class MainMenu {
  DocumentID:string = "main-menu"
  HTMLTag:string = "LI"
  ImagePath:string = "img/"
  
  createIMG(src):any {
    var element = document.createElement("IMG")
    element.setAttribute("src", this.ImagePath + src)
    return element
  }

  createValue(value):any {
    var element = document.createElement("P")
    element.textContent = value
    return element
  }
}

class MainMenuItem extends MainMenu {
  menuKey:string
  value:string
  imgSrc:string
  headline:string
  id:string
  tableHeader:string[]

  constructor(menuKey:string, value:string, image:string, headline:string) {
    super()
    this.menuKey = menuKey
    this.value = value
    this.imgSrc = image
    this.headline = headline
  }

  createItem():void {
    var item = document.createElement("LI")
    item.addEventListener("click", function() { openThisMenu(item) })
    item.setAttribute("id", this.id)
    item.setAttribute("data-menu", this.menuKey)
    var img = this.createIMG(this.imgSrc)
    var value = this.createValue(this.value)
    
    item.appendChild(img)
    item.appendChild(value)

    var doc = document.getElementById(this.DocumentID)
    doc.appendChild(item)

    switch(this.menuKey) {
      case "playlist": 
        this.tableHeader = ["Playlist", "Tuner", "Last Update", "Availability %", "Type", "Streams", "group-title %", "tvg-id %", "Unique ID %"]
        break
      
      case "xmltv": 
        this.tableHeader = ["Guide", "Last Update", "Availability %", "Channels", "Programs"]
        break

      case "filter": 
        this.tableHeader = ["Filter Name", "Filter Type", "Filter"]
        break

      case "users": 
        this.tableHeader = ["Username", "Password", "WEB", "PMS", "M3U", "XML", "API"]
        break

      case "mapping": 
        this.tableHeader = ["BULK", "Ch. No.", "Logo", "Channel Name", "Playlist", "Group Title", "XMLTV File", "XMLTV ID", "Edit"]
        break

    }

    //console.log(this.menuKey, this.tableHeader);
    
  }
}

var SHELL_LAYOUT_READY:boolean = false

function setLayoutMenuState(open:boolean) {
  if (document.body == null) {
    return
  }

  if (open == true) {
    document.body.classList.add("menu-open")
  } else {
    document.body.classList.remove("menu-open")
  }
}

function toggleLayoutMenu() {
  if (document.body == null) {
    return
  }

  var isOpen:boolean = document.body.classList.contains("menu-open")
  setLayoutMenuState(!isOpen)
}

function closeLayoutMenuIfMobile() {
  if (window.innerWidth <= 900) {
    setLayoutMenuState(false)
  }
}

function setActiveMenu(menuID:string) {

  ACTIVE_MENU_ID = menuID.toString()
  var menu = document.getElementById("main-menu")
  if (menu == null) {
    return
  }

  var items = menu.getElementsByTagName("LI")
  for (var i = 0; i < items.length; i++) {
    items[i].classList.remove("menu-active")
  }

  var activeItem = document.getElementById(ACTIVE_MENU_ID)
  var activeMenuKey:string = ""
  if (activeItem != null) {
    activeItem.classList.add("menu-active")
    var menuKeyValue = activeItem.getAttribute("data-menu")
    if (menuKeyValue != null) {
      activeMenuKey = menuKeyValue
    }
  }

  if (document.body != null) {
    if (activeMenuKey.length > 0) {
      document.body.setAttribute("data-active-menu", activeMenuKey)
    } else {
      document.body.removeAttribute("data-active-menu")
    }

    if (activeMenuKey == "log") {
      document.body.classList.add("menu-log-focus")
    } else {
      document.body.classList.remove("menu-log-focus")
    }
  }
}

function renderStatusCards() {
  var wrapper = document.getElementById("status-cards")
  if (wrapper == null || SERVER.hasOwnProperty("clientInfo") == false) {
    return
  }

  var info = SERVER["clientInfo"]
  var errors:number = parseInt(info["errors"], 10)
  var warnings:number = parseInt(info["warnings"], 10)
  var cards:any[] = [
    {label: "Streams", value: info["streams"], tone: "ok"},
    {label: "EPG Source", value: info["epgSource"], tone: "neutral"},
    {label: "XEPG Channels", value: info["xepg"], tone: "ok"},
    {label: "Errors", value: info["errors"], tone: errors > 0 ? "error" : "ok"},
    {label: "Warnings", value: info["warnings"], tone: warnings > 0 ? "warn" : "ok"},
    {label: "DVR", value: info["DVR"], tone: "neutral"},
  ]

  wrapper.innerHTML = ""
  cards.forEach(card => {

    var box = document.createElement("DIV")
    box.className = "status-card status-card-" + card.tone

    var label = document.createElement("P")
    label.className = "status-card-label"
    label.innerText = card.label

    var value = document.createElement("P")
    value.className = "status-card-value"
    if (card.value == undefined || card.value == "") {
      value.innerText = "-"
    } else {
      value.innerText = card.value
    }

    box.appendChild(label)
    box.appendChild(value)
    wrapper.appendChild(box)
  });

