/**
 *
 * Close current window (and focus on an other window). If no window handle is given
 * it automatically switches back to the first handle.
 *
 * <example>
    :close.js
    it('should demonstrate the close command', function () {
        browser.url('http://github.com')
        browser.newWindow('http://google.com')

        var title = browser.getTitle()
        console.log(title) // outputs: "Google"

        browser.close()

        title = browser.getTitle()
        console.log(title) // outputs: "GitHub · Build software better, together."
    })
 * </example>
 *
 * @alias browser.close
 * @param {String=} windowHandle new window to focus on
 * @uses protocol/window, window/switchTab
 * @type window
 *
 */

import { RuntimeError } from '../utils/ErrorHandler'

let close = function (windowHandle) {
    if (typeof windowHandle !== 'string') {
        return this.getTabIds().then((tabIds) => {
            if (tabIds.length === 0) {
                throw new RuntimeError('' +
                    'Can\'t switch to the next tab because all windows are closed. ' +
                    'Make sure you keep at least one window open!')
            }

            return this.window().switchTab(tabIds[0])
        })
    }

    return this.window().switchTab(windowHandle)
}

export default close