using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.InputSystem;

namespace NewHorizons.Utility
{
    [RequireComponent(typeof(DebugRaycaster))]
    [RequireComponent(typeof(DebugPropPlacer))]
    class DebugMenu : MonoBehaviour
    {
        GUIStyle _editorMenuStyle;
        Vector2 EditorMenuSize = new Vector2(600, 900);
        bool menuOpen = false;

        DebugPropPlacer _dpp;
        DebugRaycaster _drc;

        private void Awake()
        {  
            _dpp = this.GetRequiredComponent<DebugPropPlacer>();
            _drc = this.GetRequiredComponent<DebugRaycaster>();
        }

        private void Update()
        {
            if (!Main.Debug) return;

            if (Keyboard.current[Key.Escape].wasPressedThisFrame)
            {
                menuOpen = !menuOpen;
                if (menuOpen) InitMenu();
            }
        }
        
        private void OnGUI()
        {
            if (!menuOpen) return;
            if (!Main.Debug) return;

            Vector2 menuPosition = Vector2.zero; // new Vector2(Screen.width - EditorMenuSize.x - 10, 10);
            
            //TODO: add gui for stuff https://github.com/Bwc9876/OW-SaveEditor/blob/master/SaveEditor/SaveEditor.cs
            // https://docs.unity3d.com/ScriptReference/GUI.TextField.html

            GUILayout.BeginArea(new Rect(menuPosition.x, menuPosition.y, EditorMenuSize.x, EditorMenuSize.y), _editorMenuStyle);
            _dpp.currentObject = GUILayout.TextArea(_dpp.currentObject);

            // TODO: maintain list of objects here
            // TODO: field to provide name of mod to load configs from

            GUILayout.Label("*: Restart Required");
            GUILayout.Space(20);
            GUILayout.Label("*: Restart Required");
            GUILayout.EndArea();
        }

        private void InitMenu()
        {
            if (_editorMenuStyle != null) return;
            
            _dpp = this.GetRequiredComponent<DebugPropPlacer>();
            _drc = this.GetRequiredComponent<DebugRaycaster>();


            Texture2D bgTexture = MakeTexture((int)EditorMenuSize.x, (int)EditorMenuSize.y, Color.black);

            _editorMenuStyle = new GUIStyle
            {
                normal =
                {
                    background = bgTexture
                }
            };
        }

        private Texture2D MakeTexture(int width, int height, Color color)
        {
            Color[] pixels = new Color[width*height];
 
            for(int i = 0; i < pixels.Length; i++)
            {
                pixels[i] = color;
            }
 
            Texture2D newTexture = new Texture2D(width, height);
            newTexture.SetPixels(pixels);
            newTexture.Apply();
            return newTexture;
        }
    }
}