import os
import logging
import logging.handlers

logger = logging.getLogger("")
logger.setLevel(logging.DEBUG)
handler = logging.handlers.RotatingFileHandler("flask.log",
    maxBytes=3000000, backupCount=2)
formatter = logging.Formatter(
    '[%(asctime)s] {%(filename)s:%(lineno)d} %(levelname)s - %(message)s')
handler.setFormatter(formatter)
logger.addHandler(handler)
logging.getLogger().addHandler(logging.StreamHandler())

from flask import Flask, send_from_directory, request

from app.settings import app_cfg

def create_demo_app(script_info=None):
  """
  functional pattern for creating the flask app
  """
  logging.debug("Starting Swimmer demo server...")
  app = Flask(__name__, static_folder=app_cfg.DIR_EXPORTS, static_url_path='/')
  app.config['SERVER_NAME'] = app_cfg.DEMO_SERVER_NAME
  app.url_map.strict_slashes = False

  @app.errorhandler(404)
  def not_found(error):
    path, fn = os.path.split(request.path)
    path = path[1:]
    dir_path = os.path.join(app_cfg.DIR_EXPORTS, path)
    if os.path.isfile(os.path.join(dir_path, fn)):
      return send_from_directory(dir_path, fn)
    if os.path.isfile(os.path.join(dir_path, fn, 'index.html')):
      return send_from_directory(os.path.join(dir_path, fn), 'index.html')
    return "404", 404

  @app.route('/')
  def serve_index():
    return "Swimmer demo", 200

  @app.route('/favicon.ico')
  def favicon():
    return send_from_directory(os.path.join(app_cfg.DIR_STATIC, 'img'),
      'favicon.ico', mimetype='image/vnd.microsoft.icon')

  return app