function isNodeEvent(msg, field as string) as boolean
    return type(msg) = "roSGNodeEvent" and msg.getField() = field
end function


function getMsgPicker(msg, subnode = "" as string) as object
    node = msg.getRoSGNode()
    ' Subnode allows for handling alias messages
    if subnode <> ""
        node = node.findNode(subnode)
    end if
    coords = node.rowItemSelected
    target = node.content.getChild(coords[0]).getChild(coords[1])
    return target
end function

function getButton(msg, subnode = "buttons" as string) as object
    buttons = msg.getRoSGNode().findNode(subnode)
    if buttons = invalid then return invalid
    active_button = buttons.focusedChild
    return active_button
end function

function leftPad(base as string, fill as string, length as integer) as string
    while len(base) < length
        base = fill + base
    end while
    return base
end function

function ticksToHuman(ticks as longinteger) as string
    totalSeconds = int(ticks / 10000000)
    hours = stri(int(totalSeconds / 3600)).trim()
    minutes = stri(int((totalSeconds - (val(hours) * 3600)) / 60)).trim()
    seconds = stri(totalSeconds - (val(hours) * 3600) - (val(minutes) * 60)).trim()
    if val(hours) > 0 and val(minutes) < 10 then minutes = "0" + minutes
    if val(seconds) < 10 then seconds = "0" + seconds
    r = ""
    if val(hours) > 0 then r = hours + ":"
    r = r + minutes + ":" + seconds
    return r
end function

function secondsToHuman(totalSeconds as integer) as string
    hours = stri(int(totalSeconds / 3600)).trim()
    minutes = stri(int((totalSeconds - (val(hours) * 3600)) / 60)).trim()
    seconds = stri(totalSeconds - (val(hours) * 3600) - (val(minutes) * 60)).trim()
    if val(hours) > 0 and val(minutes) < 10 then minutes = "0" + minutes
    if val(seconds) < 10 then seconds = "0" + seconds
    r = ""
    if val(hours) > 0 then r = hours + ":"
    r = r + minutes + ":" + seconds
    return r
end function

' Format time as 12 or 24 hour format based on system clock setting
function formatTime(time) as string
    hours = time.getHours()
    minHourDigits = 1
    if m.global.device.clockFormat = "12h"
        meridian = "AM"
        if hours = 0
            hours = 12
            meridian = "AM"
        else if hours = 12
            hours = 12
            meridian = "PM"
        else if hours > 12
            hours = hours - 12
            meridian = "PM"
        end if
    else
        ' For 24hr Clock, no meridian and pad hours to 2 digits
        minHourDigits = 2
        meridian = ""
    end if

    return Substitute("{0}:{1} {2}", leftPad(stri(hours).trim(), "0", minHourDigits), leftPad(stri(time.getMinutes()).trim(), "0", 2), meridian)

end function

function div_ceiling(a as integer, b as integer) as integer
    if a < b then return 1
    if int(a / b) = a / b
        return a / b
    end if
    return a / b + 1
end function

'Returns the item selected or -1 on backpress or other unhandled closure of dialog.
function get_dialog_result(dialog, port)
    while dialog <> invalid
        msg = wait(0, port)
        if isNodeEvent(msg, "backPressed")
            return -1
        else if isNodeEvent(msg, "itemSelected")
            return dialog.findNode("optionList").itemSelected
        end if
    end while
    'Dialog has closed outside of this loop, return -1 for failure
    return -1
end function

function lastFocusedChild(obj as object) as object
    if isValid(obj)
        if isValid(obj.focusedChild) and isValid(obj.focusedChild.focusedChild) and LCase(obj.focusedChild.focusedChild.subType()) = "tvepisodes"
            if isValid(obj.focusedChild.focusedChild.lastFocus)
                return obj.focusedChild.focusedChild.lastFocus
            end if
        end if

        child = obj
        for i = 0 to obj.getChildCount()
            if isValid(obj.focusedChild)
                child = child.focusedChild
            end if
        end for
        return child
    else
        return invalid
    end if
end function

function show_dialog(message as string, options = [], defaultSelection = 0) as integer
    lastFocus = lastFocusedChild(m.scene)

    dialog = createObject("roSGNode", "JFMessageDialog")
    if options.count() then dialog.options = options
    if message.len() > 0
        reg = CreateObject("roFontRegistry")
        font = reg.GetDefaultFont()
        dialog.fontHeight = font.GetOneLineHeight()
        dialog.fontWidth = font.GetOneLineWidth(message, 999999999)
        dialog.message = message
    end if

    if defaultSelection > 0
        dialog.findNode("optionList").jumpToItem = defaultSelection
    end if

    dialog.visible = true
    m.scene.appendChild(dialog)
    dialog.setFocus(true)

    port = CreateObject("roMessagePort")
    dialog.observeField("backPressed", port)
    dialog.findNode("optionList").observeField("itemSelected", port)

    result = get_dialog_result(dialog, port)

    m.scene.removeChildIndex(m.scene.getChildCount() - 1)
    lastFocus.setFocus(true)

    return result
end function

function message_dialog(message = "" as string)
    return show_dialog(message, ["OK"])
end function

function option_dialog(options, message = "", defaultSelection = 0) as integer
    return show_dialog(message, options, defaultSelection)
end function

