---------------------------------------------------------
-- general setup
---------------------------------------------------------

ENCOUNTER_DECK_POS = {-3.93, 1, 5.76}
ENCOUNTER_DECK_DISCARD_POSITION = {-3.85, 1, 10.38}

-- optionPanel data
optionPanel = {}

-- GUID of data helper
DATA_HELPER_GUID = "708279"

-- GUIDs that will not be interactable (e.g. parts of the table)
local NOT_INTERACTABLE = {
  "6161b4", -- Decoration-Map
  "721ba2", -- PlayArea
  "9f334f", -- MythosArea
  "463022", -- Panel behind tentacle stand
  "f182ee", -- InvestigatorCount
  "7bff34", -- Tentacle stand
  "8646eb", -- horizontal border left
  "75937e", -- horizontal border right
  "612072", -- vertical border left
  "975c39", -- vertical border right
}

local chaosTokens = {}
local chaosTokensLastMat = nil
local IS_RESHUFFLING = false
local bagSearchers = {}
local MAT_COLORS = {"White", "Orange", "Green", "Red"}
local hideTitleSplashWaitFunctionId = nil
local playmatApi = require("playermat/PlaymatApi")
local tokenManager = require("core/token/TokenManager")
local playAreaAPI = require("core/PlayAreaApi")
local soundCubeApi = require("core/SoundCubeApi")
local mythosAreaApi = require("core/MythosAreaApi")
local tokenArrangerApi = require("accessories/TokenArrangerApi")
local blessCurseManagerApi = require("chaosbag/BlessCurseManagerApi")

-- online functionality related variables
local MOD_VERSION = "3.1.0"
local SOURCE_REPO = 'https://raw.githubusercontent.com/chr1z93/loadable-objects/main'
local library, requestObj, modMeta, notificationVisible
local acknowledgedUpgradeVersions = {}

---------------------------------------------------------
-- data for tokens
---------------------------------------------------------

TOKEN_DATA = {
  damage   = {image = "http://cloud-3.steamusercontent.com/ugc/1758068501357115146/903D11AAE7BD5C254C8DC136E9202EE516289DEA/", scale = {0.17, 0.17, 0.17}},
  horror   = {image = "http://cloud-3.steamusercontent.com/ugc/1758068501357163535/6D9E0756503664D65BDB384656AC6D4BD713F5FC/", scale = {0.17, 0.17, 0.17}},
  resource = {image = "http://cloud-3.steamusercontent.com/ugc/1758068501357192910/11DDDC7EF621320962FDCF3AE3211D5EDC3D1573/", scale = {0.17, 0.17, 0.17}},
  doom     = {image = "https://i.imgur.com/EoL7yaZ.png", scale = {0.17, 0.17, 0.17}},
  clue     = {image = "http://cloud-3.steamusercontent.com/ugc/1758068501357164917/1D06F1DC4D6888B6F57124BD2AFE20D0B0DA15A8/", scale = {0.15, 0.15, 0.15}}
}

ID_URL_MAP = {
  ['blue']    = {name = "Elder Sign", url = 'https://i.imgur.com/nEmqjmj.png'},
  ['p1']      = {name = "+1", url = 'https://i.imgur.com/uIx8jbY.png'},
  ['0']       = {name = "0", url = 'https://i.imgur.com/btEtVfd.png'},
  ['m1']      = {name = "-1", url = 'https://i.imgur.com/w3XbrCC.png'},
  ['m2']      = {name = "-2", url = 'https://i.imgur.com/bfTg2hb.png'},
  ['m3']      = {name = "-3", url = 'https://i.imgur.com/yfs8gHq.png'},
  ['m4']      = {name = "-4", url = 'https://i.imgur.com/qrgGQRD.png'},
  ['m5']      = {name = "-5", url = 'https://i.imgur.com/3Ym1IeG.png'},
  ['m6']      = {name = "-6", url = 'https://i.imgur.com/c9qdSzS.png'},
  ['m7']      = {name = "-7", url = 'https://i.imgur.com/4WRD42n.png'},
  ['m8']      = {name = "-8", url = 'https://i.imgur.com/9t3rPTQ.png'},
  ['skull']   = {name = "Skull", url = 'https://i.imgur.com/stbBxtx.png'},
  ['cultist'] = {name = "Cultist", url = 'https://i.imgur.com/VzhJJaH.png'},
  ['tablet']  = {name = "Tablet", url = 'https://i.imgur.com/1plY463.png'},
  ['elder']   = {name = "Elder Thing", url = 'https://i.imgur.com/ttnspKt.png'},
  ['red']     = {name = "Auto-fail", url = 'https://i.imgur.com/lns4fhz.png'},
  ['bless']   = {name = "Bless", url = 'http://cloud-3.steamusercontent.com/ugc/1655601092778627699/339FB716CB25CA6025C338F13AFDFD9AC6FA8356/'},
  ['curse']   = {name = "Curse", url = 'http://cloud-3.steamusercontent.com/ugc/1655601092778636039/2A25BD38E8C44701D80DD96BF0121DA21843672E/'},
	['frost']   = {name = "Frost", url = 'http://cloud-3.steamusercontent.com/ugc/1858293462583104677/195F93C063A8881B805CE2FD4767A9718B27B6AE/'}
}

