using System.Collections.Generic;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using MonoGameLibrary.Input;

namespace FNAF_Clone.GUI;


public class Screen {
    
    public static Dictionary<string, Screen> Screens = new();
    public static Screen CurrentScreen{ get; private set; }

    public static void AddScreens((string id, Screen screen)[] screens) {
        foreach (var tuple in screens){
            Screens.Add(tuple.id, tuple.screen);
        }
    }
    public static void AddScreen(string id, Screen screen, bool activate = false) {
        Screens.Add(id, screen);
        if (activate) SetScreen(id);
    }
    
    public static void SetScreen(string id) {
        CurrentScreen = Screens[id];
        CurrentScreen.Active = true;
    }
    
    public static void RemoveScreen(string id) {
        Screens.Remove(id); 
    }
    
    public enum ScreenType {
        MAIN_MENU,
        OFFICE,
        CAMERAS
    }
    
    
    public ScreenType Type{ get; private set; }
    private Dictionary<string, UIElement> elements = new();
    public bool Active { get; private set; } = false;
    private InputListenerHook mouseInputHook = new(true);
    
    public Screen(ScreenType type) {
        Type = type;
        InputManager.AddListener(InputManager.MouseButton.LEFT, () => ProcessMouseInput(InputManager.MouseState), InputTiming.PRESS, mouseInputHook);
    }

    public Screen(ScreenType type, Dictionary<string, UIElement> elements) {
        this.elements = elements;
        Type = type;
    }

    public void AddElement(string id, UIElement element) {
        elements.Add(id, element);
    }
    
    public void SetActive(bool active) {
        Active = active;
        if (Active == active) return;
        foreach (var keyValuePair in elements){
            keyValuePair.Value.Active = Active;
        }
        
    }

    private void ProcessMouseInput(MouseState mouseState) {
        foreach (var element in elements.Values){
            if (!element.Pressable) continue;
            
            if (element.IsWithinBounds(mouseState.Position)){
                element.OnMousePress(); // TODO: differentiate between press, hold and release events
            }
        }
    }

    public void Update() {
        
        
        foreach (var keyValuePair in elements){
            keyValuePair.Value.Update();
        }
    }

    public void Draw(SpriteBatch spriteBatch) {
        foreach (var val in elements.Values){
            val.Draw(spriteBatch);
        }
    }
}