---@alias InputState { upJustPressed: boolean, downJustPressed: boolean, rightJustPressed: boolean, leftJustPressed: boolean, aJustPressed: boolean, bJustPressed: boolean }

local buttonJustPressed = playdate.buttonJustPressed
local inputState = {}

inputSystem = filteredSystem("input", { canReceiveInput = T.marker }, function(e, _, system)
    e.inputState = inputState
    system.world:addEntity(e)
end)

function inputSystem:preProcess()
    inputState.upJustPressed = buttonJustPressed(playdate.kButtonUp)
    inputState.downJustPressed = buttonJustPressed(playdate.kButtonDown)
    inputState.rightJustPressed = buttonJustPressed(playdate.kButtonRight)
    inputState.leftJustPressed = buttonJustPressed(playdate.kButtonLeft)
    inputState.aJustPressed = buttonJustPressed(playdate.kButtonA)
    inputState.bJustPressed = buttonJustPressed(playdate.kButtonB)
end