---------------------------------------------------------
-- data for chaos token stat tracker
---------------------------------------------------------

local MAT_GUID_TO_COLOR = {
  ["Overall"] = "Overall",
  ["8b081b"]  = "White",
  ["bd0ff4"]  = "Orange",
  ["383d8b"]  = "Green",
  ["0840d5"]  = "Red"
}

local tokenDrawingStats = {
  ["Overall"] = {},
  ["8b081b"]  = {},
  ["bd0ff4"]  = {},
  ["383d8b"]  = {},
  ["0840d5"]  = {}
}

---------------------------------------------------------
-- general code
---------------------------------------------------------

-- saving state of optionPanel to restore later
function onSave() return JSON.encode({ optionPanel = optionPanel, acknowledgedUpgradeVersions = acknowledgedUpgradeVersions }) end

function onLoad(savedData)
  if savedData then
    loadedData = JSON.decode(savedData)
    optionPanel = loadedData.optionPanel
    acknowledgedUpgradeVersions = loadedData.acknowledgedUpgradeVersions
    updateOptionPanelState()
  else
    print("Saved state could not be found!")
  end

  for _, guid in ipairs(NOT_INTERACTABLE) do
    local obj = getObjectFromGUID(guid)
    if obj ~= nil then obj.interactable = false end
  end

  getModVersion()
  math.randomseed(os.time())
end

---------------------------------------------------------
-- encounter card drawing
---------------------------------------------------------

function isDeck(x) return x.tag == 'Deck' end

function isCardOrDeck(x) return x.tag == 'Card' or x.tag == 'Deck' end

-- Event hook for any object search.  When chaos tokens are manipulated while the chaos bag
-- container is being searched, a TTS bug can cause tokens to duplicate or vanish.  We lock the
-- chaos bag during search operations to avoid this.
function onObjectSearchStart(object, playerColor)
  chaosbag = findChaosBag()
  if object == chaosbag then
    bagSearchers[playerColor] = true
  end
end

-- Event hook for any object search.  When chaos tokens are manipulated while the chaos bag
-- container is being searched, a TTS bug can cause tokens to duplicate or vanish.  We lock the
-- chaos bag during search operations to avoid this.
function onObjectSearchEnd(object, playerColor)
  chaosbag = findChaosBag()
  if object == chaosbag then
    bagSearchers[playerColor] = nil
  end
end

-- Pass object enter container events to the PlayArea to clear vector lines from dragged cards.
-- This requires the try method as cards won't exist any more after they enter a deck, so the lines
-- can't be cleared.
function tryObjectEnterContainer(container, object)
  playAreaAPI.tryObjectEnterContainer(container, object)
  return true
end

function drawEncountercard(params)
  local position = params[1]
  local rotation = params[2]
  local alwaysFaceUp = params[3]
  local card
  local items = findInRadiusBy(ENCOUNTER_DECK_POS, 4, isCardOrDeck)
  if #items > 0 then
    for _, v in ipairs(items) do
      if v.tag == 'Deck' then
        card = v.takeObject({index = 0})
        break
      end
    end
    -- we didn't find the deck so just pull the first thing we did find
    if card == nil then card = items[1] end
    actualEncounterCardDraw(card, params)
  else
    -- nothing here, time to reshuffle
    reshuffleEncounterDeck(params)
  end
end

function actualEncounterCardDraw(card, params)
  local position = params[1]
  local rotation = params[2]
  local alwaysFaceUp = params[3]
  local faceUpRotation = 0
  if not alwaysFaceUp then
    local metadata = JSON.decode(card.getGMNotes()) or {}
    if metadata.hidden or getObjectFromGUID(DATA_HELPER_GUID).call('checkHiddenCard', card.getName()) then
      faceUpRotation = 180
    end
  end
  card.setPositionSmooth(position, false, false)
  card.setRotationSmooth({0, rotation.y, faceUpRotation}, false, false)
end

