package rosegoldaddons.utils;

import net.minecraft.client.Minecraft;
import net.minecraft.client.model.ModelBase;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.client.renderer.OpenGlHelper;
import net.minecraft.client.shader.Framebuffer;
import net.minecraft.entity.EntityLivingBase;
import org.lwjgl.opengl.EXTFramebufferObject;
import org.lwjgl.opengl.EXTPackedDepthStencil;
import rosegoldaddons.events.RenderLivingEntityEvent;

import java.awt.*;

import static org.lwjgl.opengl.GL11.*;

public class OutlineUtils {

    public static void outlineESP(EntityLivingBase entity, float p_77036_2_, float p_77036_3_, float p_77036_4_, float p_77036_5_, float p_77036_6_, float scaleFactor, ModelBase modelBase, Color color) {
        Minecraft mc = Minecraft.getMinecraft();
        boolean fancyGraphics = mc.gameSettings.fancyGraphics;
        float gamma = mc.gameSettings.gammaSetting;
        mc.gameSettings.fancyGraphics = false;
        mc.gameSettings.gammaSetting = 100000F;

        GlStateManager.resetColor();
        setColor(color);
        renderOne(2);
        modelBase.render(entity, p_77036_2_, p_77036_3_, p_77036_4_, p_77036_5_, p_77036_6_, scaleFactor);
        setColor(color);
        renderTwo();
        modelBase.render(entity, p_77036_2_, p_77036_3_, p_77036_4_, p_77036_5_, p_77036_6_, scaleFactor);
        setColor(color);
        renderThree();
        modelBase.render(entity, p_77036_2_, p_77036_3_, p_77036_4_, p_77036_5_, p_77036_6_, scaleFactor);
        setColor(color);
        renderFour(color);
        modelBase.render(entity, p_77036_2_, p_77036_3_, p_77036_4_, p_77036_5_, p_77036_6_, scaleFactor);
        setColor(color);
        renderFive();
        setColor(Color.WHITE);

        mc.gameSettings.fancyGraphics = fancyGraphics;
        mc.gameSettings.gammaSetting = gamma;
    }

    public static void outlineESP(RenderLivingEntityEvent event, Color color) {
        Minecraft mc = Minecraft.getMinecraft();
        boolean fancyGraphics = mc.gameSettings.fancyGraphics;
        float gamma = mc.gameSettings.gammaSetting;
        mc.gameSettings.fancyGraphics = false;
        mc.gameSettings.gammaSetting = 100000F;

        GlStateManager.resetColor();
        setColor(color);
        renderOne(2);
        event.modelBase.render(event.entity, event.p_77036_2_, event.p_77036_3_, event.p_77036_4_, event.p_77036_5_, event.p_77036_6_, event.scaleFactor);
        setColor(color);
        renderTwo();
        event.modelBase.render(event.entity, event.p_77036_2_, event.p_77036_3_, event.p_77036_4_, event.p_77036_5_, event.p_77036_6_, event.scaleFactor);
        setColor(color);
        renderThree();
        event.modelBase.render(event.entity, event.p_77036_2_, event.p_77036_3_, event.p_77036_4_, event.p_77036_5_, event.p_77036_6_, event.scaleFactor);
        setColor(color);
        renderFour(color);
        event.modelBase.render(event.entity, event.p_77036_2_, event.p_77036_3_, event.p_77036_4_, event.p_77036_5_, event.p_77036_6_, event.scaleFactor);
        setColor(color);
        renderFive();
        setColor(Color.WHITE);

        mc.gameSettings.fancyGraphics = fancyGraphics;
        mc.gameSettings.gammaSetting = gamma;
    }

    public static void renderOne(final float lineWidth) {
        checkSetupFBO();
        glPushAttrib(GL_ALL_ATTRIB_BITS);
        glDisable(GL_ALPHA_TEST);
        glDisable(GL_TEXTURE_2D);
        glDisable(GL_LIGHTING);
        glEnable(GL_BLEND);
        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
        glLineWidth(lineWidth);
        glEnable(GL_LINE_SMOOTH);
        glEnable(GL_STENCIL_TEST);
        glClear(GL_STENCIL_BUFFER_BIT);
        glClearStencil(0xF);
        glStencilFunc(GL_NEVER, 1, 0xF);
        glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
        glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
    }

    public static void renderTwo() {
        glStencilFunc(GL_NEVER, 0, 0xF);
        glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
        glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
    }

    public static void renderThree() {
        glStencilFunc(GL_EQUAL, 1, 0xF);
        glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
        glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
    }

    public static void renderFour(final Color color) {
        setColor(color);
        glDepthMask(false);
        glDisable(GL_DEPTH_TEST);
        glEnable(GL_POLYGON_OFFSET_LINE);
        glPolygonOffset(1.0F, -2000000F);
        OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, 240.0F, 240.0F);
    }

    public static void renderFive() {
        glPolygonOffset(1.0F, 2000000F);
        glDisable(GL_POLYGON_OFFSET_LINE);
        glEnable(GL_DEPTH_TEST);
        glDepthMask(true);
        glDisable(GL_STENCIL_TEST);
        glDisable(GL_LINE_SMOOTH);
        glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
        glEnable(GL_BLEND);
        glEnable(GL_LIGHTING);
        glEnable(GL_TEXTURE_2D);
        glEnable(GL_ALPHA_TEST);
        glPopAttrib();
    }

    public static void setColor(final Color color) {
        glColor4d(color.getRed() / 255F, color.getGreen() / 255F, color.getBlue() / 255F, color.getAlpha() / 255F);
    }

    public static void checkSetupFBO() {
        final Framebuffer fbo = Minecraft.getMinecraft().getFramebuffer();
        if (fbo != null) {
            if (fbo.depthBuffer > -1) {
                setupFBO(fbo);
                fbo.depthBuffer = -1;
            }
        }
    }

    private static void setupFBO(final Framebuffer fbo) {
        EXTFramebufferObject.glDeleteRenderbuffersEXT(fbo.depthBuffer);
        final int stencil_depth_buffer_ID = EXTFramebufferObject.glGenRenderbuffersEXT();
        EXTFramebufferObject.glBindRenderbufferEXT(EXTFramebufferObject.GL_RENDERBUFFER_EXT, stencil_depth_buffer_ID);
        EXTFramebufferObject.glRenderbufferStorageEXT(EXTFramebufferObject.GL_RENDERBUFFER_EXT, EXTPackedDepthStencil.GL_DEPTH_STENCIL_EXT, Minecraft.getMinecraft().displayWidth, Minecraft.getMinecraft().displayHeight);
        EXTFramebufferObject.glFramebufferRenderbufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT, EXTFramebufferObject.GL_STENCIL_ATTACHMENT_EXT, EXTFramebufferObject.GL_RENDERBUFFER_EXT, stencil_depth_buffer_ID);
        EXTFramebufferObject.glFramebufferRenderbufferEXT(EXTFramebufferObject.GL_FRAMEBUFFER_EXT, EXTFramebufferObject.GL_DEPTH_ATTACHMENT_EXT, EXTFramebufferObject.GL_RENDERBUFFER_EXT, stencil_depth_buffer_ID);
    }

}