"""Web Server Gateway Interface with autoreload to render spawner template.

Usage: `python -m render`

"""
from pathlib import Path
from traceback import format_exc

import glicid_spawner
from flask import Flask, render_template, request
from glicid_spawner.form import options_attrs, options_form, options_from_form
from livereload import Server

# Monkeypatch
USERNAME = 'john-doe'
glicid_spawner.micromamba.MICROMAMBA_ROOT = (
    Path(__file__).parent / '..' / 'tests' / 'data' / 'micromamba'
).resolve()
glicid_spawner.micromamba.GLOBAL_USER = 'global'
glicid_spawner.micromamba.GLOBAL_EXCLUDED = 'qux'

# Flask app
app = Flask(__name__)
app.debug = True


@app.route('/')
def home():
    """Form spawner home page."""
    return render_template(
        'form.html', spawner_options_form=options_form(USERNAME), options=options_attrs(USERNAME)
    )


@app.route('/submit', methods=['POST'])
def submit():
    """Reformat form data and extract spawner options.

    https://jupyterhub.readthedocs.io/en/stable/reference/spawners.html#spawner-options-from-form

    """
    formdata = dict(request.form.lists())

    # Trying to parse the options from the formdata
    try:
        return render_template(
            'options.html', formdata=formdata, options=options_from_form(formdata)
        )
    except Exception:
        return render_template('options.html', formdata=formdata, err=format_exc())


def server_autoreload():
    """Start auto-reload server."""
    server = Server(app.wsgi_app)
    server.serve()


if __name__ == '__main__':
    server_autoreload()