#!/usr/bin/env python3

import os, sys
from sys import stdout
import flask 
from flask import request

import tfidf
import readings


# Create the application.
APP = flask.Flask(__name__)

# Jinja filters
def prettyfilename(filename):
	return filename.replace('_', ' ').replace('-', ' ').replace('.txt', '')
APP.jinja_env.filters['prettyfilename'] = prettyfilename

# Jinja globals
def get_random(x, y):
	from random import randint
	return randint(x, y)
APP.jinja_env.globals.update(get_random=get_random)

@APP.route('/', methods=['GET', 'POST'])
def index():
	""" 
		Displays the index page accessible at '/'
		Which is either the start page (using the index.html template) 
		or a results page (using the results.html template).
	"""
	query = None
	results = None

	query = request.args.get('q', '')
	suggestions = open('words.txt', 'r').readlines()

	if request.args.get('q', ''):
		filenames, results, analytics = readings.request_results(query)
		return flask.render_template('results.html', query=query, results=results, filenames=filenames, suggestions=suggestions, analytics=analytics)
	
	else:
		index = readings.load_index()
		filenames = [document for document, _ in index.items()]
		return flask.render_template('index.html', filenames=filenames, suggestions=suggestions)

@APP.route('/document/<name>', methods=['GET', 'POST'])
def open_document(name):
	""" 
		Read document.
	"""
	index = readings.load_index()
	suggestions = open('words.txt', 'r').readlines()
	filenames = sorted([document for document, _ in index.items()])
	txt = open('txt/{}.txt'.format(name), 'r').readlines()
	return flask.render_template('document.html', filenames=filenames, txt=txt, suggestions=suggestions)

@APP.route('/list/<list_type>/<filename>', methods=['GET', 'POST'])
def render_list_for_document(list_type, filename):
	""" 
		Show list of (TF / IDF / TF-IDF) values of one document.
	"""
	index = readings.load_index()
	suggestions = open('words.txt', 'r').readlines()
	filenames = sorted([document for document, _ in index.items()])
	values_list = [(value, word) for word, value in index[filename][list_type].items()]
	return flask.render_template('list.html', filenames=filenames, suggestions=suggestions, list=values_list, list_type=list_type, filename=filename)

@APP.route('/mappings/<mapping_type>', methods=['GET', 'POST'])
def get_contrast_mappings(mapping_type):
	""" 
		Displays the page accessible at '/mappings'.
		A listed overview of all values in the dataset is displayed.	
	"""
	mappings, filenames = readings.request_mappings(mapping_type)
	suggestions = open('words.txt', 'r').readlines()
	return flask.render_template('mappings.html', filenames=filenames, suggestions=suggestions, mappings=mappings, mapping_type=mapping_type)

@APP.route('/mapping/<name>', methods=['GET', 'POST'])
def contrast_mappings_name(name):
	""" 
		Displays the page accessible at '/mappings/<name>'.
		A TF-IDF visualisation is displayed from the specific document, using the TF-IDF values as font-size.
	"""
	mappings, filenames = readings.request_mappings_for_document(name)
	print(name)
	suggestions = open('words.txt', 'r').readlines()
	return flask.render_template('mappings.name.html', filenames=filenames, suggestions=suggestions, mappings=mappings[name], document=name)

if __name__ == '__main__':
	if not 'index.json' in os.listdir('.'):
		tfidf.create_index()
	APP.debug=True
	APP.run(port=5001)