using UnityEngine;
using UnityEditor;
using System;

namespace UNEC {
    public static class NodeEditorResources {

        public static Texture2D gridTexture { get { return _gridTexture != null ? _gridTexture : _gridTexture = GenerateGridTexture(); } }
        private static Texture2D _gridTexture;
        public static Texture2D crossTexture { get { return _crossTexture != null ? _crossTexture : _crossTexture = GenerateCrossTexture(); } }
        private static Texture2D _crossTexture;


        private static Color backgroundColor = new Color(0.18f, 0.18f, 0.18f);
        private static Color veinColor = new Color(0.25f, 0.25f, 0.25f);
        private static Color arteryColor = new Color(0.34f, 0.34f, 0.34f);
        private static Color crossColor = new Color(0.45f, 0.45f, 0.45f);

        public static Styles styles = new Styles();

        public class Styles {
            GUIStyle inputInt, inputString, inputFloat, inputObject, inputTexture, inputColor;
            GUIStyle outputInt, outputString, outputFloat, outputObject, outputTexture, outputColor;

            public Styles() {
                inputObject = new GUIStyle((GUIStyle)"flow shader in 0");
                inputString = new GUIStyle((GUIStyle)"flow shader in 1");
                inputInt = new GUIStyle((GUIStyle)"flow shader in 2");
                inputFloat = new GUIStyle((GUIStyle)"flow shader in 3");
                inputColor = new GUIStyle((GUIStyle)"flow shader in 4");
                inputTexture = new GUIStyle((GUIStyle)"flow shader in 5");
                outputObject = new GUIStyle((GUIStyle)"flow shader out 0");
                outputString = new GUIStyle((GUIStyle)"flow shader out 1");
                outputInt = new GUIStyle((GUIStyle)"flow shader out 2");
                outputFloat = new GUIStyle((GUIStyle)"flow shader out 3");
                outputColor = new GUIStyle((GUIStyle)"flow shader out 4");
                outputTexture = new GUIStyle((GUIStyle)"flow shader out 5");

                foreach (GUIStyle style in new GUIStyle[] { inputInt, inputString, inputFloat, inputObject, inputTexture, inputColor, outputInt, outputString, outputFloat, outputObject, outputTexture, outputColor }) {
                    style.normal.textColor = Color.black;
                    style.fixedHeight = 18;
                    style.alignment = TextAnchor.MiddleLeft;
                    style.onHover.textColor = Color.red;
                }
            }

            public GUIStyle GetInputStyle(Type type) {
                if (type == typeof(int)) return inputInt;
                else if (type == typeof(string)) return inputString;
                else if (type == typeof(Texture2D)) return inputTexture;
                else if (type == typeof(float)) return inputFloat;
                else if (type == typeof(Color)) return inputColor;
                else return inputObject;
            }

            public GUIStyle GetOutputStyle(Type type) {
                if (type == typeof(int)) return outputInt;
                else if (type == typeof(string)) return outputString;
                else if (type == typeof(Texture2D)) return outputTexture;
                else if (type == typeof(float)) return outputFloat;
                else if (type == typeof(Color)) return outputColor;
                else return outputObject;
            }
        }

        public static Texture2D GenerateGridTexture() {
            Texture2D tex = new Texture2D(64,64);
            Color[] cols = new Color[64 * 64];
            for (int y = 0; y < 64; y++) {
                for (int x = 0; x < 64; x++) {
                    Color col = backgroundColor;
                    if (y % 16 == 0 || x % 16 == 0) col = veinColor;
                    if (y == 63 || x == 63) col = arteryColor;
                    cols[(y * 64) + x] = col;
                }
            }
            tex.SetPixels(cols);
            tex.wrapMode = TextureWrapMode.Repeat;
            tex.filterMode = FilterMode.Bilinear;
            tex.name = "Grid";
            tex.Apply();
            return tex;
        }

        public static Texture2D GenerateCrossTexture() {
            Texture2D tex = new Texture2D(64, 64);
            Color[] cols = new Color[64 * 64];
            for (int y = 0; y < 64; y++) {
                for (int x = 0; x < 64; x++) {
                    Color col = crossColor;
                    if (y != 31 && x != 31) col.a = 0;
                    cols[(y * 64) + x] = col;
                }
            }
            tex.SetPixels(cols);
            tex.wrapMode = TextureWrapMode.Clamp;
            tex.filterMode = FilterMode.Bilinear;
            tex.name = "Grid";
            tex.Apply();
            return tex;
        }
    }
}