function reshuffleEncounterDeck(params)
  -- finishes moving the deck back and draws a card
  local function move(deck)
    deck.setPositionSmooth({ENCOUNTER_DECK_POS[1], ENCOUNTER_DECK_POS[2] + 2, ENCOUNTER_DECK_POS[3]}, false, true)
    actualEncounterCardDraw(deck.takeObject({index=0}), params)
    Wait.time(function() IS_RESHUFFLING = false end, 1)
  end
  -- bail out if we're mid reshuffle
  if IS_RESHUFFLING then return end
  local discarded = findInRadiusBy(ENCOUNTER_DECK_DISCARD_POSITION, 4, isDeck)
  if #discarded > 0 then
    IS_RESHUFFLING = true
    local deck = discarded[1]
    if not deck.is_face_down then deck.flip() end
    deck.shuffle()
    Wait.time(|| move(deck), 0.3)
  else
    printToAll("Couldn't find encounter discard pile to reshuffle.", {1, 0, 0})
  end
end

function findInRadiusBy(pos, radius, filter)
  local objList = Physics.cast({
    origin = pos,
    direction = {0, 1, 0},
    type = 2,
    size = {radius, radius, radius},
    max_distance = 0
  })

  local filteredList = {}
  for _, obj in ipairs(objList) do
    if filter and filter(obj.hit_object) then
      table.insert(filteredList, obj.hit_object)
    end
  end
  return filteredList
end

---------------------------------------------------------
-- chaos token drawing
---------------------------------------------------------

-- checks scripting zone for chaos bag (also called by a lot of objects!)
function findChaosBag()
  local chaosbag_zone = getObjectFromGUID("83ef06")

  -- error handling: scripting zone not found
  if chaosbag_zone == nil then
    printToAll("Zone for chaos bag detection couldn't be found.", "Red")
    return
  end

  for _, item in ipairs(chaosbag_zone.getObjects()) do
    if item.getDescription() == "Chaos Bag" then
      return item
    end
  end

  -- error handling: chaos bag not found
  printToAll("Chaos bag couldn't be found.", "Red")
end

function returnChaosTokens()
  for _, token in pairs(chaosTokens) do
    if token ~= nil then chaosbag.putObject(token) end
  end
  chaosTokens = {}
end

-- Checks to see if the chaos bag can be manipulated.  If a player is searching the bag when tokens
-- are drawn or replaced a TTS bug can cause those tokens to vanish.  Any functions which change the
-- contents of the bag should check this method before doing so.
-- This method will broadcast a message to all players if the bag is being searched.
---@return Boolean.  True if the bag is manipulated, false if it should be blocked.
function canTouchChaosTokens()
  for color, searching in pairs(bagSearchers) do
    if searching then
      broadcastToAll("Someone is searching the chaos bag, can't touch the tokens.", "Red")
      return false
    end
  end
  return true
end

-- called by playermats (by the "Draw chaos token" button)
function drawChaosToken(params)
  if not canTouchChaosTokens() then return end

  local mat = params[1]
  local tokenOffset = params[2]
  local isRightClick = params[3]
  chaosbag = findChaosBag()

  -- return token(s) on other playmat first
  if chaosTokensLastMat ~= nil and chaosTokensLastMat ~= mat and #chaosTokens ~= 0 then
    returnChaosTokens()
    chaosTokensLastMat = nil
    return
  end

  chaosTokensLastMat = mat

  -- if we have left clicked and have no tokens OR if we have right clicked
  if isRightClick or #chaosTokens == 0 then
    if #chaosbag.getObjects() == 0 then return end
    chaosbag.shuffle()

    -- add the token to the list, compute new position based on list length
    tokenOffset[1] = tokenOffset[1] + (0.17 * #chaosTokens)
    local token = chaosbag.takeObject({
      index = 0,
      position = mat.positionToWorld(tokenOffset),
      rotation = mat.getRotation()
    })

    -- get data for token description
    local name = token.getName()
    local tokenData = mythosAreaApi.returnTokenData().tokenData or {}
    local specificData = tokenData[name] or {}
    token.setDescription(specificData.description or "")

    -- track the chaos token (for stat tracker and future returning)
    trackChaosToken(name, mat.getGUID())
    chaosTokens[#chaosTokens + 1] = token
    return
  else
    returnChaosTokens()
  end
end

---------------------------------------------------------
-- token spawning
---------------------------------------------------------

-- DEPRECATED.  Use TokenManager instead.
-- Spawns a single token.
---@param params Table.  Array with arguments to the method.  1 = position, 2 = type, 3 = rotation
function spawnToken(params)
  return tokenManager.spawnToken(params[1], params[2], params[3])
end

---------------------------------------------------------
-- chaos token stat tracker
---------------------------------------------------------

function trackChaosToken(tokenName, matGUID)
  tokenDrawingStats["Overall"][tokenName] = (tokenDrawingStats["Overall"][tokenName] or 0) + 1
  tokenDrawingStats[matGUID][tokenName]   = (tokenDrawingStats[matGUID][tokenName] or 0) + 1
end

