using UnityEditor;
using UnityEngine;

namespace StylizedWater2
{
    [CustomEditor(typeof(WaterGrid))]
    public class CreateWaterGridInspector : Editor
    {
        private WaterGrid script;

        private SerializedProperty material;
        private SerializedProperty followSceneCamera;
        private SerializedProperty autoAssignCamera;
        private SerializedProperty followTarget;
        
        private SerializedProperty scale;
        private SerializedProperty vertexDistance;
        private SerializedProperty rowsColumns;
        
        private int vertexCount;

        private void OnEnable()
        {
            script = (WaterGrid) target;
            script.m_rowsColumns = script.rowsColumns;

            material = serializedObject.FindProperty("material");
            followSceneCamera = serializedObject.FindProperty("followSceneCamera");
            autoAssignCamera = serializedObject.FindProperty("autoAssignCamera");
            followTarget = serializedObject.FindProperty("followTarget");
            
            scale = serializedObject.FindProperty("scale");
            vertexDistance = serializedObject.FindProperty("vertexDistance");
            rowsColumns = serializedObject.FindProperty("rowsColumns");
        }
        
        public override void OnInspectorGUI()
        {
            UI.DrawHeader();

            using (new EditorGUILayout.HorizontalScope())
            {
                GUILayout.Space(EditorGUIUtility.labelWidth);
                WaterGrid.DisplayGrid = GUILayout.Toggle(WaterGrid.DisplayGrid , new GUIContent("  Display Grid", EditorGUIUtility.IconContent((WaterGrid.DisplayGrid ? "animationvisibilitytoggleon" : "animationvisibilitytoggleoff")).image), "Button");
                WaterGrid.DisplayWireframe = GUILayout.Toggle(WaterGrid.DisplayWireframe, new GUIContent("  Show Wireframe", EditorGUIUtility.IconContent((WaterGrid.DisplayWireframe ? "animationvisibilitytoggleon" : "animationvisibilitytoggleoff")).image), "Button");
            }
            
            serializedObject.Update();
            EditorGUI.BeginChangeCheck();

            EditorGUILayout.LabelField("Appearance", EditorStyles.boldLabel);
            EditorGUILayout.PropertyField(material);
            if(material.objectReferenceValue == null) EditorGUILayout.HelpBox("A material must be assigned", MessageType.Error);
            
            EditorGUILayout.Space();
            
            EditorGUILayout.LabelField("Movement", EditorStyles.boldLabel);

            EditorGUILayout.PropertyField(followSceneCamera);
            using (new EditorGUI.DisabledScope(autoAssignCamera.boolValue))
            {
                EditorGUILayout.PropertyField(followTarget);
            }
            EditorGUI.indentLevel++;
            EditorGUILayout.PropertyField(autoAssignCamera);
            EditorGUI.indentLevel--;
            
            EditorGUILayout.Space();

            EditorGUILayout.LabelField("Grid geometry", EditorStyles.boldLabel);

            EditorGUILayout.PropertyField(scale);
            EditorGUILayout.PropertyField(vertexDistance);
            vertexCount = Mathf.FloorToInt(((scale.floatValue / rowsColumns.intValue) / vertexDistance.floatValue) * ((scale.floatValue / rowsColumns.intValue) / vertexDistance.floatValue));
            if(vertexCount > 65535)
            {
                EditorGUILayout.HelpBox("Vertex count of individual tiles is too high. Increase the vertex distance, decrease the grid scale, or add more rows/columns", MessageType.Error);
            }
            EditorGUILayout.PropertyField(rowsColumns);

            if (EditorGUI.EndChangeCheck())
            {
                serializedObject.ApplyModifiedProperties();
                
                //Executed here since objects can't be destroyed from OnValidate
                script.Recreate();
            }
            
            UI.DrawFooter();
        }
    }
}