function love.load()
  fps = 30
  upTime = love.timer.getTime()
  nextTime = upTime

  windowProfile = {
    mode = {
      width  = 256,
      height = 240,
    },
    scale = {
      x = 2,
      y = 2,
    },
    title = "GNU & Bola Brawlers",
  }

  love.graphics.setBackgroundColor(0, 232, 216)
  love.graphics.setDefaultFilter('nearest', 'nearest')

  love.window.setMode(windowProfile.mode.width * windowProfile.scale.x, windowProfile.mode.height * windowProfile.scale.y)
  love.window.setTitle(windowProfile.title)

  button = {
    left   = 'a',
    right  = 'd',
    up     = 'w',
    down   = 's',
    a      = 'j',
    b      = 'k',
    select = 'g',
    start  = 'h',
    quit   = 'escape',
  }

  metaSprites = {
    bola = {
      image = love.graphics.newImage('multimedia/ppu_rp2c0x/meta_sprites/bola/default_sheet_color0_alpha.png'),
      x = 24,
      y = 32,
    }
  }

  character = {
    bola = {
      orientation  = 0,
      acceleration = 0,
      velocity     = 125,
      gravity      = -500,
      position     = {
        x = windowProfile.mode.width  / 2,
        y = windowProfile.mode.height / 2,
      },
      scale        = {
        x = 1,
        y = 1,
      },
      origin       = {
        x = metaSprites.bola.x / 2,
        y = metaSprites.bola.y / 2,
      },
      stand        = require 'stand',
      walk         = require 'walk',
      jump         = require 'jump',
      actionLeft   = false,
      actionRight  = false,
      actionUp     = false,
      actionDown   = false,
      actionA      = false,
      actionB      = false,
    },
  }
  sprite = {
    bola = require 'stand',
  }
end

function love.keypressed(key, scancode)
  keypressed = function(character, metaSprites, sprite, key, scancode)
    if scancode == button.quit then
      love.event.quit()
    end

    if scancode == button.a  then
      character.actionA = true
      character.actionDown = false
      character.actionUp = false
      sprite = require 'jump'
    end

    if scancode == button.left then
      character.actionLeft = true
    end

    if scancode == button.right then
      character.actionRight = true
    end

    if scancode == button.up and character.jump.isJumping == false then
      character.actionUp = true
    end

    if scancode == button.down and character.jump.isJumping == false then
      character.actionDown = true
    end
  end
  keypressed(character.bola, metaSprites.bola, sprite.bola, key, scancode)
end

function love.keyreleased(key, scancode)
  keyreleased = function(character, key, scancode)
    if scancode == button.a then
      character.actionA     = false
    end

    if scancode == button.left then
      character.actionLeft  = false
    end

    if scancode == button.right then
      character.actionRight = false
    end

    if scancode == button.up then
      character.actionUp    = false
    end

    if scancode == button.down then
      character.actionDown  = false
    end

    if scancode == button.b then
      character.actionB     = false
    end

    if scancode == button.a then
      character.actionA = false

      if character.jump.velocity ~= 0 then
        character.jump.limitButtonJump = true
      end
    end
  end
  keyreleased(character.bola, key, scancode)
end

function love.update(dt)
  nextTime = nextTime + (1 / fps)

  animation = function(sprite, metaSprites, dt)
    --Increase actual elapsed time with new dt
    sprite.elapsedTime = sprite.elapsedTime + dt --AnimationStart

    --In order to know if it is necessary to change the frame
    if sprite.elapsedTime >= (1 / sprite.fps) then
      sprite.elapsedTime = sprite.elapsedTime - (1 / sprite.fps)
      if sprite.currentFrame == # sprite then --If current frame is equal to long sprite list
        sprite.currentFrame = 1 -- Return to first frame
      else
        sprite.currentFrame = sprite.currentFrame + 1 --Next frame
      end
    end

    metaSprites.quad = sprite[sprite.currentFrame] --Update with new fame
  end
  animation(sprite.bola, metaSprites.bola, dt)

  motion = function(character, metaSprites, sprite, dt)
    if character.jump.higher > 0 and character.actionA == true then
      if character.jump.limitButtonJump == false then
        character.jump.higher   = character.jump.higher - dt
        character.jump.velocity = character.jump.velocity + character.jump.height * (dt / character.jump.higherMax)
      end
    end

    if character.actionLeft == true and character.actionRight == false then
      sprite = require 'walk'
      character.position.x = character.position.x - (character.velocity * dt)
      character.scale.x = -1
    end

    if character.actionRight == true and character.actionLeft == false then
      sprite = require 'walk'
      character.position.x = character.position.x + (character.velocity * dt)
      character.scale.x =  1
    end

    if character.actionUp == true and character.actionDown == false then
      sprite = require 'walk'
      character.position.y = character.position.y - (character.velocity * dt)
      character.jump.ground = character.position.y
    end

    if character.actionDown == true and character.actionUp == false then
      sprite = require 'walk'
      character.position.y = character.position.y + (character.velocity * dt)
      character.jump.ground = character.position.y
    end

    if character.actionUp == true and character.actionDown == true then
      sprite = require 'stand'
    elseif character.actionLeft == true and character.actionRight == true then
      sprite = require 'stand'
    elseif character.actionLeft == false and character.actionRight == false and character.actionUp == false and character.actionDown == false then
      sprite = require 'stand'
    end

    return sprite
  end
  sprite.bola = motion(character.bola, metaSprites.bola, sprite.bola, dt)

  gravity = function(character, dt)
    if character.jump.velocity ~= 0 then
      character.jump.isJumping = true
      character.position.y = character.position.y + (character.jump.velocity * dt)
      character.jump.velocity = character.jump.velocity - (character.gravity * dt)
    end

    if character.position.y > character.jump.ground then
      character.jump.velocity = 0
      character.position.y = character.jump.ground
      character.jump.higher = character.jump.higherMax

      character.jump.limitButtonJump = false
      character.jump.isJumping = false
      character.actionA = false

      if love.keyboard.isScancodeDown(button.up) then
        character.actionUp = true
      elseif love.keyboard.isScancodeDown(button.down) then
        character.actionDown = true
      end
    end
  end
  gravity(character.bola, dt)

  limit = function(character, dt)
    if character.position.x <= character.origin.x then
      character.position.x = character.origin.x
    elseif character.position.x >= windowProfile.mode.width - character.origin.x then
      character.position.x = windowProfile.mode.width - character.origin.x
    end

    if character.position.y <= character.origin.y then
      character.position.y = character.origin.y
    elseif character.position.y >= windowProfile.mode.height - character.origin.y then
      character.position.y = windowProfile.mode.height - character.origin.y
    end
  end
  limit(character.bola, dt)
end

function love.draw()
  local currentTime = love.timer.getTime()
  if nextTime <= currentTime then
    nextTime = currentTime
    return
  end
  love.timer.sleep(nextTime - currentTime)

  love.graphics.scale(windowProfile.scale.x, windowProfile.scale.y)

  love.graphics.print('FPS: ' .. love.timer.getFPS(), 0, 0)

  draw = function(metaSprites, character)
    love.graphics.draw(
      metaSprites.image,
      metaSprites.quad,
      character.position.x,
      character.position.y,
      character.orientation,
      character.scale.x,
      character.scale.y,
      character.origin.x,
      character.origin.y
    )
  end
  draw(metaSprites.bola, character.bola)
end