/**
 * 系統(tǒng)狀態(tài)欄與底部導(dǎo)航欄相關(guān)工具類
 * <p>僅在 SDK >= 4.4 時(shí)有效</p>
 * <p>本工具類共分兩種模式：著色模式{@link #setDisplayOption} 和 全透明模式{@link #fullTransparentBar}</p>
 */
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
public final class SystemBarUtil {
    private static final String TAG_STATUS_BAR = "StatusBar";
    private static final String TAG_NAVIGATION_BAR = "NavigationBar";
    /* 無效的顏色值 */
    private static final int INVALID_VAL = -1;
    /* 默認(rèn)的狀態(tài)欄顏色 */
    private static final int DEFAULT_STATUS_COLOR = 0x10000000;
    /* 默認(rèn)的底部導(dǎo)航欄顏色 */
    private static final int DEFAULT_NAVIGATION_COLOR = Color.TRANSPARENT;

    private SystemBarUtil() {
        throw new UnsupportedOperationException("cannot be instantiated");
    }

    /***********************************************************************************************
     ****  沉浸式系統(tǒng)欄（狀態(tài)欄與導(dǎo)航欄）邀跃，著色模式霉咨，不可全透明（sdk >= 4.4）
     **********************************************************************************************/
    /**
     * 設(shè)置狀態(tài)欄和底部導(dǎo)航欄的顯示方式
     *
     * @param activity        activity
     * @param fitSystemWindow {@code true}: 內(nèi)容不會(huì)顯示到狀態(tài)欄和導(dǎo)航欄上<br>{@code false}: 內(nèi)容顯示到狀態(tài)欄和導(dǎo)航欄上
     * @param clipToPadding   {@code true}: 裁剪 padding 區(qū)域，padding 區(qū)域不可使用<br>{@code false}: 不裁剪 padding 區(qū)域，padding 區(qū)域可使用
     */
    public static void setDisplayOption(@NonNull Activity activity, boolean fitSystemWindow, boolean clipToPadding) {
        // 獲取根布局
        ViewGroup rootView = (ViewGroup) ((ViewGroup) activity.findViewById(android.R.id.content)).getChildAt(0);
        rootView.setClipToPadding(clipToPadding);
        rootView.setFitsSystemWindows(fitSystemWindow);
    }

    /**
     * 設(shè)置頂部狀態(tài)欄
     *
     * @param activity
     * @param color    設(shè)置頂部狀態(tài)欄的顏色
     */
    public static void setupStatusBar(@NonNull Activity activity, @ColorInt int color) {
        int statusHeight = ScreenUtil.getStatusBarHeight();
        int statusColor = DEFAULT_STATUS_COLOR;
        if (color != INVALID_VAL) {
            statusColor = color;
        }
        // 設(shè)置狀態(tài)欄透明
        activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
        ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();
        // 防止重復(fù)添加 statusBarView
        removeStatusBarView(decorView);
        // 繪制一個(gè)和狀態(tài)欄一樣高的矩形 View
        View statusBarView = createStatusBarView(activity, statusHeight, statusColor);
        // 添加 statusBarView 到整個(gè)Window的最頂層布局中,這里的 statusBarView 只是作為狀態(tài)欄的背景，
        // 它的 visible 不能影響到狀態(tài)欄的 visible
        decorView.addView(statusBarView);
    }

    /**
     * 繪制一個(gè)和狀態(tài)欄一樣高的矩形View
     *
     * @param activity
     * @param statusHeight 繪制的矩形的高度
     * @param statusColor  繪制的矩形的顏色
     * @return 繪制的矩形 View
     */
    private static View createStatusBarView(@NonNull Activity activity, int statusHeight, @ColorInt int statusColor) {
        View statusBarView = new View(activity);
        FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, statusHeight);
        params.gravity = Gravity.TOP;
        statusBarView.setLayoutParams(params);
        statusBarView.setBackgroundColor(statusColor);
        statusBarView.setTag(TAG_STATUS_BAR);
        return statusBarView;
    }

    /**
     * 移除已經(jīng)存在的 statusBarView
     *
     * @param decorView
     */
    private static void removeStatusBarView(@NonNull ViewGroup decorView) {
        View statusBarView = decorView.findViewWithTag(TAG_STATUS_BAR);
        if (statusBarView != null) {
            decorView.removeView(statusBarView);
        }
    }

    /**
     * 設(shè)置狀態(tài)欄的透明度
     *
     * @param activity
     * @param alpha    透明度（0-1）
     */
    public static void setStatusBarAlpha(@NonNull Activity activity, @FloatRange(from = 0, to = 1) float alpha) {
        ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();
        View statusView = decorView.findViewWithTag(TAG_STATUS_BAR);
        if (statusView != null) {
            statusView.setAlpha(alpha);
        }
    }

    /**
     * 設(shè)置狀態(tài)欄的顯示和隱藏
     *
     * @param activity
     * @param isShow   {@code true}: 顯示<br>{@code false}: 隱藏
     */
    public static void showStatusBar(@NonNull Activity activity, boolean isShow) {
        ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();
        View statusView = decorView.findViewWithTag(TAG_STATUS_BAR);
        if (isShow) {
            if (statusView != null) {
                statusView.setVisibility(View.VISIBLE);
            }
            activity.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
        } else {
            if (statusView != null) {
                statusView.setVisibility(View.GONE);
            }
            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
        }
    }

