// @flow

import type { Dispatch } from 'redux';

import { isLayoutTileView } from '../video-layout';

import {
    CLEAR_TOOLBOX_TIMEOUT,
    FULL_SCREEN_CHANGED,
    SET_FULL_SCREEN,
    SET_OVERFLOW_DRAWER,
    SET_OVERFLOW_MENU_VISIBLE,
    SET_TOOLBAR_HOVERED,
    SET_TOOLBOX_TIMEOUT,
    SET_TOOLBOX_TIMEOUT_MS
} from './actionTypes';
import { setToolboxVisible } from './actions.any';

declare var interfaceConfig: Object;

export * from './actions.any';

/**
 * Docks/undocks the Toolbox.
 *
 * @param {boolean} dock - True if dock, false otherwise.
 * @returns {Function}
 */
export function dockToolbox(dock: boolean): Function {
    return (dispatch: Dispatch<any>, getState: Function) => {
        const { timeoutMS, visible } = getState()['features/toolbox'];

        if (dock) {
            // First make sure the toolbox is shown.
            visible || dispatch(showToolbox());

            dispatch(clearToolboxTimeout());
        } else if (visible) {
            dispatch(
                setToolboxTimeout(
                    () => dispatch(hideToolbox()),
                    timeoutMS));
        } else {
            dispatch(showToolbox());
        }
    };
}

/**
 * Signals that full screen mode has been entered or exited.
 *
 * @param {boolean} fullScreen - Whether or not full screen mode is currently
 * enabled.
 * @returns {{
 *     type: FULL_SCREEN_CHANGED,
 *     fullScreen: boolean
 * }}
 */
export function fullScreenChanged(fullScreen: boolean) {
    return {
        type: FULL_SCREEN_CHANGED,
        fullScreen
    };
}

/**
 * Hides the toolbox.
 *
 * @param {boolean} force - True to force the hiding of the toolbox without
 * caring about the extended toolbar side panels.
 * @returns {Function}
 */
export function hideToolbox(force: boolean = false): Function {
    return (dispatch: Dispatch<any>, getState: Function) => {
        const state = getState();
        const {
            alwaysVisible,
            hovered,
            timeoutMS
        } = state['features/toolbox'];

        if (alwaysVisible) {
            return;
        }

        dispatch(clearToolboxTimeout());

        const focusSelector = '.toolbox-content-items:focus-within,.filmstrip:focus-within,.remotevideomenu:hover';

        if (!force
                && (hovered
                    || state['features/invite'].calleeInfoVisible
                    || state['features/chat'].isOpen
                    || document.querySelector(focusSelector))) {
            dispatch(
                setToolboxTimeout(
                    () => dispatch(hideToolbox()),
                    timeoutMS));
        } else {
            dispatch(setToolboxVisible(false));
        }
    };
}

/**
 * Signals a request to enter or exit full screen mode.
 *
 * @param {boolean} fullScreen - True to enter full screen mode, false to exit.
 * @returns {{
 *     type: SET_FULL_SCREEN,
 *     fullScreen: boolean
 * }}
 */
export function setFullScreen(fullScreen: boolean) {
    return {
        type: SET_FULL_SCREEN,
        fullScreen
    };
}

/**
 * Shows the toolbox for specified timeout.
 *
 * @param {number} timeout - Timeout for showing the toolbox.
 * @returns {Function}
 */
export function showToolbox(timeout: number = 0): Object {
    return (dispatch: Dispatch<any>, getState: Function) => {
        const state = getState();
        const {
            alwaysVisible,
            enabled,
            timeoutMS,
            visible,
            overflowDrawer
        } = state['features/toolbox'];
        const { contextMenuOpened } = state['features/base/responsive-ui'];
        const contextMenuOpenedInTileview = isLayoutTileView(state) && contextMenuOpened && !overflowDrawer;

        if (enabled && !visible && !contextMenuOpenedInTileview) {
            dispatch(setToolboxVisible(true));

            // If the Toolbox is always visible, there's no need for a timeout
            // to toggle its visibility.
            if (!alwaysVisible) {
                dispatch(
                    setToolboxTimeout(
                        () => dispatch(hideToolbox()),
                        timeout || timeoutMS));
                dispatch(setToolboxTimeoutMS(interfaceConfig.TOOLBAR_TIMEOUT));
            }
        }
    };
}

/**
 * Signals a request to display overflow as drawer.
 *
 * @param {boolean} displayAsDrawer - True to display overflow as drawer, false to preserve original behaviour.
 * @returns {{
 *     type: SET_OVERFLOW_DRAWER,
 *     displayAsDrawer: boolean
 * }}
 */
export function setOverflowDrawer(displayAsDrawer: boolean) {
    return {
        type: SET_OVERFLOW_DRAWER,
        displayAsDrawer
    };
}


/**
 * Disables and hides the toolbox on demand when in tile view.
 *
 * @returns {void}
 */
export function hideToolboxOnTileView() {
    return (dispatch: Dispatch<any>, getState: Function) => {
        const state = getState();
        const { overflowDrawer } = state['features/toolbox'];

        if (!overflowDrawer && isLayoutTileView(state)) {
            dispatch(hideToolbox(true));
        }
    };
}

/**
 * Signals that toolbox timeout should be cleared.
 *
 * @returns {{
 *     type: CLEAR_TOOLBOX_TIMEOUT
 * }}
 */
export function clearToolboxTimeout(): Object {
    return {
        type: CLEAR_TOOLBOX_TIMEOUT
    };
}

/**
 * Shows/hides the overflow menu.
 *
 * @param {boolean} visible - True to show it or false to hide it.
 * @returns {{
 *     type: SET_OVERFLOW_MENU_VISIBLE,
 *     visible: boolean
 * }}
 */
export function setOverflowMenuVisible(visible: boolean): Object {
    return {
        type: SET_OVERFLOW_MENU_VISIBLE,
        visible
    };
}

/**
 * Signals that toolbar is hovered value should be changed.
 *
 * @param {boolean} hovered - Flag showing whether toolbar is hovered.
 * @returns {{
 *     type: SET_TOOLBAR_HOVERED,
 *     hovered: boolean
 * }}
 */
export function setToolbarHovered(hovered: boolean): Object {
    return {
        type: SET_TOOLBAR_HOVERED,
        hovered
    };
}

/**
 * Dispatches an action which sets new timeout and clears the previous one.
 *
 * @param {Function} handler - Function to be invoked after the timeout.
 * @param {number} timeoutMS - Delay.
 * @returns {{
 *     type: SET_TOOLBOX_TIMEOUT,
 *     handler: Function,
 *     timeoutMS: number
 * }}
 */
export function setToolboxTimeout(handler: Function, timeoutMS: number): Object {
    return {
        type: SET_TOOLBOX_TIMEOUT,
        handler,
        timeoutMS
    };
}

/**
 * Dispatches an action which sets new toolbox timeout value.
 *
 * @param {number} timeoutMS - Delay.
 * @returns {{
 *     type: SET_TOOLBOX_TIMEOUT_MS,
 *     timeoutMS: number
 * }}
 */
export function setToolboxTimeoutMS(timeoutMS: number): Object {
    return {
        type: SET_TOOLBOX_TIMEOUT_MS,
        timeoutMS
    };
}