}

function initShellLayout() {

  if (SHELL_LAYOUT_READY == true) {
    return
  }

  var toggle = document.getElementById("menu-toggle")
  if (toggle != null) {
    toggle.onclick = function() {
      toggleLayoutMenu()
    }
  }

  var overlay = document.getElementById("layout-overlay")
  if (overlay != null) {
    overlay.onclick = function() {
      setLayoutMenuState(false)
    }
  }

  document.addEventListener("keydown", function(event) {

    if (event.key == "Escape") {
      setLayoutMenuState(false)
      showElement("popup", false)
      return
    }

    if (event.key == "/") {
      var target = event.target as HTMLElement
      var onInput = target.tagName == "INPUT" || target.tagName == "TEXTAREA" || target.tagName == "SELECT"

      if (onInput == true) {
        return
      }

      var search = document.getElementById("searchMapping")
      if (search != null) {
        event.preventDefault();
        (search as HTMLInputElement).focus()
      }
    }

  });

  setConnectionState("idle")
  SHELL_LAYOUT_READY = true
}

function shouldPollLogs():boolean {
  if (document.hidden == true) {
    return false
  }

  if (document.getElementById("content_log") == null) {
    return false
  }

  if (ACTIVE_MENU_ID.length < 1) {
    return false
  }

  var activeItem = document.getElementById(ACTIVE_MENU_ID)
  if (activeItem == null) {
    return false
  }

  return activeItem.getAttribute("data-menu") == "log"
}

function PageReady() {

  initShellLayout()

  var server:Server = new Server("getServerConfig")
  server.request(new Object())

  var bootstrapAttempts:number = 0
  var maxBootstrapAttempts:number = 5
  var bootstrapTimer:number = window.setInterval(function() {

    if (SERVER.hasOwnProperty("clientInfo") == true) {
      window.clearInterval(bootstrapTimer)
      return
    }

    if (WS.hasQueued("getServerConfig")) {
      return
    }

    bootstrapAttempts++
    var retryServer:Server = new Server("getServerConfig")
    retryServer.request(new Object())

    if (bootstrapAttempts >= maxBootstrapAttempts) {
      window.clearInterval(bootstrapTimer)
    }

  }, 3000)

  window.addEventListener("resize", function(){
    if (window.innerWidth > 900) {
      setLayoutMenuState(false)
    }
    calculateWrapperHeight();
  }, true);

  setInterval(function(){ 
    if (shouldPollLogs() == false) {
      return
    }
    updateLog()
  }, 10000);
 

  return
}

function isClientInfoHttpURL(value:string):boolean {
  return /^https?:\/\//i.test(value)
}

function setClientInfoValue(key:string, value:any) {
  var element = document.getElementById(key)
  if (element == null) {
    return
  }

  var textValue = ""
  if (value != undefined && value != null) {
    textValue = String(value)
  }

  if ((key == "m3u-url" || key == "xepg-url") && isClientInfoHttpURL(textValue)) {
    element.innerHTML = ""
    var anchor = document.createElement("a")
    anchor.href = textValue
    anchor.target = "_blank"
    anchor.rel = "noopener noreferrer"
    anchor.textContent = textValue
    element.appendChild(anchor)
    return
  }

  element.textContent = textValue
}

// menuItemVisible reports whether a menu entry applies to the current server state.
function menuItemVisible(item:MainMenuItem):boolean {
  switch (item.menuKey) {

    case "users":
    case "logout":
      return SERVER["settings"]["authentication.web"] == true

    case "mapping":
    case "xmltv":
      return SERVER["clientInfo"]["epgSource"] == "XEPG"

    default:
      return true
  }
}

// renderedMenuKeys lists the menu entries currently in the document, in order.
function renderedMenuKeys(menu:HTMLElement):string[] {
  var keys:string[] = []
  var items = menu.getElementsByTagName("LI")
  for (var i = 0; i < items.length; i++) {
    keys.push(items[i].getAttribute("data-menu"))
  }
  return keys
}

function createLayout() {

  // Client Info
  var obj = SERVER["clientInfo"]
  var keys = getObjKeys(obj);
  for (var i = 0; i < keys.length; i++) {
    
    setClientInfoValue(keys[i], obj[keys[i]])
  
  }
  renderStatusCards()

  var menu = document.getElementById("main-menu")
  if (menu == null) {
    return
  }

  // Menu: rebuilt only when the set of visible entries changes, so that
  // keyboard focus inside the list survives routine server responses.
  var visibleKeys:string[] = []
  for (let i = 0; i < menuItems.length; i++) {
    menuItems[i].id = i
    if (menuItemVisible(menuItems[i])) {
      visibleKeys.push(menuItems[i].menuKey)
    }
  }

  if (visibleKeys.join(",") != renderedMenuKeys(menu).join(",")) {
    menu.innerHTML = ""
    for (let i = 0; i < menuItems.length; i++) {
      if (menuItemVisible(menuItems[i])) {
        menuItems[i].createItem()
      }
    }
  }

  if (ACTIVE_MENU_ID.length > 0 && document.getElementById(ACTIVE_MENU_ID)) {
    setActiveMenu(ACTIVE_MENU_ID)
  }

  var content = document.getElementById("content")
  if (ACTIVE_MENU_ID.length == 0 && content != null) {

    if (content.innerHTML.replace(/\\s/g, "").length == 0) {
      var firstItem = menu.getElementsByTagName("LI")[0] as HTMLElement
      if (firstItem != undefined) {
        firstItem.click()
      }
    }

  }

  return
}