-- Left-click: print stats, Right-click: reset stats
function handleStatTrackerClick(_, _, isRightClick)
  if isRightClick then
    for key, _ in pairs(tokenDrawingStats) do
      tokenDrawingStats[key] = {}
    end
  else
    local squidKing = "Nobody"
    local maxSquid  = 0
    local playerColor, playerName
 
    for key, personalStats in pairs(tokenDrawingStats) do
      if personalStats ~= {} then
        if key == "Overall" then
          playerColor = "White"
          playerName = "Overall"
        else
          playerColor = playmatApi.getPlayerColor(MAT_GUID_TO_COLOR[key])
          playerName = Player[playerColor].steam_name or playerColor

          local playerSquidCount = personalStats["Auto-fail"] or 0
          if playerSquidCount > maxSquid then
            squidKing = playerName
            maxSquid = playerSquidCount
          end
        end
      
        printToAll("------------------------------")
        printToAll(playerName ..  " Stats", playerColor)
      
        for tokenName, value in pairs(personalStats) do
          if value then
            printToAll(tokenName .. ': ' .. tostring(value))
          end
        end
      end
    end
    printToAll("------------------------------")
    printToAll(squidKing .. " is an auto-fail magnet.", {255, 0, 0})
  end
end

---------------------------------------------------------
-- Difficulty selector script
---------------------------------------------------------

-- called for button creation on the difficulty selectors
---@param object object Usually "self"
---@param key string Name of the scenario
function createSetupButtons(args)
  local data = getDataValue('modeData', args.key)
  if data ~= nil then
    local buttonParameters          = {}
    buttonParameters.function_owner = args.object
    buttonParameters.position       = {0, 0.1, -0.15}
    buttonParameters.scale          = {0.47, 1, 0.47}
    buttonParameters.height         = 200
    buttonParameters.width          = 1150
    buttonParameters.color          = {0.87, 0.8, 0.7}

    if data.easy ~= nil then
      buttonParameters.label = "Easy"
      buttonParameters.click_function = "easyClick"
      args.object.createButton(buttonParameters)
      buttonParameters.position[3] = buttonParameters.position[3] + 0.20
    end

    if data.normal ~= nil then
      buttonParameters.label = "Standard"
      buttonParameters.click_function = "normalClick"
      args.object.createButton(buttonParameters)
      buttonParameters.position[3] = buttonParameters.position[3] + 0.20
    end

    if data.hard ~= nil then
      buttonParameters.label = "Hard"
      buttonParameters.click_function = "hardClick"
      args.object.createButton(buttonParameters)
      buttonParameters.position[3] = buttonParameters.position[3] + 0.20
    end

    if data.expert ~= nil then
      buttonParameters.label = "Expert"
      buttonParameters.click_function = "expertClick"
      args.object.createButton(buttonParameters)
      buttonParameters.position[3] = buttonParameters.position[3] + 0.20
    end

    if data.standalone ~= nil then
      buttonParameters.label = "Standalone"
      buttonParameters.click_function = "standaloneClick"
      args.object.createButton(buttonParameters)
    end
  end
end

-- called for adding chaos tokens
---@param object object Usually "self"
---@param key string Name of the scenario
---@param mode string difficulty (e.g. "hard" or "expert")
function fillContainer(args)
  local data = getDataValue('modeData', args.key)
  if data == nil then return end

  local value = data[args.mode]
  if value == nil or value.token == nil then return end

  local tokenList = {}

  for _, tokenId in ipairs(value.token) do
    table.insert(tokenList, tokenId)
  end

  if value.append ~= nil then
    for _, tokenId in ipairs(value.append) do
      table.insert(tokenList, tokenId)
    end
  end

  -- randomly choose tokens for specific Carcosa scenarios in standalone
  if value.random then
    local n = #value.random
    if n > 0 then
      for _, tokenId in ipairs(value.random[math.random(1, n)]) do
        table.insert(tokenList, tokenId)
      end
    end
  end

  setChaosBagState(tokenList)

  if value.message then
    broadcastToAll(value.message)
  end

  if value.warning then
    broadcastToAll(value.warning, { 1, 0.5, 0.5 })
  end
end

function getDataValue(storage, key)
  local data = getObjectFromGUID(DATA_HELPER_GUID).getTable(storage)
  if data ~= nil then
    local value = data[key]
    if value ~= nil then
      local res = {}
      for m, v in pairs(value) do
        res[m] = v
        if res[m].parent ~= nil then
          local parentData = getDataValue(storage, res[m].parent)
          if parentData ~= nil and parentData[m] ~= nil and parentData[m].token ~= nil then
            res[m].token = parentData[m].token
          end
          res[m].parent = nil
        end
      end
      return res
    end
  end
end

