local debugGraph = require 'vendor.debugGraph'
local inspect = require 'vendor.inspect'
local push = require 'vendor.push'
local lurker = require 'vendor.lurker'

local config = require('config')

environment = os.getenv('ENV')

local gameWidth, gameHeight = 1280, 720
local windowWidth, windowHeight = love.window.getDesktopDimensions()
windowWidth, windowHeight = windowWidth*.5, windowHeight*.5 --make the window a bit smaller than the screen itself

if environment == 'DEV' then
  push:setupScreen(gameWidth, gameHeight, windowWidth, windowHeight, {fullscreen = false, resizable = true})
else
  push:setupScreen(gameWidth, gameHeight, gameWidth, gameHeight, {fullscreen = true})
end

function love.resize(w, h)
  push:resize(w, h)
  secondaryCanvas = love.graphics.newCanvas(push:getWidth(), push:getHeight())
end

function love.load()
  state = {
    currentScreen = 1,
    transitioning = false,
    stateCounter = 0,
  }

  love.mouse.setVisible( false )

  secondaryCanvas = love.graphics.newCanvas(push:getWidth(), push:getHeight())

  fpsGraph = debugGraph:new('fps', 0, 0)
  memGraph = debugGraph:new('mem', 0, 30)

  for key, node in ipairs(config.screens) do
    node.load()
  end

  lurker.quiet = true
end

function lurker.preswap(f)
  if f:match('_thread.lua') then
    print("Preventing _thread update!")
    return false
  end
end

function getw() return push:getWidth() end
function geth() return push:getHeight() end

function love.draw()
  push:start()

  -- Patch love.graphics.getWidth/Height to account for push
  oldw, oldh = love.graphics.getWidth, love.graphics.getHeight
  love.graphics.getWidth, love.graphics.getHeight = getw, geth

  config.screens[state.currentScreen].render()

  if state.transitioning then
    -- Render next screen into canvas and fade accordingly
    secondaryCanvas:renderTo(config.screens[state.currentScreen % #config.screens + 1].render)
    love.graphics.setColor(255, 255, 255, 255 * (state.stateCounter / config.transitionTime)) -- red, green, blue, opacity (this would be white with 20% opacity)
    love.graphics.draw(secondaryCanvas, 0, 0)
  end

  -- Draw graphs
  love.graphics.setColor(255, 255, 255, 128)

  -- love.graphics.setNewFont(10)
  -- love.graphics.print(inspect(state), 0, 60, 0)

  fpsGraph:draw()
  memGraph:draw()

  love.graphics.getWidth, love.graphics.getHeight = oldw, oldh
  push:finish()
end

function love.update(dt)
  config.screens[state.currentScreen].update(dt)

  if state.transitioning then
    config.screens[state.currentScreen % #config.screens + 1].update(dt)
  end

  state.stateCounter = state.stateCounter + dt

  if state.transitioning then
    if state.stateCounter >= config.transitionTime then
      state.stateCounter = 0
      state.transitioning = false
      state.currentScreen = (state.currentScreen % #config.screens) + 1
    end
  else
    if state.stateCounter >= config.cycleTime then
      state.stateCounter = 0
      state.transitioning = true
    end
  end

  -- Update the graphs
  fpsGraph:update(dt)
  memGraph:update(dt)

  lurker.update()
end