from degal.command import command
from degal import templates

def render_image (ctx, image) :
    """
        Render the thumbnails and .html for one image
    """

    # log image path
    ctx.log_info("%s", image)

    # render output
    tpl = templates.master(ctx.gallery, image.title, image.html, 
        templates.image_page(image)
    )
    
    # write output
    tpl.render_file(image.html)

def render_folder_page (ctx, folder) :
    """
        Render the .html output for one folder
    """

    # render each page separately
    for page in xrange(folder.page_count) :
        # output .html page
        html_file = folder.html_file(page)
        
        # render template
        tpl = templates.master(ctx.gallery, folder.title, html_file,
            templates.folder_page(folder, page)
        )

        # write output
        tpl.render_file(html_file)
    

def render_folder (ctx, folder) :
    # index images that require updating
    image_count = len(folder.images)
    new_images = list(folder.index_images(for_update=(not ctx.config.force_update)))
    
    if new_images or ctx.config.force_update:
        # update folder index
        render_folder_page(ctx, folder)
        
        ctx.log_info("%s - render %d/%d images", folder, len(new_images), image_count)

        # update images
        for image in new_images :
            # update thumbs
            image.update()
            
            # render output
            render_image(ctx, image)
    
    else :
        ctx.log_info("%s - up to date", folder)

    # index subfolders
    for subfolder in folder.subfolders :
        render_folder(ctx, subfolder)

@command
def main (ctx) :
    """
        Scan the gallery for new folders/images, and render updated ones
    """

    # render the gallery
    render_folder(ctx, ctx.gallery)