package org.saturnclient.ui.components;

import org.saturnclient.config.Theme;
import org.saturnclient.mod.HudMod;
import org.saturnclient.mod.ModLayout;
import org.saturnclient.ui.Element;
import org.saturnclient.ui.ElementContext;
import org.saturnclient.ui.RenderScope;

/**
 * A card showing a HUD mod as it looks in game, following its settings live.
 * The mod is drawn at its in-game scale, shrunk if needed to fit the card.
 */
public class HudPreviewCard extends Element {
    private static final int PADDING = 16;
    private static final int TITLE_HEIGHT = 24;
    private static final float TITLE_SCALE = 0.6f;

    private final HudMod mod;
    private final HudModPreview preview;

    public HudPreviewCard(HudMod mod) {
        this.mod = mod;
        this.preview = new HudModPreview(mod);
    }

    @Override
    public void render(RenderScope renderScope, ElementContext ctx) {
        renderScope.drawRoundedRectangle(0, 0, width, height, Theme.WIDGET_RADIUS.value + 4, 1,
                Theme.withAlpha(0.72f, Theme.PRIMARY.value), Theme.withAlpha(0.06f, Theme.FOREGROUND.value));

        renderScope.drawText(TITLE_SCALE, "PREVIEW", PADDING, PADDING, Theme.FONT.value, Theme.getMutedFg());

        ModLayout layout = mod.getDimensions();
        if (layout.width <= 0 || layout.height <= 0) {
            return;
        }

        // HUD mods are laid out in GUI pixels, which are two Saturn units.
        int areaWidth = width - PADDING * 2;
        int areaHeight = height - PADDING * 2 - TITLE_HEIGHT;
        float scale = Math.min(layout.scale.value * 2,
                Math.min((float) areaWidth / layout.width, (float) areaHeight / layout.height));

        float x = PADDING + (areaWidth - layout.width * scale) / 2;
        float y = PADDING + TITLE_HEIGHT + (areaHeight - layout.height * scale) / 2;

        renderScope.getMatrixStack().push();
        renderScope.getMatrixStack().translate(x, y);
        renderScope.getMatrixStack().scale(scale, scale);
        preview.render(renderScope, ctx);
        renderScope.getMatrixStack().pop();
    }
}