using System;
using System.Linq;
using BriarQueen.Framework.Managers.Interaction.Data;
using UnityEditor;
using UnityEngine;

namespace BriarQueen.Editor.Drawers
{
    [CustomPropertyDrawer(typeof(BaseInteraction), true)]
    public class BaseItemInteractionDrawer : PropertyDrawer
    {
        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
        {
            EditorGUI.BeginProperty(position, label, property);

            if (property.managedReferenceValue == null)
            {
                if (GUI.Button(position, "Select Interaction Type"))
                {
                    ShowTypeMenu(property);
                }

                EditorGUI.EndProperty();
                return;
            }

            var type = property.managedReferenceValue.GetType();
            var headerRect = new Rect(position.x, position.y, position.width, EditorGUIUtility.singleLineHeight);

            if (GUI.Button(headerRect, type.Name, EditorStyles.popup))
            {
                ShowTypeMenu(property);
            }

            var bodyRect = new Rect(
                position.x,
                position.y + EditorGUIUtility.singleLineHeight + 2,
                position.width,
                position.height - EditorGUIUtility.singleLineHeight - 2);

            EditorGUI.indentLevel++;
            EditorGUI.PropertyField(bodyRect, property, GUIContent.none, true);
            EditorGUI.indentLevel--;

            EditorGUI.EndProperty();
        }

        private void ShowTypeMenu(SerializedProperty property)
        {
            var menu = new GenericMenu();

            var types = AppDomain.CurrentDomain.GetAssemblies()
                .SelectMany(a => a.GetTypes())
                .Where(t =>
                    !t.IsAbstract &&
                    typeof(BaseInteraction).IsAssignableFrom(t));

            foreach (var type in types)
            {
                menu.AddItem(new GUIContent(type.Name), false, () =>
                {
                    property.serializedObject.Update();
                    property.managedReferenceValue = Activator.CreateInstance(type);
                    property.serializedObject.ApplyModifiedProperties();
                });
            }

            menu.ShowAsContext();
        }

        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
        {
            if (property.managedReferenceValue == null)
                return EditorGUIUtility.singleLineHeight;

            return EditorGUI.GetPropertyHeight(property, true) + EditorGUIUtility.singleLineHeight + 4;
        }
    }
}