using System;
using UnityEditor;
using UnityEngine;

namespace Module.Inspector.Editor
{
    internal sealed class EditorWindowStringToField : EditorWindow
    {
        private string[] names;
        private string[] descriptions;

        private string filter = string.Empty;
        private bool needFocus = true;
        
        private Vector2 scrollPosition;
        private GUIStyle style0;
        private GUIStyle style1;

        private SerializedProperty property;
        
        public static void Open(Type type, SerializedProperty property)
        {
            var window = GetWindow<EditorWindowStringToField>();
            window.titleContent = new GUIContent(type.Name);
            window.names = EditorTypeUtility.GetFieldsAsStrings(type);
            window.descriptions = EditorTypeUtility.GetFieldsAsDescriptions(type);
            window.property = property;
            window.ShowAuxWindow();
        }

        private void OnGUI()
        {
            if (!IsValid())
                return;
            
            CreateStyles();

            EditorGUILayout.BeginVertical();
            {
                EditorGUILayout.BeginHorizontal();
                {
                    GUILayout.Label("Search");
                    
                    GUI.SetNextControlName("TextField_Filter");
                    filter = EditorGUILayout.TextField(filter, GUILayout.Width(128));
                
                    GUILayout.FlexibleSpace();
                
                    if (GUILayout.Button("Close"))
                        Close();
                }
                EditorGUILayout.EndHorizontal();
            
                scrollPosition = EditorGUILayout.BeginScrollView(scrollPosition);
                {
                    for (int i = 0, j = 0; i < descriptions.Length; i++)
                    {
                        if (!descriptions[i].Contains(filter))
                            continue;

                        j++;
                        
                        if (!GUILayout.Button(descriptions[i], j % 2 == 0 ? style0 : style1))
                            continue;

                        property.stringValue = names[i];
                        property.serializedObject.ApplyModifiedProperties();
                        Close();
                    }
                }
                EditorGUILayout.EndScrollView();
            }
            EditorGUILayout.EndVertical();

            if (needFocus)
            {
                needFocus = false;
                GUI.FocusControl("TextField_Filter");
            }
        }

        private bool IsValid()
        {
            return names != null;
        }

        private void CreateStyles()
        {
            if (style0 != null)
                return;

            style0 = new GUIStyle(GUI.skin.box)
            {
                stretchWidth = true,
                alignment = TextAnchor.MiddleLeft,
                richText = true
            };

            style1 = new GUIStyle(style0)
            {
                normal = { background = null }
            };
        }
    }
}