package net.lax1dude.eaglercraft;

import static net.lax1dude.eaglercraft.adapter.EaglerAdapterImpl2.*;

import java.nio.IntBuffer;

import net.lax1dude.eaglercraft.adapter.EaglerAdapterImpl2.BufferArrayGL;
import net.minecraft.src.GLAllocation;

public class EarlyLoadScreen {

	public static final String loadScreen = "[encoded data, 15568 characters]";
	public static final String enableScreen = "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";

	private static BufferGL vbo = null;
	private static ProgramGL program = null;

	public static void paintScreen() {

		TextureGL tex = _wglGenTextures();
		_wglActiveTexture(_wGL_TEXTURE0);
		_wglBindTexture(_wGL_TEXTURE_2D, tex);
		_wglTexParameteri(_wGL_TEXTURE_2D, _wGL_TEXTURE_MAG_FILTER, _wGL_NEAREST);
		_wglTexParameteri(_wGL_TEXTURE_2D, _wGL_TEXTURE_MIN_FILTER, _wGL_NEAREST);
		_wglTexParameteri(_wGL_TEXTURE_2D, _wGL_TEXTURE_WRAP_S, _wGL_CLAMP);
		_wglTexParameteri(_wGL_TEXTURE_2D, _wGL_TEXTURE_WRAP_T, _wGL_CLAMP);
		EaglerImage img = EaglerImage.loadImage(Base64.decodeBase64(loadScreen));
		IntBuffer upload = GLAllocation.createDirectIntBuffer(192 * 192);
		upload.put(img.data);
		upload.flip();
		_wglTexImage2D(_wGL_TEXTURE_2D, 0, _wGL_RGBA, 192, 192, 0, _wGL_RGBA, _wGL_UNSIGNED_BYTE, upload);

		upload.clear();
		upload.put(Float.floatToIntBits(0.0f));
		upload.put(Float.floatToIntBits(0.0f));
		upload.put(Float.floatToIntBits(0.0f));
		upload.put(Float.floatToIntBits(1.0f));
		upload.put(Float.floatToIntBits(1.0f));
		upload.put(Float.floatToIntBits(0.0f));
		upload.put(Float.floatToIntBits(1.0f));
		upload.put(Float.floatToIntBits(0.0f));
		upload.put(Float.floatToIntBits(0.0f));
		upload.put(Float.floatToIntBits(1.0f));
		upload.put(Float.floatToIntBits(1.0f));
		upload.put(Float.floatToIntBits(1.0f));
		upload.flip();

		vbo = _wglCreateBuffer();
		_wglBindBuffer(_wGL_ARRAY_BUFFER, vbo);
		_wglBufferData0(_wGL_ARRAY_BUFFER, upload, _wGL_STATIC_DRAW);

		ShaderGL vert = _wglCreateShader(_wGL_VERTEX_SHADER);
		_wglShaderSource(vert, _wgetShaderHeader()
				+ "\nprecision lowp float; in vec2 a_pos; out vec2 v_pos; void main() { gl_Position = vec4(((v_pos = a_pos) - 0.5) * vec2(2.0, -2.0), 0.0, 1.0); }");
		_wglCompileShader(vert);

		ShaderGL frag = _wglCreateShader(_wGL_FRAGMENT_SHADER);
		_wglShaderSource(frag, _wgetShaderHeader()
				+ "\nprecision lowp float; in vec2 v_pos; out vec4 fragColor; uniform sampler2D tex; uniform vec2 aspect; void main() { fragColor = vec4(texture(tex, clamp(v_pos * aspect - ((aspect - 1.0) * 0.5), 0.02, 0.98)).rgb, 1.0); }");
		_wglCompileShader(frag);

		program = _wglCreateProgram();

		_wglAttachShader(program, vert);
		_wglAttachShader(program, frag);
		_wglBindAttributeLocation(program, 0, "a_pos");
		_wglLinkProgram(program);
		_wglDetachShader(program, vert);
		_wglDetachShader(program, frag);
		_wglDeleteShader(vert);
		_wglDeleteShader(frag);

		try {
			Thread.sleep(50l);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}

