from wtforms import SubmitField, StringField, HiddenField, validators, Form
from flask_wtf import FlaskForm
from flask import request, render_template, redirect
from main import db, app, ma
from sqlalchemy import Sequence
from sqlalchemy.exc import SQLAlchemyError
from status import st, Status

################################################################################
# Class describing Author in the database, and via sqlalchemy, connected to the DB as well
################################################################################
class Settings(db.Model):
    id = db.Column(db.Integer, db.Sequence('settings_id_seq'), primary_key=True )
    name = db.Column(db.String, unique=True, nullable=True )
    value = db.Column(db.String, unique=True, nullable=True )

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

###############################################################################
# Helper class that inherits a .dump() method to turn class Author into json / useful in jinja2
################################################################################
class SettingsSchema(ma.SQLAlchemyAutoSchema):
    class Meta:
        model = Settings
        ordered = True

settings_schema=SettingsSchema()

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

################################################################################
# /settings -> show current settings
################################################################################
@app.route("/settings", methods=["GET"])
def settings():
    sets = Settings.query.all()
    form = SettingsForm()
    page_title='Show Settings'
    return render_template("settings.html", objects=sets, form=form, page_title = page_title, alert=st.GetAlert(), message=st.GetMessage() )

################################################################################
# /setting/<id> -> show current settings
################################################################################
@app.route("/setting/<id>", methods=["GET", "POST"])
def setting(id):
    form = SettingsForm(request.form)
    if request.method == 'POST' and form.validate():
        try:
            s = Settings.query.get(id)
            if 'submit' in request.form:
                st.SetMessage("Successfully Updated Setting (name={})".format(s.name) )
                s.name = request.form['name']
                s.value = request.form['value']
            db.session.commit()
            return redirect( '/settings' )
        except SQLAlchemyError as e:
            st.SetAlert( "danger" )
            st.SetMessage( "<b>Failed to modify Setting:</b>&nbsp;{}".format(e.orig) )
            return render_template("edit_setting.html", form=form, page_title=page_title, alert=st.GetAlert(), message=st.GetMessage() )
    else:
        s = Settings.query.get(id)
        page_title='Edit Setting: {}'.format(s.name)
        form = SettingsForm(request.values, obj=s)
        return render_template("setting.html", objects=s, form=form, page_title = page_title, alert=st.GetAlert(), message=st.GetMessage() )