/*

Markets are a function of time. When watching them, end users must be positioned at one particular point in time. The system currently allows users
to position themselves at any time they like.

In the future, it will be usefull to explore markets and compare them at different times simultaneously. Anticipating that future this module exists.
All the timelineCharts that depand on a datetime are children of this object Time Machine. In the future we will allow users to have more than one Time Machine,
each one with it own timelineCharts, and each one positioned at an especific point in titme.

*/

function newTimeMachine () {
  const MODULE_NAME = 'Time Machine'
  const logger = newWebDebugLog()
  logger.fileName = MODULE_NAME

  let timeFrame = INITIAL_TIME_PERIOD

  let thisObject = {
    container: undefined,
    timeScale: undefined,
    rateScale: undefined,
    payload: undefined,
    timelineCharts: [],
    fitFunction: fitFunction,
    physics: physics,
    draw: draw,
    drawBackground: drawBackground,
    drawForeground: drawForeground,
    getContainer: getContainer,     // returns the inner most container that holds the point received by parameter.
    initialize: initialize,
    finalize: finalize
  }

  let timeMachineCoordinateSystem = newCoordinateSystem()

  let mouse = {
    position: {
      x: 0,
      y: 0
    }
  }

  let drawScales = false
  let syncWithDesignerLoop = 0
  let timelineChartsMap = new Map()

  let onMouseOverEventSuscriptionId
  let onMouseNotOverEventSuscriptionId
  let timeScaleEventSuscriptionId
  let timeScaleMouseOverEventSuscriptionId
  let rateScaleEventSuscriptionId
  let rateScaleMouseOverEventSuscriptionId
  let timeFrameScaleEventSuscriptionId
  let timeFrameScaleMouseOverEventSuscriptionId

  setupContainer()
  return thisObject

  function setupContainer () {
    thisObject.container = newContainer()
    thisObject.container.initialize(MODULE_NAME)
    thisObject.container.fitFunction = thisObject.fitFunction
    thisObject.container.isDraggeable = true
    thisObject.container.insideViewport = true
    thisObject.container.detectMouseOver = true

    thisObject.container.frame.width = TIME_MACHINE_WIDTH
    thisObject.container.frame.height = TIME_MACHINE_HEIGHT
  }

  function finalize () {
    if (thisObject.timeScale !== undefined) {
      finalizeTimeScale()
    }

    if (thisObject.rateScale !== undefined) {
      finalizeRateScale()
    }

    if (thisObject.timeFrameScale !== undefined) {
      finalizeTimeFrameScale()
    }

    thisObject.container.eventHandler.stopListening(onMouseOverEventSuscriptionId)
    thisObject.container.eventHandler.stopListening(onMouseNotOverEventSuscriptionId)

    for (let i = 0; i < thisObject.timelineCharts.length; i++) {
      let timelineChart = thisObject.timelineCharts[i]
      timelineChart.container.eventHandler.stopListening(timelineChart.onChildrenMouseOverEventSuscriptionId)
      timelineChart.finalize()
    }

    thisObject.timelineCharts = undefined
    timelineChartsMap = undefined

    thisObject.fitFunction = undefined

    thisObject.container.finalize()
    thisObject.container = undefined

    thisObject.payload = undefined
    mouse = undefined
  }

  function finalizeTimeScale () {
    if (thisObject.timeScale === undefined) { return }

    thisObject.timeScale.container.eventHandler.stopListening(timeScaleEventSuscriptionId)
    thisObject.timeScale.container.eventHandler.stopListening(timeScaleMouseOverEventSuscriptionId)
    thisObject.timeScale.finalize()
    thisObject.timeScale = undefined
  }

  function finalizeRateScale () {
    if (thisObject.rateScale === undefined) { return }

    thisObject.rateScale.container.eventHandler.stopListening(rateScaleEventSuscriptionId)
    thisObject.rateScale.container.eventHandler.stopListening(rateScaleMouseOverEventSuscriptionId)
    thisObject.rateScale.finalize()
    thisObject.rateScale = undefined
  }

