-- Collision groups:
-- 0x1 - walls
-- 0x2 - player
-- 0x4 - player bullets
-- 0x8 - enemies
-- 0x10 - enemy bullets
import "CoreLibs/object"
import "CoreLibs/graphics"
import "CoreLibs/sprites"
import "CoreLibs/timer"
import "kani"

local gfx <const> = playdate.graphics

local player = nil
local ui = nil

function setup()
   ui = UI()
   player = Kani(ui)
   player:moveTo(16, 120)
   player:addInputHandlers()
   player:add()
   ui:add()

   makeWalls()
   
   drawBackground()
end

function makeWalls()
   makeWall(200, 0, 400, 1)
   makeWall(0, 120, 1, 240)
   makeWall(200, 240, 400, 1)
   makeWall(400, 120, 1, 240)
end

function makeWall(x, y, w, h)
   local wall = gfx.sprite.new()
   wall:setSize(w, h)
   wall:setCollideRect(0, 0, wall:getSize())
   wall:moveTo(x, y)
   wall:setGroupMask(0x1)
   wall:add()
end

function drawBackground()
   local backgroundImage = gfx.image.new(400, 240, gfx.kColorWhite)
   gfx.sprite.setBackgroundDrawingCallback(
      function(x, y, width, height)
         backgroundImage:draw(0, 0)
      end
   )
end

function playdate.update()
   gfx.sprite.update()
   playdate.timer.updateTimers()
end

setup()