-- set true to enable debug logging
DEBUG = false
-- we use this to turn off collision handling (for clue spawning)
-- until after load is complete (probably a better way to do this)
COLLISION_ENABLED = false
-- position offsets, adjust these to reposition things relative to mat [x,y,z]
DRAWN_ENCOUNTER_CARD_OFFSET = {0.98, 0.5, -0.635}
DRAWN_CHAOS_TOKEN_OFFSET = {-1.2, 0.5, -0.45}
DISCARD_BUTTON_OFFSETS = {
  {-0.98, 0.2, -0.935},
  {-0.525, 0.2, -0.935},
  {-0.07, 0.2, -0.935},
  {0.39, 0.2, -0.935},
  {0.84, 0.2, -0.935},
}

-- the position of the global discard pile
-- TODO: delegate to global for any auto discard actions
DISCARD_POSITION = {-3.85, 3, 10.38}

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

-- builds a function that discards things in searchPostion to discardPostition
function makeDiscardHandlerFor(searchPosition, discardPosition)
  return function (_)
    local discardItemList = findObjectsAtPosition(searchPosition)
    for _, obj in ipairs(discardItemList) do
      obj.setPositionSmooth(discardPosition, false, true)
      obj.setRotation({0, -90, 0})
    end
  end
end

-- build a discard button at position to discard from searchPosition to discardPosition
-- number must be unique
function makeDiscardButton(position, searchPosition, discardPosition, number)
  local handler = makeDiscardHandlerFor(searchPosition, discardPosition)
  local handlerName = 'handler' .. number
  self.setVar(handlerName, handler)
  self.createButton({
    label = "Discard",
    click_function= handlerName,
    function_owner= self,
    position = position,
    scale = {0.12, 0.12, 0.12},
    width = 800,
    height = 280,
    font_size = 180,
  })
end

function onload()
  self.interactable = DEBUG
  DATA_HELPER = getObjectFromGUID('708279')
  PLAYER_CARDS = DATA_HELPER.getTable('PLAYER_CARD_DATA')
  PLAYER_CARD_TOKEN_OFFSETS = DATA_HELPER.getTable('PLAYER_CARD_TOKEN_OFFSETS')

  -- positions of encounter card slots
  local encounterSlots = {
    {1, 0, -0.7},
    {0.55, 0, -0.7},
    {0.1, 0, -0.7},
    {-0.35, 0, -0.7},
    {-0.8, 0, -0.7}
  }

  local i = 1
  while i <= 5 do
    makeDiscardButton(DISCARD_BUTTON_OFFSETS[i], encounterSlots[i], DISCARD_POSITION, i)
    i = i + 1
  end

  self.createButton({
    label = " ",
    click_function = "drawEncountercard",
    function_owner = self,
    position = {-1.45,0,-0.7},
    rotation = {0,-15,0},
    width = 170,
    height = 255,
    font_size = 50
  })

  self.createButton({
    label=" ",
    click_function = "drawChaostokenButton",
    function_owner = self,
    position = {1.48,0.0,-0.74},
    rotation = {0,-45,0},
    width = 125,
    height = 125,
    font_size = 50
  })

  COLLISION_ENABLED = true
end

function findObjectsAtPosition(localPos)
    local globalPos = self.positionToWorld(localPos)
    local objList = Physics.cast({
        origin=globalPos, --Where the cast takes place
        direction={0,1,0}, --Which direction it moves (up is shown)
        type=2, --Type. 2 is "sphere"
        size={2,2,2}, --How large that sphere is
        max_distance=1, --How far it moves. Just a little bit
        debug=false --If it displays the sphere when casting.
    })
    local decksAndCards = {}
        for _, obj in ipairs(objList) do
        if obj.hit_object.tag == "Deck" or obj.hit_object.tag == "Card" then
            table.insert(decksAndCards, obj.hit_object)
        end
    end
    return decksAndCards
end

function spawnTokenOn(object, offsets, tokenType)
  local tokenPosition = object.positionToWorld(offsets)
  spawnToken(tokenPosition, tokenType)
end

-- spawn a group of tokens of the given type on the object
function spawnTokenGroup(object, tokenType, tokenCount)
  local offsets = PLAYER_CARD_TOKEN_OFFSETS[tokenCount]
  if offsets == nil then
    error("couldn't find offsets for " .. tokenCount .. ' tokens')
  end
  local i = 0
  while i < tokenCount do
    local offset = offsets[i + 1]
    spawnTokenOn(object, offset, tokenType)
    i = i + 1
  end
end

function buildPlayerCardKey(object)
  return object.getName() .. ':' .. object.getDescription()
end

function getPlayerCardData(object)
  return PLAYER_CARDS[buildPlayerCardKey(object)] or PLAYER_CARDS[object.getName()]
end

function shouldSpawnTokens(object)
  -- we assume we shouldn't spawn tokens if in doubt, this should
  -- only ever happen on load and in that case prevents respawns
  local spawned = DATA_HELPER.call('getSpawnedPlayerCardGuid', {object.getGUID()})
  local canSpawn = getPlayerCardData(object)
  return not spawned and canSpawn
end

function markSpawned(object)
  local saved = DATA_HELPER.call('setSpawnedPlayerCardGuid', {object.getGUID(), true})
  if not saved then
    error('attempt to mark player card spawned before data loaded')
  end
end

function spawnTokensFor(object)
  local data = getPlayerCardData(object)
  if data == nil then
    error('attempt to spawn tokens for ' .. object.getName() .. ': no token data')
  end
  log(object.getName() .. '[' .. object.getDescription() .. ']' .. ' : ' .. data['tokenType'] .. ' : ' .. data['tokenCount'])
  spawnTokenGroup(object, data['tokenType'], data['tokenCount'])
  markSpawned(object)
end

function onCollisionEnter(collision_info)
  if not COLLISION_ENABLED then
    return
  end

  local object = collision_info.collision_object
  -- anything to the left of this is legal to spawn
  local discardSpawnBoundary = self.positionToWorld({-1.2, 0, 0})
  local boundaryLocalToCard = object.positionToLocal(discardSpawnBoundary)
  if boundaryLocalToCard.x > 0 then
    log('not checking for token spawn, boundary relative is ' .. boundaryLocalToCard.x)
    return
  end
  if not object.is_face_down and shouldSpawnTokens(object) then
    spawnTokensFor(object)
  end
end

-- functions delegated to Global
function drawChaostokenButton(object, player, isRightClick)
  -- local toPosition = self.positionToWorld(DRAWN_CHAOS_TOKEN_OFFSET)
  Global.call("drawChaostoken", {self, DRAWN_CHAOS_TOKEN_OFFSET, isRightClick})
end

function drawEncountercard(object, player, isRightClick)
local toPosition = self.positionToWorld(DRAWN_ENCOUNTER_CARD_OFFSET)
Global.call("drawEncountercard", {toPosition, self.getRotation(), isRightClick})
end

function spawnToken(position, tokenType)
  Global.call('spawnToken', {position, tokenType})
end