.ToastSettings.AlsoLogToConsole) {
      Print(`[${Type}] ${Message}`, false, true);
    }

    return -1;
  }

  // Category: "System Main Loop"
  /**
   * Simplified update loop for toast system
   * Container handles positioning automatically
   * @public Called by BP_MainCharacter or game framework
   */
  public UpdateToastSystem(): void {
    if (this.ShouldProcessToasts()) {
      this.RemoveExpiredToasts();
    }
  }

  // Category: "System Setup"
  /**
   * Initialize toast system with container
   * @public Called by BP_MainCharacter during initialization
   * @example
   * // Initialize toast system in main character
   * this.ToastSystemComponent.InitializeToastSystem();
   */
  public InitializeToastSystem(): void {
    this.ToastContainer = CreateWidget(new WBP_ToastContainer);
    this.ToastContainer.InitializeContainer();
    this.IsInitialized = true;
    this.NextToastID = 1;
    this.ShowToast(("Toast System Initialized" as Text), E_MessageType.Info);
  }
}