package org.saturnclient.ui.elements;

import java.util.function.BooleanSupplier;

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

/**
 * A labelled on/off switch ("Enabled" / "Disabled") that tints itself with the
 * accent color while on.
 */
public class SwitchButton extends Element {
    private static final int HEIGHT = 34;
    private static final int PADDING_LEFT = 14;
    private static final int PADDING_RIGHT = 5;
    private static final int GAP = 10;
    private static final float TEXT_SCALE = 0.66f;

    private final String onText;
    private final String offText;
    private final BooleanSupplier value;
    private final Runnable onToggle;

    public SwitchButton(String onText, String offText, BooleanSupplier value, Runnable onToggle) {
        this.onText = onText;
        this.offText = offText;
        this.value = value;
        this.onToggle = onToggle;
        this.height = HEIGHT;

        // Sized for the longer label, so the button doesn't change width when toggled
        int textWidth = Math.max(Fonts.getWidth(onText, Theme.FONT.value), Fonts.getWidth(offText, Theme.FONT.value));
        this.width = PADDING_LEFT + (int) (textWidth * TEXT_SCALE) + GAP + Toggle.SWITCH_WIDTH + PADDING_RIGHT;
    }

    @Override
    public void render(RenderScope renderScope, ElementContext ctx) {
        boolean on = value.getAsBoolean();
        float tint = ctx.isHovering() ? 0.1f : 0.06f;

        renderScope.drawRoundedRectangle(0, 0, width, height, Theme.WIDGET_RADIUS.value,
                on ? Theme.withAlpha(tint * 2.5f, Theme.ACCENT.value) : Theme.withAlpha(tint, Theme.FOREGROUND.value));

        renderScope.drawText(TEXT_SCALE, on ? onText : offText, PADDING_LEFT, Field.textY(height, TEXT_SCALE),
                Theme.FONT.value, on ? Theme.ACCENT.value : Theme.PRIMARY_FG.value);

        Toggle.drawSwitch(renderScope, width - PADDING_RIGHT - Toggle.SWITCH_WIDTH,
                (height - Toggle.SWITCH_HEIGHT) / 2, on);
    }

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