local Cursor = Object:extend()

local EmptyGrid = {
  {00,00,00,00,00,00,00,00,00,00,00,00},
  {00,00,00,00,00,00,00,00,00,00,00,00},
  {00,00,00,00,00,00,00,00,00,00,00,00},
  {00,00,00,00,00,00,00,00,00,00,00,00},
  {00,00,00,00,00,00,00,00,00,00,00,00},
  {00,00,00,00,00,00,00,00,00,00,00,00},
  {00,00,00,00,00,00,00,00,00,00,00,00}
}

function Cursor:new(controller)
  self.controller = controller

  self.x = 1
  self.y = 1
  self.isActive = false
  self.frame = 1
  self.tx = 1
  self.ty = 1

  self.grid = EmptyGrid

  self:loadRessources()
end

function Cursor:loadRessources()

  self.texture  = love.graphics.newImage("assets/gui/cursor.png")
  self.texture2 = love.graphics.newImage("assets/gui/cursor2.png")

  local w, h = self.texture:getDimensions()
  self.sprite     = {}
  self.sprite[1]  = love.graphics.newQuad(0, 0, 28, 11, w, h)
  self.sprite[2]  = love.graphics.newQuad(28, 0, 28, 11, w, h)
  self.sprite[3]  = love.graphics.newQuad(56, 0, 28, 11, w, h)
  self.sprite[4]  = love.graphics.newQuad(28, 0, 28, 11, w, h)
end

function Cursor:set(x, y)
  self.x = math.max(math.min(x, 12), 1)
  self.y = math.max(math.min(y, 07), 1)
  self.tx = self.x
  self.ty = self.y

  self.isActive = true
end

function Cursor:setGrid(type, x, y, value, whitelistedEntity)
  self.grid = {
    {00,00,00,00,00,00,00,00,00,00,00,00},
    {00,00,00,00,00,00,00,00,00,00,00,00},
    {00,00,00,00,00,00,00,00,00,00,00,00},
    {00,00,00,00,00,00,00,00,00,00,00,00},
    {00,00,00,00,00,00,00,00,00,00,00,00},
    {00,00,00,00,00,00,00,00,00,00,00,00},
    {00,00,00,00,00,00,00,00,00,00,00,00}
  }
  if type == "square" then
    local x = x - value
    local y = y - value
    local value = (value * 2) + 1

    for i=1, value do
      for j=1, value do
        local dx, dy
        dx = x + i - 1
        dy = y + j - 1
        if (dy >= 1) and (dy <= 7) and (dx >= 1) and (dx <= 12) then
          if  ((self.controller.battlearena:getObjectInCase(dx, dy) == nil) or
              (self.controller.battlearena:getObjectInCase(dx, dy) == whitelistedEntity) and (whitelistedEntity ~= nil)) and
              (self.controller.battlearena:getTerrain(dx, dy) ~= 3) then
            self.grid[dy][dx] = 1
          end
        end
      end
    end
  end
end

function Cursor:gridIsActive(x, y)
  if self.grid[y] ~= nil then
    return (self.grid[y][x] == 1)
  else
    return false
  end
end

function Cursor:resetGrid()
  self.grid = EmptyGrid
end

function Cursor:unset()
  self.isActive = false
end

function Cursor:update(dt)
 if (self.isActive) then
   self.frame = self.frame + dt*4
   if (self.frame >= 4) then
     self.frame = 1
   end
   local keys = self.controller.sources[1].keys

   if (keys["up"].isPressed) then
     dy     = math.max(self.y - 1, 1)
     if (self.grid[dy][self.x] == 1) then
       self.y = dy
     end
   end
   if (keys["down"].isPressed) then
     dy     = math.min(self.y + 1, 7)
     if (self.grid[dy][self.x] == 1) then
       self.y = dy
     end
   end
   if (keys["left"].isPressed) then
     dx     = math.max(self.x - 1, 1)
     if (self.grid[self.y][dx] == 1) then
       self.x = dx
     end
   end
   if (keys["right"].isPressed) then
     dx     = math.min(self.x + 1, 12)
     if (self.grid[self.y][dx] == 1) then
       self.x = dx
     end
   end

   if (keys["A"].isPressed) then
     self.controller.actormanager:sendSignalToCurrentEntity()
   end

   self.tx = (self.tx) + ((self.x) - (self.tx)) * dt*30
   self.ty = (self.ty) + ((self.y) - (self.ty)) * dt*30
   -- test
   --game
 end
end

function Cursor:drawBottom()

  if (self.isActive) then
    local x, y, frame
    x, y = self.controller.battlearena:gridToPixel(self.tx, self.ty, true)
    frame = math.floor(self.frame)

    love.graphics.draw(self.texture, self.sprite[frame], x, y, 0, 1, 1, 14, 6)
  end

end

function Cursor:drawTop()

  if (self.isActive) then
    local x, y
    x, y = self.controller.battlearena:gridToPixel(self.tx, self.ty, true)

    love.graphics.draw(self.texture2, x, y - 24, 0, 1, 1, 7, 26)
  end

end

return Cursor