from wtforms import SubmitField, StringField, FloatField, 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
from datetime import datetime, timedelta
import pytz

class Joblog(db.Model):
    id = db.Column(db.Integer, db.Sequence('ill_id_seq'), primary_key=True )
    job_id = db.Column(db.Integer, db.ForeignKey('job.id'), primary_key=True )
    log_date = db.Column(db.DateTime(timezone=True))
    log = db.Column(db.String)

    def __repr__(self):
        return "<id: {}, job_id: {}, log: {}".format(self.id, self.job_id, self.log )

################################################################################
# Class describing Action in the database, and via sqlalchemy, connected to the DB as well
################################################################################
class Job(db.Model):
    id = db.Column(db.Integer, db.Sequence('joblog_id_seq'), primary_key=True )
    start_time = db.Column(db.DateTime(timezone=True))
    last_update = db.Column(db.DateTime(timezone=True))
    name = db.Column(db.String)
    state = db.Column(db.String)
    num_passes = db.Column(db.Integer)
    current_pass = db.Column(db.Integer)
    num_files = db.Column(db.Integer)
    current_file_num = db.Column(db.Integer)
    current_file = db.Column(db.String)
    wait_for = db.Column(db.Integer)
    pa_job_state = db.Column(db.String)

    def __repr__(self):
        return "<id: {}, start_time: {}, last_update: {}, name: {}, state: {}, num_passes: {}, current_passes: {}, num_files: {}, current_file_num: {}, current_file: {}>".format(self.id, self.start_time, self.last_update, self.name, self.state, self.num_passes, self.current_pass, self.num_files, self.num_files, self.current_file_num, self.current_file)


################################################################################
# Utility classes for Jobs
################################################################################
def GetNumActiveJobs():
    ret = db.engine.execute("select num_active_jobs from pa_job_manager").first();
    if( ret != None ):
        return ret.num_active_jobs

###############################################################################
# NewJob takes a name (which will be matched in pa_job_manager.py to run 
# the appropriate job - which will update the Job() until complete
###############################################################################
def NewJob(name, num_passes="1", num_files="0", wait_for=None ):
    job=Job(start_time='now()', last_update='now()', name=name, state="New", num_passes=num_passes, num_files=num_files,
        current_pass=0, current_file_num=0, current_file='', 
        wait_for=wait_for, pa_job_state="New" )
    db.session.add(job)
    db.session.commit()

################################################################################
# /jobs -> show current settings
################################################################################
@app.route("/jobs", methods=["GET"])
def jobs():
    page_title='Job actions'
    jobs = Job.query.all() 
    return render_template("jobs.html", jobs=jobs, page_title=page_title)


###############################################################################
# /job/<id> -> GET -> shows status/history of jobs
################################################################################
@app.route("/job/<id>", methods=["GET"])
def joblog(id):
    page_title='Show Job Details'
    joblog = Job.query.get(id)
    logs=Joblog.query.filter(Joblog.job_id==id).all()
    duration=(datetime.now(pytz.utc)-joblog.start_time)
    duration= duration-timedelta(microseconds=duration.microseconds)
    return render_template("joblog.html", job=joblog, logs=logs, duration=duration, page_title=page_title)

###############################################################################
# This func creates a new filter in jinja2 to format the time from the db in a
# way that is more readable (converted to local tz too)
################################################################################
@app.template_filter('vicdate')
def _jinja2_filter_datetime(date, fmt=None):
    return date.strftime("%d/%m/%Y %I:%M:%S %p")