using Godot;
using System.Collections.Generic;

namespace IslaApocalypse.Core
{
	public static class BlockRegistry
	{
		// A dictionary holding all the block types in the game, searchable by their byte ID
		public static readonly Dictionary<byte, BlockData> Blocks = new Dictionary<byte, BlockData>();

		// Hardcoded IDs for easy reference in code
		public const byte AIR = 0;
		public const byte BEDROCK = 1;
		public const byte STONE = 2;
		public const byte DIRT = 3;
		public const byte SAND = 4;
		public const byte GRASS_TROPICAL = 5;
		public const byte GRASS_JUNGLE = 6;
		public const byte GRASS_PARADISE = 7;
		public const byte SNOW = 8;
		public const byte WASTELAND_DIRT = 9;
		public const byte ASPHALT = 10; // For our roads!

		// Water (terrain-water task 13). Wire-safe to add: block IDs are NEVER
		// serialized — the blueprint's section table (BLUEPRINT_FORMAT.md) stores
		// heights, biome ordinals and water data, never block IDs, and chunks are
		// not persisted yet. So this ID is a runtime-only value and appending to
		// the table cannot invalidate a .dat.
		//
		// NOTE this block is not placed into ChunkData.BlockIDs by the terrain
		// path. Terrain is a Marching-Cubes iso-surface over a density field, and
		// writing WATER into that field would FUSE the water into the terrain
		// surface rather than lay a sheet on top of it. Water is its own mesh
		// (ChunkRenderer). The entry exists so water has a real identity in the
		// registry — a name and a colour — for the renderer and for whatever
		// later needs to ask "what is this".
		public const byte WATER = 11;

		// This static constructor runs automatically the first time the registry is accessed
		static BlockRegistry()
		{
			// ID 0 is ALWAYS Air in voxel engines.
			Blocks.Add(AIR, new BlockData(AIR, "Air", false, Colors.Transparent));
			
			// The Foundation Blocks
			Blocks.Add(BEDROCK, new BlockData(BEDROCK, "Bedrock", true, new Color(0.1f, 0.1f, 0.1f)));
			Blocks.Add(STONE, new BlockData(STONE, "Stone", true, new Color(0.5f, 0.5f, 0.5f)));
			Blocks.Add(DIRT, new BlockData(DIRT, "Dirt", true, new Color(0.4f, 0.3f, 0.2f)));
			Blocks.Add(SAND, new BlockData(SAND, "Sand", true, new Color(0.8f, 0.7f, 0.4f)));
			
			// The Biome Surface Blocks
			Blocks.Add(GRASS_TROPICAL, new BlockData(GRASS_TROPICAL, "Tropical Grass", true, new Color(0.2f, 0.6f, 0.2f)));
			Blocks.Add(GRASS_JUNGLE, new BlockData(GRASS_JUNGLE, "Jungle Grass", true, new Color(0.1f, 0.4f, 0.1f)));
			Blocks.Add(GRASS_PARADISE, new BlockData(GRASS_PARADISE, "Paradise Grass", true, new Color(0.4f, 0.8f, 0.4f)));
			Blocks.Add(SNOW, new BlockData(SNOW, "Snow", true, new Color(0.9f, 0.9f, 0.9f)));
			Blocks.Add(WASTELAND_DIRT, new BlockData(WASTELAND_DIRT, "Wasteland Dirt", true, new Color(0.5f, 0.2f, 0.5f)));
			
			// Infrastructure
			Blocks.Add(ASPHALT, new BlockData(ASPHALT, "Asphalt", true, new Color(0.15f, 0.15f, 0.15f)));

			// Water — not solid (you can move through it), shallow-water colour as the
			// registry's representative value; the renderer shades by depth from there.
			Blocks.Add(WATER, new BlockData(WATER, "Water", false, new Color(0.24f, 0.55f, 0.62f)));
		}

		public static BlockData GetBlock(byte id)
		{
			if (Blocks.TryGetValue(id, out BlockData data)) return data;
			return Blocks[AIR]; // Safe fallback so the game doesn't crash if an ID is missing
		}
	}
}