using GadgetCore.API;
using GadgetCore.API.ConfigMenu;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using UnityEngine;
using UnityEngine.UI;

namespace QuickStack
{
  public class GadgetConfigDropdownComponent : GadgetConfigComponent
  {
    public string Value { get; protected set; }
    public string[] Values { get; protected set; }
    public readonly string DefaultValue;

    private readonly Action<string> ValueSetter;
    private RectTransform[] Entries;

    public GadgetConfigDropdownComponent(BasicGadgetConfigMenu configMenu, string name, string value, string[] values, Action<string> valueSetter, float height = 0.1f) : base(configMenu, name, height)
    {
      Value = value;
      Values = values;
      ValueSetter = valueSetter;
    }

    private T GetFromStatic<T>(string classString, string paramString)
    {
      var type = Type.GetType("GadgetCore" + "." + classString + ", GadgetCore");
      var property = type.GetProperty(paramString, BindingFlags.Public | BindingFlags.Static);
      MethodInfo strGetter = property.GetGetMethod();
      return (T)strGetter.Invoke(null, null);
    }

    public override void Build(RectTransform parent)
    {
      var ModConfigMenuText = GetFromStatic<GameObject>("SceneInjector", "ModConfigMenuText");
      var BoxSprite = GetFromStatic<Sprite>("SceneInjector", "BoxSprite");
      var textureMenuTile = GadgetCoreAPI.LoadTexture2D("menuTile.png");
      var MenuTile = Sprite.Create(textureMenuTile, BoxSprite.rect, BoxSprite.pivot, BoxSprite.pixelsPerUnit, default, default, BoxSprite.border);
      if (!string.IsNullOrEmpty(Name))
      {
        StringBuilder nameString = new StringBuilder();
        int spacesAdded = 0;
        foreach (char c in Name)
        {
          if (nameString.Length > 0 && char.IsUpper(c) && !char.IsUpper(Name[nameString.Length - spacesAdded - 1]) && (Name.Length == 1 || !char.IsUpper(Name[nameString.Length - spacesAdded - 2]) || (Name.Length > 2 && !char.IsUpper(Name[nameString.Length - spacesAdded - 3]))))
          {
            spacesAdded++;
            nameString.Append(' ');
          }
          nameString.Append(nameString.Length > 0 ? c : char.ToUpper(c));
        }
        Text label = new GameObject("Label", typeof(RectTransform), typeof(CanvasRenderer), typeof(Text)).GetComponent<Text>();
        label.rectTransform.SetParent(parent);
        label.rectTransform.anchorMin = new Vector2(0f, 0f);
        label.rectTransform.anchorMax = new Vector2(0.25f, 1f);
        label.rectTransform.offsetMin = new Vector2(0, 0);
        label.rectTransform.offsetMax = new Vector2(-10, 0);
        label.text = nameString + ":";
        label.font = ModConfigMenuText.GetComponent<TextMesh>().font;
        label.fontSize = 12;
        label.horizontalOverflow = HorizontalWrapMode.Wrap;
        label.alignment = TextAnchor.MiddleLeft;
      }
      RectTransform button = new GameObject("Button", typeof(RectTransform), typeof(Button), typeof(CanvasRenderer), typeof(Image)).GetComponent<RectTransform>();
      button.SetParent(parent);
      button.anchorMin = new Vector2(0.25f, 0f);
      button.anchorMax = new Vector2(0.75f, 1f);
      button.offsetMin = new Vector2(10, 0);
      button.offsetMax = new Vector2(-10, 0);
      button.GetComponent<Image>().sprite = BoxSprite;
      button.GetComponent<Image>().type = Image.Type.Sliced;
      button.GetComponent<Image>().fillCenter = true;
      button.GetComponent<Button>().onClick.AddListener(() =>
      {
        bool set = Entries[0] != null && !Entries[0].gameObject.active;
        for (int i = 0; i < Entries.Length; i++)
        {
          Entries[i].gameObject.SetActive(set);
        }
        parent.SetAsLastSibling();
      });
      Text buttonLabel = new GameObject("Label", typeof(RectTransform), typeof(CanvasRenderer), typeof(Text)).GetComponent<Text>();
      buttonLabel.rectTransform.SetParent(button);
      buttonLabel.rectTransform.anchorMin = new Vector2(0f, 0f);
      buttonLabel.rectTransform.anchorMax = new Vector2(1f, 1f);
      buttonLabel.rectTransform.offsetMin = new Vector2(2.5f, 2.5f);
      buttonLabel.rectTransform.offsetMax = new Vector2(-2.5f, -2.5f);
      buttonLabel.font = ModConfigMenuText.GetComponent<TextMesh>().font;
      buttonLabel.horizontalOverflow = HorizontalWrapMode.Wrap;
      buttonLabel.verticalOverflow = VerticalWrapMode.Truncate;
      buttonLabel.alignment = TextAnchor.MiddleCenter;
      buttonLabel.text = Value;
      Entries = new RectTransform[Values.Length];
      for (int i = 0; i < Values.Length; i++)
      {
        int ic = i;
        RectTransform dropButton = new GameObject("Button", typeof(RectTransform), typeof(Button), typeof(CanvasRenderer), typeof(Image)).GetComponent<RectTransform>();
        dropButton.SetParent(button);
        dropButton.anchorMin = new Vector2(0.25f, 0f);
        dropButton.anchorMax = new Vector2(0.75f, 1f);
        dropButton.offsetMin = new Vector2(-42, -24 * i - 24);
        dropButton.offsetMax = new Vector2(42, -24 * i - 24);
        dropButton.GetComponent<Image>().sprite = MenuTile;
        dropButton.GetComponent<Image>().type = Image.Type.Sliced;
        dropButton.GetComponent<Image>().fillCenter = true;
        dropButton.GetComponent<Button>().onClick.AddListener(() =>
        {
          buttonLabel.text = Values[ic];
          Value = Values[ic];
          ValueSetter.Invoke(Values[ic]);
          for (int j = 0; j < Entries.Length; j++)
          {
            Entries[j].gameObject.SetActive(false);
            Entries[j].gameObject.GetComponent<RectTransform>().SetAsLastSibling();
          }
        });

        Text dropButtonLabel = new GameObject("Label", typeof(RectTransform), typeof(CanvasRenderer), typeof(Text)).GetComponent<Text>();
        dropButtonLabel.rectTransform.SetParent(dropButton);
        dropButtonLabel.rectTransform.anchorMin = new Vector2(0f, 0f);
        dropButtonLabel.rectTransform.anchorMax = new Vector2(1f, 1f);
        dropButtonLabel.rectTransform.offsetMin = new Vector2(2.5f, 2.5f);
        dropButtonLabel.rectTransform.offsetMax = new Vector2(-2.5f, -2.5f);
        dropButtonLabel.font = ModConfigMenuText.GetComponent<TextMesh>().font;
        dropButtonLabel.horizontalOverflow = HorizontalWrapMode.Wrap;
        dropButtonLabel.verticalOverflow = VerticalWrapMode.Truncate;
        dropButtonLabel.alignment = TextAnchor.MiddleCenter;
        dropButtonLabel.text = Values[i];
        Entries[i] = dropButton;
        dropButton.gameObject.SetActive(false);
      }
    }
  }
}