------------------------------------------------------------------------------
-- Imports
------------------------------------------------------------------------------

local love        = require 'love'
local make_class  = require 'src.utils.classes'
local GameState   = require 'src.gstates.gstate'
local Fader       = require 'src.graphics.fader'
local Sprite      = require 'src.graphics.sprite'
local Cursor      = require 'src.ui.cursor'
local SoundEffect = require 'src.sound.sfx'


------------------------------------------------------------------------------
-- Class definitions
------------------------------------------------------------------------------

local MainMenu = make_class(GameState)


------------------------------------------------------------------------------
-- Class methods
------------------------------------------------------------------------------

function MainMenu:_init(name, index)
    GameState._init(self, name, index)
    self.skip  = false
    self.fade  = Fader()

    -- Create sprites and buttons.
    self.background = Sprite('imgs/cpu.png')

    -- Create a mouse cursor object at the current mouse position.
    local mx, my = love.mouse.getPosition()
    self.cursor = Cursor(mx, my)

    -- Create sound effects.
    self.bgm = SoundEffect('bgm/eskisky.wav')
end


function MainMenu:load()
    -- Load sprites.
    self.background:load()
    self.cursor:load()

    -- Load sound effects and start playing the background music
    self.bgm:load()
    self.bgm:play()
end


function MainMenu:update(dt)
    -- Update the fader.
    self.fade:update(dt)

    -- Move on to the next game state if the user skipped the intro or all stages are complete.
    if not self.skip then return self.index else return -1 end
end


function MainMenu:draw()
    self.background:draw()
    self.cursor:draw()
    self.fade:draw()
end


function MainMenu:unload()
    self.background:unload()
    self.cursor:unload()
    self.bgm:unload()
end


function MainMenu:keypressed(key)
    -- Skip the intro on any key press.
    if key == "escape" then
        self.skip = true
    end
end


function MainMenu:mousemoved(x, y, dx, dy)
    self.cursor:mousemoved(x, y, dx, dy)
end


------------------------------------------------------------------------------
-- Module return
------------------------------------------------------------------------------

return MainMenu