-- respawns the chaos bag with a new state of tokens
---@param tokenList Table List of chaos token ids
function setChaosBagState(tokenList)
  if not canTouchChaosTokens() then return end

  local chaosbag = findChaosBag()
  local chaosbagData = chaosbag.getData()
  local reserveData = getObjectFromGUID("106418").getData()
  local tokenCache = {}
  local containedObjects = {}

  -- create a temporary copy of the data for each chaos token
  for _, objData in ipairs(reserveData.ContainedObjects) do
    tokenCache[objData.Nickname] = objData
  end

  -- iterate over tokenlist and insert specified tokens into new table
  for _, tokenId in ipairs(tokenList) do
    local tokenName = ID_URL_MAP[tokenId].name
    table.insert(containedObjects, tokenCache[tokenName])
  end

  -- overwrite chaos bag content and respawn it
  chaosbagData.ContainedObjects = containedObjects
  chaosbag.destruct()
  spawnObjectData({data = chaosbagData})

  -- remove tokens that are still in play
  for _, token in pairs(chaosTokens) do
    if token ~= nil then token.destruct() end
  end
  chaosTokens = {}
  chaosTokensLastMat = nil

  -- reset bless / curse manager
  blessCurseManagerApi.removeTakenTokensAndReset()

  printToAll("Chaos bag set to chosen difficulty.", "Green")
end

-- spawns the specified chaos token and puts it into the chaos bag
---@param id String ID of the chaos token
function spawnChaosToken(id)
  if not canTouchChaosTokens() then return end

  id = id:lower()
  local chaosbag = findChaosBag()
  local url = ID_URL_MAP[id].url or ""

  if url ~= "" then
    return spawnObject({
      type = 'Custom_Tile',
      position = { 0.49, 3, 0 },
      scale = { 0.81, 1.0, 0.81 },
      rotation = {0, 270, 0},
      callback_function = function(obj)
        obj.setName(ID_URL_MAP[id].name)
        chaosbag.putObject(obj)
        tokenArrangerApi.layout()
      end
    }).setCustomObject({
      type = 2,
      image = url,
      thickness = 0.1
    })
  end
end

-- removes the specified chaos token from the chaos bag
---@param id String ID of the chaos token
function removeChaosToken(id)
  if not canTouchChaosTokens() then return end

  local tokens = {}
  local chaosbag = findChaosBag()
  local name = ID_URL_MAP[id].name

  for _, v in ipairs(chaosbag.getObjects()) do
    if v.name == name then table.insert(tokens, v.guid) end
  end

  -- error handling: no matching token found
  if #tokens == 0 then
    printToAll("No " .. name .. " tokens in the chaos bag.", "Yellow")
    return
  end

  chaosbag.takeObject({
    guid = tokens[1],
    smooth = false,
    callback_function = function(obj)
      obj.destruct()
      tokenArrangerApi.layout()
    end
  })
  printToAll("Removing " .. name .. " token (in bag: " .. #tokens - 1 .. ")", "White")
end

-- empty the chaos bag
function emptyChaosBag()
  if not canTouchChaosTokens() then return end

  local chaosbag = findChaosBag()
  for _, object in ipairs(chaosbag.getObjects()) do
    chaosbag.takeObject({callback_function = function(item) item.destruct() end})
  end
end

---------------------------------------------------------
-- Content Importing and XML functions
---------------------------------------------------------

function onClick_refreshList()
  local request = WebRequest.get(SOURCE_REPO .. '/library.json', completed_list_update)
  requestObj = request
  startLuaCoroutine(Global, 'downloadCoroutine')
end

function onClick_select(player, params)
  params = JSON.decode(urldecode(params))
  local url = SOURCE_REPO .. '/' .. params.url
  local request = WebRequest.get(url, function (request) complete_obj_download(request, params) end )
  requestObj = request
  startLuaCoroutine(Global, 'downloadCoroutine')
end

function onClick_load()
  UI.show('progress_display')
  UI.hide('load_button')
end

function onClick_toggleUi(color, title)
  if title == "Navigation Overlay" then
    local navigationOverlayHandler = getObjectFromGUID("797ede")
    navigationOverlayHandler.call("cycleVisibility", color)
    return
  end

  UI.hide('optionPanel')
  UI.hide('load_ui')

