package org.saturnclient.ui.components;

import org.saturnclient.config.Theme;
import org.saturnclient.ui.Element;
import org.saturnclient.ui.ElementContext;
import org.saturnclient.ui.RenderScope;
import org.saturnclient.ui.resources.Fonts;

/**
 * A theme preset: a small mock-up of a panel in its colors, and its name.
 * Clicking it applies the preset.
 */
public class ThemePresetCard extends Element {
    public static final int HEIGHT = 92;

    private static final int PADDING = 10;
    private static final int PREVIEW_HEIGHT = 44;
    private static final float NAME_SCALE = 0.68f;

    private final Theme.Preset preset;
    private final Runnable onApply;

    /**
     * @param onApply runs after the preset is applied, to refresh what shows the
     *                old colors
     */
    public ThemePresetCard(Theme.Preset preset, int width, Runnable onApply) {
        this.preset = preset;
        this.onApply = onApply;
        this.width = width;
        this.height = HEIGHT;
    }

    @Override
    public void render(RenderScope renderScope, ElementContext ctx) {
        boolean active = preset.isActive();
        int border = active ? Theme.ACCENT.value
                : Theme.withAlpha(ctx.isHovering() ? 0.22f : 0.06f, Theme.FOREGROUND.value);

        renderScope.drawRoundedRectangle(0, 0, width, height, Theme.WIDGET_RADIUS.value, active ? 2 : 1,
                Theme.withAlpha(0.72f, Theme.PRIMARY.value), border);

        // A panel in the preset's colors: a line of text over an accent and a widget
        int previewWidth = width - PADDING * 2;
        renderScope.drawRoundedRectangle(PADDING, PADDING, previewWidth, PREVIEW_HEIGHT, 8, preset.background());
        renderScope.drawRoundedRectangle(PADDING + 8, PADDING + 8, previewWidth * 6 / 10, 5, 3,
                Theme.withAlpha(0.8f, preset.foreground()));
        renderScope.drawRoundedRectangle(PADDING + 8, PADDING + PREVIEW_HEIGHT - 20, 34, 12, 4, preset.accent());
        renderScope.drawRoundedRectangle(PADDING + 47, PADDING + PREVIEW_HEIGHT - 20, 22, 12, 4, preset.primary());

        int nameY = PADDING + PREVIEW_HEIGHT + (height - PADDING - PREVIEW_HEIGHT - (int) (Fonts.getHeight() * NAME_SCALE)) / 2;
        renderScope.drawText(NAME_SCALE, preset.name(), PADDING, nameY, Theme.FONT.value, Theme.FOREGROUND.value);
    }

    @Override
    public void click(int mouseX, int mouseY) {
        preset.apply();
        onApply.run();
    }
}