  function finalizeTimeFrameScale () {
    if (thisObject.timeFrameScale === undefined) { return }

    thisObject.timeFrameScale.container.eventHandler.stopListening(timeFrameScaleEventSuscriptionId)
    thisObject.timeFrameScale.container.eventHandler.stopListening(timeFrameScaleMouseOverEventSuscriptionId)
    thisObject.timeFrameScale.finalize()
    thisObject.timeFrameScale = undefined
  }

  function initialize (callBackFunction) {
    timeFrame = INITIAL_TIME_PERIOD
    loadFrame(thisObject.payload, thisObject.container.frame)

    recalculateCoordinateSystem()

    onMouseOverEventSuscriptionId = thisObject.container.eventHandler.listenToEvent('onMouseOver', onMouseOver)

    function onMouseOver (event) {
      drawScales = true

      mouse.position.x = event.x
      mouse.position.y = event.y

      if (thisObject.timeScale !== undefined) {
        thisObject.timeScale.onMouseOverSomeTimeMachineContainer(event)
      }
      if (thisObject.rateScale !== undefined) {
        thisObject.rateScale.onMouseOverSomeTimeMachineContainer(event)
      }
      if (thisObject.timeFrameScale !== undefined) {
        thisObject.timeFrameScale.onMouseOverSomeTimeMachineContainer(event)
      }
    }

    onMouseNotOverEventSuscriptionId = thisObject.container.eventHandler.listenToEvent('onMouseNotOver', onMouseNotOver)

    function onMouseNotOver (event) {
      drawScales = false

      if (thisObject.timeScale !== undefined) {
        thisObject.timeScale.visible = false
      }
      if (thisObject.rateScale !== undefined) {
        thisObject.rateScale.visible = false
      }
      if (thisObject.timeFrameScale !== undefined) {
        thisObject.timeFrameScale.visible = false
      }
    }

    callBackFunction(GLOBAL.DEFAULT_OK_RESPONSE)
  }

  function initializeTimeScale () {
    thisObject.timeScale = newTimeScale()
    thisObject.timeScale.fitFunction = thisObject.fitFunction
    thisObject.timeScale.payload = thisObject.payload.node.timeScale.payload

    timeScaleEventSuscriptionId = thisObject.timeScale.container.eventHandler.listenToEvent('Lenght Percentage Changed', function (event) {
      thisObject.container.frame.width = TIME_MACHINE_WIDTH * event.value / 100
      recalculateCoordinateSystem()
      if (event.isUserAction === true) {
        moveToUserPosition(thisObject.container, timeMachineCoordinateSystem, false, true, event.mousePosition, false, true)
      }
      thisObject.container.eventHandler.raiseEvent('Dimmensions Changed', event)
    })

    thisObject.timeScale.initialize(timeMachineCoordinateSystem, thisObject.container)

    timeScaleMouseOverEventSuscriptionId = thisObject.timeScale.container.eventHandler.listenToEvent('onMouseOverScale', timeScaleMouseOver)

    function timeScaleMouseOver (event) {
      thisObject.container.eventHandler.raiseEvent('onMouseOver', event)
    }
  }

  function initializeRateScale () {
    thisObject.rateScale = newRateScale()
    thisObject.rateScale.fitFunction = thisObject.fitFunction
    thisObject.rateScale.payload = thisObject.payload.node.rateScale.payload

    rateScaleEventSuscriptionId = thisObject.rateScale.container.eventHandler.listenToEvent('Height Percentage Changed', function (event) {
      thisObject.container.frame.height = TIME_MACHINE_HEIGHT * event.value / 100
      recalculateCoordinateSystem()
      if (event.isUserAction === true) {
        moveToUserPosition(thisObject.container, timeMachineCoordinateSystem, true, false, event.mousePosition, false, true)
      }
      thisObject.container.eventHandler.raiseEvent('Dimmensions Changed', event)
    })

    thisObject.rateScale.initialize(timeMachineCoordinateSystem, thisObject.container)