		_wglUseProgram(program);
		_wglUniform1i(_wglGetUniformLocation(program, "tex"), 0);

		int width = getCanvasWidth();
		int height = getCanvasHeight();
		float x, y;
		if (width > height) {
			x = (float) width / (float) height;
			y = 1.0f;
		} else {
			x = 1.0f;
			y = (float) height / (float) width;
		}

		_wglActiveTexture(_wGL_TEXTURE0);
		_wglBindTexture(_wGL_TEXTURE_2D, tex);

		_wglViewport(0, 0, width, height);
		_wglClearColor(1.0f, 1.0f, 1.0f, 1.0f);
		_wglClear(_wGL_COLOR_BUFFER_BIT | _wGL_DEPTH_BUFFER_BIT);

		_wglUniform2f(_wglGetUniformLocation(program, "aspect"), x, y);

		BufferArrayGL vao = _wglCreateVertexArray();
		_wglBindVertexArray(vao);
		_wglEnableVertexAttribArray(0);
		_wglVertexAttribPointer(0, 2, _wGL_FLOAT, false, 8, 0);
		_wglDrawArrays(_wGL_TRIANGLES, 0, 6);
		_wglDisableVertexAttribArray(0);
		_wglFlush();
		updateDisplay();

		_wglUseProgram(null);
		_wglBindBuffer(_wGL_ARRAY_BUFFER, null);
		_wglBindTexture(_wGL_TEXTURE_2D, null);
		_wglDeleteTextures(tex);
		_wglDeleteVertexArray(vao);
	}

	public static void paintEnable() {

		TextureGL tex = _wglGenTextures();
		_wglActiveTexture(_wGL_TEXTURE0);
		_wglBindTexture(_wGL_TEXTURE_2D, tex);
		_wglTexParameteri(_wGL_TEXTURE_2D, _wGL_TEXTURE_MAG_FILTER, _wGL_NEAREST);
		_wglTexParameteri(_wGL_TEXTURE_2D, _wGL_TEXTURE_MIN_FILTER, _wGL_NEAREST);
		_wglTexParameteri(_wGL_TEXTURE_2D, _wGL_TEXTURE_WRAP_S, _wGL_CLAMP);
		_wglTexParameteri(_wGL_TEXTURE_2D, _wGL_TEXTURE_WRAP_T, _wGL_CLAMP);
		EaglerImage img = EaglerImage.loadImage(Base64.decodeBase64(enableScreen));
		IntBuffer upload = GLAllocation.createDirectIntBuffer(128 * 128);
		upload.put(img.data);
		upload.flip();
		_wglTexImage2D(_wGL_TEXTURE_2D, 0, _wGL_RGBA, 128, 128, 0, _wGL_RGBA, _wGL_UNSIGNED_BYTE, upload);

		try {
			Thread.sleep(50l);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}

		_wglUseProgram(program);

		int width = getCanvasWidth();
		int height = getCanvasHeight();
		float x, y;
		if (width > height) {
			x = (float) width / (float) height;
			y = 1.0f;
		} else {
			x = 1.0f;
			y = (float) height / (float) width;
		}

		_wglActiveTexture(_wGL_TEXTURE0);
		_wglBindTexture(_wGL_TEXTURE_2D, tex);

		_wglViewport(0, 0, width, height);
		_wglClearColor(1.0f, 1.0f, 1.0f, 1.0f);
		_wglClear(_wGL_COLOR_BUFFER_BIT | _wGL_DEPTH_BUFFER_BIT);

		_wglUniform2f(_wglGetUniformLocation(program, "aspect"), x, y);

		BufferArrayGL vao = _wglCreateVertexArray();
		_wglBindVertexArray(vao);
		_wglBindBuffer(_wGL_ARRAY_BUFFER, vbo);
		_wglEnableVertexAttribArray(0);
		_wglVertexAttribPointer(0, 2, _wGL_FLOAT, false, 8, 0);
		_wglDrawArrays(_wGL_TRIANGLES, 0, 6);
		_wglDisableVertexAttribArray(0);
		_wglFlush();
		updateDisplay();

		_wglUseProgram(null);
		_wglBindBuffer(_wGL_ARRAY_BUFFER, null);
		_wglBindTexture(_wGL_TEXTURE_2D, null);
		_wglDeleteTextures(tex);
		_wglDeleteVertexArray(vao);

	}

}
