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

[CustomEditor(typeof(IsoMap))]
public class IsoEditor : Editor {

    public TerrainType terrain = TerrainType.grass;
    public int height = 16;

    IsoTile activeTile;
    IsoTile lastTile;

    bool dragging = false;
    Color hilightColor = new Color(.8f, .8f, .8f, 1f);

    IsoMap node;

    private void OnEnable()
    {
        node = (IsoMap)target;
    }

    void OnSceneGUI()
    {
        if (node == null) node = (IsoMap)target;

        if (Event.current.type == EventType.MouseMove || dragging)
        {
            RaycastHit2D hit = Physics2D.Raycast(Camera.current.ScreenToWorldPoint(HandleUtility.GUIPointToScreenPixelCoordinate(Event.current.mousePosition)), -Vector2.up);
            if (hit)
            {
                IsoTile tile = hit.transform.GetComponent<IsoTile>();
                if(tile != null && tile.transform.parent == node.transform)
                {
                    activeTile = tile;
                    if (!dragging) {
                        tile.rend.color = hilightColor;
                        tile.GroundRenderer.color = hilightColor;
                        //tile.rend.sortingOrder = 1;
                        //tile.GroundRenderer.sortingOrder = 1;
                        if (lastTile != null && lastTile != activeTile)
                        {
                            lastTile.rend.color = Color.white;
                            lastTile.GroundRenderer.color = Color.white;
                            //lastTile.rend.sortingOrder = 0;
                            //lastTile.GroundRenderer.sortingOrder = 0;
                        }
                        height = (int)tile.height;
                    }

                }
            }
        }
        if(Event.current.type == EventType.ScrollWheel)
        {
            height -= (int)Mathf.Sign(Event.current.delta.y)*4;
            height = Mathf.Max(height,8);
            Event.current.Use();

            if(activeTile != null)
            {
                activeTile.height = height;
            }
        }
        if(Event.current.type == EventType.MouseDown)
        {
            dragging = true;
            Debug.Log("DRAG START");
            PlaceTile();
            GUIUtility.hotControl = GUIUtility.GetControlID(FocusType.Passive);

        }
        if (dragging)
        {
            if (activeTile != lastTile)
            {
                PlaceTile();
            }
            if (Event.current.type == EventType.MouseUp)
            {
                Debug.Log("DRAG STOP");
                dragging = false;
            }
        }
        lastTile = activeTile;
    }
    public void PlaceTile()
    {
        if (node == null) node = (IsoMap)target;
        IsoTile newTile = Instantiate(node.Tiles[(int)terrain], node.transform);
        newTile.transform.position = activeTile.transform.position;
        newTile.location = activeTile.location;

        if (!dragging) newTile.height = activeTile.height;
        else newTile.height = height;

        node.grid[(int)newTile.location.x, (int)newTile.location.y] = newTile;
        newTile.name = "Tile" + newTile.location.x.ToString() + "-" + newTile.location.y.ToString();
        DestroyImmediate(activeTile.gameObject);
        activeTile = newTile;
    }
    public override void OnInspectorGUI()
    {
        base.OnInspectorGUI();

        GUILayout.BeginHorizontal();
        GUILayout.Label("TerrainType");
        terrain = (TerrainType)EditorGUILayout.EnumPopup(terrain);
        GUILayout.EndHorizontal();

        GUILayout.BeginHorizontal();
        if (GUILayout.Button("Clear"))
        {
            node.Clear();
        }

        if (GUILayout.Button("ClearHeights"))
        {
            foreach(IsoTile tile in node.grid)
            {
                tile.ClearAllHeights();
            }
        }

        if(GUILayout.Button("Check"))
        {
            node.CheckTiles();
        }
        GUILayout.EndHorizontal();
    }

    public enum TerrainType
    {
        empty,
        grass,
        dirt,
        stone,
        wood,
        water
    }


}