using UnityEngine;
using System.Collections;

public class MapDisplay : MonoBehaviour {

	public Renderer textureRender;
	public MeshFilter meshFilter;
	public MeshRenderer meshRenderer;

	public void DrawTexture(Texture2D texture) {
		textureRender.sharedMaterial.mainTexture = texture;
		textureRender.transform.localScale = new Vector3 (texture.width, 1, texture.height);
	}

	public void DrawMesh(MeshData meshData) {
		meshFilter.sharedMesh = meshData.CreateMesh ();

		meshFilter.transform.localScale = Vector3.one * FindFirstObjectByType<MapGenerator> ().terrainData.uniformScale;

        ApplyVertexColors(meshFilter.sharedMesh);
    }

    void ApplyVertexColors(Mesh mesh)
    {
        Vector3[] vertices = mesh.vertices;
        Color[] colors = new Color[vertices.Length];

        float maxH = 25f;

        for (int i = 0; i < vertices.Length; i++)
        {
            
            float heightPercent = Mathf.InverseLerp(0, maxH, vertices[i].y);

            // --- THE BIOME LAYERS ---
            if (heightPercent < 0.05f)
            {
                colors[i] = new Color(0.1f, 0.3f, 0.6f); // Deep Water (Dark Blue)
            }
            else if (heightPercent < 0.12f)
            {
                colors[i] = new Color(0.9f, 0.8f, 0.6f); // Sand/Beach (Tan)
            }
            else if (heightPercent < 0.45f)
            {
                colors[i] = new Color(0.2f, 0.5f, 0.1f); // Grass (Rich Green)
            }
            else if (heightPercent < 0.65f)
            {
                colors[i] = new Color(0.4f, 0.35f, 0.3f); // Rock Color 1 (Brown-Grey)
            }
            else if (heightPercent < 0.85f)
            {
                colors[i] = new Color(0.3f, 0.3f, 0.3f); // Rock Color 2 (Dark Grey)
            }
            else
            {
                colors[i] = Color.white; // Snow (White)
            }
        }

        mesh.colors = colors;
    }

}