    /**
     * 設(shè)置底部導(dǎo)航欄
     *
     * @param activity
     * @param color    底部導(dǎo)航欄的顏色
     */
    public static void setupNavBar(@NonNull Activity activity, @ColorInt int color) {
        if (ScreenUtil.hasNavigationBar()) {
            activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
            int navHeight = ScreenUtil.getNavBarHeight();
            int navColor = DEFAULT_NAVIGATION_COLOR;
            if (color != INVALID_VAL) {
                navColor = color;
            }
            ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();
            removeNavBarView(decorView);
            View navBarView = createNavBarView(activity, navHeight, navColor);
            decorView.addView(navBarView);
        }
    }

    /**
     * 繪制一個(gè)和底部導(dǎo)航欄一樣高的矩形 View
     *
     * @param activity
     * @param navHeight 繪制的矩形的高度
     * @param navColor  繪制的矩形的顏色
     * @return 繪制的矩形 View
     */
    private static View createNavBarView(@NonNull Activity activity, int navHeight, @ColorInt int navColor) {
        View navBarView = new View(activity);
        FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT, navHeight);
        params.gravity = Gravity.BOTTOM;
        navBarView.setLayoutParams(params);
        navBarView.setBackgroundColor(navColor);
        navBarView.setTag(TAG_NAVIGATION_BAR);
        return navBarView;
    }

    /**
     * 移除已經(jīng)存在的 navBarView
     *
     * @param decorView
     */
    private static void removeNavBarView(@NonNull ViewGroup decorView) {
        View navBarView = decorView.findViewWithTag(TAG_NAVIGATION_BAR);
        if (navBarView != null) {
            decorView.removeView(navBarView);
        }
    }

    /**
     * 設(shè)置底部導(dǎo)航欄的透明度
     *
     * @param activity
     * @param alpha    透明度（0-1）
     */
    public static void setNavBarAlpha(@NonNull Activity activity, @FloatRange(from = 0, to = 1) float alpha) {
        if (ScreenUtil.hasNavigationBar()) {
            ViewGroup decorView = (ViewGroup) activity.getWindow().getDecorView();
            View navBarView = decorView.findViewWithTag(TAG_NAVIGATION_BAR);
            if (navBarView != null) {
                navBarView.setAlpha(alpha);
            }
        }
    }

    /**
     * 設(shè)置底部導(dǎo)航欄的顯示和隱藏
     *
     * @param activity activity
     * @param isShow   {@code true}: 顯示<br>{@code false}: 隱藏
     */
    public static void showNavBar(@NonNull Activity activity, boolean isShow) {
        if (ScreenUtil.hasNavigationBar()) {
            View decorView = activity.getWindow().getDecorView();
            if (isShow) {
                decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
            } else {
                decorView.setSystemUiVisibility(View.INVISIBLE);
            }
        }
    }

    /***********************************************************************************************
     ****  沉浸式系統(tǒng)欄（狀態(tài)欄與導(dǎo)航欄）崎坊，全透明模式向臀，（sdk >= 5.0）
     **********************************************************************************************/
    /**
     * 設(shè)置系統(tǒng)欄全透明
     *
     * @param activity
     * @param statusBar 狀態(tài)欄是否全透明
     * @param navBar    導(dǎo)航欄是否全透明
     */
    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public static void fullTransparentBar(Activity activity, boolean statusBar, boolean navBar) {
        Window window = activity.getWindow();
        window.clearFlags(
                WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
                        | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
        if (statusBar && navBar) {
            window.getDecorView().setSystemUiVisibility(
                    // 全屏顯示撬槽，但狀態(tài)欄不會(huì)被隱藏覆蓋，狀態(tài)欄依然可見，Activity 頂端布局部分會(huì)被狀態(tài)遮住
                    View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                            // 隱藏導(dǎo)航欄
                            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                            // 防止系統(tǒng)欄隱藏時(shí)內(nèi)容區(qū)域大小發(fā)生變化
                            | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setStatusBarColor(Color.TRANSPARENT);
            window.setNavigationBarColor(Color.TRANSPARENT);
        } else if (statusBar && !navBar) {
            window.getDecorView().setSystemUiVisibility(
                    // 全屏顯示，但狀態(tài)欄不會(huì)被隱藏覆蓋星爪，狀態(tài)欄依然可見，Activity 頂端布局部分會(huì)被狀態(tài)遮住
                    View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                            // 防止系統(tǒng)欄隱藏時(shí)內(nèi)容區(qū)域大小發(fā)生變化
                            | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setStatusBarColor(Color.TRANSPARENT);
        } else if (!statusBar && navBar) {
            window.getDecorView().setSystemUiVisibility(
                    // 全屏顯示粉私，但狀態(tài)欄不會(huì)被隱藏覆蓋顽腾，狀態(tài)欄依然可見，Activity 頂端布局部分會(huì)被狀態(tài)遮住
                    View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                            // 隱藏導(dǎo)航欄
                            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                            // 防止系統(tǒng)欄隱藏時(shí)內(nèi)容區(qū)域大小發(fā)生變化
                            | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
            window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
            window.setNavigationBarColor(Color.TRANSPARENT);
        }
    }
}