ActuallyAdditions/src/main/java/de/ellpeck/actuallyadditions/common/inventory/gui/FluidDisplay.java

package de.ellpeck.actuallyadditions.common.inventory.gui;

import java.text.NumberFormat;
import java.util.Collections;

import de.ellpeck.actuallyadditions.common.util.AssetUtil;
import de.ellpeck.actuallyadditions.common.util.StringUtil;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.Gui;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.fluids.Fluid;
import net.minecraftforge.fluids.FluidStack;
import net.minecraftforge.fluids.FluidTank;
import net.minecraftforge.fml.client.config.GuiUtils;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

@SideOnly(Side.CLIENT)
public class FluidDisplay extends Gui {

    private FluidTank fluidReference;
    private Fluid oldFluid;

    private int x;
    private int y;
    private boolean outline;

    private ResourceLocation resLoc;

    private boolean drawTextNextTo;

    public FluidDisplay(int x, int y, FluidTank fluidReference, boolean outline, boolean drawTextNextTo) {
        this.setData(x, y, fluidReference, outline, drawTextNextTo);
    }

    public FluidDisplay(int x, int y, FluidTank fluidReference) {
        this(x, y, fluidReference, false, false);
    }

    public void setData(int x, int y, FluidTank fluidReference, boolean outline, boolean drawTextNextTo) {
        this.x = x;
        this.y = y;
        this.fluidReference = fluidReference;
        this.outline = outline;
        this.drawTextNextTo = drawTextNextTo;
    }

    public void draw() {
        Minecraft mc = Minecraft.getMinecraft();
        mc.getTextureManager().bindTexture(AssetUtil.GUI_INVENTORY_LOCATION);

        int barX = this.x;
        int barY = this.y;

        if (this.outline) {
            this.drawTexturedModalRect(this.x, this.y, 52, 163, 26, 93);

            barX += 4;
            barY += 4;
        }
        this.drawTexturedModalRect(barX, barY, 0, 171, 18, 85);

        FluidStack stack = this.fluidReference.getFluid();
        Fluid fluid = stack == null ? null : stack.getFluid();

        if (this.resLoc == null || this.oldFluid != fluid) {
            this.oldFluid = fluid;

            if (fluid != null && fluid.getStill() != null) {
                this.resLoc = new ResourceLocation(fluid.getStill().getNamespace(), "textures/" + fluid.getStill().getPath() + ".png");
            }
        }

        if (stack != null && fluid != null && this.resLoc != null) {
            mc.getTextureManager().bindTexture(this.resLoc);

            GlStateManager.pushMatrix();
            GlStateManager.enableBlend();
            GlStateManager.disableAlpha();
            GlStateManager.tryBlendFuncSeparate(770, 771, 1, 0);
            int i = this.fluidReference.getFluidAmount() * 83 / this.fluidReference.getCapacity();
            Gui.drawModalRectWithCustomSizedTexture(barX + 1, barY + 84 - i, 36, 172, 16, i, 16, 512);
            GlStateManager.disableBlend();
            GlStateManager.enableAlpha();
            GlStateManager.popMatrix();
        }

        if (this.drawTextNextTo) {
            this.drawString(mc.fontRenderer, this.getOverlayText(), barX + 25, barY + 78, StringUtil.DECIMAL_COLOR_WHITE);
        }
    }

    public void drawOverlay(int mouseX, int mouseY) {
        if (mouseX >= this.x && mouseY >= this.y && mouseX < this.x + (this.outline ? 26 : 18) && mouseY < this.y + (this.outline ? 93 : 85)) {
            Minecraft mc = Minecraft.getMinecraft();
            GuiUtils.drawHoveringText(Collections.singletonList(this.getOverlayText()), mouseX, mouseY, mc.displayWidth, mc.displayHeight, -1, mc.fontRenderer);
        }
    }

    private String getOverlayText() {
        NumberFormat format = NumberFormat.getInstance();
        FluidStack stack = this.fluidReference.getFluid();
        String cap = format.format(this.fluidReference.getCapacity());
        return stack == null || stack.getFluid() == null ? "0/" + cap + " mB" : format.format(this.fluidReference.getFluidAmount()) + "/" + cap + " mB " + stack.getLocalizedName();
    }
}