using UnityEditor;
using UnityEngine;

namespace CreatureControl {

    public class Leg_Editor {

        private static bool showfield = false;

        public static bool Inspector(SerializedProperty legProp, TargetLeg targetLeg, Leg leg) {
            bool anythingChanged = false;

            GUIStyle foldoutStyle = new(EditorStyles.foldout) {
                margin = EditorStyles.objectField.margin
            };

            EditorGUILayout.BeginHorizontal();
            string legName = ConvertCamelCase(legProp.name);
            showfield = EditorGUILayout.Foldout(showfield, legName, true, foldoutStyle);
            SerializedProperty femurProp = legProp.FindPropertyRelative(nameof(Leg.femur));
            SerializedProperty tibiaProp = legProp.FindPropertyRelative(nameof(Leg.tibia));
            SerializedProperty tarsusProp = legProp.FindPropertyRelative(nameof(Leg.tarsus));

            Transform newFemur = (Transform)EditorGUILayout.ObjectField(femurProp.objectReferenceValue, typeof(Transform), true);
            if (newFemur != femurProp.objectReferenceValue) {
                // Try to determine further bones when the femur has been updated
                femurProp.objectReferenceValue = newFemur;
                if (newFemur != null) {
                    if (tibiaProp.objectReferenceValue == null && newFemur.childCount == 1)
                        tibiaProp.objectReferenceValue = newFemur.GetChild(0);
                    Transform tibia = (Transform)tibiaProp.objectReferenceValue;
                    if (tibia != null) {
                        if (tarsusProp.objectReferenceValue == null && tibia.childCount == 1)
                            tarsusProp.objectReferenceValue = tibia.GetChild(0);
                    }
                }
                anythingChanged = true;
            }
            EditorGUILayout.EndHorizontal();

            if (femurProp.objectReferenceValue != null && tibiaProp.objectReferenceValue == null)
                showfield = true;

            if (showfield) {
                EditorGUI.indentLevel++;
                tibiaProp.objectReferenceValue = (Transform)EditorGUILayout.ObjectField("Lower Leg", tibiaProp.objectReferenceValue, typeof(Transform), true);
                tarsusProp.objectReferenceValue = (Transform)EditorGUILayout.ObjectField("Foot", tarsusProp.objectReferenceValue, typeof(Transform), true);
                // Need to check if anythingChanged and update the projection if it did
                EditorGUI.indentLevel--;
            }
            return anythingChanged;
        }

        private static string ConvertCamelCase(string text) {
            if (string.IsNullOrEmpty(text))
                return text;

            System.Text.StringBuilder result = new();

            for (int i = 0; i < text.Length; i++) {
                // Add a space before uppercase characters
                if (char.IsUpper(text[i]) && i > 0)
                    result.Append(' ');

                // Add the character to the result
                result.Append(text[i]);
            }

            // Capitalize the first character of the result
            if (result.Length > 0)
                result[0] = char.ToUpper(result[0]);

            return result.ToString();
        }
    }

}