import os
from datetime import datetime as dt, timezone as tz
from flask import request, redirect, url_for, flash, render_template, Blueprint, session, current_app
from flask_security import hash_password, roles_required, roles_accepted, current_user
from werkzeug.utils import secure_filename

from ..models.document import Document, DocumentLanguage, DocumentVersion
from ..extensions import db
from .document_forms import AddDocumentForm
from ..utils.database import Database
from ..utils.middleware import mw_before_request

document_bp = Blueprint('document_bp', __name__, url_prefix='/document')


@document_bp.before_request
def before_request():
    mw_before_request()


@document_bp.route('/add_document', methods=['GET', 'POST'])
@roles_accepted('Super User', 'Tenant Admin')
def add_document():
    form = AddDocumentForm()
    if request.method == 'POST' and form.validate_on_submit():
        file = form.file.data
        filename = secure_filename(file.filename)
        extension = filename.rsplit('.', 1)[1].lower()

        # Create the Document
        new_doc = Document()
        if form.name.data == '':
            new_doc.name = filename.rsplit('.', 1)[0]
        else:
            new_doc.name = form.name.data

        timestamp = dt.now(tz.utc)
        if form.valid_from.data or form.valid_from.data != '':
            new_doc.valid_from = form.valid_from.data
        else:
            new_doc.valid_from = timestamp

        new_doc.created_at = timestamp
        new_doc.updated_at = timestamp
        new_doc.created_by = current_user.id
        new_doc.updated_by = current_user.id
        db.session.add(new_doc)

# TODO: Continue from here on and complete add_document
        # Create the DocumentLanguage
        new_doc_lang = DocumentLanguage()
        language = form.language.data

        file.save(os.path.join(current_app.config['UPLOAD_FOLDER'], filename))
        return redirect(url_for('document_bp.add_document'))