local default_G = {}
for k, v in pairs(_G) do
  table.insert(default_G, k)
end

ease = require 'ease'

dropdown = require 'dropdown'
graph = require 'graph'

require 'util' -- exports into global table

-- rendering constants

padding = 14
outerpadding = 22
margin = 6
dropdownWidth = 106

-- slider

mixpoint = 0.5
oldmixpoint = 0.5
local mixpointtimer = 0 -- easter egg thing
local mixpointspin = 0

-- rendering

function love.load()
  dropdown.createDropdowns()
end

function love.update(dt)
  graph.update(dt)

  -- slider
  mixpointtimer = mix(mixpointtimer + math.abs(mixpoint - oldmixpoint), 0, math.min(dt * 8))
  oldmixpoint = mix(oldmixpoint, mixpoint, math.min(dt * 20, 1))

  if mixpointtimer > 2 then
    mixpointtimer = mixpointtimer - 2
    mixpointspin = mixpointspin + 4
  end

  mixpointspin = mix(mixpointspin, 0, dt * 3)

  dropdown.update(dt)
end

function love.draw()
  mode = dropdown.kget('mode').selected
  local sw, sh = love.graphics.getDimensions()
  local mx, my = love.mouse.getPosition()

  love.graphics.setColor(0.09, 0.09, 0.12, 1)
  love.graphics.rectangle('fill', 0, 0, sw, sh)
  love.graphics.setColor(0.08, 0.08, 0.1, 1)
  love.graphics.rectangle('line', 0, 0, sw, sh)

  love.graphics.setColor(1, 1, 1, 1)
  love.graphics.print('Box of Eases by oatmealine', outerpadding, sh - love.graphics.getFont():getHeight() - outerpadding)

  -- sliders
  -- yeah we do a lil' hardcoding

  if mode == 2 then
    local x, y, w, h = outerpadding, outerpadding * 2 + love.graphics.getFont():getHeight() + margin, dropdownWidth, 32

    love.graphics.setColor(0.7, 0.7, 0.7, 0.4)
    love.graphics.line(x, y + h/2, x + w, y + h/2)

    local sx, sy = x + w * oldmixpoint, y + h/2
    local ssize = h * 0.5

    love.graphics.push()

    love.graphics.translate(sx, sy)
    love.graphics.rotate((mixpoint - oldmixpoint) * 4 + mixpointspin * math.pi * 2)

    local hovering = mx > sx - ssize/2 and mx < sx + ssize/2 and my > sy - ssize/2 and my < sy + ssize/2 and dropdown.openDropdown == 0
    local dragging = mx > x and mx < x + w and my > y and my < y + h and love.mouse.isDown(1) and dropdown.openDropdown == 0

    love.graphics.setColor(0, 0, 0, 1)
    if hovering or dragging then
      love.graphics.setColor(0.2, 0.2, 0.3, 1)
    end
    love.graphics.rectangle('fill', -ssize/2, -ssize/2, ssize, ssize)
    love.graphics.setColor(1, 1, 1, 1)
    love.graphics.rectangle('line', -ssize/2, -ssize/2, ssize, ssize)

    love.graphics.rotate((mixpoint - oldmixpoint) * -2)

    love.graphics.setColor(1, 1, 1, 1)
    love.graphics.printf(math.floor(mixpoint * 100)/100, -ssize * 6, ssize - 2, ssize * 12, 'center')

    love.graphics.pop()

    if dragging then
      mixpoint = (mx - x) / w
      graph.touchtimer = 1
      dropdown.createDropdowns()
    end
  end

  -- dropdowns
  dropdown.render()

  -- graph
  graph.render()
end

function love.mousepressed(x, y, m)
  if dropdown.mousepressed(x, y, m) then return end
end

function love.mousereleased(x, y, m)
  if dropdown.mousereleased(x, y, m) then return end
end

function love.wheelmoved(x, y)
  if y == 0 then return end

  if dropdown.wheelmoved(x, y) then return end
end

function love.keypressed(key)
  if key == 'f6' then -- print all globals
    for k, v in pairs(_G) do
      for _, g in ipairs(default_G) do
        if g == k then goto continue end
      end
      print(k, v)
      ::continue::
    end
  end
end