# List all non *.md files within the directory
def list_dir_md(mypath):
    return [f for f in os.listdir(mypath) if isfile(os.path.join(mypath, f)) and re.match('.*\%s.*' % FLATPAGES_EXTENSION,f) is None]

# List all jpg images within the directory
def list_dir_img(mypath):
    return [f for f in os.listdir(mypath) if isfile(os.path.join(mypath, f)) and re.match('.*\.jpg',f) is not  None]

def path_depth(path):
    p_split=path.split('/')
    if path =="":
        cc=0
    else:
        cc=len(path.split('/'))
    if p_split[-1]=='index' or p_split[-1]=='index.json' :
        cc=cc-1
    return cc

# List all subpages of the current page 
def get_sub_pages(path):
    return [p for p in flatpages
            if (p.path.startswith(path) and  # is a subpage
                ( re.match('.*index',p.path) is None) and # is no index
                path_depth(p.path)<path_depth(path)+2) ] 

# List all index subpages of the current page i.e. all pages in subdirectories
def get_sub_ipages(path):
#    ppath=page.path
    cc=len(path.split('/'))
    if path=="":
        cc=0
        ppath="index"
    else:
        ppath=pjoin2([path,"index"])
    ps=[p for p in flatpages
        if (p.path.startswith(path) and # subpages of this page
            not ( re.match('.*index',p.path) is None) and # only index
            ( ppath != p.path) and # not identical page
            len(p.path.split('/'))<=cc+2) ] # only one level
    return ps 

# breadcrumbs decompose the path
# a/b/index -> [a/index a/b/index]
def get_breadcrumb_paths(path):
    elements = path.split('/')
    elements2 = ['index']
    for i in range(1,len(elements)):
        elements2.append(pjoin2(elements[0:i])+u'/index')
    return elements2

def get_breadcrumb_pages(paths):
    pages=[flatpages.get(p) for p in paths]
    return pages

def get_paths(pages):
    paths=[p.path for p in pages]
    return paths

def get_bc(path):
    return get_breadcrumb_pages(get_breadcrumb_paths(path))

# load a page from a path information
def get_flatpage(path):
    is_index=False
    # root index
    if path == 'index' or path=='': 
        is_index=True
        path=''
        pathi='index'
    else:
        if path.split('/')[-1]=='index': # last element is "index" ?
            is_index=True
            path='/'.join(path.split('/')[0:-1]) # remove index from path
        pathi = u'{}/{}'.format(path, 'index') # try to add index to the path
    page = flatpages.get(pathi) # try to load index page
    if not page is None: # if successful it is a index
        is_index=True
    else: 
        page=flatpages.get(path)
    return (is_index, path, page) 


def pjoin (rt,pth):
     return u'{}/{}'.format(rt,pth)

def pjoin2 (pth):
     return u'/'.join(pth) or u''

def misskey(a,key):
    if not a.has_key(key):
        return True
    return  a[key] is None

def page_defaults(page, is_index, path):
    if misskey(page.meta,"title"):
        page.meta["title"]=path.split('/')[-1]
    if misskey(page.meta, "template"):
        page.meta["template"]='page.html'
    return page
 
@app.route('/<path:name>/')
def post(name='index'):
    is_index, path, page = get_flatpage(name)
    app.logger.info('render '+name)
    path2 = pjoin(FLATPAGES_ROOT,path)
    
    if is_index == True and not page is None:
        ld=list_dir_md(path2)
        il=list_dir_img(path2)
        sp=get_sub_pages(path)
        spi=get_sub_ipages(path)
    else:
        ld=[]
        sp=[]
        spi=[]
        il=[]
    if not page is None:
        page_defaults(page,is_index,path)
        app.logger.info("Render Template"+page["template"] +"for "+path)
        return render_template(page.meta["template"], ld=ld, post=page, sp=sp, spi=spi, il=il, pth=path, pagebreadcrumbs=get_bc(path))
    
    if os.path.exists(u'{}/{}'.format(FLATPAGES_ROOT,path)):
        return send_from_directory(FLATPAGES_ROOT,path)
    else:
        return send_from_directory('static',path)



@app.route('/<path:name>.json/')
def postjson(name='index'):
    is_index, path, page = get_flatpage(name)
    app.logger.info('render '+name)
    path2 = pjoin(FLATPAGES_ROOT,path)
    
    if is_index == True and not page is None:
        ld=list_dir_md(path2)
        il=list_dir_img(path2)
        sp=get_sub_pages(path)
        spi=get_sub_ipages(path)
    else:
        ld=[]
        sp=[]
        spi=[]
        il=[]
    if not page is None:
        page_defaults(page,is_index,path)
        app.logger.info("Render Template"+page["template"] +"for "+path)
        p=page.meta
        bc=get_breadcrumb_paths(path)
        p["depth"]=path_depth(path)
        p["path"]=path
        p["breadcrumbs"]=bc
        p["subfolders"]=get_paths(spi)
        p["subpages"]= [u'%s.json' % p1 for p1 in get_paths(sp)]
        p["text"]=page.html
        return jsonify(page=p)
        #        return render_template(page.meta["template"], ld=ld, post=page, sp=sp, spi=spi, il=il, pth=path, pagebreadcrumbs=get_bc(path,page))

    
    if os.path.exists(u'{}/{}'.format(FLATPAGES_ROOT,path)):
        return send_from_directory(FLATPAGES_ROOT,path)
    else:
        return send_from_directory('static',path)