"""Base handlers."""

from flask import g
from flask import jsonify
from flask import request
from oto import response
from oto.adaptors.flask import flaskify
from pympler import muppy
from pympler import summary

from backend import config
from backend.api import app
from backend.exceptions import RequestError


@app.route(config.HEALTH_CHECK, methods=['GET'])
def health():
    """Check the health of the application."""
    result = {'status': 'ok'}
    if config.ENVIRONMENT != config.PROD_ENVIRONMENT \
            and 'debug' in request.args:
        all_objects = muppy.get_objects()
        sum1 = summary.summarize(all_objects)
        lines = [row for row in summary.format_(sum1)]

        result['_debug'] = lines

    return jsonify(result)


@app.errorhandler(RequestError)
def handle_request_error(error):
    """Handle request and validation errors."""
    return error.make_flask_response()


@app.errorhandler(500)
def exception_handler(error):
    """Default handler when uncaught exception is raised.

    Note: Exception will also be sent to Sentry if config.SENTRY is set.

    Returns:
        flask.Response: A 500 response with JSON 'code' & 'message' payload.
    """
    message = (
        'The server encountered an internal error '
        'and was unable to complete your request.')
    g.log.exception(error)
    return flaskify(response.create_fatal_response(message))