from wtforms import SubmitField, StringField, HiddenField, SelectField, validators
from flask import request, render_template
from flask_wtf import FlaskForm
from __main__ import db, app, ma

################################################################################
# Class describing Covertype in the database, and via sqlalchemy, connected to the DB as well
################################################################################
class Covertype(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 Covertype into json / useful in jinja2
################################################################################
class CovertypeSchema(ma.SQLAlchemyAutoSchema):
    class Meta: model = Covertype


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

################################################################################
# Routes for covertype data
#
# /covertypes -> GET only -> prints out list of all covertypes
################################################################################
@app.route("/covertypes", methods=["GET"])
def covertypes():
    covertypes = Covertype.query.order_by('id').all()
    return render_template( "show_id_name.html", objects=covertypes, page_title='Show All Covertypes', url_base='covertype')

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