from wtforms import SubmitField, StringField, HiddenField, validators, Form
from flask import request, render_template
from __main__ import db, app, ma

################################################################################
# Class describing Publisher in the database, and via sqlalchemy, connected to the DB as well
################################################################################
class Publisher(db.Model):
    id = db.Column(db.Integer, unique=True, nullable=False, primary_key=True)
    name = db.Column(db.String(50), unique=False, nullable=False)

    def __repr__(self):
        return "<id: {}, name: {}>".format(self.id,self.name)

################################################################################
# Helper class that inherits a .dump() method to turn class Publisher into json / useful in jinja2
################################################################################
class PublisherSchema(ma.SQLAlchemyAutoSchema):
    class Meta: model = Publisher

################################################################################
# Helper class that defines a form for publisher, used to make html <form>, with field validation (via wtforms)
################################################################################
class PublisherForm(Form):
    id = HiddenField()
    name = StringField('Name:', [validators.DataRequired()])
    submit = SubmitField('Save' )
    delete = SubmitField('Delete' )

################################################################################
# Routes for publisher data
#
# /publishers -> GET only -> prints out list of all publishers
################################################################################
@app.route("/publishers", methods=["GET"])
def publishers():
    publishers = Publisher.query.all()
    return render_template("publishers.html", publishers=publishers)

################################################################################
# /publisher/<id> -> GET/POST(save or delete) -> shows/edits/delets a single publisher
################################################################################
@app.route("/publisher/<id>", methods=["GET", "POST"])
def publisher(id):
    ### DDP: should this be request.form or request.values?
    alert="Success"
    publisher_form = PublisherForm(request.form)
    if request.method == 'POST' and publisher_form.validate():
        id = request.form['id']
        publisher = Publisher.query.get(id)
        try:
            request.form['submit']
        except:
            message="Sorry, Deleting unsupported at present"
            alert="Danger"
        else:
            publisher.name = request.form['name']
            db.session.commit()
            message="Successfully Updated Publisher (id={})".format(id)
    else:
        publisher = Publisher.query.get(id)
        publisher_form = PublisherForm(request.values, obj=publisher)
        message=""
    return render_template("publisher.html", publisher=publisher, alert=alert, message=message, publisher_form=publisher_form)