display.setStatusBar(display.HiddenStatusBar)
local storyboard = require "storyboard"
local scene = storyboard.newScene()
local json = require ("json")

local audioChange = nil

----------------------------
-- Functions
----------------------------

local function buttonToggle(event)
    local button = event.target
    button.currentFrame = 3 - button.currentFrame
    local volume
    if button.currentFrame == 2 then
        volume = 0
    else
        volume = 1
    end
    Runtime:dispatchEvent{name='Options'; Music = {Volume=volume} }

local function buttonTouch(event)
    local button = event.target
    local bounds = button.contentBounds
    if event.phase == "began" then
        button.currentFrame = 2
        display.getCurrentStage():setFocus(button, event.id)
        button.isFocused = true
    elseif button.isFocused then
        local isWithinBounds = bounds.xMin <= event.x and bounds.xMax >= event.x and bounds.yMin <= event.y and bounds.yMax >= event.y
        if event.phase == "moved" then
            if isWithinBounds then
                button.currentFrame = 2
            else
                button.currentFrame = 1
            end
        elseif event.phase == "ended" or event.phase == 'cancelled' then
            if event.phase == "ended" and isWithinBounds then
                if options.audio then
                    audio.play(audioChange)
                end
                button.currentFrame = 1
                storyboard.gotoScene(button.targetScene, "slideRight", 500)
            end
            button.currentFrame = 1
            display.getCurrentStage():setFocus(button, nil)
            button.isFocused = false
        end
    end
end

----------------------------
-- Storyboard
----------------------------

function scene:createScene(event)
    local group = self.view
    if options.audio then
        audioChange = audio.loadSound("audio/menu_change" .. storyboard.audioType)
    end
    local background = display.newImage(group, "visuals/options_background.png", 0, 0)
    local button = {}
        button.ToggleSheet = sprite.newSpriteSheet("visuals/options_buttontoggle.png", 150, 80)
        button.ToggleSet = sprite.newSpriteSet(button.ToggleSheet, 1, 2)
        button.ToggleAudio = sprite.newSprite(button.ToggleSet)
            if not options.audio then
                button.ToggleAudio.currentFrame = 2
            end
            button.ToggleAudio:addEventListener("tap", buttonToggle)
            button.ToggleAudio:setReferencePoint(display.TopLeftReferencePoint)
            button.ToggleAudio.x = 468
            button.ToggleAudio.y = 50
            group:insert(button.ToggleAudio)
        button.OptionsBackSheet = sprite.newSpriteSheet("visuals/menu_buttonback.png", 100, 100)
        button.OptionsBackSet = sprite.newSpriteSet(button.OptionsBackSheet, 1, 2)
        button.OptionsBack = sprite.newSprite(button.OptionsBackSet)
            group:insert(button.OptionsBack)
            button.OptionsBack.targetScene = "menuScene"
            button.OptionsBack:addEventListener("touch", buttonTouch)
            button.OptionsBack:setReferencePoint(display.TopLeftReferencePoint)
            button.OptionsBack.x = 30
            button.OptionsBack.y = 510
end

function scene:exitScene(event)
    if options.audio then
        audio.stop()
        audio.dispose(audioChange)
    end
    storyboard.purgeScene("optionsScene")
end

scene:addEventListener("createScene", scene)
scene:addEventListener("exitScene", scene)
return scene