-- A squid-like enemy unit
import "CoreLibs/object"
import "CoreLibs/graphics"
import "CoreLibs/sprites"
import "CoreLibs/timer"
import "entity"

local gfx <const> = playdate.graphics
local geom <const> = playdate.geometry

class("Ika").extends(Entity)

function Ika:init(target)
   Ika.super.init(self, gfx.image.new("images/ika.png"), 25, 1)
   self.target = target
   self:setCollidesWithGroupsMask(0x2)
   self.type = 'ika'
end

function Ika:onReady()
   self.weaponTimer = playdate.timer.new(7000,
      function()
         local b = Bullet(10, 20, self:calculateVector(self.target))
         b:moveTo(self.x - (self.width/2) - 1, self.y)
         b:add()
      end
   )
   self.weaponTimer.repeats = true
end

function Ika:calculateVector(target)
   local vec = geom.point.new(target:getPosition()) -
      geom.point.new(self:getPosition())
   return vec:normalized() * 5
end

function Ika:remove()
   Ika.super.remove(self)
   if self.weaponTimer then self.weaponTimer:remove() end
end