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package org.dominokit.domino.ui.themes;


import org.dominokit.domino.ui.style.ColorScheme;

import java.util.ArrayList;
import java.util.List;

import static elemental2.dom.DomGlobal.document;
import static java.util.Objects.nonNull;
import static org.dominokit.domino.ui.style.Style.bodyStyle;

public class Theme {

    private static List themeChangeHandlers = new ArrayList<>();

    public static final ColorScheme RED = ColorScheme.RED;

    public static final ColorScheme PINK = ColorScheme.PINK;

    public static final ColorScheme PURPLE = ColorScheme.PURPLE;

    public static final ColorScheme DEEP_PURPLE = ColorScheme.DEEP_PURPLE;

    public static final ColorScheme INDIGO = ColorScheme.INDIGO;

    public static final ColorScheme BLUE = ColorScheme.BLUE;

    public static final ColorScheme LIGHT_BLUE = ColorScheme.LIGHT_BLUE;

    public static final ColorScheme CYAN = ColorScheme.CYAN;

    public static final ColorScheme TEAL = ColorScheme.TEAL;

    public static final ColorScheme GREEN = ColorScheme.GREEN;

    public static final ColorScheme LIGHT_GREEN = ColorScheme.LIGHT_GREEN;

    public static final ColorScheme LIME = ColorScheme.LIME;

    public static final ColorScheme YELLOW = ColorScheme.YELLOW;

    public static final ColorScheme AMBER = ColorScheme.AMBER;

    public static final ColorScheme ORANGE = ColorScheme.ORANGE;

    public static final ColorScheme DEEP_ORANGE = ColorScheme.DEEP_ORANGE;

    public static final ColorScheme BROWN = ColorScheme.BROWN;

    public static final ColorScheme GREY = ColorScheme.GREY;

    public static final ColorScheme BLUE_GREY = ColorScheme.BLUE_GREY;

    public static final ColorScheme BLACK = ColorScheme.BLACK;

    public static final ColorScheme WHITE = ColorScheme.WHITE;

    public static final ColorScheme TRANSPARENT = ColorScheme.TRANSPARENT;

    private final ColorScheme scheme;
    private final String themeStyle;
    private final String name;

    public static Theme currentTheme = new Theme(ColorScheme.RED);

    public Theme(ColorScheme scheme) {
        this.scheme = scheme;
        this.themeStyle = scheme.color().getStyle().replace("col-", "theme-");
        this.name = scheme.color().getName().replace(" ", "_").toLowerCase();
    }

    public ColorScheme getScheme() {
        return scheme;
    }

    public String getThemeStyle() {
        return themeStyle;
    }

    public String getName() {
        return name;
    }

    public static void addThemeChangeHandler(ThemeChangeHandler themeChangeHandler) {
        themeChangeHandlers.add(themeChangeHandler);
    }

    public static void removeThemeChangeHandler(ThemeChangeHandler themeChangeHandler) {
        themeChangeHandlers.remove(themeChangeHandler);
    }

    public void apply() {
        Theme oldTheme = currentTheme;
        if (nonNull(currentTheme))
            document.body.classList.remove(currentTheme.themeStyle);
        this.currentTheme = this;
        bodyStyle().add(themeStyle);
        themeChangeHandlers.forEach(themeChangeHandler -> themeChangeHandler.onThemeChanged(oldTheme, this));
    }

    @FunctionalInterface
    public interface ThemeChangeHandler {
        void onThemeChanged(Theme oldTheme, Theme newTheme);
    }
}