    rateScaleMouseOverEventSuscriptionId = thisObject.rateScale.container.eventHandler.listenToEvent('onMouseOverScale', rateScaleMouseOver)

    function rateScaleMouseOver (event) {
      thisObject.container.eventHandler.raiseEvent('onMouseOver', event)
    }
  }

  function initializeTimeFrameScale () {
    thisObject.timeFrameScale = newTimeFrameScale()
    thisObject.timeFrameScale.fitFunction = thisObject.fitFunction
    thisObject.timeFrameScale.payload = thisObject.payload.node.timeFrameScale.payload

    timeFrameScaleEventSuscriptionId = thisObject.timeFrameScale.container.eventHandler.listenToEvent('Time Frame Changed', function (event) {
      let currentTimeFrame = timeFrame
      timeFrame = event.timeFrame
      if (timeFrame !== currentTimeFrame) {
        for (let i = 0; i < thisObject.timelineCharts.length; i++) {
          let timelineChart = thisObject.timelineCharts[i]
          timelineChart.upstreamTimeFrame = timeFrame
          if (timelineChart.timeFrameScale === undefined) {
            timelineChart.setTimeFrame(timeFrame)
          }
        }
      }
    })

    thisObject.timeFrameScale.initialize(timeMachineCoordinateSystem, thisObject.container)

    timeFrameScaleMouseOverEventSuscriptionId = thisObject.timeFrameScale.container.eventHandler.listenToEvent('onMouseOverScale', timeFrameScaleMouseOver)

    function timeFrameScaleMouseOver (event) {
      thisObject.container.eventHandler.raiseEvent('onMouseOver', event)
    }
  }

  function getContainer (point, purpose) {
    let container

    if (thisObject.rateScale !== undefined) {
      container = thisObject.rateScale.getContainer(point)
      if (container !== undefined) {
        if (container.isForThisPurpose(purpose)) {
          return container
        }
      }
    }

    if (thisObject.timeScale !== undefined) {
      container = thisObject.timeScale.getContainer(point)
      if (container !== undefined) {
        if (container.isForThisPurpose(purpose)) {
          return container
        }
      }
    }

    if (thisObject.timeFrameScale !== undefined) {
      container = thisObject.timeFrameScale.getContainer(point)
      if (container !== undefined) {
        if (container.isForThisPurpose(purpose)) {
          return container
        }
      }
    }

    for (let i = 0; i < thisObject.timelineCharts.length; i++) {
      container = thisObject.timelineCharts[i].getContainer(point, purpose)
      if (container !== undefined) {
        if (container.isForThisPurpose(purpose)) {
          if (thisObject.container.frame.isThisPointHere(point) === true) {
            return container
          }
        }
      }
    }

    if (thisObject.container.frame.isThisPointHere(point) === true) {
      return thisObject.container
    }
  }

  function fitFunction (point, fullVisible, margin, topMargin, bottomMargin) {
     /* We prevent a point to be out of the container AND out of the Chart Space in general */

    let returnPoint = {
      x: point.x,
      y: point.y
    }

    let upCorner = {
      x: 0,
      y: 0
    }

    let bottonCorner = {
      x: thisObject.container.frame.width,
      y: thisObject.container.frame.height
    }

    upCorner = transformThisPoint(upCorner, thisObject.container)
    bottonCorner = transformThisPoint(bottonCorner, thisObject.container)

    /* Checking against the container limits. */
    if (margin === undefined) { margin = 0 }
    if (topMargin === undefined) { topMargin = 0 }
    if (bottomMargin === undefined) { bottomMargin = 0 }

    if (returnPoint.x - margin < upCorner.x) { returnPoint.x = upCorner.x + margin }
    if (returnPoint.x + margin > bottonCorner.x) { returnPoint.x = bottonCorner.x - margin }
    if (returnPoint.y - margin - topMargin < upCorner.y) { returnPoint.y = upCorner.y + margin + topMargin }
    if (returnPoint.y + margin + bottomMargin > bottonCorner.y) { returnPoint.y = bottonCorner.y - margin - bottomMargin }

