package net.minecraft.client.gui.screens.inventory.tooltip;

import net.fabricmc.api.EnvType;
import net.fabricmc.api.Environment;
import net.minecraft.client.gui.navigation.ScreenRectangle;
import net.minecraft.util.Mth;
import org.joml.Vector2i;
import org.joml.Vector2ic;

@Environment(EnvType.CLIENT)
public class MenuTooltipPositioner implements ClientTooltipPositioner {
	private static final int MARGIN = 5;
	private static final int MOUSE_OFFSET_X = 12;
	public static final int MAX_OVERLAP_WITH_WIDGET = 3;
	public static final int MAX_DISTANCE_TO_WIDGET = 5;
	private final ScreenRectangle screenRectangle;

	public MenuTooltipPositioner(ScreenRectangle screenRectangle) {
		this.screenRectangle = screenRectangle;
	}

	@Override
	public Vector2ic positionTooltip(int screenWidth, int screenHeight, int mouseX, int mouseY, int tooltipWidth, int tooltipHeight) {
		Vector2i vector2i = new Vector2i(mouseX + 12, mouseY);
		if (vector2i.x + tooltipWidth > screenWidth - 5) {
			vector2i.x = Math.max(mouseX - 12 - tooltipWidth, 9);
		}

		vector2i.y += 3;
		int i = tooltipHeight + 3 + 3;
		int j = this.screenRectangle.bottom() + 3 + getOffset(0, 0, this.screenRectangle.height());
		int k = screenHeight - 5;
		if (j + i <= k) {
			vector2i.y = vector2i.y + getOffset(vector2i.y, this.screenRectangle.top(), this.screenRectangle.height());
		} else {
			vector2i.y = vector2i.y - (i + getOffset(vector2i.y, this.screenRectangle.bottom(), this.screenRectangle.height()));
		}

		return vector2i;
	}

	private static int getOffset(int mouseY, int widgetY, int widgetHeight) {
		int i = Math.min(Math.abs(mouseY - widgetY), widgetHeight);
		return Math.round(Mth.lerp((float)i / widgetHeight, (float)(widgetHeight - 3), 5.0F));
	}
}