  -- when same button is clicked or close window button is pressed, don't open UI
  if UI.getValue('title') ~= title and title ~= 'Hidden' then
    UI.setValue('title', title)

    if title == "Options" then
      UI.show('optionPanel')
    else
      update_window_content(title)
      UI.show('load_ui')
    end
  else
    UI.setValue('title', "Hidden")
  end
end

function downloadCoroutine()
  while requestObj do
    UI.setAttribute('download_progress', 'percentage', requestObj.download_progress * 100)
    coroutine.yield(0)
  end
  return 1
end

function update_list(objects)
  local ui = UI.getXmlTable()
  local update_height = find_tag_with_id(ui, 'ui_update_height')
  local update_children = find_tag_with_id(update_height.children, 'ui_update_point')

  update_children.children = {}

  for _, v in ipairs(objects) do
    local s = JSON.encode(v);
    table.insert(update_children.children,
      { tag = 'Text',
        value = v.name,
        attributes = { onClick = 'onClick_select(' .. urlencode(JSON.encode(v)) .. ')', alignment = 'MiddleLeft' }
      })
  end

  update_height.attributes.height = #(update_children.children) * 24
  UI.setXmlTable(ui)
end

function update_window_content(new_title)
  if not library then return end

  if new_title == 'Campaigns' then
    update_list(library.campaigns)
  elseif new_title == 'Standalone Scenarios' then
    update_list(library.scenarios)
  elseif new_title == 'Investigators' then
    update_list(library.investigators)
  elseif new_title == 'Community Content' then
    update_list(library.community)
  elseif new_title == 'Extras' then
    update_list(library.extras)
  else
    update_list({})
  end
end

function complete_obj_download(request, params)
  assert(request.is_done)
  if request.is_error or request.response_code ~= 200 then
    print('error: ' .. request.error)
  else
    if pcall(function()
      local replaced_object
      pcall(function()
        if params.replace then
          replaced_object = getObjectFromGUID(params.replace)
        end
      end)
      local json = request.text
      if replaced_object then
        local pos = replaced_object.getPosition()
        local rot = replaced_object.getRotation()
        destroyObject(replaced_object)
        Wait.frames(function()
          spawnObjectJSON({json = json, position = pos, rotation = rot})
        end, 1)
      else
        spawnObjectJSON({json = json})
      end
    end) then
      print('Object loaded.')
    else
      print('Error loading object.')
    end
  end

  requestObj = nil
  UI.setAttribute('download_progress', 'percentage', 100)
end

-- the download button on the placeholder objects calls this to directly initiate a download
-- params is a table with url and guid of replacement object, which happens to match what onClick_select wants
function placeholder_download(params)
  onClick_select(nil, JSON.encode(params))
end

function completed_list_update(request)
  assert(request.is_done)
  if request.is_error or request.response_code ~= 200 then
    print('error: ' .. request.error)
  else
    local json_response = nil
    if pcall(function () json_response = JSON.decode(request.text) end) then
      library = json_response
      update_window_content(UI.getValue('title'))
    else
      print('error parsing downloaded library')
    end
  end

  requestObj = nil
  UI.setAttribute('download_progress', 'percentage', 100)
end

function find_tag_with_id(ui, id)
  for _, obj in ipairs(ui) do
    if obj.attributes and obj.attributes.id and obj.attributes.id == id then return obj end
    if obj.children then
      local result = find_tag_with_id(obj.children, id)
      if result then return result end
    end
  end
  return nil
end

function urlencode(str)
  local str = string.gsub(str, "([^A-Za-z0-9-_.~])",
    function (c) return string.format("%%%02X", string.byte(c)) end)
  return str
end

function urldecode(str)
  local str = string.gsub(str, "%%(%x%x)",
    function (h) return string.char(tonumber(h, 16)) end)
  return str
end

---------------------------------------------------------
-- Option Panel related functionality
---------------------------------------------------------

-- called by toggling an option
function onClick_toggleOption(_, id)
  local state = self.UI.getAttribute(id, "isOn")

  -- flip state (and handle stupid "False" value)
  if state == "False" then
    state = true
  else
    state = false
  end

  self.UI.setAttribute(id, "isOn", state)
  applyOptionPanelChange(id, state)
end

-- sets the option panel to the correct state (corresponding to 'optionPanel')
function updateOptionPanelState()
  for id, enabled in pairs(optionPanel) do
    if (type(enabled) == "boolean" and enabled)
        or (type(enabled) == "string" and enabled)
        or (type(enabled) == "table" and #enabled ~= 0) then
      self.UI.setAttribute(id, "isOn", true)
    else
      self.UI.setAttribute(id, "isOn", "False")
    end
  end
end

-- handles the applying of option selections and calls the respective functions based
---@param id String ID of the option that was selected or deselected
---@param state Boolean State of the option (true = enabled)
function applyOptionPanelChange(id, state)
  -- option: Snap tags
  if id == "useSnapTags" then
    playmatApi.setLimitSnapsByType(state, "All")
    optionPanel[id] = state

  -- option: Draw 1 button
  elseif id == "showDrawButton" then
    playmatApi.showDrawButton(state, "All")
    optionPanel[id] = state

