class ExportSCROM

# File lib/print-scorm.rb, line 12
def initialize(skip_existing=true)
    super()
    @skip_existing = skip_existing
end

# File lib/print-scorm.rb, line 134
def all_bullets_loaded(b)
    all_loaded = true
    b.ps(class: "bullet").map do |bullet|
        all_loaded = all_loaded && bullet.visible?
    end
    
    b.lis(class: "bullet").map do |bullet|
        all_loaded = all_loaded && bullet.visible?
    end
    return all_loaded
end

# File lib/print-scorm.rb, line 17
def browser
    return @@browser
end

# File lib/print-scorm.rb, line 21
def run(zipfile, target_name)
    @@browser = Watir::Browser.new :firefox unless @@browser
    zipfile = File.join(Dir.pwd, zipfile) unless zipfile.start_with? "/"
    directory = File.dirname(zipfile)
    
    if @skip_existing && FileTest.exists?(target_name)
        puts "Skipping the already existing `#{target_name}`"
        return nil
    end
    
    tempdir = File.join(directory, "__tmp")
    p tempdir
    `rm -r "#{tempdir}"` if FileTest.exist? tempdir
    `mkdir -p "#{tempdir}"`
    `unzip "#{zipfile}" -d "#{tempdir}"`
    
    b = @@browser
    b.window.resize_to 1200, 900
    b.goto "file://"+tempdir+"/scorm2004RLO.htm"
    b.alert.ok #Ok to the alert
    
    if b.html.include? "This project does not contain any pages."
        return nil
    end
    
    begin
        b.button(title: "Full Screen").click
    rescue
        puts "No fullscreen button!!"
    end

    sleep 1
    all_screenshots = []
    page_index = 0
    screenshot(tempdir, page_index, b, all_screenshots)

    while b.button(id: "x_nextBtn").enabled?
        b.button(id: "x_nextBtn").click #fullscreen
        sleep MAX_SLEEPTIME
        
        # Wait for bullets to load
        start_time = Time.now
        while !all_bullets_loaded(b) && (Time.now - start_time < MAX_TIMEOUT)
            sleep 1
        end
        
        page_index += 1
        last_screenshot = screenshot(tempdir, page_index, b, all_screenshots)
        skip_click = false
        while b.button(id: "nextBtn").exists? && b.button(id: "nextBtn").enabled?
            unless skip_click
                b.button(id: "nextBtn").click #fullscreen
            else
                skip_click = false
            end
            sleep MAX_SLEEPTIME
            
            page_index += 1
            new_screenshot = screenshot(tempdir, page_index, b, all_screenshots)
            
            if new_screenshot[:hash] == last_screenshot[:hash]
                puts "Loop detected. Avoiding..."
                page_index -= 1
                all_screenshots.pop
                break
            else
                last_screenshot = new_screenshot
            end
        end
        
        accordion_id = 1
        accordion_button = b.h3(id: ACCORDION_ID + accordion_id.to_s)
        while accordion_button.exists?
            accordion_button.click
            sleep MAX_SLEEPTIME
            
            page_index += 1
            new_screenshot = screenshot(tempdir, page_index, b, all_screenshots)
            
            accordion_id += 1
            accordion_button = b.h3(id: ACCORDION_ID + accordion_id.to_s)
        end
        
        oldScroll = @@browser.execute_script("return document.getElementById('x_pageHolder').scrollTop")
        i = 1
        loop do
            b.execute_script "document.getElementById('x_pageHolder').scrollTo(0, document.getElementById('x_pageHolder').clientHeight*#{i})"
            
            newScroll = @@browser.execute_script("return document.getElementById('x_pageHolder').scrollTop")

            break if oldScroll == newScroll
            
            sleep 0.5
            page_index += 1
            screenshot(tempdir, page_index, b, all_screenshots)
            
            oldScroll = newScroll
            i += 1
        end
        
        go_ahead_buttons = b.buttons(class: "ui-button-text-only")
        if go_ahead_buttons.size > 0
            if b.html.include? "<h2 aria-live=\"assertive\">Sommario</h2>"
                go_ahead_buttons[0].click
                skip_click = true
            end
        end
    end
    
    `convert #{all_screenshots.join(" ")} "#{target_name}"`
    `rm -r "#{tempdir}"`
end

# File lib/print-scorm.rb, line 146
def screenshot(tempdir, page_index, b, all_screenshots)
    fname = File.join(tempdir, "page#{page_index}.png")
    b.screenshot.save(fname)
    all_screenshots.push "\"#{fname}\""
    
    return {
        name: fname, 
        hash: `md5sum "#{fname}"`.split(" ")[0]
    }
end