    returnPoint = canvas.chartSpace.fitFunction(returnPoint, fullVisible)

    return returnPoint
  }

  function physics () {
    thisObjectPhysics()
    childrenPhysics()
    syncWithDesigner()
    saveFrame(thisObject.payload, thisObject.container.frame)
  }

  function syncWithDesigner () {
    syncWithDesignerTimelineCharts()
    syncWithDesignerScales()
  }

  function syncWithDesignerScales () {
    if (thisObject.payload.node === undefined) {
      finalizeTimeScale()
      finalizeRateScale()
      finalizeTimeFrameScale()
      return
    }
    if (thisObject.payload.node.timeScale === undefined && thisObject.timeScale !== undefined) {
      finalizeTimeScale()
    }
    if (thisObject.payload.node.timeScale !== undefined && thisObject.timeScale === undefined) {
      initializeTimeScale()
    }
    if (thisObject.payload.node.rateScale === undefined && thisObject.rateScale !== undefined) {
      finalizeRateScale()
    }
    if (thisObject.payload.node.rateScale !== undefined && thisObject.rateScale === undefined) {
      initializeRateScale()
    }
    if (thisObject.payload.node.timeFrameScale === undefined && thisObject.timeFrameScale !== undefined) {
      finalizeTimeFrameScale()
    }
    if (thisObject.payload.node.timeFrameScale !== undefined && thisObject.timeFrameScale === undefined) {
      initializeTimeFrameScale()
    }
  }

  function syncWithDesignerTimelineCharts () {
    syncWithDesignerLoop = syncWithDesignerLoop + 0.00000000001

    for (let j = 0; j < thisObject.payload.node.timelineCharts.length; j++) {
      let node = thisObject.payload.node.timelineCharts[j]
      let timelineChart = timelineChartsMap.get(node.id)
      if (timelineChart === undefined) {
              /* The timeline timelineChart node is new, thus we need to initialize a new timelineChart */
        initializeTimelineChart(node, syncWithDesignerLoop)
      } else {
              /* The time machine already exists, we tag it as existing at the current loop. */
        timelineChart.syncWithDesignerLoop = syncWithDesignerLoop
      }
    }

    /* We check all the timeMachines we have to see if we need to remove any of them */
    for (let i = 0; i < thisObject.timelineCharts.length; i++) {
      let timelineChart = thisObject.timelineCharts[i]
      if (timelineChart.syncWithDesignerLoop < syncWithDesignerLoop) {
        /* Must be removed */
        timelineChart.container.eventHandler.stopListening(timelineChart.onChildrenMouseOverEventSuscriptionId)
        timelineChart.finalize()
        timelineChartsMap.delete(timelineChart.nodeId)
        thisObject.timelineCharts.splice(i, 1)
        /* We remove one at the time */
        return
      }
    }

    function initializeTimelineChart (node, syncWithDesignerLoop) {
      let timelineChart = newTimelineChart()
      timelineChart.syncWithDesignerLoop = syncWithDesignerLoop
      timelineChart.payload = node.payload
      timelineChart.nodeId = node.id
      timelineChartsMap.set(node.id, timelineChart)
      timelineChart.payload.uiObject.setValue('Loading...')

      /* Setting up the new timeline timelineChart. */
      timelineChart.container.connectToParent(thisObject.container, true, true, false, true, true, true, false, false, true)
      timelineChart.container.fitFunction = thisObject.container.fitFunction
      timelineChart.fitFunction = thisObject.fitFunction
      timelineChart.container.frame.height = thisObject.container.frame.height
      timelineChart.container.frame.position.x = thisObject.container.frame.width / 2 - timelineChart.container.frame.width / 2
      timelineChart.container.frame.position.y = 0
      timelineChart.initialize(timeMachineCoordinateSystem)

