/**
 * --------------------------------------------
 * AdminLTE Layout.js
 * License MIT
 * --------------------------------------------
 */

import $ from 'jquery'

/**
 * Constants
 * ====================================================
 */

const NAME = 'Layout'
const DATA_KEY = 'lte.layout'
const JQUERY_NO_CONFLICT = $.fn[NAME]

const Selector = {
  HEADER: '.main-header',
  MAIN_SIDEBAR: '.main-sidebar',
  SIDEBAR: '.main-sidebar .sidebar',
  CONTENT: '.content-wrapper',
  CONTROL_SIDEBAR_CONTENT: '.control-sidebar-content',
  CONTROL_SIDEBAR_BTN: '[data-widget="control-sidebar"]',
  FOOTER: '.main-footer',
  PUSHMENU_BTN: '[data-widget="pushmenu"]',
  LOGIN_BOX: '.login-box',
  REGISTER_BOX: '.register-box'
}

const ClassName = {
  SIDEBAR_FOCUSED: 'sidebar-focused',
  LAYOUT_FIXED: 'layout-fixed',
  CONTROL_SIDEBAR_SLIDE_OPEN: 'control-sidebar-slide-open',
  CONTROL_SIDEBAR_OPEN: 'control-sidebar-open'
}

const Default = {
  scrollbarTheme: 'os-theme-light',
  scrollbarAutoHide: 'l',
  panelAutoHeight: true,
  loginRegisterAutoHeight: true
}

/**
 * Class Definition
 * ====================================================
 */

class Layout {
  constructor(element, config) {
    this._config = config
    this._element = element

    this._init()
  }

  // Public

  fixLayoutHeight(extra = null) {
    const $body = $('body')
    let controlSidebar = 0

    if ($body.hasClass(ClassName.CONTROL_SIDEBAR_SLIDE_OPEN) || $body.hasClass(ClassName.CONTROL_SIDEBAR_OPEN) || extra === 'control_sidebar') {
      controlSidebar = $(Selector.CONTROL_SIDEBAR_CONTENT).height()
    }

    const heights = {
      window: $(window).height(),
      header: $(Selector.HEADER).length !== 0 ? $(Selector.HEADER).outerHeight() : 0,
      footer: $(Selector.FOOTER).length !== 0 ? $(Selector.FOOTER).outerHeight() : 0,
      sidebar: $(Selector.SIDEBAR).length !== 0 ? $(Selector.SIDEBAR).height() : 0,
      controlSidebar
    }

    const max = this._max(heights)
    let offset = this._config.panelAutoHeight

    if (offset === true) {
      offset = 0
    }

    const $contentSelector = $(Selector.CONTENT)

    if (offset !== false) {
      if (max === heights.controlSidebar) {
        $contentSelector.css('min-height', (max + offset))
      } else if (max === heights.window) {
        $contentSelector.css('min-height', (max + offset) - heights.header - heights.footer)
      } else {
        $contentSelector.css('min-height', (max + offset) - heights.header)
      }

      if (this._isFooterFixed()) {
        $contentSelector.css('min-height', parseFloat($contentSelector.css('min-height')) + heights.footer)
      }
    }

    if (!$body.hasClass(ClassName.LAYOUT_FIXED)) {
      return
    }

    if (offset !== false) {
      $contentSelector.css('min-height', (max + offset) - heights.header - heights.footer)
    }

    if (typeof $.fn.overlayScrollbars !== 'undefined') {
      $(Selector.SIDEBAR).overlayScrollbars({
        className: this._config.scrollbarTheme,
        sizeAutoCapable: true,
        scrollbars: {
          autoHide: this._config.scrollbarAutoHide,
          clickScrolling: true
        }
      })
    }
  }

  fixLoginRegisterHeight() {
    const $body = $('body')
    const $selector = $(Selector.LOGIN_BOX + ', ' + Selector.REGISTER_BOX)

    if ($selector.length === 0) {
      $body.css('height', 'auto')
      $('html').css('height', 'auto')
    } else {
      const boxHeight = $selector.height()

      if ($body.css('min-height') !== boxHeight) {
        $body.css('min-height', boxHeight)
      }
    }
  }

  // Private

  _init() {
    // Activate layout height watcher
    this.fixLayoutHeight()

    if (this._config.loginRegisterAutoHeight === true) {
      this.fixLoginRegisterHeight()
    } else if (this._config.loginRegisterAutoHeight === parseInt(this._config.loginRegisterAutoHeight, 10)) {
      setInterval(this.fixLoginRegisterHeight, this._config.loginRegisterAutoHeight)
    }

    $(Selector.SIDEBAR)
      .on('collapsed.lte.treeview expanded.lte.treeview', () => {
        this.fixLayoutHeight()
      })

    $(Selector.PUSHMENU_BTN)
      .on('collapsed.lte.pushmenu shown.lte.pushmenu', () => {
        this.fixLayoutHeight()
      })

    $(Selector.CONTROL_SIDEBAR_BTN)
      .on('collapsed.lte.controlsidebar', () => {
        this.fixLayoutHeight()
      })
      .on('expanded.lte.controlsidebar', () => {
        this.fixLayoutHeight('control_sidebar')
      })

    $(window).resize(() => {
      this.fixLayoutHeight()
    })

    setTimeout(() => {
      $('body.hold-transition').removeClass('hold-transition')
    }, 50)
  }

  _max(numbers) {
    // Calculate the maximum number in a list
    let max = 0

    Object.keys(numbers).forEach(key => {
      if (numbers[key] > max) {
        max = numbers[key]
      }
    })

    return max
  }

  _isFooterFixed() {
    return $(Selector.FOOTER).css('position') === 'fixed'
  }

  // Static

  static _jQueryInterface(config = '') {
    return this.each(function () {
      let data = $(this).data(DATA_KEY)
      const _options = $.extend({}, Default, $(this).data())

      if (!data) {
        data = new Layout($(this), _options)
        $(this).data(DATA_KEY, data)
      }

      if (config === 'init' || config === '') {
        data._init()
      } else if (config === 'fixLayoutHeight' || config === 'fixLoginRegisterHeight') {
        data[config]()
      }
    })
  }
}

/**
 * Data API
 * ====================================================
 */

$(window).on('load', () => {
  Layout._jQueryInterface.call($('body'))
})

$(Selector.SIDEBAR + ' a').on('focusin', () => {
  $(Selector.MAIN_SIDEBAR).addClass(ClassName.SIDEBAR_FOCUSED)
})

$(Selector.SIDEBAR + ' a').on('focusout', () => {
  $(Selector.MAIN_SIDEBAR).removeClass(ClassName.SIDEBAR_FOCUSED)
})

/**
 * jQuery API
 * ====================================================
 */

$.fn[NAME] = Layout._jQueryInterface
$.fn[NAME].Constructor = Layout
$.fn[NAME].noConflict = function () {
  $.fn[NAME] = JQUERY_NO_CONFLICT
  return Layout._jQueryInterface
}

export default Layout