  -- option: Clickable clue counters
  elseif id == "useClueClickers" then
    playmatApi.clickableClues(state, "All")
    optionPanel[id] = state

    -- update master clue counter
    getObjectFromGUID("4a3aa4").setVar("useClickableCounters", state)

  -- option: Clickable resource counters
  elseif id == "useResourceCounters" then
    optionPanel[id] = state

  -- option: Play area snap tags
  elseif id == "playAreaSnapTags" then
    playAreaAPI.setLimitSnapsByType(state)
    optionPanel[id] = state

  -- option: Show Title on placing scenarios
  elseif id == "showTitleSplash" then
    optionPanel[id] = state

  -- option: Show token arranger
  elseif id == "showTokenArranger" then
    optionPanel[id] = spawnOrRemoveHelper(state, "Token Arranger", {-42.3, 1.6, -46.5})

  -- option: Show clean up helper
  elseif id == "showCleanUpHelper" then
    optionPanel[id] = spawnOrRemoveHelper(state, "Clean Up Helper", {-66, 1.6, 46})

  -- option: Show hand helper for each player
  elseif id == "showHandHelper" then
    for i, color in ipairs(MAT_COLORS) do
      local pos = playmatApi.transformLocalPosition({0.05, 0, -1.182}, color)
      local rot = playmatApi.returnRotation(color)
      optionPanel[id][i] = spawnOrRemoveHelper(state, "Hand Helper", pos, rot)
    end

  -- option: Show search assistant for each player
  elseif id == "showSearchAssistant" then
    for i, color in ipairs(MAT_COLORS) do
      local pos = playmatApi.transformLocalPosition({-0.3, 0, -1.182}, color)
      local rot = playmatApi.returnRotation(color)
      optionPanel[id][i] = spawnOrRemoveHelper(state, "Search Assistant", pos, rot)
    end

  -- option: Show chaos bag manager
  elseif id == "showChaosBagManager" then
    optionPanel[id] = spawnOrRemoveHelper(state, "Chaos Bag Manager", {-66, 1.6, -49.5})

  -- option: Show attachment helper
  elseif id == "showAttachmentHelper" then
    optionPanel[id] = spawnOrRemoveHelper(state, "Attachment Helper", {-62, 1.4, 0})

  -- option: Show CYOA campaign guides
  elseif id == "showCYOA" then
    optionPanel[id] = spawnOrRemoveHelper(state, "CYOA Campaign Guides", {65, 1.6, -11})

  -- option: Show custom playmat images
  elseif id == "showCustomPlaymatImages" then
    optionPanel[id] = spawnOrRemoveHelper(state, "Custom Playmat Images", {67.5, 1.6, 37})

  -- option: Show displacement tool
  elseif id == "showDisplacementTool" then
    optionPanel[id] = spawnOrRemoveHelper(state, "Displacement Tool", {-57, 1.6, 46})
  end
end

-- handler for spawn / remove functions of helper objects
---@param state Boolean Contains the state of the option: true = spawn it, false = remove it
---@param name String Name of the helper object
---@param position Vector Position of the object (where it will spawn)
---@param rotation Vector Rotation of the object for spawning (default: {0, 270, 0})
---@return. GUID of the spawnedObj (or nil if object was removed)
function spawnOrRemoveHelper(state, name, position, rotation)
  if state then
    Player.getPlayers()[1].pingTable(position)
    return spawnHelperObject(name, position, rotation).getGUID()
  else
    return removeHelperObject(name)
  end
end

-- copies the specified tool (by name) from the option panel source bag
---@param name String Name of the object that should be copied
---@param position Table Desired position of the object
function spawnHelperObject(name, position, rotation)
  local sourceBag = getObjectFromGUID("830bd0")

  -- error handling for missing sourceBag
  if not sourceBag then
    broadcastToAll("Option panel source bag could not be found!", "Red")
    return
  end

  local spawnTable = {position = position}

  -- only overrride rotation if there is one provided (object's rotation used instead)
  if rotation then
    spawnTable.rotation = rotation
  end

  for _, obj in ipairs(sourceBag.getData().ContainedObjects) do
    if obj["Nickname"] == name then
      spawnTable.data = obj
      spawnTable.callback_function = function(spawnedObj)
        Wait.time(function() spawnedObj.setLock(true) end, 2)
      end
      return spawnObjectData(spawnTable)
    end
  end
end

