# @name: tool.py
# @creation_date: 2021-10-20
# @license: The MIT License <https://opensource.org/licenses/MIT>
# @author: Simon Bowie <ad7588@coventry.ac.uk>
# @purpose: tool route for tool-related functions and pages
# @acknowledgements:
# https://www.digitalocean.com/community/tutorials/how-to-make-a-web-application-using-flask-in-python-3

from flask import Blueprint, render_template, request, flash, redirect, url_for
from flask_login import login_required, current_user
from .models import Resource
from .resources import *
from .relationships import *
from werkzeug.exceptions import abort
from . import db
import os

tool = Blueprint('tool', __name__)

# route for displaying all tools in database
@tool.route('/tools')
def get_tools():
    tools = Resource.query.filter_by(type='tool')
    for key in request.args.keys():
        if key == 'practice':
            query = 'SELECT Resource.* FROM Resource LEFT JOIN Relationship ON Resource.id=Relationship.first_resource_id WHERE Relationship.second_resource_id=' + request.args.get(key) + ';'
            tools = db.engine.execute(query)
        elif key == 'scriptingLanguage':
            regex = request.args.get(key) + "$|" + request.args.get(key) + "\s\/"
            tools = Resource.query.filter_by(type='tool').filter(Resource.scriptingLanguage.regexp_match(regex))
        else:
            kwargs = {'type': 'tool', key: request.args.get(key)}
            tools = Resource.query.filter_by(**kwargs)
    # get filters
    # practices 
    practices_filter = Resource.query.filter_by(type='practice').with_entities(Resource.id, Resource.name)
    #FOR LATER: SELECT Resource.name, second.name FROM Resource LEFT JOIN Relationship ON Resource.id=Relationship.first_resource_id LEFT JOIN Resource second ON Relationship.second_resource_id=second.id;
    # license
    licenses_filter = get_filter_values('license')
    # language
    languages_filter = get_filter_values('scriptingLanguage')
    return render_template('resources.html', resources=tools, type='tool', practices_filter=practices_filter, licenses_filter=licenses_filter, languages_filter=languages_filter)

# route for displaying a single tool based on the ID in the database
@tool.route('/tools/<int:tool_id>')
def show_tool(tool_id):
    tool = get_resource(tool_id)
    relationships = get_relationships(tool_id)
    return render_template('resource.html', resource=tool, relationships=relationships)

# route for editing a single tool based on the ID in the database
@tool.route('/tools/<int:tool_id>/edit', methods=('GET', 'POST'))
@login_required
def edit_tool(tool_id):
    tool = get_resource(tool_id)
    resource_dropdown = Resource.query
    existing_relationships = get_relationships(tool_id)

    if request.method == 'POST':
        if not request.form['name']:
            flash('Name is required!')
        else:
            tool = Resource.query.get(tool_id)
            tool.name = request.form['name']
            tool.description = request.form['description']
            tool.developer = request.form['developer']
            tool.developerUrl = request.form['developerUrl']
            tool.projectUrl = request.form['projectUrl']
            tool.repositoryUrl = request.form['repositoryUrl']
            tool.license = request.form['license']
            tool.scriptingLanguage = request.form['scriptingLanguage']
            tool.expertiseToUse = request.form['expertiseToUse']
            tool.expertiseToHost = request.form['expertiseToHost']
            tool.dependencies = request.form['dependencies']
            tool.ingestFormats = request.form['ingestFormats']
            tool.outputFormats = request.form['outputFormats']
            tool.status = request.form['status']
            db.session.commit()
            linked_resources = request.form.getlist('linked_resources')
            remove_linked_resources = request.form.getlist('remove_linked_resources')

            edit_relationships(tool_id, linked_resources, remove_linked_resources, existing_relationships)
            
            return redirect(url_for('tool.get_tools',_external=True,_scheme=os.environ.get('SSL_SCHEME')))

    return render_template('edit.html', resource=tool, resource_dropdown=resource_dropdown, links=existing_relationships)

# route for function to delete a single tool from the edit page
@tool.route('/tools/<int:tool_id>/delete', methods=('POST',))
@login_required
def delete_tool(tool_id):
    delete_resource(tool_id)
    return redirect(url_for('tool.get_tools',_external=True,_scheme=os.environ.get('SSL_SCHEME')))