import os
from flask import Flask, render_template, url_for, send_from_directory, request, redirect
import frontmatter
import markdown
from prefix import PrefixMiddleware
from dotenv import load_dotenv
from time import strftime, localtime
import glob
import subprocess



load_dotenv()
prefix = os.environ.get('URL_PREFIX', '')
port = os.environ.get('PORT', 3000)
debug = os.environ.get('DEBUG', False)
update_script = os.environ.get('UPDATE', 'update.sh' )

# ---
# Functions
# ---

def list_files(folder, remove_ext=False):
    ''' Read all the functions in a folder '''
    names = []
    for entry in os.scandir(folder):
        # add to the list only proper files
        if entry.is_file(follow_symlinks=False):
            # remove the extension from the filename
            n = entry.name
            if remove_ext:
                n = os.path.splitext(entry.name)[0]
            names.append(n)
    return names

def txt_list():
    ''' Generate list of writings '''
    files = sorted(filter(os.path.isfile, glob.glob('txt/[!.]*.md')), key=lambda file: os.path.getmtime(file), reverse=True)
    writings = []
    for file in files:
        with open(file) as f:
            meta, content = frontmatter.parse(f.read())
            meta['slug'] = os.path.splitext(os.path.basename(file))[0]
            meta['last_edit'] = strftime('%d.%m.%Y', localtime(os.path.getmtime(file)))
            writings.append(meta)
    
    return writings

def render_list():
    subprocess.run(update_script, shell=True)
    with open('list.html', 'w+') as f:
        f.write(render_template('home.html', writings=txt_list()))


# ---
# Create Flask App
# ---

app = Flask(__name__)
app.wsgi_app = PrefixMiddleware(app.wsgi_app, prefix=prefix)

# ---
# Routes
# ---

@app.route('/')
def home():
    return send_from_directory(app.root_path,'list.html')

@app.route('/txt/<slug>')
def txt(slug):
    try:
        with open(f'txt/{slug}.md') as f:
            meta, content = frontmatter.parse(f.read())
            text = {**meta}
            text['content']=markdown.markdown(content)
            return render_template('text.html', text=text)
    except FileNotFoundError:
        return 'File not found!'

@app.route('/api/update', methods=['GET', 'POST'])
def update():
    render_list()
    if request.method == 'POST':
        render_list()
    return redirect(url_for('home'))



# ---
# Run the app
# ---

app.run(port=port, debug=debug)