-- removes the specified tool (by name)
---@param name String Object that should be removed
function removeHelperObject(name)
  -- links objects name to the respective option name (to grab the GUID for removal)
  local referenceTable = {
    ["Token Arranger"]        = "showTokenArranger",
    ["Clean Up Helper"]       = "showCleanUpHelper",
    ["Hand Helper"]           = "showHandHelper",
    ["Search Assistant"]      = "showSearchAssistant",
    ["Chaos Bag Manager"]     = "showChaosBagManager",
    ["Displacement Tool"]     = "showDisplacementTool",
    ["Custom Playmat Images"] = "showCustomPlaymatImages",
    ["Attachment Helper"]     = "showAttachmentHelper",
    ["CYOA Campaign Guides"]  = "showCYOA"
  }

  local data = optionPanel[referenceTable[name]]

  -- if there is a GUID stored, remove that object
  if type(data) == "string" then
    local obj = getObjectFromGUID(data)
    if obj then obj.destruct() end

  -- if it is a table (e.g. for the "Hand Helper", remove all of them)
  elseif type(data) == "table" then
    for _, guid in pairs(data) do
      local obj = getObjectFromGUID(guid)
      if obj then obj.destruct() end
    end
  end
end

-- loads the default options
function onClick_defaultSettings()
  for id, _ in pairs(optionPanel) do
    local state = false
    -- override for settings that are enabled by default
    if id == "useSnapTags" or id == "showTitleSplash" then
      state = true
    end
    applyOptionPanelChange(id, state)
  end

  -- clean reset of variable
  optionPanel = {
    playAreaSnapTags = true,
    showAttachmentHelper = false,
    showCleanUpHelper = false,
    showChaosBagManager = false,
    showCustomPlaymatImages = false,
    showCYOA = false,
    showDisplacementTool = false,
    showDrawButton = false,
    showHandHelper = {},
    showSearchAssistant = {},
    showTitleSplash = true,
    showTokenArranger = false,
    useClueClickers = false,
    useSnapTags = true
  }

  -- update UI
  updateOptionPanelState()
end

-- splash scenario title on setup
function titleSplash(scenarioName)
  if optionPanel['showTitleSplash'] then

    -- if there's any ongoing title being displayed, hide it and cancel the waiting function
    if hideTitleSplashWaitFunctionId then
      Wait.stop(hideTitleSplashWaitFunctionId)
      hideTitleSplashWaitFunctionId = nil
      UI.setAttribute('title_splash', 'active', false)
    end

    -- display scenario name and set a 4 seconds (2 seconds animation and 2 seconds on screen)
    -- wait timer to hide the scenario name
    UI.setValue('title_splash_text', scenarioName)
    UI.show('title_splash')
    hideTitleSplashWaitFunctionId = Wait.time(function()
      UI.hide('title_splash')
      hideTitleSplashWaitFunctionId = nil
    end, 4)

    soundCubeApi.playSoundByName("Deep Bell")
  end
end

---------------------------------------------------------
-- Update notification related functionality
---------------------------------------------------------

-- grabs the latest mod version and release notes from GitHub (called onLoad())
function getModVersion()
  WebRequest.get(SOURCE_REPO .. '/modversion.json', compareVersion)
end

-- compares the modversion with GitHub and possibly shows the update notification
function compareVersion(request)
  if request.is_error then
    log(request.error)
    return
  end

  -- global variable to make it accessible for other functions
  modMeta = JSON.decode(request.text)

  -- stop here if on latest version
  if MOD_VERSION == modMeta["latestVersion"] then return end
  
  -- stop here if "don't show again" was clicked for this version before
  if acknowledgedUpgradeVersions[modMeta["latestVersion"]] then return end

  updateNotificationLoading()

  -- delay to avoid lagging during onLoad()
  Wait.time(function() UI.show("FinnIcon") end, 1)
end

-- updates the XML update notification based on the mod metadata
function updateNotificationLoading()
  -- grab data
  local highlights = modMeta["releaseHighlights"]

  -- concatenate the release highlights
  local highlightText = "• " .. highlights[1]
  for i, entry in pairs(highlights) do
    if i ~= 1 then
      highlightText = highlightText .. "\n• " .. entry
    end
  end
  
  -- update the XML UI
  UI.setValue("notificationHeader", "New version available: ".. modMeta["latestVersion"])
  UI.setValue("releaseHighlightText", highlightText)
  UI.setAttribute("highlightRow", "preferredHeight", 20*#highlights)
  UI.setAttribute("updateNotification", "height", 20*#highlights + 125)
end

-- triggered by clicking on the Finn Icon
function onClick_FinnIcon()
  if notificationVisible then
    UI.hide("updateNotification")
    notificationVisible = false
  else
    UI.show("updateNotification")
    notificationVisible = true
  end
end

-- close / don't show again buttons on the update notification
function onClick_notification(_, parameter)
  if parameter == "dontShowAgain" then
    -- this variable tracks if "don't show again" was pressed for a version
    acknowledgedUpgradeVersions[modMeta["latestVersion"]] = true
  end
  UI.hide("FinnIcon")
  UI.hide("updateNotification")
end