from wtforms import SubmitField, StringField, HiddenField, validators, TextAreaField, IntegerField
from flask_wtf import FlaskForm
from flask import request, render_template, redirect
from wtforms.fields.html5 import DateField
from __main__ import db, app, ma
from status import st, Status

################################################################################
# Class describing Series in the database, and via sqlalchemy, connected to the DB as well
################################################################################
class Series(db.Model):
    id = db.Column(db.Integer, db.Sequence('series_id_seq'), primary_key=True)
    title = db.Column(db.String(100), unique=False, nullable=False)
    num_books = db.Column(db.Integer, nullable=False)
    calcd_rating = db.Column(db.String(10), unique=False, nullable=False)
    note = db.Column(db.Text)

    def __repr__(self):
        return "<id: {}, title: {}, num_books: {}, calcd_rating: {}, note: {}>".format(self.id, self.title, self.num_books, self.calcd_rating, self.note)

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

################################################################################
# Helper class that defines a form for series, used to make html <form>, with field validation (via wtforms)
################################################################################
class SeriesForm(FlaskForm):
    id = HiddenField()
    title = StringField('Title:', [validators.DataRequired()])
    num_books = IntegerField('Number of Books:', [validators.NumberRange(min=1)])
    calcd_rating = StringField('Avg Rating:' )
    note = TextAreaField('Notes:')
    submit = SubmitField('Save' )
    delete = SubmitField('Delete' )

def CalcAvgRating(sid):
    res=db.engine.execute("select round(avg(to_number(r.name, '99')),1) as rating from book b, rating r, series s, book_series_link bsl where s.id={} and s.id = bsl.series_id and bsl.book_id = b.id and b.rating = r.id and r.name ~ E'^\\\\d+$'".format(sid))
    for row in res:
        print( row )
    return row.rating

def ListOfSeriesWithMissingBooks():
    res=db.engine.execute("select id, title, num_books, count from ( select s.id, s.title, s.num_books, count(bsl.book_id) from series s, book_series_link bsl where s.id = bsl.series_id group by s.id ) as foo where num_books > count")
    tmp=[]
    for row in res:
        tmp.append({'id': row[0], 'title': row[1]})
    return tmp

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

################################################################################
# /series -> GET/POST -> creates a new series type and when created, takes you back to /seriess
################################################################################
@app.route("/series", methods=["GET", "POST"])
def new_series():
    form = SeriesForm(request.form)
    if 'title' not in request.form:
        return render_template("series.html", form=form, page_title='Create new Series' )
    else:
        series = Series( title=request.form["title"], num_books=request.form["num_books"], note=request.form["note"], calcd_rating=0 )
        db.session.add(series)
        db.session.commit()
        st.SetMessage( "Created new Series (id={})".format(series.id) )
        return redirect( '/seriess' )

################################################################################
# /series/<id> -> GET/POST(save or delete) -> shows/edits/delets a single series
################################################################################
@app.route("/series/<id>", methods=["GET", "POST"])
def series(id):
    ### DDP: should this be request.form or request.values?
    form = SeriesForm(request.form)
    page_title='Edit Series'
    if request.method == 'POST' and form.validate():
        try:
            series = Series.query.get(id)
            if 'delete' in request.form:
                st.SetMessage("Successfully deleted (id={}, title={})".format( series.id, series.title ) )
                series = Series.query.filter(Series.id==id).delete()
            if 'submit' in request.form:
                st.SetMessage("Successfully Updated Series (id={})".format(id) )
                series.title = request.form['title']
                series.num_books = request.form['num_books']
                series.calcd_rating = CalcAvgRating(id)
                series.note = request.form['note']
            db.session.commit()
            return redirect( '/seriess' )
        except SQLAlchemyError as e:
            print("series -- error!")
            st.SetAlert( "danger" )
            st.SetMessage( "<b>Failed to modify Series:</b>&nbsp;{}".format(e.orig) )
            return render_template("edit_id_name.html", form=form, page_title=page_title, alert=st.GetAlert(), message=st.GetMessage() )
    else:
        series = Series.query.get(id)
        form = SeriesForm(request.values, obj=series)
    return render_template("series.html", form=form, page_title=page_title )

################################################################################
# Gets the Series matching id from DB, helper func in jinja2 code to show books
################################################################################
def GetSeriesById(id):
    return Series.query.get(id).name