from flask import Flask, Blueprint,render_template, send_from_directory,jsonify, url_for, abort
from flatpages_index import FlatPagesIndex
import flatpages_index
import os 
def create_bp(app):
    """Create Blueprint to register with Flask"""
    flatpages = FlatPagesIndex(app) # Init with the Flask App as argument
    flatpages_index.Links.endpoint="pages.page" #set the name of the endpoint for Links to pages
    flatpages_index.Links.url=(lambda s,x: url_for(s.endpoint, name=x)) # shorthand expects a function that creates urls for pages
    #flatpages_index.Links.image_url=(lambda s,x: url_for('stuff.page', name=x))
    flatpages_index.Links.file_url=(lambda s,x: url_for('pages.page', name=x)) # shorthand to create a link to a file
    flatpages_index.Links.thumb_url=(lambda s,x: url_for('pages.thumb', size=128,name=x)) # shorthand for thumbnails that may be used with pictures

    flatpages.get('index') # this ensures, that the pages are loaded
    app.logger.debug('flatpages loaded %d pages' % len(flatpages._pages))
    app.logger.debug("Data directory is: %s" % flatpages.root)

    page_blueprint  = Blueprint('pages', __name__)
    @page_blueprint.route('/thumb<int:size>/<path:name>/')
    def thumb(size=64,name=''):
        pass

    
    @page_blueprint.route('/<path:name>/')
    @page_blueprint.route('/')
    def page(name='index'):
        """This is the main endpoint of the application for all flatpages"""
        page = flatpages.get(name)
        
        if page:
            page["has_img"]=True
            page.links.endpoint='pages.page'
            return render_template(page["template"], post=page,
                                pth=page["dirpath"])
        app.logger.debug(f"delivering static file: {name}")
        
        # search different loctions for static file 
        paths = [ app.config['FLATPAGES_ROOT'], 
                  os.path.abspath(app.config['STATIC_ROOT'])
                  ]
        
        for p in paths:
            if os.path.exists(os.path.join(p,name)):
                return send_from_directory(p,name)
        app.logger.debug(f"Static file {name} not found in : {paths}")
        return abort(404)
            

    @page_blueprint.route('/<path:name>.json',strict_slashes=False)
    def pagejson(name='index'):
        page = flatpages.get(name)
        if not page is None:
            page["has_img"]=False
            page.links.endpoint='pages.pagejson'
    #        page.links.file_url=lambda n: url_for('intern.post', name=n)
            return jsonify(page=dict(page))
        
        # search different loctions for static file 
        paths = [ app.config['FLATPAGES_ROOT'], 
                  os.path.abspath(app.config['STATIC_ROOT'])
                  ]
        
        for p in paths:
            if os.path.exists(os.path.join(p,name)):
                return send_from_directory(p,name)
        app.logger.debug(f"Static file {name} not found in : {paths}")
        return abort(404)
    return page_blueprint