# Project is now migrating to another toolchain
# Stage1: Part of rendering is done via Makefiles
# but flask is still responsible for template substitution

from flask import Flask, url_for, render_template
import os
from app.config import PANDOC_LINK, PANDOC_PATH, WHITELIST_PATH
from app.page_model import WikiPage
from typing import List

app = Flask(__name__)


@app.context_processor
def override_url_for():
    return dict(url_for=dated_url_for)


def get_all_names():
    whitelist = WHITELIST_PATH
    with open(whitelist, 'r') as f:
        lines = f.read().splitlines()
    return lines


def get_page(name: str) -> WikiPage:
    path = f'{PANDOC_PATH}/{name}'
    with open(f'{path}/config.json', 'r') as f:
        page = WikiPage.parse_raw(f.read())
    return page


def get_all_pages() -> List[WikiPage]:
    return [get_page(name) for name in get_all_names()]


def dated_url_for(endpoint, **values):
    if endpoint == 'static':
        filename = values.get('filename', None)
        if filename:
            file_path = os.path.join(app.root_path, endpoint, filename)
            values['q'] = int(os.stat(file_path).st_mtime)
    return url_for(endpoint, **values)


@app.route(f'/{PANDOC_LINK}/<name>')
def get_pandoc_page(name: str):
    if name not in get_all_names():
        return "Page doesn't exist"
    page = get_page(name)
    template = page.template
    with open(page.get_file('render.html'), 'r') as f:
        inserted = f.read()
    return render_template(template, markdown=inserted, config=page)


@app.route('/')
def index():
    return render_template('index.html', pages=get_all_pages(), PANDOC_LINK=PANDOC_LINK)