"""Application Handlers.

Requests are redirected to handlers, which are responsible for getting
information from the URL and passing it down to the logic layer. The way
each layer talks to each other is through Response objects which defines the
type status of the data and the data itself.

Please note: the Orchard uses the term handlers over views as convention
for clarity

See:
    oto.response for more details.
"""


from flask import g
from flask import jsonify
from flask import request

from oto import response
from oto.adaptors.flask import flaskify

from backend import config
from backend.api import app
from backend.logic import vendor as vendor_logic

# DO NOT IMPORT ANY MODELS


@app.route(config.HEALTH_CHECK, methods=['GET'])
def health():
    """Check the health of the application."""
    return jsonify({'status': 'ok'})


@app.route('/vendor/<int:vendor_id>', methods=['GET'])
#@handlers_util.get_headers
def get_vendor_details(vendor_id):
    """Fetch a single vendor's details.

    Returns:
        flask.Response: on successful, 200 status with JSON body.
    """
    result = vendor_logic.get_vendor_details(vendor_id)

    return flaskify(result)


@app.route('/vendors', methods=['GET'])
#@handlers_util.get_headers
def get_vendor_list_details():
    """Fetch a single vendor's details.

    Returns:
        flask.Response: on successful, 200 status with JSON body.
    """
    result = vendor_logic.get_multiple_vendor_details()

    return flaskify(result)


@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))