using System;
using System.Collections.Generic;
using System.Linq;
using UnityEditor;
using UnityEditorInternal;
using UnityEngine;

namespace Module.NavigationTool.Editor.Toolbar
{
    internal sealed class ToolbarScenePickerSettings : IToolbarSettings
    {
        public string Title => "Scene";
        
        private const string PREF_IS_SCENE_ENABLED = "ToolbarSettings_IsSceneEnabled";
        private const string PREF_SCENE_ASSET_LABELS = "ToolbarSettings_SceneAssetLabels";
        
        public static bool IsSceneEnabled
        {
            get => EditorPrefs.GetBool(PREF_IS_SCENE_ENABLED, true);
            private set => EditorPrefs.SetBool(PREF_IS_SCENE_ENABLED, value);
        }
        
        public static List<string> SceneAssetLabels
        {
            get => EditorPrefs.GetString(PREF_SCENE_ASSET_LABELS).Split(',').ToList();
            private set => EditorPrefs.SetString(PREF_SCENE_ASSET_LABELS, string.Join(',', value));
        }

        private ReorderableList assetLabelList;
        private List<string> assetLabels;

        public void Initialize()
        {
            assetLabels = SceneAssetLabels.ToList();
            assetLabelList = new ReorderableList(assetLabels, typeof(string), true, true, true, true);
            assetLabelList.drawElementCallback += OnAssetLabelListDrawElement;
            assetLabelList.drawHeaderCallback += OnAssetLabelListDrawHeader;
            assetLabelList.onAddCallback += OnAssetLabelListAddedElement;
            assetLabelList.onRemoveCallback += OnAssetLabelListRemovedElement;
            assetLabelList.onReorderCallback += OnAssetLabelListReorder;
        }

        public void Draw()
        {
            IsSceneEnabled = EditorGUILayout.Toggle("Enable Scene picker", IsSceneEnabled);

            if (assetLabelList == null)
                return;

            assetLabelList.DoLayoutList();
            SceneAssetLabels = assetLabels;
        }

        private static void OnAssetLabelListDrawHeader(Rect rect)
        {
            EditorGUI.LabelField(rect, "Scene sorting by Asset label");
        }

        private void OnAssetLabelListDrawElement(Rect rect, int index, bool isActive, bool isFocused)
        {
            rect.height -= 2;
            rect.y += 1;
            
            string text = assetLabels[index];
            string temp = EditorGUI.TextField(rect, text);

            if (string.Equals(text, temp, StringComparison.Ordinal))
                return;

            assetLabels[index] = temp;
            ToolScenePicker.SetAsDirty();
        }

        private void OnAssetLabelListAddedElement(ReorderableList list)
        {
            assetLabels.Add(string.Empty);
            ToolScenePicker.SetAsDirty();
        }

        private void OnAssetLabelListRemovedElement(ReorderableList list)
        {
            assetLabels.RemoveAt(list.index);
            ToolScenePicker.SetAsDirty();
        }

        private void OnAssetLabelListReorder(ReorderableList list)
        {
            ToolScenePicker.SetAsDirty();
        }
    }
}