import flask
from flask import request, redirect
from urllib.request import urlopen
from urllib.parse import urlencode
import json
import os
import pypandoc
from jinja2 import Template

APP = flask.Flask(__name__)
APP.config.from_object("config.Config")

# ---

def get_pad_content(pad):
	arguments = { 
		'padID' : pad,
		'apikey' : APP.config['PAD_API_KEY']
	}
	api_call = 'getText'
	response = json.load(urlopen(f"{ APP.config['PAD_API_URL'] }{ api_call }", data=urlencode(arguments).encode()))
	content = response['data']['text']
	
	return content

def update_pad_contents():
	# download the stylesheet + template pad
	css = get_pad_content('feedmode.css')
	template = get_pad_content('feedmode.template')
	# !!! this breaks the whole idea that this application can be shared by multiple projects at the same time
	# !!! but py_pandoc needs to run with files........ hmmm
	with open('templates/pandoc-template.html', 'w') as f:
		f.write(template)

	return css, template

def get_multifeeder_feed(query):
	feed_json = json.load(urlopen(query))
	multifeeder_template = open('templates/multifeeder-template.html').read()
	jinja_template = Template(multifeeder_template)
	feed_html = jinja_template.render(response=feed_json)

	return feed_html, feed_json

def load_query():
	query = open('static/query.txt').read().strip() # !!! needs fixing

	return query

# ---

@APP.route('/', methods=['GET'])
def index():
	return redirect("/preview/", code=302)

@APP.route('/update/', methods=['POST'])
def update():
	query = request.form['query']
	with open('static/query.txt', 'w') as out:
		out.write(query)

	return redirect("/select/", code=302)

@APP.route('/select/', methods=['GET'])
def select():
	# get feed contents
	# render selection template with checkboxes
	query = load_query()
	x, feed_json = get_multifeeder_feed(query)

	return flask.render_template('selection-template.html', feed=feed_json, query=query)

@APP.route('/preview/', methods=['GET'])
def preview():
	# update pad contents
	x, template_content = update_pad_contents()
	# get feed contents
	query = load_query()
	feed_html, x = get_multifeeder_feed(query)
	# render multifeeder feed in template
	template = Template(template_content)
	html = template.render(feed=feed_html, mode="screen")

	return flask.render_template('html.html', html=html, query=query)

@APP.route('/stylesheet/', methods=['GET'])
def stylesheet():
	ext = '.css'
	query = load_query()
	
	return flask.render_template('pad.html', name="feedmode", ext=ext, query=query)

@APP.route('/template/', methods=['GET'])
def template():
	ext = '.template'
	query = load_query()
	
	return flask.render_template('pad.html', name="feedmode", ext=ext, query=query)

@APP.route('/pdf/')
def pdf():
	query = load_query()
	
	return flask.render_template('pdf.html', query=query)

# //////////////
# rendered resources (not saved as a file on the server)

@APP.route('/print.css')
def css():
	css, x = update_pad_contents()
	
	return css, 200, {'Content-Type': 'text/css; charset=utf-8'}

@APP.route('/pandoc-template.html')
def pandoc_template():
	x, template = update_pad_contents()
	
	return template, 200, {'Content-Type': 'text/html; charset=utf-8'}

@APP.route('/pagedjs.html')
def pagedjs():
	# update pad contents
	x, template = update_pad_contents()
	# get feed contents
	query = "https://multi.vvvvvvaria.org/API/latest/50" # !!! needs fixing
	feed_html, feed_json = get_multifeeder_feed(query)
	# render multifeeder feed in template
	jinja_template = Template(template)
	html = jinja_template.render(feed=feed_html, mode="print")

	return html, 200, {'Content-Type': 'text/html; charset=utf-8'}

# //////////////

if __name__ == '__main__':
	APP.debug=True
	APP.run(host="0.0.0.0", port=f'{ APP.config["PORTNUMBER"] }', threaded=True)