using Godot;
using System;

public partial class Map : PanelContainer
{
	[Export] GridContainer grid;
	// Called when the node enters the scene tree for the first time.
	public override void _Ready()
	{
	}

	// Called every frame. 'delta' is the elapsed time since the previous frame.
	public override void _Process(double delta)
	{
		//TODO: This has to be temporary! Drawing each frame is way too expensive.
		if (Visible)
		{
			ShowMap();
		}
	}

	public void ShowMap()
	{
		grid.Columns = GameData.layerSize;
		grid.AddThemeConstantOverride("h_separation", (int)(GameData.tileWidth * 2.5f));
		grid.AddThemeConstantOverride("v_separation", (int)(GameData.tileWidth * 2.5f));
		foreach (Node node in grid.GetChildren())
		{
			grid.RemoveChild(node);
			node.QueueFree();
		}
		TextureRect texture;
		Tile[,] tiles = GameData.map[GameData.currentLayer].tiles;
		for (int z = 0; z < GameData.layerSize; z++)
		{
			for (int x = 0; x < GameData.layerSize; x++)
			{
				texture = new TextureRect();
				if (tiles[x, z].wasVisited)
				{
					if (tiles[x, z].containsResource)
					{
						texture.Texture = ResourceDistributor.resources[tiles[x, z].resource.name];
					}
					else
					{
						texture.Texture = GenerateTexture(32, new Color(0,0,0,0));
					}
				}
				else
				{
					texture.Texture = GenerateTexture(32, new Color(0,0,0,1));
				}

				grid.AddChild(texture);

			}
		}
	}

	public Texture2D GenerateTexture(int size, Color fillColor)
	{

		Image image = Image.CreateEmpty(size, size, false, Image.Format.Rgba8);

		image.Fill(fillColor);

		return ImageTexture.CreateFromImage(image);
	}
}