package gregtech.api.gui.widgets;

import java.util.Arrays;

import gregtech.api.interfaces.IGuiIcon;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.util.ResourceLocation;

public enum GT_GuiIcon implements IGuiIcon{
    BUTTON_NORMAL           (0, 0,     0),
    BUTTON_DOWN             (0, 32,    0),
    BUTTON_HIGHLIGHT        (0, 32*2,  0),
    BUTTON_HIGHLIGHT_DOWN   (0, 32*3,  0),
    BUTTON_DISABLED         (0, 32*4,  0),

    DISABLE                 (0, 0,     32),
    REDSTONE_OFF            (0, 32,    32),
    REDSTONE_ON             (0, 32*2,  32),
    CHECKMARK               (0, 32*3,  32),
    CROSS                   (0, 32*4,  32),
    WHITELIST               (0, 32*5,  32),
    BLACKLIST               (0, 32*6,  32),
    PROGRESS                (0, 32*7,  32),

    EXPORT                  (0, 0,     32*2),
    IMPORT                  (0, 32,    32*2),
    ALLOW_INPUT             (0, 32*2,  32*2),
    BLOCK_INPUT             (0, 32*3,  32*2),
    GREEN_ARROW_UP          (0, 32*4,  32*2),
    GREEN_ARROW_DOWN        (0, 32*5,  32*2),
    CYCLIC                  (0, 32*6,  32*2),

    SLOT_DARKGRAY           (1, 176,0,18,18),
    SLOT_GRAY               (1, 176,18,18,18),

    TAB_NORMAL              (2,     0,   0,18,20),
    TAB_HIGHLIGHT           (2,    18,   0,18,20),
    TAB_DISABLED            (2,  18*2,   0,18,20),
    TAB_NORMAL_BRONZE       (2,     0,  20,18,20),
    TAB_HIGHLIGHT_BRONZE    (2,    18,  20,18,20),
    TAB_DISABLED_BRONZE     (2,  18*2,  20,18,20),
    TAB_NORMAL_STEEL        (2,     0,2*20,18,20),
    TAB_HIGHLIGHT_STEEL     (2,    18,2*20,18,20),
    TAB_DISABLED_STEEL      (2,  18*2,2*20,18,20),
    TAB_NORMAL_BRICK        (2,     0,3*20,18,20),
    TAB_HIGHLIGHT_BRICK     (2,    18,3*20,18,20),
    TAB_DISABLED_BRICK      (2,  18*2,3*20,18,20),
    TAB_INFO_GRAY           (2,   220,   0,18,20),
    TAB_INFO_BLUE           (2,220+18,   0,18,20),
;


    private static final int T_SIZE = 256;
    private static ResourceLocation[] TEXTURES = {
            new ResourceLocation("gregtech", "textures/gui/GuiButtons.png"),
            new ResourceLocation("gregtech", "textures/gui/GuiCover.png"),
            new ResourceLocation("gregtech", "textures/gui/GuiTabs.png"),
    };

    public final int x, y, width, height;
    public final IGuiIcon overlay;
    private final int texID;

    GT_GuiIcon(int texID, int x, int y, int width, int height, IGuiIcon overlay) {
        this.x = x;
        this.y = y;
        this.width = width;
        this.height = height;
        this.overlay = overlay;
        this.texID = texID;
    }

    GT_GuiIcon(int texID, int x, int y) {
        this(texID, x, y,32,32,null);
    }
    GT_GuiIcon(int texID, int x, int y, int width, int height) {
        this(texID, x, y, width, height,null);
    }
    public static void render(IGuiIcon icon, double x, double y, double width, double height, double zLevel,
            boolean doDraw) {
        render(icon, x, y, width, height, zLevel, doDraw, false);
    }

    public static void render(IGuiIcon icon, double x, double y, double width, double height, double zLevel,
            boolean doDraw, boolean flipHoritontally) {
        Tessellator tess = Tessellator.instance;
        if (doDraw) {
            Minecraft.getMinecraft().renderEngine.bindTexture(TEXTURES[icon.getTexId()]);
            tess.startDrawingQuads();
        }
        double minU = (double) (icon.getX() + (flipHoritontally ? icon.getWidth() : 0)) / T_SIZE;
        double maxU = (double) (icon.getX() + (flipHoritontally ? 0: icon.getWidth())) / T_SIZE;
        double minV = (double) icon.getY() / T_SIZE;
        double maxV = (double) (icon.getY() + icon.getHeight()) / T_SIZE;
        tess.addVertexWithUV(x, y + height, zLevel, minU, maxV);
        tess.addVertexWithUV(x + width, y + height, zLevel, maxU, maxV);
        tess.addVertexWithUV(x + width, y + 0, zLevel, maxU, minV);
        tess.addVertexWithUV(x, y + 0, zLevel, minU, minV);

        if (icon.getOverlay() != null)
            render(icon.getOverlay(), x, y, width, height, zLevel, false);

        if (doDraw)
            tess.draw();
    }

    /**
     * This is intended to enable addon mods to register additional textures. They can then add to this enum using
     * EnumHelper.addEnum or by creating your their enum that implements IGuiIcon (still requires adding a texture here)
     *
     * @param location
     */
    public static void addTextures(ResourceLocation... location) {
        if (location == null || location.length == 0) return;

        int startIndex = TEXTURES.length;
        TEXTURES = (ResourceLocation[]) Arrays.copyOf(TEXTURES, location.length);
        for (int i = 0; i < location.length; i++) {
            TEXTURES[startIndex + i] = location[i];
        }
    }

    @Override
    public int getX() {
        return this.x;
    }

    @Override
    public int getY() {
        return this.y;
    }

    @Override
    public int getWidth() {
        return this.width;
    }

    @Override
    public int getHeight() {
        return this.height;
    }

    @Override
    public int getTexId() {
        return this.texID;
    }

    @Override
    public IGuiIcon getOverlay() {
        return this.overlay;
    }
}