' take an incomplete url string and use it to make educated guesses about
' the complete url. then tests these guesses to see if it can find a jf server
' returns the url of the server it found, or an empty string
function inferServerUrl(url as string) as string
    port = CreateObject("roMessagePort")
    hosts = CreateObject("roAssociativeArray")
    reqs = []
    candidates = urlCandidates(url)
    for each endpoint in candidates
        req = CreateObject("roUrlTransfer")
        reqs.push(req) ' keep in scope outside of loop, else -10001
        req.seturl(endpoint + "/system/info/public")
        req.setMessagePort(port)
        hosts.addreplace(req.getidentity().ToStr(), endpoint)
        if endpoint.Left(8) = "https://"
            req.setCertificatesFile("common:/certs/ca-bundle.crt")
        end if
        req.AsyncGetToString()
    end for
    handled = 0
    timeout = CreateObject("roTimespan")
    while timeout.totalseconds() < 15
        resp = wait(0, port)
        if type(resp) = "roUrlEvent"
            ' TODO
            ' if response code is a 300 redirect then we should return the redirect url
            ' Make sure this happens or make it happen
            if resp.GetResponseCode() = 200 and isJellyfinServer(resp.GetString())
                selectedUrl = hosts.lookup(resp.GetSourceIdentity().ToStr())
                print "Successfully inferred server URL: " selectedUrl
                return selectedUrl
            end if
        end if
        handled += 1
        if handled = reqs.count()
            print "inferServerUrl in utils/misc.brs failed to find a server from the string " url " but did not timeout."
            return ""
        end if
    end while
    print "inferServerUrl in utils/misc.brs failed to find a server from the string " url " because it timed out."
    return ""
end function

function urlCandidates(input as string)
    url = parseUrl(input)
    if url[1] = invalid
        ' a proto wasn't declared
        url = parseUrl("none://" + input)
    end if
    proto = url[1]
    host = url[2]
    port = url[3]
    path = url[4]
    if path.endswith("/", 1) then path = path.Left(len(path) - 1)
    protoCandidates = []
    supportedProtos = ["http:", "https:"] ' appending colons because the regex does
    if proto = "none:" ' the user did not declare a protocol
        ' try every supported proto
        for each supportedProto in supportedProtos
            protoCandidates.push(supportedProto + "//" + host)
        end for
    else
        protoCandidates.push(proto + "//" + host) ' but still allow arbitrary protocols if they are declared
    end if
    final_candidates = []
    if isValid(port) and port <> "" ' if the port is defined just use that
        for each candidate in protoCandidates
            final_candidates.push(candidate + port + path)
        end for
    else ' the port wasnt declared so use default jellyfin and proto ports
        for each candidate in protoCandidates:
            if candidate.startswith("https")
                final_candidates.push(candidate + ":443" + path)
                final_candidates.push(candidate + ":8920" + path)
            else if candidate.startswith("http")
                final_candidates.push(candidate + ":80" + path)
                final_candidates.push(candidate + ":8096" + path)
            end if
        end for
    end if
    return final_candidates
end function

sub setFieldTextValue(field, value)
    node = m.top.findNode(field)
    if node = invalid or value = invalid then return

    ' Handle non strings... Which _shouldn't_ happen, but hey
    if type(value) = "roInt" or type(value) = "Integer"
        value = str(value).trim()
    else if type(value) = "roFloat" or type(value) = "Float"
        value = str(value).trim()
    else if type(value) <> "roString" and type(value) <> "String"
        value = ""
    end if

    node.text = value
end sub

' Returns whether or not passed value is valid
function isValid(input as dynamic) as boolean
    return input <> invalid
end function

' Returns whether or not passed value is valid and not empty
' Accepts a string, or any countable type (arrays and lists)
function isValidAndNotEmpty(input as dynamic) as boolean
    if not isValid(input) then return false
    ' Use roAssociativeArray instead of list so we get access to the doesExist() method
    countableTypes = { "array": 1, "list": 1, "roarray": 1, "roassociativearray": 1, "rolist": 1 }
    inputType = LCase(type(input))
    if inputType = "string" or inputType = "rostring"
        trimmedInput = input.trim()
        return trimmedInput <> ""
    else if countableTypes.doesExist(inputType)
        return input.count() > 0
    else
        print "Called isValidAndNotEmpty() with invalid type: ", inputType
        return false
    end if
end function

