package net.minecraft.client.renderer.blockentity;

import com.mojang.blaze3d.vertex.PoseStack;
import java.util.List;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.Font;
import net.minecraft.client.gui.Font.DisplayMode;
import net.minecraft.client.player.LocalPlayer;
import net.minecraft.client.renderer.SubmitNodeCollector;
import net.minecraft.client.renderer.blockentity.BlockEntityRendererProvider.Context;
import net.minecraft.client.renderer.blockentity.state.SignRenderState;
import net.minecraft.client.renderer.feature.ModelFeatureRenderer.CrumblingOverlay;
import net.minecraft.client.renderer.state.level.CameraRenderState;
import net.minecraft.core.BlockPos;
import net.minecraft.util.ARGB;
import net.minecraft.util.FormattedCharSequence;
import net.minecraft.util.Mth;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.item.DyeColor;
import net.minecraft.world.level.block.entity.SignBlockEntity;
import net.minecraft.world.level.block.entity.SignText;
import net.minecraft.world.phys.Vec3;
import org.jspecify.annotations.Nullable;

public abstract class AbstractSignRenderer<S extends SignRenderState> implements BlockEntityRenderer<SignBlockEntity, S> {
	private static final int BLACK_TEXT_OUTLINE_COLOR = -988212;
	private static final int OUTLINE_RENDER_DISTANCE = Mth.square(16);
	private final Font font;

	public AbstractSignRenderer(final Context context) {
		this.font = context.font();
	}

	public void submit(final S state, final PoseStack poseStack, final SubmitNodeCollector submitNodeCollector, final CameraRenderState camera) {
		if (state.frontText != null) {
			poseStack.pushPose();
			poseStack.mulPose(state.transformations.frontText());
			this.submitSignText(state, poseStack, submitNodeCollector, state.frontText);
			poseStack.popPose();
		}

		if (state.backText != null) {
			poseStack.pushPose();
			poseStack.mulPose(state.transformations.backText());
			this.submitSignText(state, poseStack, submitNodeCollector, state.backText);
			poseStack.popPose();
		}
	}

	private void submitSignText(final S state, final PoseStack poseStack, final SubmitNodeCollector submitNodeCollector, final SignText signText) {
		int darkColor = getDarkColor(signText);
		int signMidpoint = 4 * state.textLineHeight / 2;
		FormattedCharSequence[] formattedLines = signText.getRenderMessages(state.isTextFilteringEnabled, input -> {
			List<FormattedCharSequence> components = this.font.split(input, state.maxTextLineWidth);
			return components.isEmpty() ? FormattedCharSequence.EMPTY : (FormattedCharSequence)components.get(0);
		});
		int textColor;
		boolean drawOutline;
		int lightVal;
		if (signText.hasGlowingText()) {
			textColor = signText.getColor().getTextColor();
			drawOutline = textColor == DyeColor.BLACK.getTextColor() || state.drawOutline;
			lightVal = 15728880;
		} else {
			textColor = darkColor;
			drawOutline = false;
			lightVal = state.lightCoords;
		}

		for (int i = 0; i < 4; i++) {
			FormattedCharSequence actualLine = formattedLines[i];
			float x1 = -this.font.width(actualLine) / 2;
			submitNodeCollector.submitText(
				poseStack, x1, i * state.textLineHeight - signMidpoint, actualLine, false, DisplayMode.POLYGON_OFFSET, lightVal, textColor, 0, drawOutline ? darkColor : 0
			);
		}
	}

	private static boolean isOutlineVisible(final BlockPos pos) {
		Minecraft minecraft = Minecraft.getInstance();
		LocalPlayer player = minecraft.player;
		if (player != null && minecraft.options.getCameraType().isFirstPerson() && player.isScoping()) {
			return true;
		} else {
			Entity camera = minecraft.getCameraEntity();
			return camera != null && camera.distanceToSqr(Vec3.atCenterOf(pos)) < OUTLINE_RENDER_DISTANCE;
		}
	}

	public static int getDarkColor(final SignText signText) {
		int color = signText.getColor().getTextColor();
		return color == DyeColor.BLACK.getTextColor() && signText.hasGlowingText() ? -988212 : ARGB.scaleRGB(color, 0.4F);
	}

	public void extractRenderState(
		final SignBlockEntity blockEntity, final S state, final float partialTicks, final Vec3 cameraPosition, @Nullable final CrumblingOverlay breakProgress
	) {
		BlockEntityRenderer.super.extractRenderState(blockEntity, state, partialTicks, cameraPosition, breakProgress);
		state.maxTextLineWidth = blockEntity.getMaxTextLineWidth();
		state.textLineHeight = blockEntity.getTextLineHeight();
		state.frontText = blockEntity.getFrontText();
		state.backText = blockEntity.getBackText();
		state.isTextFilteringEnabled = Minecraft.getInstance().isTextFilteringEnabled();
		state.drawOutline = isOutlineVisible(blockEntity.getBlockPos());
	}
}