#if UNITY_EDITOR
using UnityEditor;
using UnityEngine;
using RR.Common.Settings;

namespace RR.Common.InspectorOverrides
{
    [CustomPropertyDrawer(typeof(SettingEntry))]
    public class SettingEntryDrawer : PropertyDrawer
    {
        private const float Pad = 6f;

        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
        {
            // Чтоб выглядело стабильнее в узких инспекторах
            bool prevWide = EditorGUIUtility.wideMode;
            float prevLabelWidth = EditorGUIUtility.labelWidth;
            EditorGUIUtility.wideMode = true;
            EditorGUIUtility.labelWidth = 110f;

            EditorGUI.BeginProperty(position, label, property);

            var keyProp        = property.FindPropertyRelative("key");
            var nameProp       = property.FindPropertyRelative("displayName");
            var descProp       = property.FindPropertyRelative("description");
            var groupProp      = property.FindPropertyRelative("group");
            var typeProp       = property.FindPropertyRelative("valueType");

            var defBoolProp    = property.FindPropertyRelative("defaultBool");
            var defIntProp     = property.FindPropertyRelative("defaultInt");
            var defFloatProp   = property.FindPropertyRelative("defaultFloat");
            var defStringProp  = property.FindPropertyRelative("defaultString");

            var minIntProp     = property.FindPropertyRelative("minInt");
            var maxIntProp     = property.FindPropertyRelative("maxInt");
            var minFloatProp   = property.FindPropertyRelative("minFloat");
            var maxFloatProp   = property.FindPropertyRelative("maxFloat");

            var applyProp      = property.FindPropertyRelative("applyTarget");
            var mixerProp      = property.FindPropertyRelative("mixer");
            var mixerParamProp = property.FindPropertyRelative("mixerParameter");
            var minDbProp      = property.FindPropertyRelative("minDb");
            var maxDbProp      = property.FindPropertyRelative("maxDb");

            float line  = EditorGUIUtility.singleLineHeight;
            float space = EditorGUIUtility.standardVerticalSpacing;

            // Card
            var box = new Rect(position.x, position.y, position.width, position.height);
            GUI.Box(box, GUIContent.none, EditorStyles.helpBox);

            var r = new Rect(position.x + Pad, position.y + Pad, position.width - Pad * 2, line);

            // Header foldout
            string header = BuildHeader(nameProp.stringValue, keyProp.stringValue);
            property.isExpanded = EditorGUI.Foldout(r, property.isExpanded, header, true);
            r.y += line + space;

            if (!property.isExpanded)
            {
                EditorGUI.EndProperty();
                EditorGUIUtility.wideMode = prevWide;
                EditorGUIUtility.labelWidth = prevLabelWidth;
                return;
            }

            DrawSectionTitle(ref r, "Meta");
            DrawProp(ref r, nameProp,  "Display Name");
            DrawProp(ref r, keyProp,   "Key");
            DrawProp(ref r, groupProp, "Group");
            DrawProp(ref r, descProp,  "Description", includeChildren: true);

            DrawSectionTitle(ref r, "Value");
            DrawProp(ref r, typeProp, "Value Type");

            var t = (SettingValueType)typeProp.enumValueIndex;

            switch (t)
            {
                case SettingValueType.Bool:
                    DrawProp(ref r, defBoolProp, "Default");
                    break;

                case SettingValueType.Int:
                    DrawProp(ref r, defIntProp, "Default");
                    DrawMinMaxRow(ref r, minIntProp, maxIntProp, "Min", "Max");
                    break;

                case SettingValueType.Float:
                    DrawProp(ref r, defFloatProp, "Default");
                    DrawMinMaxRow(ref r, minFloatProp, maxFloatProp, "Min", "Max");
                    break;

                case SettingValueType.String:
                    DrawProp(ref r, defStringProp, "Default");
                    break;
                    
                case SettingValueType.Button:
                    DrawSectionTitle(ref r, "Button Settings");
                    var buttonTextProp = property.FindPropertyRelative("buttonText");
                    var buttonDataProp = property.FindPropertyRelative("buttonData");
                    var buttonColorProp = property.FindPropertyRelative("buttonColor");
                    var buttonSpriteProp = property.FindPropertyRelative("buttonSprite");
                    
                    DrawProp(ref r, buttonTextProp, "Button Text");
                    DrawProp(ref r, buttonDataProp, "Button Data");
                    DrawProp(ref r, buttonColorProp, "Button Color");
                    DrawProp(ref r, buttonSpriteProp, "Button Sprite");
                    break;
                    
                case SettingValueType.OptionPicker:
                    DrawSectionTitle(ref r, "Option Picker Settings");
                    var optionsProp = property.FindPropertyRelative("options");
                    var defOptionIndexProp = property.FindPropertyRelative("defaultOptionIndex");
                    
                    DrawProp(ref r, optionsProp, "Options", includeChildren: true);
                    DrawProp(ref r, defOptionIndexProp, "Default Index");
                    break;
            }

            DrawSectionTitle(ref r, "Apply");
            DrawProp(ref r, applyProp, "Apply Target");

            var apply = (ApplyTarget)applyProp.enumValueIndex;
            if (apply == ApplyTarget.AudioMixerFloat01ToDb)
            {
                DrawProp(ref r, mixerProp, "Audio Mixer");
                DrawProp(ref r, mixerParamProp, "Exposed Param");
                DrawMinMaxRow(ref r, minDbProp, maxDbProp, "Min dB", "Max dB");
            }

