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

-- set true to enable debug logging
DEBUG = false

-- we use this to turn off collision handling until onLoad() is complete
COLLISION_ENABLED = false

-- used for recreating the link to a custom data helper after image change
customDataHelper = nil

local SHIFT_OFFSETS = {
  left  = { x = 0.00, y = 0, z = 7.67 },
  right = { x = 0.00, y = 0, z = -7.67 },
  up    = { x = 6.54, y = 0, z = 0.00 },
  down  = { x = -6.54, y = 0, z = 0.00 }
}
local SHIFT_EXCLUSION = {
  ["b7b45b"] = true,
  ["f182ee"] = true,
  ["721ba2"] = true
}

local tokenManager = require("core/token/TokenManager")
local INVESTIGATOR_COUNTER_GUID = "f182ee"
local PLAY_AREA_ZONE_GUID = "a2f932"
local lastCollisionObject
local currentScenario

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

function onSave()
  return JSON.encode({
    currentScenario = currentScenario
  })
end

function onLoad(saveState)
  -- records locations we have spawned clues for
  local saveData = JSON.decode(saveState) or {}
  currentScenario = saveData.currentScenario

  self.interactable = DEBUG
  Wait.time(function() COLLISION_ENABLED = true end, 1)
end

function log(message)
  if DEBUG then print(message) end
end

-- Called by Custom Data Helpers to push their location data into the Data Helper.  This adds the
-- data to the local token manager instance.
---@param args Table Single-value array holding the GUID of the Custom Data Helper making the call
function updateLocations(args)
  customDataHelper = getObjectFromGUID(args[1])
  if customDataHelper ~= nil then
    tokenManager.addLocationData(customDataHelper.getTable("LOCATIONS_DATA"))
  end
end

function onCollisionEnter(collision_info)
  local obj = collision_info.collision_object

  -- only trigger the following once every 0.1s for each object
  -- (otherwise TTS fires this event 20 times and that causes 20 JSON decodes)
  if not COLLISION_ENABLED or lastCollisionObject == obj then return end
  lastCollisionObject = obj
  Wait.time(function() lastCollisionObject = nil end, 0.1)

  -- check if we should spawn clues here and do so according to playercount
  if shouldSpawnTokens(obj) then
    tokenManager.spawnForCard(obj)
  end
end

function shouldSpawnTokens(card)
  local metadata = JSON.decode(card.getGMNotes())
  if metadata == nil then
    return tokenManager.hasLocationData(card)
  end
  return metadata.type == "Location"
      or metadata.type == "Enemy"
      or metadata.type == "Treachery"
      or metadata.weakness
end

-- Move all contents on the play area (cards, tokens, etc) one slot in the given direction.  Certain
-- fixed objects will be ignored, as will anything the player has tagged with 'displacement_excluded'
---@param playerColor String Color of the player requesting the shift.  Used solely to send an error
---    message in the unlikely case that the scripting zone has been deleted
function shiftContentsUp(playerColor)
  shiftContents(playerColor, "up")
end

function shiftContentsDown(playerColor)
  shiftContents(playerColor, "down")
end

function shiftContentsLeft(playerColor)
  shiftContents(playerColor, "left")
end

function shiftContentsRight(playerColor)
  shiftContents(playerColor, "right")
end

function shiftContents(playerColor, direction)
  local zone = getObjectFromGUID(PLAY_AREA_ZONE_GUID)
  if not zone then
    broadcastToColor("Scripting zone couldn't be found.", playerColor, "Red")
    return
  end

  for _, object in ipairs(zone.getObjects()) do
    if not (SHIFT_EXCLUSION[object.getGUID()] or object.hasTag("displacement_excluded")) then
      object.translate(SHIFT_OFFSETS[direction])
    end
  end
end

-- Returns the current value of the investigator counter from the playmat
---@return Integer.  Number of investigators currently set on the counter
function getInvestigatorCount()
  local investigatorCounter = getObjectFromGUID("f182ee")
  return investigatorCounter.getVar("val")
end

-- Reset the play area's tracking of which cards have had tokens spawned.
function resetSpawnedCards()
  spawnedLocationGUIDs = {}
end

function onScenarioChanged(scenarioName)
  currentScenario = scenarioName
end