      /* we will store the event suscription id as a property of the timelineChart, to avoid keeping it an a separate array */
      timelineChart.onChildrenMouseOverEventSuscriptionId = timelineChart.container.eventHandler.listenToEvent('onChildrenMouseOver', onChildrenMouseOver)

      thisObject.timelineCharts.push(timelineChart)
      timelineChart.payload.uiObject.setValue('')

      function onChildrenMouseOver (event) {
        thisObject.container.eventHandler.raiseEvent('onMouseOver', event)
      }
    }
  }

  function thisObjectPhysics () {
    /* Screen Corner Date Calculation */

    let point = {
      x: 0,
      y: 0
    }

    let cornerDate = getDateFromPoint(point, thisObject.container, timeMachineCoordinateSystem)
    cornerDate = new Date(cornerDate)
    window.localStorage.setItem('Date @ Screen Corner', cornerDate.toUTCString())
  }

  function childrenPhysics () {
    if (thisObject.timeScale !== undefined) {
      thisObject.timeScale.physics()
    }
    if (thisObject.rateScale !== undefined) {
      thisObject.rateScale.physics()
    }
    if (thisObject.timeFrameScale !== undefined) {
      thisObject.timeFrameScale.physics()
    }

    for (let i = 0; i < thisObject.timelineCharts.length; i++) {
      let timelineChart = thisObject.timelineCharts[i]
      timelineChart.physics()
    }
  }

  function drawBackground () {
    if (thisObject.container.frame.isInViewPort()) {
      for (let i = 0; i < thisObject.timelineCharts.length; i++) {
        let timelineChart = thisObject.timelineCharts[i]
        timelineChart.drawBackground()
      }
    }
  }

  function draw () {
    if (thisObject.container.frame.isInViewPort()) {
      for (let i = 0; i < thisObject.timelineCharts.length; i++) {
        let timelineChart = thisObject.timelineCharts[i]
        timelineChart.draw()
      }

      if (drawScales === true) {
        if (thisObject.timeScale !== undefined) { thisObject.timeScale.draw() }
        if (thisObject.timeFrameScale !== undefined) { thisObject.timeFrameScale.draw() }
        if (thisObject.rateScale !== undefined) { thisObject.rateScale.draw() }
      }

      thisObject.container.frame.draw(false, true, false, thisObject.fitFunction)
    } else {
      let icon = canvas.designerSpace.iconByUiObjectType.get(thisObject.payload.node.type)
      if (icon !== undefined) {
        if (icon.canDrawIcon === true) {
          let imageSize = 40
          let imagePosition = {
            x: thisObject.container.frame.width / 2,
            y: thisObject.container.frame.height / 2
          }

          imagePosition = transformThisPoint(imagePosition, thisObject.container)
          imagePosition = thisObject.fitFunction(imagePosition, true)

          browserCanvasContext.drawImage(
             icon,
             imagePosition.x - imageSize / 2,
             imagePosition.y - imageSize / 2,
             imageSize,
             imageSize)
        }
      }
    }
  }

  function drawForeground () {
    if (thisObject.container.frame.isInViewPort()) {
      for (let i = 0; i < thisObject.timelineCharts.length; i++) {
        let timelineChart = thisObject.timelineCharts[i]
        timelineChart.drawForeground()
      }

      if (drawScales === true) {
        if (thisObject.timeScale !== undefined) { thisObject.timeScale.drawForeground() }
        if (thisObject.timeFrameScale !== undefined) { thisObject.timeFrameScale.drawForeground() }
        if (thisObject.rateScale !== undefined) { thisObject.rateScale.drawForeground() }
      }
    }
  }

  function recalculateCoordinateSystem () {
    let minValue = {
      x: MIN_PLOTABLE_DATE.valueOf(),
      y: 0
    }

    let maxValue = {
      x: MAX_PLOTABLE_DATE.valueOf(),
      y: nextPorwerOf10(USDT_BTC_HTH) / 4
    }

    timeMachineCoordinateSystem.initialize(
          minValue,
          maxValue,
          thisObject.container.frame.width,
          thisObject.container.frame.height
      )
  }
}