            // Warning
            if (string.IsNullOrWhiteSpace(keyProp.stringValue))
            {
                var warnH = line * 1.4f;
                var warn = new Rect(r.x, r.y, r.width, warnH);
                EditorGUI.HelpBox(warn, "Key is empty - setting won't work.", MessageType.Warning);
                r.y += warnH + space;
            }

            EditorGUI.EndProperty();

            // restore
            EditorGUIUtility.wideMode = prevWide;
            EditorGUIUtility.labelWidth = prevLabelWidth;
        }

        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
        {
            float line  = EditorGUIUtility.singleLineHeight;
            float space = EditorGUIUtility.standardVerticalSpacing;

            float h = 0f;

            // padding + foldout
            h += Pad * 2;
            h += line + space;

            if (!property.isExpanded)
                return h + 2f;

            SerializedProperty keyProp   = property.FindPropertyRelative("key");
            SerializedProperty nameProp  = property.FindPropertyRelative("displayName");
            SerializedProperty groupProp = property.FindPropertyRelative("group");
            SerializedProperty descProp  = property.FindPropertyRelative("description");
            SerializedProperty typeProp  = property.FindPropertyRelative("valueType");
            SerializedProperty applyProp = property.FindPropertyRelative("applyTarget");

            // Meta section title
            h += line + space;
            h += HeightOf(nameProp)  + space;
            h += HeightOf(keyProp)   + space;
            h += HeightOf(groupProp) + space;
            h += HeightOf(descProp, true) + space;

            // Value section title
            h += line + space;
            h += HeightOf(typeProp) + space;

            // Default + optional range row
            SettingValueType t = (SettingValueType)typeProp.enumValueIndex;
            
            switch (t)
            {
                case SettingValueType.Bool:
                case SettingValueType.String:
                    h += line + space; // Default
                    break;
                    
                case SettingValueType.Int:
                case SettingValueType.Float:
                    h += line + space; // Default
                    h += line + space; // range row
                    break;
                    
                case SettingValueType.Button:
                    h += line + space; // section title
                    h += line + space; // buttonText
                    h += line + space; // buttonData
                    h += line + space; // buttonColor
                    h += line + space; // buttonSprite
                    break;
                    
                case SettingValueType.OptionPicker:
                    h += line + space; // section title
                    var optionsProp = property.FindPropertyRelative("options");
                    h += HeightOf(optionsProp, true) + space; // options list
                    h += line + space; // defaultOptionIndex
                    break;
            }

            // Apply section title
            h += line + space;
            h += HeightOf(applyProp) + space;

            ApplyTarget apply = (ApplyTarget)applyProp.enumValueIndex;
            if (apply == ApplyTarget.AudioMixerFloat01ToDb)
            {
                h += line + space; // mixer
                h += line + space; // param
                h += line + space; // db row
            }

            if (string.IsNullOrWhiteSpace(keyProp.stringValue))
                h += line * 1.4f + space;

            return h + 6f;
        }

        private static float HeightOf(SerializedProperty prop, bool includeChildren = false)
            => EditorGUI.GetPropertyHeight(prop, includeChildren);

        private static void DrawProp(ref Rect r, SerializedProperty prop, string label, bool includeChildren = false)
        {
            float space = EditorGUIUtility.standardVerticalSpacing;
            GUIContent gc = new(label);

            float h = EditorGUI.GetPropertyHeight(prop, gc, includeChildren);
            Rect rect = new(r.x, r.y, r.width, h);
            EditorGUI.PropertyField(rect, prop, gc, includeChildren);
            r.y += h + space;
        }

        private static void DrawSectionTitle(ref Rect r, string title)
        {
            float line = EditorGUIUtility.singleLineHeight;
            float space = EditorGUIUtility.standardVerticalSpacing;

            Rect rect = new(r.x, r.y, r.width, line);
            EditorGUI.LabelField(rect, title, EditorStyles.boldLabel);
            r.y += line + space;
        }

        private static void DrawMinMaxRow(ref Rect r, SerializedProperty leftProp, SerializedProperty rightProp, string leftLabel, string rightLabel)
        {
            float line = EditorGUIUtility.singleLineHeight;
            float space = EditorGUIUtility.standardVerticalSpacing;

            float gap = 10f;
            float half = (r.width - gap) * 0.5f;

            Rect left  = new(r.x, r.y, half, line);
            Rect right = new(r.x + half + gap, r.y, half, line);

            EditorGUI.PropertyField(left, leftProp, new GUIContent(leftLabel));
            EditorGUI.PropertyField(right, rightProp, new GUIContent(rightLabel));

            r.y += line + space;
        }

        private static string BuildHeader(string displayName, string key)
        {
            if (!string.IsNullOrWhiteSpace(displayName) && !string.IsNullOrWhiteSpace(key))
                return $"{displayName}  ({key})";
            if (!string.IsNullOrWhiteSpace(displayName)) return displayName;
            return !string.IsNullOrWhiteSpace(key) ? key : "Setting";
        }
    }
}
#endif