' Returns an array from a url = [ url, proto, host, port, subdir+params ]
' If port or subdir are not found, an empty string will be added to the array
' Proto must be declared or array will be empty
function parseUrl(url as string) as object
    rgx = CreateObject("roRegex", "^(.*:)//([A-Za-z0-9\-\.]+)(:[0-9]+)?(.*)$", "")
    return rgx.Match(url)
end function

' Returns true if the string is a loopback, such as 'localhost' or '127.0.0.1'
function isLocalhost(url as string) as boolean
    ' https://stackoverflow.com/questions/8426171/what-regex-will-match-all-loopback-addresses
    rgx = CreateObject("roRegex", "^localhost$|^127(?:\.[0-9]+){0,2}\.[0-9]+$|^(?:0*\:)*?:?0*1$", "i")
    return rgx.isMatch(url)
end function

' Rounds number to nearest integer
function roundNumber(f as float) as integer
    ' BrightScript only has a "floor" round
    ' This compares floor to floor + 1 to find which is closer
    m = int(f)
    n = m + 1
    x = abs(f - m)
    y = abs(f - n)
    if y > x
        return m
    else
        return n
    end if
end function

' Converts ticks to minutes
function getMinutes(ticks) as integer
    ' A tick is .1ms, so 1/10,000,000 for ticks to seconds,
    ' then 1/60 for seconds to minutes... 1/600,000,000
    return roundNumber(ticks / 600000000.0)
end function

'
' Returns whether or not a version number (e.g. 10.7.7) is greater or equal
' to some minimum version allowed (e.g. 10.8.0)
function versionChecker(versionToCheck as string, minVersionAccepted as string)
    leftHand = CreateObject("roLongInteger")
    rightHand = CreateObject("roLongInteger")

    regEx = CreateObject("roRegex", "\.", "")
    version = regEx.Split(versionToCheck)
    if version.Count() < 3
        for i = version.Count() to 3 step 1
            version.AddTail("0")
        end for
    end if

    minVersion = regEx.Split(minVersionAccepted)
    if minVersion.Count() < 3
        for i = minVersion.Count() to 3 step 1
            minVersion.AddTail("0")
        end for
    end if

    leftHand = (version[0].ToInt() * 10000) + (version[1].ToInt() * 100) + (version[2].ToInt() * 10)
    rightHand = (minVersion[0].ToInt() * 10000) + (minVersion[1].ToInt() * 100) + (minVersion[2].ToInt() * 10)

    return leftHand >= rightHand
end function

function findNodeBySubtype(node, subtype)
    foundNodes = []

    for each child in node.getChildren(-1, 0)
        if lcase(child.subtype()) = "group"
            return findNodeBySubtype(child, subtype)
        end if

        if lcase(child.subtype()) = lcase(subtype)
            foundNodes.push({
                node: child,
                parent: node
            })
        end if
    end for

    return foundNodes
end function

function AssocArrayEqual(Array1 as object, Array2 as object) as boolean
    if not isValid(Array1) or not isValid(Array2)
        return false
    end if

    if not Array1.Count() = Array2.Count()
        return false
    end if

    for each key in Array1
        if not Array2.DoesExist(key)
            return false
        end if

        if Array1[key] <> Array2[key]
            return false
        end if
    end for

    return true
end function

' Search string array for search value. Return if it's found
function inArray(haystack, needle) as boolean
    valueToFind = needle

    if LCase(type(valueToFind)) <> "rostring" and LCase(type(valueToFind)) <> "string"
        valueToFind = str(needle)
    end if

    valueToFind = lcase(valueToFind)

    for each item in haystack
        if lcase(item) = valueToFind then return true
    end for

    return false
end function

function toString(input) as string
    if LCase(type(input)) = "rostring" or LCase(type(input)) = "string"
        return input
    end if

    return str(input)
end function

sub startLoadingSpinner()
    m.spinner = createObject("roSGNode", "Spinner")
    m.spinner.translation = "[900, 450]"
    m.spinner.visible = true
    m.scene.appendChild(m.spinner)
end sub

sub startMediaLoadingSpinner()
    dialog = createObject("roSGNode", "ProgressDialog")
    dialog.id = "invisibiledialog"
    dialog.visible = false
    m.scene.dialog = dialog
    startLoadingSpinner()
end sub

sub stopLoadingSpinner()
    if isValid(m.spinner)
        m.spinner.visible = false
    end if
    if isValid(m.scene) and isValid(m.scene.dialog)
        m.scene.dialog.close = true
    end if
end sub

' accepts the raw json string of /system/info/public and returns
' a boolean indicating if ProductName is "Jellyfin Server"
function isJellyfinServer(si as string) as boolean
    d = ParseJson(si)
    if isValid(d) and isValid(d.ProductName)
        return d.ProductName = "Jellyfin Server"
    end if
    return False
end function